private async Task CollectionSamples()
{
var database = Client.GetDatabase(Constants.SamplesDatabase);
#region Typed classes commands
// Will create the users collection on the fly if it doesn't exists
var personsCollection = database.GetCollection <User>(Constants.UsersCollection);
var bsonPersonsCollection = database.GetCollection <BsonDocument>(Constants.UsersCollection);
User typedUser = RandomData.GenerateUsers(1).First();
await personsCollection.InsertOneAsync(typedUser);
// Create another collection
var loginsCollectionName = "logins";
await database.CreateCollectionAsync(loginsCollectionName);
// list collections
var collections = (await database.ListCollectionsAsync()).ToList();
Utils.Log(collections, "List Collections");
// remove collection
await database.DropCollectionAsync(loginsCollectionName);
#region Capped collection
// create a capped collection
// 'size' field is required when 'capped' is true
await database
.CreateCollectionAsync(Constants.TravelersCollection,
new CreateCollectionOptions()
{
Capped = true, MaxDocuments = 3, MaxSize = 10000
});
var travelers = RandomData.GenerateTravelers(3);
travelers.First().Name = "Christos";
var travelersCollection = database
.GetCollection <Traveler>(Constants.TravelersCollection);
await travelersCollection.InsertManyAsync(travelers);
// Max documents reached - Now let's insert another one
await travelersCollection.InsertManyAsync(RandomData.GenerateTravelers(1));
// Read all the docs
var dbTravelers = await travelersCollection.Find(Builders <Traveler> .Filter.Empty).ToListAsync();
// First user 'Christos' has been removed from the collection so that the new one can fit in
#endregion
#endregion
}
private async Task WriteConcernSamples()
{
var personsDatabase = Client.GetDatabase(Constants.SamplesDatabase);
#region Prepare data
var writeConcern = new WriteConcern(w: new Optional <WriteConcern.WValue>("0"), journal: false);
var user = RandomData.GenerateUsers(1).First();
var usersCollection = personsDatabase.GetCollection <User>(Constants.UsersCollection)
.WithWriteConcern(writeConcern);
// Requests no acknowledgment of the write operation
// no user id available!
// Command insert failed: cannot use non-majority 'w' mode 0 when a host is not a member of a replica set.'
await usersCollection.InsertOneAsync(user);
List <User> users = RandomData.GenerateUsers(3000);
await usersCollection.InsertManyAsync(users);
var totalUsers = await usersCollection.CountDocumentsAsync(Builders <User> .Filter.Empty);
var unassigned = users.Where(u => u.Id.Equals(default(ObjectId)));
#endregion
#region Typed classes commands
#endregion
#region BsonDocument commands
#endregion
#region Shell commands
#if false
#endif
#endregion
}
private async Task DeleteSamples()
{
var usersDatabase = Client.GetDatabase(Constants.SamplesDatabase);
#region Prepare data
// Will create the users collection on the fly if it doesn't exists
var personsCollection = usersDatabase.GetCollection <User>(Constants.UsersCollection);
var appPerson = RandomData.GenerateUsers(1).First();
// Insert one document
await personsCollection.InsertOneAsync(appPerson);
// Insert multiple documents
var persons = RandomData.GenerateUsers(30);
await personsCollection.InsertManyAsync(persons);
#endregion
#region Typed classes commands
// Find a person using a class filter
var filter = Builders <User> .Filter.Eq(person => person.Id, appPerson.Id);
// delete person
var personDeleteResult = await personsCollection.DeleteOneAsync(filter);
if (personDeleteResult.DeletedCount == 1)
{
Utils.Log($"Document {appPerson.Id} deleted");
}
// Delete the first document
var emptyFilter = Builders <User> .Filter.Empty;
// delete person
var firstPersonDeleteResult = await personsCollection.DeleteOneAsync(emptyFilter);
// Find multiple documents having 1200 < salary < 3500
var salaryFilter = Builders <User> .Filter
.And(
Builders <User> .Filter.Gt(person => person.Salary, 1200),
Builders <User> .Filter.Lt(person => person.Salary, 3500)
);
var totalPersons = await personsCollection.Find(salaryFilter).CountDocumentsAsync();
var personsDeleteResult = await personsCollection.DeleteManyAsync(salaryFilter);
if (personsDeleteResult.DeletedCount.Equals(totalPersons))
{
Utils.Log($"{totalPersons} users deleted");
}
// Delete all documents
// await personsCollection.DeleteManyAsync(Builders<User>.Filter.Empty);
#endregion
#region BsonDocument commands
// we need to get the BsonDocument schema based collection
var bsonPersonCollection = usersDatabase.GetCollection <BsonDocument>(Constants.UsersCollection);
// Find a person using a class filter
var bsonSingleFilter = Builders <BsonDocument> .Filter.Gt("salary", 2000);
var bsonPersonDeleteResult = await bsonPersonCollection.DeleteOneAsync(bsonSingleFilter);
if (bsonPersonDeleteResult.DeletedCount == 1)
{
Utils.Log("Person deleted");
}
var bsonEmptyFilter = Builders <BsonDocument> .Filter.Empty;
// delete person
var bsonFirstPersonDeleteResult = await bsonPersonCollection.DeleteOneAsync(bsonEmptyFilter);
// delete many documents
var bsonPersonsDeleteResult = await bsonPersonCollection.DeleteManyAsync(bsonSingleFilter);
if (bsonPersonsDeleteResult.DeletedCount > 1)
{
Utils.Log($"Persons {bsonPersonDeleteResult.DeletedCount} deleted");
}
#endregion
#region Shell commands
/*
* use Persons
*
* // delete a single document
* db.users.deleteOne({ _id : ObjectId("5e5ff25170dc588dd0870073")})
*
* // delete multiple documents
* db.users.deleteMany(
* { $and: [{ salary: { $gt: 1200} }, {salary: { $lt: 3500} }] }
* )
*/
#endregion
}
private async Task LogicalOperatorsSamples()
{
var database = Client.GetDatabase(Constants.SamplesDatabase);
var collection = database.GetCollection <User>(Constants.UsersCollection);
var bsonCollection = database.GetCollection <BsonDocument>(Constants.UsersCollection);
#region Prepare data
var users = RandomData.GenerateUsers(1000);
await collection.InsertManyAsync(users);
#endregion
#region Typed classes commands
#region and
// and on simple properties - all male doctors
var maleFilter = Builders <User> .Filter.Eq(u => u.Gender, Gender.Male);
var doctorFilter = Builders <User> .Filter.Eq(u => u.Profession, "Doctor");
var maleDoctorsFilter = Builders <User> .Filter.And(maleFilter, doctorFilter);
var maleDoctors = await collection.Find(maleDoctorsFilter).ToListAsync();
Utils.Log($"{maleDoctors.Count} total users are male Doctors");
//////////////////////////////////////////////////////////////////////////////////////
