internal override void ClearCollectionOrRef(IEntityWrapper wrappedEntity, RelationshipNavigation navigation, bool doCascadeDelete)
{
if (null != _wrappedRelatedEntities)
{
//copy into list because changing collection member is not allowed during enumeration.
// If possible avoid copying into list.
var tempCopy = new List <IEntityWrapper>(_wrappedRelatedEntities.Values);
foreach (var wrappedCurrent in tempCopy)
{
// Following condition checks if we have already visited this graph node. If its true then
// we should not do fixup because that would cause circular loop
if ((wrappedEntity.Entity == wrappedCurrent.Entity) &&
(navigation.Equals(RelationshipNavigation)))
{
Remove(
wrappedCurrent, /*fixup*/ false, /*deleteEntity*/ false, /*deleteOwner*/ false, /*applyReferentialConstraints*/
false, /*preserveForeignKey*/ false);
}
else
{
Remove(
wrappedCurrent, /*fixup*/ true, doCascadeDelete, /*deleteOwner*/ false, /*applyReferentialConstraints*/ false,
/*preserveForeignKey*/ false);
}
}
Debug.Assert(
_wrappedRelatedEntities.Count == 0, "After removing all related entities local collection count should be zero");
}
}
internal override void ClearCollectionOrRef(
IEntityWrapper wrappedEntity,
RelationshipNavigation navigation,
bool doCascadeDelete)
{
if (wrappedEntity == null)
{
wrappedEntity = NullEntityWrapper.NullWrapper;
}
if (this._wrappedCachedValue.Entity != null)
{
if (wrappedEntity.Entity == this._wrappedCachedValue.Entity && navigation.Equals((object)this.RelationshipNavigation))
{
this.Remove(this._wrappedCachedValue, false, false, false, false, false);
}
else
{
this.Remove(this._wrappedCachedValue, true, doCascadeDelete, false, true, false);
}
}
else if (this.WrappedOwner.Entity != null && this.WrappedOwner.Context != null && !this.UsingNoTracking)
{
this.WrappedOwner.Context.ObjectStateManager.GetEntityEntry(this.WrappedOwner.Entity).DeleteRelationshipsThatReferenceKeys(this.RelationshipSet, this.ToEndMember);
}
if (this.WrappedOwner.Entity == null)
{
return;
}
this.DetachedEntityKey = (EntityKey)null;
}
internal override void ClearCollectionOrRef(IEntityWrapper wrappedEntity, RelationshipNavigation navigation, bool doCascadeDelete)
{
if (wrappedEntity == null)
{
wrappedEntity = NullEntityWrapper.NullWrapper;
}
if (null != _wrappedCachedValue.Entity)
{
// Following condition checks if we have already visited this graph node. If its true then
// we should not do fixup because that would cause circular loop
if ((wrappedEntity.Entity == _wrappedCachedValue.Entity) &&
(navigation.Equals(RelationshipNavigation)))
{
Remove(
_wrappedCachedValue, /*fixup*/ false, /*deleteEntity*/ false, /*deleteOwner*/ false, /*applyReferentialConstraints*/
false, /*preserveForeignKey*/ false);
}
else
{
Remove(
_wrappedCachedValue, /*fixup*/ true, doCascadeDelete, /*deleteOwner*/ false, /*applyReferentialConstraints*/ true,
/*preserveForeignKey*/ false);
}
}
else
{
// this entity reference could be replacing a relationship that points to a key entry
// we need to search relationships on the Owner entity to see if this is true, and if so remove the relationship entry
if (WrappedOwner.Entity != null &&
WrappedOwner.Context != null &&
!UsingNoTracking)
{
var ownerEntry = WrappedOwner.Context.ObjectStateManager.GetEntityEntry(WrappedOwner.Entity);
ownerEntry.DeleteRelationshipsThatReferenceKeys(RelationshipSet, ToEndMember);
}
}
// If we have an Owner, clear the DetachedEntityKey.
// If we do not have an owner, retain the key so that we can resolve the difference when the entity is attached to a context
if (WrappedOwner.Entity != null)
{
// Clear the detachedEntityKey as well. In cases where we have to fix up the detachedEntityKey, we will not always be able to detect
// if we have *only* a Deleted relationship for a given entity/relationship/role, so clearing this here will ensure that
// even if no other relationships are added, the key value will still be correct.
DetachedEntityKey = null;
}
}
internal override void ClearCollectionOrRef(
IEntityWrapper wrappedEntity,
RelationshipNavigation navigation,
bool doCascadeDelete)
{
if (this._wrappedRelatedEntities == null)
{
return;
}
foreach (IEntityWrapper wrappedEntity1 in new List <IEntityWrapper>((IEnumerable <IEntityWrapper>) this._wrappedRelatedEntities.Values))
{
if (wrappedEntity.Entity == wrappedEntity1.Entity && navigation.Equals((object)this.RelationshipNavigation))
{
this.Remove(wrappedEntity1, false, false, false, false, false);
}
else
{
this.Remove(wrappedEntity1, true, doCascadeDelete, false, false, false);
}
}
}