internal override void Configure(
EdmAssociationType associationType, EdmAssociationEnd dependentEnd,
EntityTypeConfiguration entityTypeConfiguration)
{
//Contract.Requires(associationType != null);
//Contract.Requires(dependentEnd != null);
//Contract.Requires(entityTypeConfiguration != null);
}
public static EdmAssociationEnd GetOtherEnd(
this EdmAssociationType associationType, EdmAssociationEnd associationEnd)
{
Contract.Requires(associationType != null);
Contract.Requires(associationEnd != null);
return associationEnd == associationType.SourceEnd
? associationType.TargetEnd
: associationType.SourceEnd;
}
private void ConfigureDeleteAction(EdmAssociationEnd principalEnd)
{
//Contract.Requires(principalEnd != null);
if (DeleteAction != null)
{
principalEnd.DeleteAction = DeleteAction.Value;
}
}
private void ConfigureConstraint(
EdmAssociationType associationType,
EdmAssociationEnd dependentEnd,
EntityTypeConfiguration entityTypeConfiguration)
{
//Contract.Requires(associationType != null);
//Contract.Requires(dependentEnd != null);
//Contract.Requires(entityTypeConfiguration != null);
if (_constraint != null)
{
_constraint.Configure(associationType, dependentEnd, entityTypeConfiguration);
var associationConstraint = associationType.Constraint;
if ((associationConstraint != null)
&& associationConstraint.DependentProperties
.SequenceEqual(associationConstraint.DependentEnd.EntityType.DeclaredKeyProperties))
{
// The dependent FK is also the PK. We need to adjust the multiplicity
// when it has not been explicity configured because the default is *:0..1
if ((_inverseEndKind == null)
&& associationType.SourceEnd.IsMany())
{
associationType.SourceEnd.EndKind = EdmAssociationEndKind.Optional;
associationType.TargetEnd.EndKind = EdmAssociationEndKind.Required;
}
}
}
}
public void IsMany_should_return_true_when_end_kind_is_many()
{
var associationEnd = new EdmAssociationEnd { EndKind = EdmAssociationEndKind.Many };
Assert.True(associationEnd.IsMany());
}
public void IsRequired_should_return_true_when_end_kind_is_required()
{
var associationEnd = new EdmAssociationEnd { EndKind = EdmAssociationEndKind.Required };
Assert.True(associationEnd.IsRequired());
}
public void IsOptional_should_return_true_when_end_kind_is_optional()
{
var associationEnd = new EdmAssociationEnd { EndKind = EdmAssociationEndKind.Optional };
Assert.True(associationEnd.IsOptional());
}
internal override void Configure(
EdmAssociationType associationType, EdmAssociationEnd dependentEnd,
EntityTypeConfiguration entityTypeConfiguration)
{
associationType.MarkIndependent();
}
internal override void Configure(
EdmAssociationType associationType, EdmAssociationEnd dependentEnd,
EntityTypeConfiguration entityTypeConfiguration)
{
if (!_dependentProperties.Any())
{
return;
}
var associationConstraint
= new EdmAssociationConstraint
{
DependentEnd = dependentEnd
};
var dependentProperties = _dependentProperties.AsEnumerable();
if (!IsFullySpecified)
{
var foreignKeys
= from p in _dependentProperties
select new
{
PropertyInfo = p,
entityTypeConfiguration.Property(new PropertyPath(p)).ColumnOrder
};
if ((_dependentProperties.Count > 1)
&& foreignKeys.Any(p => !p.ColumnOrder.HasValue))
{
var dependentKeys = dependentEnd.EntityType.DeclaredKeyProperties;
if ((dependentKeys.Count == _dependentProperties.Count)
&&
foreignKeys.All(fk => dependentKeys.Any(p => p.GetClrPropertyInfo().IsSameAs(fk.PropertyInfo))))
{
// The FK and PK sets are equal, we know the order
dependentProperties = dependentKeys.Select(p => p.GetClrPropertyInfo());
}
else
{
throw Error.ForeignKeyAttributeConvention_OrderRequired(entityTypeConfiguration.ClrType);
}
}
else
{
dependentProperties = foreignKeys.OrderBy(p => p.ColumnOrder).Select(p => p.PropertyInfo);
}
}
foreach (var dependentProperty in dependentProperties)
{
var property
= associationConstraint
.DependentEnd
.EntityType
.GetDeclaredPrimitiveProperty(dependentProperty);
if (property == null)
{
throw Error.ForeignKeyPropertyNotFound(
dependentProperty.Name, associationConstraint.DependentEnd.EntityType.Name);
}
associationConstraint.DependentProperties.Add(property);
}
associationType.Constraint = associationConstraint;
var principalEnd = associationType.GetOtherEnd(dependentEnd);
if (principalEnd.IsRequired())
{
associationType.Constraint.DependentProperties.Each(p => p.PropertyType.IsNullable = false);
}
}
/// <summary>
/// Attempt to determine the principal and dependent ends of this association.