// and combined with other operators
// - all a) female witch are b) either teacher or nurse AND c) having salary between 2000-3200
var femaleFilter = Builders <User> .Filter.Eq(u => u.Gender, Gender.Female);
var teacherOrNurseFilter = Builders <User> .Filter
.In(u => u.Profession, new[] { "Teacher", "Nurse", "Dentist" });
var salaryFilter = Builders <User> .Filter.And(
Builders <User> .Filter.Gte(u => u.Salary, 2000),
Builders <User> .Filter.Lte(u => u.Salary, 3200));
var combinedFilter = Builders <User> .Filter.And(femaleFilter, teacherOrNurseFilter, salaryFilter);
var matchedUsers = await collection.Find(combinedFilter).ToListAsync();
Utils.Log($"{matchedUsers.Count} total users are female Teacher or Nurse or Dentist, with 2000 < salary < 3200");
#endregion
#region not
// all users that are females, hence not males
var notMaleFilter = Builders <User> .Filter.Not(
Builders <User> .Filter.Eq(u => u.Gender, Gender.Male)
);
var femaleUsers = await collection.Find(notMaleFilter).ToListAsync();
Utils.Log($"{femaleUsers.Count} users have female gender");
#endregion
#region or
// users with salary either < 1500 (too low) or > 4000 (too high)
var orSalaryFilter = Builders <User> .Filter.Or(
Builders <User> .Filter.Lt(u => u.Salary, 1500),
Builders <User> .Filter.Gt(u => u.Salary, 4000));
var lowOrHighSalaryUsers = await collection.Find(orSalaryFilter).ToListAsync();
Utils.Log($"{lowOrHighSalaryUsers.Count} users have salary either too low or too high");
#endregion
#region nor
// users with profession other than Doctor, salary other than < 4500
// should fail all conditions
var norFilter = Builders <User> .Filter.And(
Builders <User> .Filter.Not(Builders <User> .Filter.Eq(u => u.Profession, "Doctor")),
Builders <User> .Filter.Not(Builders <User> .Filter.Lt(u => u.Salary, 4500)));
var norUsers = await collection.Find(norFilter).ToListAsync();
Utils.Log($"{norUsers.Count} users aren't doctors and have salary greater than 4500");
var firstFilterToFail = Builders <User> .Filter.Eq(u => u.Profession, "Doctor");
var secondFilterToFail = Builders <User> .Filter.Lt(u => u.Salary, 4500);
var extensionNorFilter = Builders <User> .Filter.Nor(firstFilterToFail, secondFilterToFail);
var extensionUsers = await collection.Find(norFilter).ToListAsync();
#endregion
#endregion
#region BsonDocument commands
#region and
var bsonMaleFilter = Builders <BsonDocument> .Filter.Eq("gender", Gender.Male);
var bsonDoctorFilter = Builders <BsonDocument> .Filter.Eq("profession", "Doctor");
var bsonMaleDoctorsFilter = Builders <BsonDocument> .Filter.And(bsonMaleFilter, bsonDoctorFilter);
var bsonMaleDoctors = await bsonCollection.Find(bsonMaleDoctorsFilter).ToListAsync();
//////////////////////////////////////////////////////////////////////////////////////
var bsonFemaleFilter = Builders <BsonDocument> .Filter.Eq("gender", Gender.Female);
var bsonTeacherOrNurseFilter = Builders <BsonDocument> .Filter
.In("profession", new[] { "Teacher", "Nurse", "Dentist" });
var bsonSalaryFilter = Builders <BsonDocument> .Filter.And(
Builders <BsonDocument> .Filter.Gte("salary", 2000),
Builders <BsonDocument> .Filter.Lte("salary", 3200));
var bsonCombinedFilter = Builders <BsonDocument> .Filter
.And(bsonFemaleFilter, bsonTeacherOrNurseFilter, bsonSalaryFilter);
var bsonMatchedUsers = await bsonCollection.Find(bsonCombinedFilter).ToListAsync();
#endregion
#region not
// all users that are females, hence not females
var bsonNotMaleFilter = Builders <BsonDocument> .Filter.Not(
Builders <BsonDocument> .Filter.Eq("gender", Gender.Male)
);
var bsonFemaleUsers = await bsonCollection.Find(bsonNotMaleFilter).ToListAsync();
#endregion
#region or
var bsonOrSalaryFilter = Builders <BsonDocument> .Filter.Or(
Builders <BsonDocument> .Filter.Lt("salary", 1500),
Builders <BsonDocument> .Filter.Gt("salary", 4000));
var bsonLowOrHighSalaryUsers = await bsonCollection.Find(bsonOrSalaryFilter).ToListAsync();
#endregion
#region nor
var bsonNorFilter = Builders <BsonDocument> .Filter.And(
Builders <BsonDocument> .Filter.Not(Builders <BsonDocument> .Filter.Eq("profession", "Doctor")),
Builders <BsonDocument> .Filter.Not(Builders <BsonDocument> .Filter.Lt("salary", 4500)));
var bsonNorUsers = await bsonCollection.Find(bsonNorFilter).ToListAsync();
#endregion
#endregion
#region Shell commands
#if false
db.users.find({ $and:[{ profession: { $eq: "Doctor" } }, { gender: { $eq: 0 } }] })
private async Task FindDocumentsSamples()
{
var database = Client.GetDatabase(Constants.SamplesDatabase);
var collection = database.GetCollection <User>(Constants.UsersCollection);
var bsonCollection = database.GetCollection <BsonDocument>(Constants.UsersCollection);
#region Prepare data
var users = RandomData.GenerateUsers(1000);
for (int i = 0; i < users.Count; i++)
{
if (i >= 30 && i < 50)
{
users[i].Address.City = "Athens";
}
}
await collection.InsertManyAsync(users);
var sampleUser = RandomData.GenerateUsers(1).First();
sampleUser.Email = "*****@*****.**";
sampleUser.Phone = "123-456-789";
await collection.InsertOneAsync(sampleUser);
#endregion
#region Typed classes commands
// empty filter
var emptyFilter = Builders <User> .Filter.Empty;
// first user
var firstUser = await collection.Find(emptyFilter).FirstOrDefaultAsync();
// all users
var allUsers = await collection.Find(emptyFilter).ToListAsync();
// Get the first document with equality filter on a simple property
var sampleUserFilter = Builders <User> .Filter.Eq(u => u.Email, sampleUser.Email);
var dbSampleUser = await collection.Find(sampleUserFilter).FirstOrDefaultAsync();
// Find multiple documents with equality filter on a simple property
var doctorsFilter = Builders <User> .Filter.Eq(u => u.Profession, "Doctor");
var doctors = await collection.Find(doctorsFilter).ToListAsync();
// same result with .Find
// doctors = collection.Find(doctorsFilter).ToCursor();
Utils.Log($"{doctors.Count} doctors found");
// Query on an embedded field, eg. address.city
// find all users with address.city = Athens
var athensCityFilter = Builders <User> .Filter.Eq(u => u.Address.City, "Athens");
var athensUsers = await collection.Find(athensCityFilter).ToListAsync();
Utils.Log($"{athensUsers.Count} total users live in Athens");
// Query on array property
// find all users that have Basketball on their favorite sports -
// doesn't have to be the only item on the array, may have more favorite sports as well
