public void TestDetachAllTrackedEntities(int numCollection)
{
//SETUP
var options = SqliteInMemory.CreateOptions <Chapter06Context>();
using (var context = new Chapter06Context(options))
{
context.Database.EnsureCreated();
var entityToDetach = context.AddManyTopWithRelationsToDb();
//ATTEMPT
using (new TimeThings(_output, $"detach all tracked entities - {numCollection * 3:n0} tracked entities."))
{
foreach (var entityEntry in context.ChangeTracker.Entries()) //#A
{
if (entityEntry.Entity != null) //#B
{
entityEntry.State = EntityState.Detached; //#C
}
}
/********************************************
#A This will iterate through each tracked EntityEntry in the current DbContext instance
#B This filters out tracked entities where the entity class instance has been set to null
#C This sets the state of the EntityEntry to Detached
**********************************************/
}
//VERIFY
var topEntity = context.Entry(entityToDetach);
entityToDetach.Collection1.All(x => context.Entry(x).State == EntityState.Detached).ShouldBeTrue();
entityToDetach.Collection2.All(x => context.Entry(x).State == EntityState.Detached).ShouldBeTrue();
entityToDetach.Collection3.All(x => context.Entry(x).State == EntityState.Detached).ShouldBeTrue();
}
}
public void TestDetachAllTrackedEntities(int numCollection)
{
//SETUP
var options = SqliteInMemory.CreateOptions <Chapter06Context>();
using (var context = new Chapter06Context(options))
{
context.Database.EnsureCreated();
var entityToDetach = context.AddManyTopWithRelationsToDb();
//ATTEMPT
using (new TimeThings(_output, $"detach all tracked entities - {numCollection * 3:n0} tracked entities."))
{
context.ChangeTracker.Clear();
}
//VERIFY
var topEntity = context.Entry(entityToDetach);
entityToDetach.Collection1.All(x => context.Entry(x).State == EntityState.Detached).ShouldBeTrue();
entityToDetach.Collection2.All(x => context.Entry(x).State == EntityState.Detached).ShouldBeTrue();
entityToDetach.Collection3.All(x => context.Entry(x).State == EntityState.Detached).ShouldBeTrue();
}
}
