public static List <UpcomingScheme> GetDocuments(MongoClient client, string databaseName, string collectionName)
{
List <UpcomingScheme> schemes = new List <UpcomingScheme>();
IMongoCollection <UpcomingScheme> upcomingCollection = ConnectDataBase(client, databaseName, collectionName);
IAggregateFluent <UpcomingScheme> aggregateObject = upcomingCollection.Aggregate();
schemes = aggregateObject.ToList();
AlConsole.WriteLine(DB_INFO_C, $"Requested {databaseName, MaxIndex} | {collectionName, MaxIndex} |");
return(schemes);
}
private List <FunctionRankResult> GetResultAfterQueryExecution(IAggregateFluent <BsonDocument> finalRank)
{
List <FunctionRankResult> result = new List <FunctionRankResult>();
if (finalRank.Any())
{
var resultList = finalRank.ToList();
if (resultList != null)
{
result = BsonSerializer.Deserialize <List <FunctionRankResult> >(resultList.ToJson());
}
}
return(result);
}
/// <summary>
/// Get the ten less visited destinations per day
/// </summary>
/// <param name="month"></param>
/// <returns></returns>
public List <BsonDocument> SecondQuery(int day)
{
IAggregateFluent <BsonDocument> aggregate = _collection.Aggregate()
.Match(new BsonDocument {
{ "DayofMonth", day.ToString() }
})
.Group(new BsonDocument {
{ "_id", "$DestCityName" }, { "count", new BsonDocument("$sum", 1) }
})
.Sort(new BsonDocument {
{ "count", 1 }
})
.Limit(10);
return(aggregate.ToList());
}
/// <summary>
/// Gets the number of elements in the database
/// </summary>
/// <returns></returns>
public List <BsonDocument> CountLines()
{
IAggregateFluent <BsonDocument> aggregate = _collection.Aggregate()
.Group(new BsonDocument {
{ "_id", "$token" }, { "count", new BsonDocument("$sum", 1) }
})
.Sort(new BsonDocument {
{ "count", -1 }
})
.Limit(10);
List <BsonDocument> results = aggregate.ToList();
foreach (BsonDocument obj in results)
{
Console.WriteLine(obj.ToString());
}
return(results);
}
public List <object> SkipTake <T>(IAggregateFluent <T> result, int skip, int take, out long total)
{
if (take > 0)
{
//var sortStage = result.Stages.FirstOrDefault(x => x.OperatorName == "$sort");
//var stages = result.Stages.Where(x => x.OperatorName != "$sort");
//var resultForTotal = new PipelineStagePipelineDefinition<TDocument, T>(stages);
total = result.Count().FirstOrDefault()?.Count ?? 0;
result = result.Skip(skip).Limit(take);
}
else
{
total = 0;
}
var list = result.ToList();
return(list.Cast <object>().ToList());
}
/// <summary>
///
/// </summary>
/// <typeparam name="TResult"></typeparam>
/// <typeparam name="TID"></typeparam>
/// <param name="filter"></param>
/// <param name="group"></param>
/// <param name="sortExp"></param>
/// <param name="sortType"></param>
/// <param name="limit"></param>
/// <param name="skip"></param>
/// <param name="readPreference"></param>
/// <returns></returns>
public List <TResult> Aggregate <TResult, TID>(FilterDefinition <TEntity> filter, ProjectionDefinition <TEntity, TResult> group, Expression <Func <TEntity, object> > sortExp = null, SortType sortType = SortType.Ascending, int limit = 0, int skip = 0, ReadPreference readPreference = null)
{
if (filter == null)
{
filter = Builders <TEntity> .Filter.Empty;
}
IAggregateFluent <TEntity> aggregateFluent = base.CreateAggregate(filter, base.CreateSortDefinition <TEntity>(sortExp, sortType), readPreference);
IAggregateFluent <TResult> aggregateFluent2 = aggregateFluent.Group <TResult>(group);
if (skip > 0)
{
aggregateFluent2 = aggregateFluent2.Skip(skip);
}
if (limit > 0)
{
aggregateFluent2 = aggregateFluent2.Limit(limit);
}
return(aggregateFluent2.ToList(default(CancellationToken)));
}
private List <Object> GetResultAfterQueryExecution(IAggregateFluent <BsonDocument> finalQuery)
{
var result = new List <Object>();
try
{
