public Person Map(EntityMapContext context)
{
Person person = null;
foreach (var obj in context.Items)
{
switch (obj)
{
case Person p:
person = p;
break;
case Address address:
person.Address = address;
break;
case City city:
person.Address.City = city;
break;
case Country country:
person.Address.City.Country = country;
break;
}
}
return(person);
}
public override Company Map(EntityMapContext context)
{
// NOTE: Order is very important here. We must map the objects in
// the same order they were queried in the QueryBuilder.
var company = Deduplicate(context.Start <Company>());
var email = context.Next <Email>("emails");
var phone = context.Next <Phone>("phones");
if (company != null)
{
if (email != null &&
// Eliminate duplicates
!company.Emails.Any(e => e.Address == email.Address))
{
company.Emails.Add(email);
}
if (phone != null &&
// Eliminate duplicates
!company.Phones.Any(p => p.Number == phone.Number))
{
company.Phones.Add(phone);
}
}
return(company);
}
public override Person Map(EntityMapContext context)
{
// NOTE: Order is very important here. We must map the objects in
// the same order they were queried in the QueryBuilder.
var person = context.Start <Person>();
var company = context.Next <Company>("companies", companyEntityMapper);
var email = context.Next <Email>("emails");
var phone = context.Next <Phone>("phones");
var supervisor = context.Next <Person>("supervisor", personEntityMapper);
var careerCounselor = context.Next <Person>("careerCounselor", personEntityMapper);
if (person != null)
{
if (email != null &&
// Eliminate duplicates
!person.Emails.Any(e => e.Address == email.Address))
{
person.Emails.Add(email);
}
if (phone != null &&
// Eliminate duplicates
!person.Phones.Any(p => p.Number == phone.Number))
{
person.Phones.Add(phone);
}
person.Supervisor = supervisor;
person.CareerCounselor = careerCounselor;
}
return(person);
}
public override Person Map(EntityMapContext context)
{
// Avoid creating the mappers until they're used
// NOTE: this avoids an infinite loop (had these been created in the ctor)
if (companyEntityMapper == null)
{
companyEntityMapper = new CompanyEntityMapper();
}
if (personEntityMapper == null)
{
personEntityMapper = new PersonEntityMapper();
}
// NOTE: Order is very important here. We must map the objects in
// the same order they were queried in the QueryBuilder.
// Start with the person, and deduplicate
var person = Deduplicate(context.Start <Person>());
var company = context.Next <Company>("companies", companyEntityMapper);
var email = context.Next <Email>("emails");
var phone = context.Next <Phone>("phones");
var supervisor = context.Next <Person>("supervisor", personEntityMapper);
var careerCounselor = context.Next <Person>("careerCounselor", personEntityMapper);
if (person != null)
{
if (company != null &&
// Eliminate duplicates
!person.Companies.Any(c => c.Id == company.Id))
{
person.Companies.Add(company);
}
if (email != null &&
// Eliminate duplicates
!person.Emails.Any(e => e.Address == email.Address))
{
person.Emails.Add(email);
}
if (phone != null &&
// Eliminate duplicates
!person.Phones.Any(p => p.Number == phone.Number))
{
person.Phones.Add(phone);
}
person.Supervisor = person.Supervisor ?? supervisor;
person.CareerCounselor = person.CareerCounselor ?? careerCounselor;
}
return(person);
}
public void EntityMapSucceeds()
{
var person1 = new Person
{
FirstName = "Doug",
Id = 2,
LastName = "Day",
MergedToPersonId = 2,
};
var person2 = new Person
{
FirstName = "Douglas",
Id = 2,
LastName = "Day",
MergedToPersonId = 2,
};
var email1 = new Email
{
Address = "*****@*****.**",
Id = 2,
};
var email2 = new Email
{
Address = "*****@*****.**",
Id = 3,
};
var phone = new Phone
{
Id = 1,
Number = "8011234567",
Type = PhoneType.Mobile,
};
var splitOn = new[]
{
typeof(Person),
typeof(Email),
typeof(Phone),
};
var personEntityMapper = new PersonEntityMapper();
var graphql = @"
{
query {
firstName
lastName
id
emails {
id
address
}
phones {
id
number
type
}
}
}";
var selectionSet = fixture.BuildGraphQLSelection(graphql);
var context1 = new EntityMapContext
{
Items = new object[]
{
person1,
email1,
phone,
},
SelectionSet = selectionSet,
SplitOn = splitOn,
};
person1 = personEntityMapper.Map(context1);
Assert.Equal(3, context1.MappedCount);
Assert.Equal(2, person1.Id);
Assert.Equal("Doug", person1.FirstName);
Assert.Equal(1, person1.Emails.Count);
Assert.Equal(1, person1.Phones.Count);
var context2 = new EntityMapContext
{
Items = new object[]
{
person2,
email2,
null,
},
SelectionSet = selectionSet,
SplitOn = splitOn,
};
person2 = personEntityMapper.Map(context2);
Assert.Equal(3, context2.MappedCount);
// The same reference should have been returned
Assert.Same(person1, person2);
// A 2nd email was added to person
Assert.Equal(2, person1.Emails.Count);
}
public void EntityMapSucceeds()
{
var person1 = new Person
{
FirstName = "Doug",
Id = 2,
LastName = "Day",
};
var person2 = new Person
{
FirstName = "Douglas",
Id = 2,
LastName = "Day",
};
var email1 = new Email
{
Address = "*****@*****.**",
Id = 2,
};
var email2 = new Email
{
Address = "*****@*****.**",
Id = 3,
};
var phone = new Phone
{
Id = 1,
Number = "8011234567",
Type = PhoneType.Mobile,
};
var splitOn = new[]
{
typeof(Person),
typeof(Email),
typeof(Phone),
};
var deduplicatingPersonMapper = new DeduplicatingEntityMapper <Person>
{
Mapper = new PersonEntityMapper(),
PrimaryKey = p => p.Id,
};
var graphql = @"
{
query {
firstName
lastName
id
emails {
id
address
}
phones {
id
number
type
}
}
}";
var selectionSet = fixture.BuildGraphQLSelection(graphql);
var context1 = new EntityMapContext
{
Items = new object[]
{
person1,
email1,
phone,
},
SelectionSet = selectionSet,
SplitOn = splitOn,
};
person1 = deduplicatingPersonMapper.Map(context1);
Assert.Equal(3, context1.MappedCount);
Assert.Equal(2, person1.Id);
Assert.Equal("Doug", person1.FirstName);
Assert.Equal(1, person1.Emails.Count);
Assert.Equal(1, person1.Phones.Count);
var context2 = new EntityMapContext
{
Items = new object[]
{
person2,
email2,
null,
},
SelectionSet = selectionSet,
SplitOn = splitOn,
};
person2 = deduplicatingPersonMapper.Map(context2);
Assert.Equal(3, context2.MappedCount);
// Duplicate is detected
Assert.Null(person2);
// 2nd email added to person
Assert.Equal(2, person1.Id);
Assert.Equal("Doug", person1.FirstName);
Assert.Equal(2, person1.Emails.Count);
}
