private void InitializeLazyMembers()
{
// A property that is part of a "unified key" has multiple incoming associations
_isUnified = new Lazy <bool>(
() => IncomingAssociations.Count > 1);
_lookupEntity = new Lazy <Entity>(
() =>
{
// Detached properties are not lookup properties
if (Entity == null)
{
return(null);
}
// Is this property a TypeId or DescriptorId on the table? If so, it's not a lookup property.
if (DescriptorEntitySpecification.IsEdFiDescriptorEntity(Entity.Name) &&
PropertyName == Entity.Name + "Id") // TODO: Embedded convention - Types/descriptor properties use entity name + "Id" suffix
{
return(null);
}
var currentAssociation = IncomingAssociations.FirstOrDefault(
x =>
x.AssociationType == AssociationViewType.FromBase ||
x.AssociationType == AssociationViewType.OneToOneIncoming ||
x.AssociationType == AssociationViewType.ManyToOne
// Prevent processing self-recursive relationships with key unification on current property (prevent endless loop)
&& !(x.IsSelfReferencing && PropertyName.EqualsIgnoreCase(
x.PropertyMappingByThisName[PropertyName]
.OtherProperty.PropertyName)));
if (currentAssociation == null)
{
return(null);
}
var currentThisProperty = this;
while (currentAssociation != null)
{
var otherProperty = currentAssociation.PropertyMappingByThisName[currentThisProperty.PropertyName]
.OtherProperty;
if (ModelComparers.EntityProperty.Equals(currentThisProperty, otherProperty))
{
throw new Exception(
"Association property mapping endpoints refer to the same property.");
}
currentThisProperty = otherProperty;
// Stop looking if we've hit a lookup table (Type or Descriptor)
if (currentThisProperty.Entity.IsLookup)
{
break;
}
currentAssociation = otherProperty.IncomingAssociations.FirstOrDefault(
x =>
x.AssociationType == AssociationViewType.FromBase ||
x.AssociationType == AssociationViewType.OneToOneIncoming ||
x.AssociationType == AssociationViewType.ManyToOne &&
!(x.IsSelfReferencing && currentThisProperty.PropertyName.EqualsIgnoreCase(
x.PropertyMappingByThisName[
currentThisProperty
.PropertyName]
.OtherProperty
.PropertyName)));
}
return
(currentThisProperty.Entity.IsLookup &&
currentThisProperty.Entity.Aggregate != Entity.Aggregate
? currentThisProperty.Entity
: null);
});
}