var basketballFilter = Builders <User> .Filter.AnyEq(u => u.FavoriteSports, "Basketball");
var usersHaveBasketball = await collection.Find(basketballFilter).ToListAsync();
Utils.Log($"{usersHaveBasketball.Count} have Basketball on their favorite sports collection");
// find all users that have ONLY Soccer on their favorite sports
var onlySoccerFilter = Builders <User> .Filter
.Eq(u => u.FavoriteSports, new List <string> {
"Soccer"
});
var soccerUsers = await collection.Find(onlySoccerFilter).ToListAsync();
Utils.Log($"{soccerUsers.Count} have only Soccer on their favorite sports collection");
#endregion
#region BsonDocument commands
var bsonEmptyDocument = Builders <BsonDocument> .Filter.Empty;
var bsonFirstUser = await bsonCollection.Find(new BsonDocument()).FirstOrDefaultAsync();
var bsonAllUsers = await bsonCollection.Find(bsonEmptyDocument).ToListAsync();
var sampleBsonUserFilter = Builders <BsonDocument> .Filter.Eq("email", sampleUser.Email);
var dbBsonSampleUser = await bsonCollection.Find(sampleBsonUserFilter).FirstOrDefaultAsync();
var bsonDoctorsFilter = Builders <BsonDocument> .Filter.Eq("profession", "Doctor");
var bsonDoctors = await bsonCollection.Find(bsonDoctorsFilter).FirstOrDefaultAsync();
var bsonAthensCityFilter = Builders <BsonDocument> .Filter.Eq("address.city", "Athens");
var bsonAthensUsers = await bsonCollection.Find(bsonAthensCityFilter).ToListAsync();
var bsonBasketballFilter = Builders <BsonDocument> .Filter.AnyEq("favoriteSports", "Basketball");
var bsonUsersHaveBasketball = await bsonCollection.Find(bsonBasketballFilter).ToListAsync();
var bsonOnlySoccerFilter = Builders <BsonDocument> .Filter
.Eq("favoriteSports", new List <string>() { "Soccer" });
var bsonSoccerUsers = await bsonCollection.Find(bsonOnlySoccerFilter).ToListAsync();
#endregion
#region Shell commands
#if false
db.users.findOne({})
private async Task ProjectionSamples()
{
var personsDatabase = Client.GetDatabase(Constants.SamplesDatabase);
var collection = personsDatabase.GetCollection <User>(Constants.UsersCollection);
var usersQueryableCollection = personsDatabase.GetCollection <User>(Constants.UsersCollection).AsQueryable();
var bsonCollection = personsDatabase.GetCollection <BsonDocument>(Constants.UsersCollection);
var tripsDatabase = Client.GetDatabase(Constants.SamplesDatabase);
var travelersCollection = tripsDatabase.GetCollection <Traveler>(Constants.TravelersCollection);
#region Prepare data
await collection.InsertManyAsync(RandomData.GenerateUsers(500));
await travelersCollection.InsertManyAsync(RandomData.GenerateTravelers(500));
#endregion
#region Typed classes commands
// exclude id, return only gender and date of birth
var simpleProjection = Builders <User> .Projection
.Exclude(u => u.Id)
.Include(u => u.Gender)
.Include(u => u.DateOfBirth);
var simpleProjectionResults = await collection
.Find(Builders <User> .Filter.Empty)
.Project(simpleProjection)
.ToListAsync();
// return full name (first & last name), gender ('Male' or 'Female'), age
//var lastNameProjection = Builders<User>.Projection.Expression(u => u.FirstName + " " + u.LastName);
var customProjection = Builders <User> .Projection.Expression(u =>
new
{
fullName = $"{u.FirstName} {u.LastName}",
fullNameUpper = ToUpperCase($"{u.FirstName} {u.LastName}"),
gender = u.Gender.ToString(),
age = DateTime.Today.Year - u.DateOfBirth.Year
});
var results = await collection.Find(Builders <User> .Filter.Empty)
.Project(customProjection)
.ToListAsync();
foreach (var result in results)
{
Utils.Log(result.ToBsonDocument());
}
#endregion
#region BsonDocument commands
var bsonSimpleProjection = Builders <BsonDocument> .Projection
.Exclude("_id")
.Include("gender")
.Include("dateOfBirth");
var bsonSimpleProjectionResults = await bsonCollection
.Find(Builders <BsonDocument> .Filter.Empty)
.Project(bsonSimpleProjection)
.ToListAsync();
#endregion
#region Linq
var linqSimpleProjection =
from u in usersQueryableCollection
select new
{
fullName = u.FirstName + " " + u.LastName,
fullNameUpper = ToUpperCase($"{u.FirstName} {u.LastName}"),
gender = u.Gender == Gender.Male ? "Male" : "Female",
age = DateTime.Now.Year - u.DateOfBirth.Year
};
Utils.Log($"Query built: {linqSimpleProjection}");
var linqSimpleProjectionResults = await linqSimpleProjection.ToListAsync();
#endregion
#region Shell commands
#if false
db.users.aggregate([
private async Task UpdateDocumentsDefinitions()
{
var database = Client.GetDatabase(Constants.SamplesDatabase);
var collection = database.GetCollection <User>(Constants.UsersCollection);
var bsonCollection = database.GetCollection <BsonDocument>(Constants.UsersCollection);
#region Prepare data
await collection.InsertManyAsync(RandomData.GenerateUsers(1000));
#endregion
#region Typed classes commands
#region set
var firstUserFilter = Builders <User> .Filter.Empty;
var allusers = await collection.Find(firstUserFilter).ToListAsync();
// update a single field
var updateNameDefinition = Builders <User> .Update.Set(u => u.FirstName, "Chris");
var updateNameResult = await collection.UpdateOneAsync(firstUserFilter, updateNameDefinition);
Utils.Log($"{updateNameResult.ModifiedCount} user's name was updated");
// update multiple fields
var multiUpdateDefinition = Builders <User> .Update
.Set(u => u.Phone, "123-456-789")
.Set(u => u.Website, "https://chsakell.com")
.Set(u => u.FavoriteSports, new List <string> {
"Soccer", "Basketball"
});
var multiUpdateResult = await collection.UpdateOneAsync(firstUserFilter, multiUpdateDefinition);
Utils.Log($"Multiple user's fields were updated");
#endregion
#region inc
// can be used with negative values to decrease
var incrementSalaryDefinition = Builders <User> .Update.Inc(u => u.Salary, 450);
var incrementSalaryResult = await collection.UpdateOneAsync(firstUserFilter, incrementSalaryDefinition);
Utils.Log($"User's salary has been increased");
#endregion
// combine inc with set
var incWithSetUpdateDefinition = Builders <User>
.Update.Set(u => u.FirstName, "Chris")
.Inc(u => u.Salary, 450);
var incWithSetUpdateResult = await collection.UpdateOneAsync(firstUserFilter, incWithSetUpdateDefinition);
#region min
// preparation - set current salary to 3000
await collection.UpdateOneAsync(firstUserFilter, Builders <User> .Update.Set(u => u.Salary, 3000));
// update only if the new value is less than the current
// would not update if the new salary was > 3000
var minUpdateDefinition = Builders <User> .Update.Min(u => u.Salary, 2000);