///
/// The following table illustrates the solution space.
///
/// Source | Target || Prin | Dep |
/// -------|--------||-------|-------|
/// 1 | 1 || - | - |
/// 1 | 0..1 || Sr | Ta |
/// 1 | * || Sr | Ta |
/// 0..1 | 1 || Ta | Sr |
/// 0..1 | 0..1 || - | - |
/// 0..1 | * || Sr | Ta |
/// * | 1 || Ta | Sr |
/// * | 0..1 || Ta | Sr |
/// * | * || - | - |
/// </summary>
public static bool TryGuessPrincipalAndDependentEnds(
this EdmAssociationType associationType,
out EdmAssociationEnd principalEnd,
out EdmAssociationEnd dependentEnd)
{
Contract.Requires(associationType != null);
Contract.Assert(associationType.SourceEnd != null);
Contract.Assert(associationType.TargetEnd != null);
principalEnd = dependentEnd = null;
var sourceEnd = associationType.SourceEnd;
var targetEnd = associationType.TargetEnd;
if (sourceEnd.EndKind
!= targetEnd.EndKind)
{
principalEnd
= (sourceEnd.IsRequired()
|| (sourceEnd.IsOptional() && targetEnd.IsMany()))
? sourceEnd
: targetEnd;
dependentEnd
= (principalEnd == sourceEnd)
? targetEnd
: sourceEnd;
}
return (principalEnd != null);
}
internal abstract void Configure(
EdmAssociationType associationType, EdmAssociationEnd dependentEnd,
EntityTypeConfiguration entityTypeConfiguration);
private void GenerateIndependentForeignKeyConstraint(
DbDatabaseMapping databaseMapping,
EdmEntityType principalEntityType,
EdmEntityType dependentEntityType,
DbTableMetadata dependentTable,
DbAssociationSetMapping associationSetMapping,
DbAssociationEndMapping associationEndMapping,
string name,
EdmAssociationEnd principalEnd,
bool isPrimaryKeyColumn = false)
{
//Contract.Requires(databaseMapping != null);
//Contract.Requires(principalEntityType != null);
//Contract.Requires(dependentTable != null);
//Contract.Requires(associationEndMapping != null);
//Contract.Requires(!string.IsNullOrWhiteSpace(name));
var principalTable
= GetEntityTypeMappingInHierarchy(databaseMapping, principalEntityType)
.TypeMappingFragments
.Single()
.Table;
var foreignKeyConstraint = new DbForeignKeyConstraintMetadata
{
Name = name,
PrincipalTable = principalTable,
DeleteAction = associationEndMapping.AssociationEnd.DeleteAction.HasValue
? (DbOperationAction)
associationEndMapping.AssociationEnd.DeleteAction.
Value
: DbOperationAction.None
};
var principalNavigationProperty
= databaseMapping.Model.GetEntityTypes()
.SelectMany(e => e.DeclaredNavigationProperties)
.SingleOrDefault(n => n.ResultEnd == principalEnd);
GenerateIndependentForeignKeyColumns(
principalEntityType,
dependentEntityType,
associationSetMapping,
associationEndMapping,
dependentTable,
foreignKeyConstraint,
isPrimaryKeyColumn,
principalNavigationProperty);
dependentTable.ForeignKeyConstraints.Add(foreignKeyConstraint);
}
private static DbAssociationSetMapping GenerateAssociationSetMapping(
EdmAssociationType associationType,
DbDatabaseMapping databaseMapping,
EdmAssociationEnd principalEnd,
EdmAssociationEnd dependentEnd,
DbTableMetadata dependentTable)
{
//Contract.Requires(associationType != null);
//Contract.Requires(databaseMapping != null);
//Contract.Requires(principalEnd != null);
//Contract.Requires(dependentEnd != null);
//Contract.Requires(dependentTable != null);
var associationSetMapping
= databaseMapping.AddAssociationSetMapping(
databaseMapping.Model.GetAssociationSet(associationType));
associationSetMapping.Table = dependentTable;
associationSetMapping.SourceEndMapping.AssociationEnd = principalEnd;
associationSetMapping.TargetEndMapping.AssociationEnd = dependentEnd;
return associationSetMapping;
}
