private void ConfigureDependentBehavior(
EdmAssociationType associationType, EdmModel model, EntityTypeConfiguration entityTypeConfiguration)
{
//Contract.Requires(associationType != null);
//Contract.Requires(model != null);
//Contract.Requires(entityTypeConfiguration != null);
EdmAssociationEnd principalEnd;
EdmAssociationEnd dependentEnd;
if (!associationType.TryGuessPrincipalAndDependentEnds(out principalEnd, out dependentEnd))
{
if (IsNavigationPropertyDeclaringTypePrincipal.HasValue)
{
associationType.MarkPrincipalConfigured();
var navProp = model.Namespaces
.SelectMany(ns => ns.EntityTypes)
.SelectMany(et => et.DeclaredNavigationProperties)
.Where(np => np.GetClrPropertyInfo().IsSameAs(NavigationProperty))
.Single();
principalEnd = IsNavigationPropertyDeclaringTypePrincipal.Value
? associationType.GetOtherEnd(navProp.ResultEnd)
: navProp.ResultEnd;
dependentEnd = associationType.GetOtherEnd(principalEnd);
if (associationType.SourceEnd != principalEnd)
{
// need to move around source to be principal, target to be dependent so Edm services will use the correct
// principal and dependent ends. The Edm default Db + mapping service tries to guess principal/dependent
// based on multiplicities, but if it can't figure it out, it will use source as principal and target as dependent
associationType.SourceEnd = principalEnd;
associationType.TargetEnd = dependentEnd;
var associationSet
= model.Containers
.SelectMany(ct => ct.AssociationSets)
.Where(aset => aset.ElementType == associationType).Single();
var sourceSet = associationSet.SourceSet;
associationSet.SourceSet = associationSet.TargetSet;
associationSet.TargetSet = sourceSet;
}
}
if (principalEnd == null)
{
dependentEnd = associationType.TargetEnd;
}
}
ConfigureConstraint(associationType, dependentEnd, entityTypeConfiguration);
ConfigureDeleteAction(associationType.GetOtherEnd(dependentEnd));
}
public void TryGuessPrincipalAndDependentEnds_should_return_correct_ends_for_optional_to_required()
{
var associationType = new EdmAssociationType().Initialize();
associationType.SourceEnd.EndKind = EdmAssociationEndKind.Optional;
associationType.TargetEnd.EndKind = EdmAssociationEndKind.Required;
EdmAssociationEnd principalEnd, dependentEnd;
associationType.TryGuessPrincipalAndDependentEnds(out principalEnd, out dependentEnd);
Assert.Same(associationType.TargetEnd, principalEnd);
Assert.Same(associationType.SourceEnd, dependentEnd);
}
private static void UpdatePrincipalTables(
DbDatabaseMapping databaseMapping, DbTableMetadata toTable, bool removeFks,
EdmAssociationType associationType, EdmEntityType et)
{
EdmAssociationEnd principalEnd, dependentEnd;
var endsToCheck = new List<EdmAssociationEnd>();
if (associationType.TryGuessPrincipalAndDependentEnds(out principalEnd, out dependentEnd))
{
endsToCheck.Add(principalEnd);
}
else if (associationType.SourceEnd.EndKind == EdmAssociationEndKind.Many
&& associationType.TargetEnd.EndKind == EdmAssociationEndKind.Many)
{
// many to many consider both ends
endsToCheck.Add(associationType.SourceEnd);
endsToCheck.Add(associationType.TargetEnd);
}
else
{
// 1:1 and 0..1:0..1
endsToCheck.Add(associationType.SourceEnd);
}
foreach (var end in endsToCheck)
{
if (end.EntityType == et)
{
IEnumerable<KeyValuePair<DbTableMetadata, IEnumerable<DbTableColumnMetadata>>> dependentTableInfos;
if (associationType.Constraint != null)
{
var originalDependentType = associationType.GetOtherEnd(end).EntityType;
var allDependentTypes = databaseMapping.Model.GetSelfAndAllDerivedTypes(originalDependentType);
dependentTableInfos =
allDependentTypes.Select(t => databaseMapping.GetEntityTypeMapping(t)).Where(
dm => dm != null)
.SelectMany(
dm => dm.TypeMappingFragments
.Where(
tmf => associationType.Constraint.DependentProperties
.All(
p =>
tmf.PropertyMappings.Any(
pm => pm.PropertyPath.First() == p))))
.Distinct((f1, f2) => f1.Table == f2.Table)
.Select(
df =>
new KeyValuePair<DbTableMetadata, IEnumerable<DbTableColumnMetadata>>(
df.Table,
df.PropertyMappings.Where(
pm =>
associationType.Constraint.DependentProperties.Contains(
pm.PropertyPath.First())).Select(
pm => pm.Column)));
}
else
{
// IA
var associationSetMapping =
databaseMapping.EntityContainerMappings.Single().AssociationSetMappings.Where(
asm => asm.AssociationSet.ElementType == associationType).Single();
var dependentTable = associationSetMapping.Table;
var propertyMappings = associationSetMapping.SourceEndMapping.AssociationEnd == end
? associationSetMapping.SourceEndMapping.PropertyMappings
: associationSetMapping.TargetEndMapping.PropertyMappings;
var dependentColumns = propertyMappings.Select(pm => pm.Column);
dependentTableInfos = new[]
{
new KeyValuePair
<DbTableMetadata, IEnumerable<DbTableColumnMetadata>>(
dependentTable, dependentColumns)
};
}
foreach (var tableInfo in dependentTableInfos)
{
foreach (
var fk in
tableInfo.Key.ForeignKeyConstraints.Where(
fk => fk.DependentColumns.SequenceEqual(tableInfo.Value)).ToArray(
))
{
if (removeFks)
{
tableInfo.Key.ForeignKeyConstraints.Remove(fk);
}
else
{
fk.PrincipalTable = toTable;
}
}
}
}
}
}
private void GenerateIndependentAssociationType(
EdmAssociationType associationType, DbDatabaseMapping databaseMapping)
{
//Contract.Requires(associationType != null);
//Contract.Requires(databaseMapping != null);
EdmAssociationEnd principalEnd, dependentEnd;
if (!associationType.TryGuessPrincipalAndDependentEnds(out principalEnd, out dependentEnd))
{
if (!associationType.IsPrincipalConfigured())
{
throw Error.UnableToDeterminePrincipal(
associationType.SourceEnd.EntityType.GetClrType(),
associationType.TargetEnd.EntityType.GetClrType());
}
principalEnd = associationType.SourceEnd;
dependentEnd = associationType.TargetEnd;
}
var dependentEntityTypeMapping = GetEntityTypeMappingInHierarchy(databaseMapping, dependentEnd.EntityType);
var dependentTable = dependentEntityTypeMapping
.TypeMappingFragments
.First()
.Table;
var associationSetMapping
= GenerateAssociationSetMapping(
associationType, databaseMapping, principalEnd, dependentEnd, dependentTable);
GenerateIndependentForeignKeyConstraint(
databaseMapping,
principalEnd.EntityType,
dependentEnd.EntityType,
dependentTable,
associationSetMapping,
associationSetMapping.SourceEndMapping,
associationType.Name,
principalEnd);
foreach (var property in dependentEnd.EntityType.KeyProperties())
{
associationSetMapping.TargetEndMapping.PropertyMappings.Add(
new DbEdmPropertyMapping
{
Column = dependentEntityTypeMapping.GetPropertyMapping(property).Column,
PropertyPath = new[] { property }
});
}
}