var minUpdateResult = await collection.UpdateOneAsync(firstUserFilter, minUpdateDefinition);
Utils.Log($"{minUpdateResult.ModifiedCount} user's salary has been updated (decreased - min)");
#endregion
#region max
// preparation - set current salary to 3000
await collection.UpdateOneAsync(firstUserFilter, Builders <User> .Update.Set(u => u.Salary, 3000));
// update only if the new value is greater than the current
// would not update if the new salary was < 3000
var maxUpdateDefinition = Builders <User> .Update.Max(u => u.Salary, 3500);
var maxUpdateResult = await collection.UpdateOneAsync(firstUserFilter, maxUpdateDefinition);
Utils.Log($"{maxUpdateResult.ModifiedCount} user's salary has been updated (increased - max)");
#endregion
#region mul
// preparation - set current salary to 1000
await collection.UpdateOneAsync(firstUserFilter, Builders <User> .Update.Set(u => u.Salary, 1000));
// set salary X 2
var mulUpdateDefinition = Builders <User> .Update.Mul(u => u.Salary, 2);
var mulUpdateResult = await collection.UpdateOneAsync(firstUserFilter, mulUpdateDefinition);
Utils.Log($"{mulUpdateResult.ModifiedCount} user's salary has been doubled (mul)");
#endregion
#region unset
// remove the website field for the first user
var removeWebsiteDefinition = Builders <User> .Update.Unset(u => u.Website);
var removeWebsiteFieldUpdateResult =
await collection.UpdateOneAsync(firstUserFilter, removeWebsiteDefinition);
Utils.Log("Website field entirely removed from the first document");
#region caution
//var removeSalaryDefinition = Builders<User>.Update.Unset(u => u.Salary);
//var removeSalaryFieldUpdateResult =
// await collection.UpdateOneAsync(firstUserFilter, removeSalaryDefinition);
//var firstUser = await collection.Find(firstUserFilter).FirstOrDefaultAsync();
#endregion
#endregion
#region rename
// rename the phone field to phoneNumber for the first user
var renamePhoneDefinition = Builders <User> .Update.Rename(u => u.Phone, "phoneNumber");
var renamePhoneFieldUpdateResult =
await collection.UpdateOneAsync(firstUserFilter, renamePhoneDefinition);
Utils.Log("Phone field renamed to phone");
// Switch back to phone
await collection.UpdateOneAsync(firstUserFilter, Builders <User> .Update.Rename("phoneNumber", "phone"));
#endregion
#endregion
#region BsonDocument commands
#region set
var bsonFirstUserFilter = Builders <BsonDocument> .Filter.Empty;
// single field
var bsonUpdateNameDefinition = Builders <BsonDocument> .Update.Set("firstName", "John");
var bsonUpdateNameResult = await bsonCollection.UpdateOneAsync(bsonFirstUserFilter, bsonUpdateNameDefinition);
// update multiple fields
var bsonMultiUpdateDefinition = Builders <BsonDocument> .Update
.Set("phone", "123-456-789")
.Set("website", "https://chsakell.com")
.Set("favoriteSports", new List <string> {
"Soccer", "Basketball"
});
var bsonMultiUpdateResult = await bsonCollection.UpdateOneAsync(bsonFirstUserFilter, bsonMultiUpdateDefinition);
#endregion
#region inc
var bsonIncrementSalaryDefinition = Builders <BsonDocument> .Update.Inc("salary", 450);
var bsonIncrementSalaryResult = await bsonCollection
.UpdateOneAsync(bsonFirstUserFilter, bsonIncrementSalaryDefinition);
#endregion
// combine inc with set
var bsonIncWithSetUpdateDefinition = Builders <BsonDocument>
.Update.Set("firstName", "Chris").Inc("salary", 450);
var bsonIncWithSetUpdateResult = await bsonCollection
.UpdateOneAsync(bsonFirstUserFilter, bsonIncWithSetUpdateDefinition);
#region min
// preparation - set current salary to 3000
await bsonCollection.UpdateOneAsync(bsonFirstUserFilter,
Builders <BsonDocument> .Update.Set("salary", 3000));
// update only if the new value is less than the current
// would not update if the new salary was > 3000
var bsonMinUpdateDefinition = Builders <BsonDocument> .Update.Min("salary", 2000);
var bsonMinUpdateResult = await bsonCollection
.UpdateOneAsync(bsonFirstUserFilter, bsonMinUpdateDefinition);
#endregion
#region max
// preparation - set current salary to 3000
await bsonCollection.UpdateOneAsync(bsonFirstUserFilter, Builders <BsonDocument>
.Update.Set("salary", 3000));
// update only if the new value is greater than the current
// would not update if the new salary was < 3500
var bsonMaxUpdateDefinition = Builders <BsonDocument> .Update.Max("salary", 3500);
var bsonMaxUpdateResult = await bsonCollection
.UpdateOneAsync(bsonFirstUserFilter, bsonMaxUpdateDefinition);
#endregion
#region mul
// preparation - set current salary to 1000
await bsonCollection.UpdateOneAsync(bsonFirstUserFilter,
Builders <BsonDocument> .Update.Set("salary", 1000));
// set salary X 2
var bsonMulUpdateDefinition = Builders <BsonDocument> .Update.Mul("salary", 2);
var bsonMulUpdateResult = await bsonCollection.UpdateOneAsync(bsonFirstUserFilter, bsonMulUpdateDefinition);
#endregion
#region unset
// remove the website field for the first user
var bsonRemoveWebsiteDefinition = Builders <BsonDocument> .Update.Unset("website");
var bsonRemoveWebsiteFieldUpdateResult =
await bsonCollection.UpdateOneAsync(bsonFirstUserFilter, bsonRemoveWebsiteDefinition);
#endregion
#region rename
// rename the phone field to phoneNumber for the first user
var bsonRenamePhoneDefinition = Builders <BsonDocument> .Update.Rename("phone", "phoneNumber");
var bsonRenamePhoneFieldUpdateResult =
await bsonCollection.UpdateOneAsync(bsonFirstUserFilter, bsonRenamePhoneDefinition);
// Switch back to phone
await bsonCollection.UpdateOneAsync(bsonFirstUserFilter,
Builders <BsonDocument> .Update.Rename("phoneNumber", "phone"));
#endregion
#endregion
#region Shell commands
#if false
db.users.updateOne({}, { $set: { firstName: "Chris" } });
private async Task ComparisonOperatorsSamples()
{
var database = Client.GetDatabase(Constants.SamplesDatabase);
var collection = database.GetCollection <User>(Constants.UsersCollection);
var bsonCollection = database.GetCollection <BsonDocument>(Constants.UsersCollection);
#region Prepare data
var users = RandomData.GenerateUsers(1000);
await collection.InsertManyAsync(users);
#endregion
#region Typed classes commands
var totalUsers = await collection.CountDocumentsAsync(Builders <User> .Filter.Empty);
// Equal
// Case sensitive matters!
var equalPilotsFilter = Builders <User> .Filter.Eq(u => u.Profession, "Pilot");
var pilots = await collection.Find(equalPilotsFilter).ToListAsync();
Utils.Log($"Among {totalUsers} users, {pilots.Count} are pilots");
// Not equal
// Case sensitive matters!
