CODEWITHSUNDEEP
c#linqentity-frameworkincludelinq-to-entities
Tim Blackwell
Tim Blackwell

Reputation: 729

Linq include children from collection

Using the include method does not include the children of a collection.

var abuseCaseQuery =
  from @event in 
    context.AbuseEvents.Include("AbuseCase.AbuseCaseStatus.Status")
  select new
  {
    @event.SecurityGroupId,
    @event.AbuseCaseId,
    @event.AbuseCase.AbuseCaseStatus
  }
;

var abuseCases = abuseCaseQuery.ToList();

The abuseCases List contains all the AbuseCasesStatus and the StatusId but the Status object is null.

edmx:

edmx

How can I populate the Status navigation property?

Upvotes: 3

Views: 1447

Answers (1)

Nick Butler
Nick Butler

Reputation: 24383

In EF, Includes are ignored when you add a projection with Select.

So, you have to explicitly select all the data you want:

select new
{
  @event.SecurityGroupId,
  @event.AbuseCaseId,
  @event.AbuseCase.AbuseCaseStatuses
    .Select( acs => new { AbuseCaseStatus = acs, Status = acs.Status } )
}

This does result in a "flat" object, so you might like to fix up the object graph afterwards:

foreach( var abuseCase in abuseCases )
{
  foreach( var acs in abuseCase.AbuseCaseStatuses )
  {
    acs.AbuseCaseStatus.Status = acs.Status;
  }
}

Upvotes: 1

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