if (finalQuery.Any())
{
var resultList = finalQuery.ToList();
foreach (var i in resultList)
{
result.Add(BsonSerializer.Deserialize <object>(i));
}
}
}
catch (Exception ex)
{
}
return(result);
}
public void ShouldFetchCandidateListWhenSectorWiseSearch()
{
IMongoDatabase database = GetMongoDatabase();
IMongoCollection <BsonDocument> candidateCollection = database.GetCollection <BsonDocument>("Candidates");
IMongoCollection <BsonDocument> companyCollection = database.GetCollection <BsonDocument>("Companies");
var sectors = new[] { "java" };
IAggregateFluent <BsonDocument> candidateAgg = candidateCollection.Aggregate();
var let = new BsonDocument("compId", "$PreferredCompanies");
var operands = new BsonArray();
operands.Add("$$compId").Add("$_id");
var expression = new BsonDocument("$expr", new BsonDocument("$eq", operands));
PipelineDefinition <BsonDocument, BsonDocument> pipeline = PipelineDefinition <BsonDocument, BsonDocument> .Create(new BsonDocument("$match", expression));
candidateAgg = candidateAgg.Lookup(companyCollection, let, pipeline, "Array");
candidateAgg = candidateAgg.Unwind("Array");
FilterDefinition <BsonDocument> sectorFilters = Builders <BsonDocument> .Filter.In("Array.sectors", sectors);
candidateAgg = candidateAgg.Match(sectorFilters);
var fields = new BsonDocument
{
{ "_id", "$_id" },
{ "CompanyId", new BsonDocument {
{ "$first", "$CompanyId" }
} }
};
candidateAgg = candidateAgg.Group(fields);
IEnumerable <BsonDocument> resultList = candidateAgg.ToList();
Assert.NotNull(resultList);
}
/// <summary>
///
/// </summary>
/// <typeparam name="T"></typeparam>
/// <param name="collection"></param>
/// <param name="filter"></param>
/// <param name="projection"></param>
private void Apply <T>(IMongoCollection <T> collection, FilterDefinition <T> filter, ProjectionDefinition <T> projection)
{
filter = CreateFilters <T>(Filter, filter);
if (IsAggregate)
{
var sortB = Builders <T> .Sort;
SortDefinition <T> sort = null;
foreach (var item in Order)
{
switch (item.Direction.ToString())
{
case "-":
{
if (sort == null)
{
sort = sortB.Descending(item.Property);
}
else
{
sort = sort.Descending(item.Property);
}
break;
}
case "+":
{
if (sort == null)
{
sort = sortB.Ascending(item.Property);
}
else
{
sort = sort.Ascending(item.Property);
}
break;
}
}
}
var Group = BsonDocumentWrapper.Parse(JsonConvert.SerializeObject(GroupBy));
IAggregateFluent <T> query = null;
var options = new AggregateOptions();
if (sort != null)
{
query = collection.Aggregate().Match(filter).Sort(sort).Group <T>(Group).Project <T>(BsonDocumentWrapper.Parse("{'id':'$_id','count':'$count'}"));
}
else
{
query = collection.Aggregate().Match(filter).Group <T>(Group).Project <T>(BsonDocumentWrapper.Parse("{'id':'$_id','count':'$count'}"));
}
Data = query.ToList <T>();
}
else
{
IFindFluent <T, T> query = null;
if (filter != null)
{
query = collection.Find(filter);
}
else
{
query = collection.Find(x => true);
}
if (projection != null)
{
query = query.Project <T>(projection);
}
var sortB = Builders <T> .Sort;
SortDefinition <T> sort = null;
foreach (var item in Order)
{
switch (item.Direction.ToString())
{
case "-":
{
if (sort == null)
{
sort = sortB.Descending(item.Property);
}
else
{
sort = sort.Descending(item.Property);
}
break;
}
case "+":
{
if (sort == null)
{
sort = sortB.Ascending(item.Property);
}
else
{
sort = sort.Ascending(item.Property);
}
break;
}
}
}
if (sort != null)
{
query.Sort(sort);
}
PageSize = PageSize ?? 1;
RecordCount = query.Count();
if (PageSize != int.MaxValue)
{
PageCount = (RecordCount / PageSize);
PageCount += (PageCount < ((float)RecordCount / (float)PageSize)) ? 1 : 0;
Data = query.Skip((PageIndex - 1) * PageSize).Limit(PageSize).ToList <T>();
}
else
{
PageCount = 1;
Data = query.ToList <T>();
}
}
}