var notEqualDoctorsFilter = Builders <User> .Filter.Ne(u => u.Profession, "Doctor");
var notDoctors = await collection.Find(notEqualDoctorsFilter).ToListAsync();
Utils.Log($"Among {totalUsers} users, {notDoctors.Count} aren't doctors");
// Greater than
var filterGreaterThan = Builders <User> .Filter.Gt(u => u.Salary, 3500);
var greaterThan3500 = await collection.Find(filterGreaterThan).ToListAsync();
// Greater or equal than
var filterGreaterOrEqualThan = Builders <User> .Filter.Gte(u => u.Salary, 4500);
var greaterOrEqualThan4500 = await collection.Find(filterGreaterOrEqualThan).ToListAsync();
// Less than
var filterLessThan = Builders <User> .Filter.Lt(u => u.Salary, 2500);
var lessThan2500 = await collection.Find(filterLessThan).ToListAsync();
// Greater or equal than
var filterLessOrEqualThan = Builders <User> .Filter.Lte(u => u.Salary, 1500);
var lessThanOrEqual1500 = await collection.Find(filterLessOrEqualThan).ToListAsync();
Utils.Log($"Salary Greater than 3500 total: {greaterThan3500.Count}{Environment.NewLine}" +
$"Salary Greater or equal to 4500 total: {greaterOrEqualThan4500.Count}{Environment.NewLine}" +
$"Salary Less than 2500 total: {lessThan2500.Count}{Environment.NewLine}" +
$"Salary Less than or equal to 1500 total: {lessThanOrEqual1500.Count}{Environment.NewLine}");
// In
var medicalProfessionsFilter = Builders <User> .Filter.In(u => u.Profession,
new[] { "Dentist", "Pharmacist", "Nurse" });
var medicalUsers = await collection.Find(medicalProfessionsFilter).ToListAsync();
Utils.Log($"{medicalUsers.Count} users have medical related profession");
// Not In
var nonMedicalProfessionsFilter = Builders <User> .Filter.Nin(u => u.Profession,
new[] { "Dentist", "Pharmacist", "Nurse" });
var nonMedicalUsers = await collection.Find(nonMedicalProfessionsFilter).ToListAsync();
Utils.Log($"{nonMedicalUsers.Count} users have no medical related profession");
#endregion
#region BsonDocument commands
// Equal
// Case sensitive matters!
var bsonEqualPilotsFilter = Builders <BsonDocument> .Filter.Eq("profession", "Pilot");
var bsonPilots = await bsonCollection.Find(bsonEqualPilotsFilter).ToListAsync();
// Not equal
var bsonNotEqualDoctorsFilter = Builders <BsonDocument> .Filter.Ne("profession", "Doctor");
var bsonNotDoctors = await bsonCollection.Find(bsonNotEqualDoctorsFilter).ToListAsync();
// Greater than
var bsonFilterGreaterThan = Builders <BsonDocument> .Filter.Gt("salary", 3500);
var bsonGreaterThan3500 = await bsonCollection.Find(bsonFilterGreaterThan).ToListAsync();
// Greater or equal than
var bsonFilterGreaterOrEqualThan = Builders <BsonDocument> .Filter.Gte("salary", 4500);
var bsonGreaterOrEqualThan4500 = await bsonCollection.Find(bsonFilterGreaterOrEqualThan).ToListAsync();
// Less than
var bsonFilterLessThan = Builders <BsonDocument> .Filter.Lt("salary", 2500);
var bsonLessThan2500 = await bsonCollection.Find(bsonFilterLessThan).ToListAsync();
// Greater or equal than
var bsonFilterLessOrEqualThan = Builders <BsonDocument> .Filter.Lte("salary", 1500);
var bsonLessThanOrEqual1500 = await bsonCollection.Find(bsonFilterLessOrEqualThan).ToListAsync();
// In
var bsonMedicalProfessionsFilter = Builders <BsonDocument> .Filter.In("profession",
new[] { "Dentist", "Pharmacist", "Nurse" });
var bsonMedicalUsers = await bsonCollection.Find(bsonMedicalProfessionsFilter).ToListAsync();
// Not In
var bsonNotMedicalProfessionsFilter = Builders <BsonDocument> .Filter.Nin("profession",
new[] { "Dentist", "Pharmacist", "Nurse" });
var bsonNotMedicalUsers = await bsonCollection.Find(bsonNotMedicalProfessionsFilter).ToListAsync();
#endregion
#region Shell commands
#if false
db.users.find({ salary: { $gt: 3500 } })
private async Task MatchStageSamples()
{
var personsDatabase = Client.GetDatabase(Constants.SamplesDatabase);
var travelersDatabase = Client.GetDatabase(Constants.SamplesDatabase);
var personsCollection = personsDatabase.GetCollection <User>(Constants.UsersCollection);
var personsBsonCollection = personsDatabase.GetCollection <BsonDocument>(Constants.UsersCollection);
var travelersCollection = travelersDatabase.GetCollection <Traveler>(Constants.TravelersCollection);
var travelersBsonCollection = travelersDatabase.GetCollection <BsonDocument>(Constants.TravelersCollection);
#region Prepare data
await personsCollection.InsertManyAsync(RandomData.GenerateUsers(500));
await travelersCollection.InsertManyAsync(RandomData.GenerateTravelers(500));
#endregion
#region Typed classes commands
var aggregate = personsCollection.Aggregate()
.Match(Builders <User> .Filter.Gte(u => u.Salary, 3500) &
Builders <User> .Filter.Lte(u => u.Salary, 5000));
var highSalaryUsers = await aggregate.ToListAsync();
Utils.Log($"{highSalaryUsers.Count} users found with high salary");
var visitedGreeceExactly3Times = Builders <Traveler> .Filter
.ElemMatch(t => t.VisitedCountries,
country => country.Name == "Greece" && country.TimesVisited == 3);
// match with project
var simpleProjection = Builders <Traveler> .Projection
.Include(t => t.Name)
.Include(t => t.Age)
.Include(t => t.VisitedCountries);
var greeceAggregate = travelersCollection
.Aggregate()
.Match(visitedGreeceExactly3Times)
.Project(simpleProjection);
var greeceVisited3Times = await greeceAggregate.ToListAsync();
#endregion
#region BsonDocument commands
var bsonAggregate = personsBsonCollection.Aggregate()
.Match(Builders <BsonDocument> .Filter.Gte("salary", 3500) &
Builders <BsonDocument> .Filter.Lte("salary", 5000));
var bsonHighSalaryUsers = await bsonAggregate.ToListAsync();
var bsonSimpleProjection = Builders <BsonDocument> .Projection
.Include("name")
.Include("age")
.Include("visitedCountries");
var bsonVisitedGreeceExactly3Times = Builders <BsonDocument> .Filter
.ElemMatch <BsonValue>("visitedCountries",
new BsonDocument { { "name", "Greece" }, { "timesVisited", 3 } });
var bsonGreeceAggregate = travelersBsonCollection
.Aggregate()
.Match(bsonVisitedGreeceExactly3Times)
.Project(bsonSimpleProjection);
var bsonGreeceVisited3Times = await bsonGreeceAggregate.ToListAsync();
#endregion
#region Shell commands
#if false
db.users.aggregate([
private async Task ElementOperatorsSamples()
{
var database = Client.GetDatabase(Constants.SamplesDatabase);
var usersCollection = database.GetCollection <User>(Constants.UsersCollection);
var usersBsonCollection = database.GetCollection <BsonDocument>(Constants.UsersCollection);
var productsCollection = database.GetCollection <Product>(Constants.ProductsCollection);
var productsBsonCollection = database.GetCollection <BsonDocument>(Constants.ProductsCollection);
#region Prepare data
var users = RandomData.GenerateUsers(500);
var products = RandomData.GenerateProducts(500);
await usersCollection.InsertManyAsync(users);
await productsCollection.InsertManyAsync(products);
#endregion
