public void Apply(EdmModel model)
{
Check.NotNull(model, "model");
var associationPairs
= (from a1 in model.GetAssociationTypes()
from a2 in model.GetAssociationTypes()
where a1 != a2
where a1.SourceEnd.GetEntityType() == a2.TargetEnd.GetEntityType()
&& a1.TargetEnd.GetEntityType() == a2.SourceEnd.GetEntityType()
let a1Configuration = a1.GetConfiguration() as NavigationPropertyConfiguration
let a2Configuration = a2.GetConfiguration() as NavigationPropertyConfiguration
where (((a1Configuration == null)
|| ((a1Configuration.InverseEndKind == null)
&& (a1Configuration.InverseNavigationProperty == null)))
&& ((a2Configuration == null)
|| ((a2Configuration.InverseEndKind == null)
&& (a2Configuration.InverseNavigationProperty == null))))
select new
{
a1,
a2
})
.Distinct((a, b) => a.a1 == b.a2 && a.a2 == b.a1)
.GroupBy(
(a, b) => a.a1.SourceEnd.GetEntityType() == b.a2.TargetEnd.GetEntityType()
&& a.a1.TargetEnd.GetEntityType() == b.a2.SourceEnd.GetEntityType())
.Where(g => g.Count() == 1)
.Select(g => g.Single());
foreach (var pair in associationPairs)
{
var unifiedAssociation = pair.a2.GetConfiguration() != null ? pair.a2 : pair.a1;
var redundantAssociation = unifiedAssociation == pair.a1 ? pair.a2 : pair.a1;
unifiedAssociation.SourceEnd.RelationshipMultiplicity
= redundantAssociation.TargetEnd.RelationshipMultiplicity;
if (redundantAssociation.Constraint != null)
{
unifiedAssociation.Constraint = redundantAssociation.Constraint;
unifiedAssociation.Constraint.DependentEnd =
unifiedAssociation.Constraint.DependentEnd.GetEntityType() == unifiedAssociation.SourceEnd.GetEntityType()
? unifiedAssociation.SourceEnd
: unifiedAssociation.TargetEnd;
}
FixNavigationProperties(model, unifiedAssociation, redundantAssociation);
model.RemoveAssociationType(redundantAssociation);
}
}
public virtual void SetOwner(EntityType owner)
{
Util.ThrowIfReadOnly(this);
if (owner == null)
{
_database.RemoveAssociationType(_assocationType);
}
else
{
_assocationType.TargetEnd
= new AssociationEndMember(
owner != PrincipalTable ? owner.Name : owner.Name + SelfRefSuffix,
owner);
if (!_database.GetAssociationTypes().Contains(_assocationType))
{
_database.AddAssociationType(_assocationType);
_database.AddAssociationSet(_associationSet);
}
}
}
public void Configure_should_configure_inverse()
{
var inverseMockPropertyInfo = new MockPropertyInfo();
var navigationPropertyConfiguration = new NavigationPropertyConfiguration(new MockPropertyInfo())
{
InverseNavigationProperty = inverseMockPropertyInfo
};
var associationType = new AssociationType();
associationType.SourceEnd = new AssociationEndMember("S", new EntityType());
associationType.TargetEnd = new AssociationEndMember("T", new EntityType());
var inverseAssociationType = new AssociationType();
inverseAssociationType.SourceEnd = new AssociationEndMember("S", new EntityType());
inverseAssociationType.TargetEnd = new AssociationEndMember("T", new EntityType());
var model = new EdmModel().Initialize();
model.AddAssociationType(inverseAssociationType);
var inverseNavigationProperty
= model.AddEntityType("T")
.AddNavigationProperty("N", inverseAssociationType);
inverseNavigationProperty.SetClrPropertyInfo(inverseMockPropertyInfo);
navigationPropertyConfiguration.Configure(
new NavigationProperty("N", TypeUsage.Create(associationType.TargetEnd.GetEntityType()))
{
RelationshipType = associationType
}, model, new EntityTypeConfiguration(typeof(object)));
Assert.Same(associationType, inverseNavigationProperty.Association);
Assert.Same(associationType.SourceEnd, inverseNavigationProperty.ResultEnd);
Assert.Equal(0, model.GetAssociationTypes().Count());
}