#region Typed classes commands
#region regex
var gmailFilter = Builders <User> .Filter.Regex(u => u.Email, new BsonRegularExpression("/gmail/"));
var gmailUsers = await usersCollection.Find(gmailFilter).ToListAsync();
Utils.Log($"{gmailUsers.Count} users found to have gmail acounts");
#endregion
#region expr
#endregion
#region text
productsCollection.Indexes.CreateOne(new CreateIndexModel <Product>
(Builders <Product> .IndexKeys.Text(p => p.Name)));
var searchFilter = Builders <Product> .Filter.Text("shirt");
var searchFilterQuery = searchFilter.Render(BsonSerializer.SerializerRegistry.GetSerializer <Product>(),
BsonSerializer.SerializerRegistry);
var shirtsProducts = await productsCollection.Find(searchFilter).ToListAsync();
Utils.Log($"There are {shirtsProducts.Count} total shirt products");
#endregion
#endregion
#region BsonDocument commands
#region regex
var bsonGmailFilter = Builders <BsonDocument> .Filter
.Regex("email", new BsonRegularExpression("/gmail/"));
var bsonGmailUsers = await usersBsonCollection.Find(bsonGmailFilter).ToListAsync();
#endregion
#region text
var bsonSearchFilter = Builders <BsonDocument> .Filter.Text("shirt");
var bsonShirtsProducts = await productsBsonCollection.Find(bsonSearchFilter).ToListAsync();
#endregion
#endregion
#region Shell commands
#if false
db.users.find({ "email" : { $regex: / gmail / } })
#endif
#endregion
}
private async Task InsertSamples()
{
var database = Client.GetDatabase(Constants.SamplesDatabase);
#region Typed classes commands
// Will create the users collection on the fly if it doesn't exists
var personsCollection = database.GetCollection <User>(Constants.UsersCollection);
User appPerson = RandomData.GenerateUsers(1).First();
// Insert one document
await personsCollection.InsertOneAsync(appPerson);
// Insert multiple documents
var persons = RandomData.GenerateUsers(10);
await personsCollection.InsertManyAsync(persons);
#endregion
#region BsonDocument commands
var personsBsonCollection = database.GetCollection <BsonDocument>(Constants.UsersCollection);
var bsonPerson = new BsonDocument
{
{ "gender", 1 },
{ "firstName", "Johh" },
{ "lastName", "Doe" },
{ "userName", "Kimberly12" },
{ "avatar", "https://s3.amazonaws.com/uifaces/faces/twitter/benefritz/128.jpg" },
{ "email", "*****@*****.**" },
{ "dateOfBirth", new BsonDateTime(DateTime.Now.AddYears(-25)) },
{ "address", new BsonDocument
{
{ "street", "113 Al Points" },
{ "suite", "Apt. 697" },
{ "city", "South Murrayshire" },
{ "state", "South Dakota" },
{ "zipCode", "35038" },
{
"geo", new BsonDocument()
{
{ "lat", 87.333 },
{ "lng", -116.99 }
}
}
} },
{ "phone", "392-248-7338 x083" },
{ "website", "terry.biz" },
{
"company", new BsonDocument()
{
{ "name", "Bode - Hills" },
{ "catchPhrase", "Total composite service-desk" },
{ "bs", "morph customized bandwidth" }
}
},
{ "salary", 1641 },
{ "monthlyExpenses", 3009 },
{ "favoriteSports", new BsonArray {
"Basketball", "MMA"
} },
{ "profession", "Doctor" }
};
await personsBsonCollection.InsertOneAsync(bsonPerson);
var bsonUser = BsonDocument.Parse(@"{
'gender' : 1,
'firstName' : 'Kimberly',
'lastName' : 'Ernser',
'userName' : 'Kimberly12',
'avatar' : 'https://s3.amazonaws.com/uifaces/faces/twitter/benefritz/128.jpg',
'email' : '*****@*****.**',
'dateOfBirth' : ISODate('1996-06-10T23:55:56.029+03:00'),
'address' : {
'street' : '113 Al Points',
'suite' : 'Apt. 697',
'city' : 'South Murrayshire',
'state' : 'South Dakota',
'zipCode' : '35038',
'geo' : {
'lat' : 87.4034,
'lng' : -116.5628
}
},
'phone' : '392-248-7338 x083',
'website' : 'terry.biz',
'company' : {
'name' : 'Bode - Hills',
'catchPhrase' : 'Total composite service-desk',
'bs' : 'morph customized bandwidth'
},
'salary' : 1641,
'monthlyExpenses' : 3009,
'favoriteSports' : [
'Basketball',
'MMA',
'Volleyball',
'Ice Hockey',
'Water Polo',
'Moto GP',
'Beach Volleyball'
],
'profession' : 'Photographer'
}");
await personsBsonCollection.InsertOneAsync(bsonUser);
await personsBsonCollection.InsertOneAsync(appPerson.ToBsonDocument());
#endregion
#region Shell commands
/*
* use Persons
* db.users.insertOne({
* 'firstName': 'Lee',
* 'lastName': 'Brown',
* 'userName': '******',
* 'avatar': 'https://s3.amazonaws.com/uifaces/faces/twitter/ccinojasso1/128.jpg',
* 'email': '*****@*****.**',
* 'dateOfBirth': '1984-01-16T21:31:27.87666',
* 'address': {
* 'street': '2552 Bernard Rapid',
* 'suite': 'Suite 199',
* 'city': 'New Haskell side',
* 'zipCode': '78425-0411',
* 'geo': {
* 'lat': -35.8154,
* 'lng': -140.2044
* }
* },
* 'phone': '1-500-790-8836 x5069',
* 'website': 'javier.biz',
* 'company': {
* 'name': 'Kuphal and Sons',
* 'catchPhrase': 'Organic even-keeled monitoring',
* 'ns': 'open-source brand e-business'
* },
* 'salary': NumberDecimal(3000)
* })
*/
#endregion
}
private async Task UpdateDocumentsDefinitions()
{
var database = Client.GetDatabase(Constants.SamplesDatabase);
var usersCollection = database.GetCollection <User>(Constants.UsersCollection);
var usersBsonCollection = database.GetCollection <BsonDocument>(Constants.UsersCollection);
var socialNetworkCollection = database.GetCollection <SocialAccount>(Constants.SocialNetworkCollection);
var bsonSocialNetworkBsonCollection = database.GetCollection <BsonDocument>(Constants.SocialNetworkCollection);
#region Prepare data
await usersCollection.InsertManyAsync(RandomData.GenerateUsers(1000));
#endregion
#region Typed classes commands
#region Replace
// replace the first document entirely
// requires [BsonIgnoreIfDefault] if id not available
var newUser = RandomData.GenerateUsers(1).First();
// newUser.Id = ObjectId.GenerateNewId(); this would cause an exception
newUser.FirstName = "Chris";
newUser.LastName = "Sakellarios";
newUser.Website = "https://github.com/chsakell";
var replaceOneResult = await usersCollection.ReplaceOneAsync(Builders <User> .Filter.Empty, newUser);
Utils.Log($"First user document has been replaced with new user");
// if id is available then set it on the new doc before replacing the old one
var firstDbUser = await usersCollection.Find(Builders <User> .Filter.Empty).FirstOrDefaultAsync();
newUser.Id = firstDbUser.Id;
newUser.Website = "https://chsakell.com";
var firstUser = await usersCollection.FindOneAndReplaceAsync(
Builders <User> .Filter.Eq(u => u.Id, firstDbUser.Id), newUser,
new FindOneAndReplaceOptions <User> {
ReturnDocument = ReturnDocument.After
});
// move properties
var friends = new List <string> {
"John", "Maria", "Catherine"
};
var blocked = new List <string> {
"Jake", "Helen"
};
var username = "******";
var socialAccountBefore = new BsonDocument()
{
{ "username", username },
{ "friends", new BsonArray(friends) },
{ "blocked", new BsonArray(blocked) }
};
await bsonSocialNetworkBsonCollection.InsertOneAsync(socialAccountBefore);
// replace and move properties...
var socialAccountAfter = new SocialAccount
{
Username = username,
RelationShips = new RelationShips
{
Friends = friends,
Blocked = blocked
}
};
await socialNetworkCollection
.ReplaceOneAsync(Builders <SocialAccount> .Filter
.Eq(ac => ac.Username, username), socialAccountAfter);
#endregion
#region upsert
// update a document but if not found then insert it
var microsoftCeo = RandomData.GenerateUsers(1).First();
microsoftCeo.FirstName = "Satya";
microsoftCeo.LastName = "Nadella";
microsoftCeo.Company.Name = "Microsoft";
// returns null without upsert true
var satyaNadellaFirstAttemptResult = await usersCollection
.FindOneAndReplaceAsync <User>(u => u.Company.Name == "Microsoft", microsoftCeo);
var addOrReplaceSatyaNadellaUser = await usersCollection
.FindOneAndReplaceAsync <User>(u => u.Company.Name == "Microsoft",
microsoftCeo, new FindOneAndReplaceOptions <User>()
{
IsUpsert = true,
ReturnDocument = ReturnDocument.After
});
var addOrReplaceSatyaNadellaResult = await usersCollection
.ReplaceOneAsync <User>(u => u.Company.Name == "Microsoft Corp",
microsoftCeo, new ReplaceOptions()
{
IsUpsert = true
});
#endregion
#endregion
#region BsonDocument commands
newUser.FirstName = "Christos";
newUser.LastName = "Sakellarios";
newUser.Website = "https://github.com/chsakell";
var bsonReplaceOneResult = await usersBsonCollection
.ReplaceOneAsync(new BsonDocument(), newUser.ToBsonDocument());
var bsonAddOrReplaceSatyaNadellaUser = await usersBsonCollection
.FindOneAndReplaceAsync(
Builders <BsonDocument> .Filter.Eq("company.name", "Microsoft Corp"),
microsoftCeo.ToBsonDocument(),
new FindOneAndReplaceOptions <BsonDocument>()
{
IsUpsert = true,
ReturnDocument = ReturnDocument.After
});
var bsonFirstUser = await usersBsonCollection.FindOneAndReplaceAsync(
Builders <BsonDocument> .Filter.Eq("_id", firstDbUser.Id),
newUser.ToBsonDocument(),
new FindOneAndReplaceOptions <BsonDocument>
{
ReturnDocument = ReturnDocument.After
});
#endregion
#region Shell commands
#if false
db.users.replaceOne({},
private async Task ReadSamples()
{
var database = Client.GetDatabase(Constants.SamplesDatabase);
#region Prepare data
// Will create the users collection on the fly if it doesn't exists
var personsCollection = database.GetCollection <User>(Constants.UsersCollection);
User appPerson = RandomData.GenerateUsers(1).First();
// Insert one document
await personsCollection.InsertOneAsync(appPerson);
// Insert multiple documents
var persons = RandomData.GenerateUsers(30);
await personsCollection.InsertManyAsync(persons);
#endregion
#region Typed classes commands
// Find a person using a class filter
var personFilter = Builders <User> .Filter.Eq(person => person.Id, appPerson.Id);
var personFindResult = await personsCollection.Find(personFilter).FirstOrDefaultAsync();
Utils.Log(personFindResult.ToBsonDocument(), "Document Find with filter");
// Find multiple documents using a filter
var femaleGenderFilter = Builders <User> .Filter.Eq(person => person.Gender, Gender.Female);
var females = await personsCollection.Find(femaleGenderFilter).ToListAsync();
Utils.Log($"Found {females.Count} female persons");
#endregion
#region BsonDocument commands
// we need to get the BsonDocument schema based collection
var bsonPersonCollection = database.GetCollection <BsonDocument>(Constants.UsersCollection);
// Create a bson filter
var bsonPersonFilter = Builders <BsonDocument> .Filter.Eq("_id", appPerson.Id);
// Find a person using a class filter
var bsonPersonFindResult = await bsonPersonCollection.Find(bsonPersonFilter).FirstOrDefaultAsync();
bsonPersonFindResult = await bsonPersonCollection.Find(new BsonDocument("_id", appPerson.Id)).FirstOrDefaultAsync();
Utils.Log(bsonPersonFindResult);
var bsonFemaleGenderFilter = Builders <BsonDocument> .Filter.Eq("gender", Gender.Female);
var bsonFemales = await bsonPersonCollection.Find(bsonFemaleGenderFilter).ToListAsync();
#endregion
#region Shell commands
/*
* use Persons
*
* // find a single document
* db.users.findOne(
* {
* "_id": ObjectId("5e5d11fe152a428290f30245")
* })
*
* // find multiple documents
* db.users.find(
* {
* "gender": 1
* })
*/
#endregion
}
private async Task LimitSkipSamples()
{
var personsDatabase = Client.GetDatabase(Constants.SamplesDatabase);
var usersCollection = personsDatabase.GetCollection <User>(Constants.UsersCollection);
var usersQueryableCollection = personsDatabase.GetCollection <User>(Constants.UsersCollection).AsQueryable();
var usersBsonCollection = personsDatabase.GetCollection <BsonDocument>(Constants.UsersCollection);
#region Prepare data
await usersCollection.InsertManyAsync(RandomData.GenerateUsers(100));
var skipSize = 3;
var limitSize = 3;
#endregion
#region Typed
#region Top Level
// In find order doesn't matter but in pipelines it does!
// Order users by their birth date, older persons first
var topLevelProjection = Builders <User> .Projection
.Exclude(u => u.Id)
.Include(u => u.UserName)
.Include(u => u.DateOfBirth);
var topLevelProjectionResults = await usersCollection.Find(Builders <User> .Filter.Empty)
.Project(topLevelProjection)
.SortBy(u => u.DateOfBirth)
.Skip(skipSize)
.Limit(limitSize)
.ToListAsync();
foreach (var topLevelProjectionResult in topLevelProjectionResults)
{
Utils.Log(topLevelProjectionResult.ToJson());
}
var linqTopLevelResults = await usersQueryableCollection
.Select(u => new { u.UserName, u.DateOfBirth })
.OrderBy(u => u.DateOfBirth)
.Skip(skipSize)
.Take(limitSize)
.ToListAsync();
#endregion
#endregion
#region BsonDocument commands
var bsonTopLevelProjection = Builders <BsonDocument> .Projection
.Exclude("_id")
.Include("userName")
.Include("dateOfBirth");
var bsonTopLevelProjectionResults = await usersBsonCollection.Find(Builders <BsonDocument> .Filter.Empty)
.Project(bsonTopLevelProjection)
.SortBy(doc => doc["dateOfBirth"])
.Skip(skipSize)
.Limit(limitSize)
.ToListAsync();
#endregion
#region Shell commands
#if false
db.users.aggregate([
private async Task UpdateSamples()
{
var usersDatabase = Client.GetDatabase(Constants.SamplesDatabase);
#region Prepare data
// Will create the users collection on the fly if it doesn't exists
var personsCollection = usersDatabase.GetCollection <User>(Constants.UsersCollection);
User appPerson = RandomData.GenerateUsers(1).First();
// Insert one document
await personsCollection.InsertOneAsync(appPerson);
// Insert multiple documents
var persons = RandomData.GenerateUsers(30);
await personsCollection.InsertManyAsync(persons);
#endregion
#region Typed classes commands
// Find a person using a class filter
var filter = Builders <User> .Filter.Eq(person => person.Id, appPerson.Id);
// update person
var update = Builders <User> .Update.Set(person => person.Phone, "123-456-789");
var personUpdateResult = await personsCollection.UpdateOneAsync(filter, update);
if (personUpdateResult.MatchedCount == 1 && personUpdateResult.ModifiedCount == 1)
{
Utils.Log($"Document {appPerson.Id} Updated");
}
// Find multiple documents having 1200 < salary < 3500
var salaryFilter = Builders <User> .Filter
.And(
Builders <User> .Filter.Gt(person => person.Salary, 1200),
Builders <User> .Filter.Lt(person => person.Salary, 3500)
);
var totalPersons = await personsCollection.Find(salaryFilter).CountDocumentsAsync();
var updateDefinition =
Builders <User> .Update.Set(person => person.Salary, 4000);
var updateResult = await personsCollection.UpdateManyAsync(salaryFilter, updateDefinition);
if (updateResult.MatchedCount.Equals(totalPersons))
{
Utils.Log($"Salary has been updated for {totalPersons}");
}
#endregion
#region BsonDocument commands
// we need to get the BsonDocument schema based collection
var bsonPersonCollection = usersDatabase.GetCollection <BsonDocument>(Constants.UsersCollection);
// Find a person using a class filter
var bsonSingleFilter = Builders <BsonDocument> .Filter.Eq("_id", appPerson.Id);
var bsonUpdate = Builders <BsonDocument> .Update.Set("phone", "123-456-678");
var bsonPersonUpdateResult = await bsonPersonCollection.UpdateOneAsync(bsonSingleFilter, bsonUpdate);
if (bsonPersonUpdateResult.MatchedCount == 1 && bsonPersonUpdateResult.ModifiedCount == 1)
{
Utils.Log("Person updated");
}
var bsonSalaryFilter = Builders <BsonDocument> .Filter
.And(
Builders <BsonDocument> .Filter.Gt("salary", 1200),
Builders <BsonDocument> .Filter.Lt("salary", 3500)
);
var bsonUpdateDefinition =
Builders <BsonDocument> .Update.Set("salary", 4000);
var bsonUpdateResult = await bsonPersonCollection.UpdateManyAsync(bsonSalaryFilter, bsonUpdateDefinition);
#endregion
#region Shell commands
/*
* use Persons
*
* // update a single document
* db.users.updateOne({ _id: ObjectId("5e8a35e2cc20587f34f0cc48") }, { $set: { phone: "123-456-789" } })
*
* // update multiple documents
* db.users.updateMany(
* { $and: [{ salary: { $gt: 1200} }, {salary: { $lt: 3500} }] },
* { $set: { salary: 4000 } }
* )
*
*/
#endregion
}
private async Task GroupStageSamples()
{
var database = Client.GetDatabase(Constants.SamplesDatabase);
var collection = database.GetCollection <User>(Constants.UsersCollection);
var bsonCollection = database.GetCollection <BsonDocument>(Constants.UsersCollection);
#region Prepare data
await collection.InsertManyAsync(RandomData.GenerateUsers(1000));
#endregion
#region Typed classes commands
#region group on single field
// group by profession
var singleFieldAggregate = collection.Aggregate()
.Group(u => u.Profession,
ac => new { profession = ac.Key, total = ac.Sum(u => 1) });
var groupedProfessions = await singleFieldAggregate.ToListAsync();
Utils.Log("Grouped by profession:");
foreach (var group in groupedProfessions)
{
Utils.Log($"{group.profession}: {group.total}");
}
#endregion
#region group by embedded document field
// group by address state and sorted
var embeddedDocFieldAggregate = collection.Aggregate()
.Group(u => u.Address.State,
ac => new { state = ac.Key, total = ac.Sum(u => 1) })
.SortBy(group => group.total); // ASC
var groupedPerCountry = await embeddedDocFieldAggregate.ToListAsync();
Utils.Log("Grouped by address state sorted:");
foreach (var group in groupedPerCountry)
{
Utils.Log($"{group.state}: {group.total}");
}
#endregion
#endregion
#region excercices
// a) find users with 1500 < 3000 salary,
// b) group by gender & display average monthly expenses
// c) sort in descending order on avg monthly expenses
// truncation resulted in data loss => https://jira.mongodb.org/browse/CSHARP-2399
var excercice1Aggregate = collection.Aggregate()
.Match(Builders <User> .Filter.Gte(u => u.Salary, 1500) &
Builders <User> .Filter.Lte(u => u.Salary, 3000))
.Group(u => u.Gender,
ac => new
{
gender = ac.Key,
averageMonthlyExpenses = ac.Average(u => u.MonthlyExpenses),
total = ac.Sum(u => 1)
})
.Project(group => new
{
Gender = group.gender == 0 ? "Male" : "Female",
AverageMonthlyExpenses = group.averageMonthlyExpenses,
Total = group.total
})
.SortByDescending(group => group.AverageMonthlyExpenses);
var excercice1Result = await excercice1Aggregate.ToListAsync();
Utils.Log("Grouped by gender with average monthly expenses");
var linqQuery = collection.AsQueryable()
.Where(u => u.Salary > 1500 && u.Salary < 3000)
.GroupBy(u => u.Gender)
.Select(ac => new
{
gender = ac.Key,
averageMonthlyExpenses = Math.Ceiling(ac.Average(u => u.MonthlyExpenses)),
total = ac.Sum(u => 1)
})
.OrderBy(group => group.total);
var excercice1LinqResult = linqQuery.ToList();
foreach (var group in excercice1LinqResult)
{
Utils.Log($"{group.gender}: total - {group.total}, average monthly expenses - {group.averageMonthlyExpenses}");
}
// count births by year
var excercice2Aggregate = collection.Aggregate()
.Group(u => u.DateOfBirth.Year,
ac => new
{
year = ac.Key,
total = ac.Sum(u => 1)
})
.SortByDescending(group => group.year);
var excercice2AggregateResult = await excercice2Aggregate.ToListAsync();
#endregion
#region Shell commands
#if false
db.users.aggregate([