/// <summary>
/// This is an internal API that supports the Entity Framework Core infrastructure and not subject to
/// the same compatibility standards as public APIs. It may be changed or removed without notice in
/// any release. You should only use it directly in your code with extreme caution and knowing that
/// doing so can result in application failures when updating to a new Entity Framework Core release.
/// </summary>
public virtual InternalRelationshipBuilder Apply(
InternalRelationshipBuilder relationshipBuilder,
Navigation navigation)
{
Check.NotNull(relationshipBuilder, nameof(relationshipBuilder));
Check.NotNull(navigation, nameof(navigation));
if (!IsNonNullable(navigation) ||
navigation.IsCollection())
{
return(relationshipBuilder);
}
if (!navigation.IsDependentToPrincipal())
{
var inverse = navigation.FindInverse();
if (inverse != null)
{
if (IsNonNullable(inverse))
{
Logger.NonNullableReferenceOnBothNavigations(navigation, inverse);
return(relationshipBuilder);
}
}
if (!navigation.ForeignKey.IsUnique ||
relationshipBuilder.Metadata.GetPrincipalEndConfigurationSource() != null)
{
return(relationshipBuilder);
}
var newRelationshipBuilder = relationshipBuilder.HasEntityTypes(
relationshipBuilder.Metadata.DeclaringEntityType,
relationshipBuilder.Metadata.PrincipalEntityType,
ConfigurationSource.Convention);
if (newRelationshipBuilder == null)
{
return(relationshipBuilder);
}
Logger.NonNullableOnDependent(newRelationshipBuilder.Metadata.DependentToPrincipal);
relationshipBuilder = newRelationshipBuilder;
}
return(relationshipBuilder.IsRequired(true, ConfigurationSource.Convention) ?? relationshipBuilder);
}
/// <summary>
/// This is an internal API that supports the Entity Framework Core infrastructure and not subject to
/// the same compatibility standards as public APIs. It may be changed or removed without notice in
/// any release. You should only use it directly in your code with extreme caution and knowing that
/// doing so can result in application failures when updating to a new Entity Framework Core release.
/// </summary>
public override InternalRelationshipBuilder Apply(
InternalRelationshipBuilder relationshipBuilder, Navigation navigation, RequiredAttribute attribute)
{
Check.NotNull(relationshipBuilder, nameof(relationshipBuilder));
Check.NotNull(navigation, nameof(navigation));
Check.NotNull(attribute, nameof(attribute));
if (navigation.IsCollection())
{
return(relationshipBuilder);
}
if (!navigation.IsDependentToPrincipal())
{
var inverse = navigation.FindInverse();
if (inverse != null)
{
var attributes = GetAttributes <RequiredAttribute>(inverse.DeclaringEntityType, inverse.Name);
if (attributes.Any())
{
Logger.RequiredAttributeOnBothNavigations(navigation, inverse);
return(relationshipBuilder);
}
}
if (!navigation.ForeignKey.IsUnique ||
relationshipBuilder.Metadata.GetPrincipalEndConfigurationSource() != null)
{
return(relationshipBuilder);
}
var newRelationshipBuilder = relationshipBuilder.HasEntityTypes(
relationshipBuilder.Metadata.DeclaringEntityType,
relationshipBuilder.Metadata.PrincipalEntityType,
ConfigurationSource.Convention);
if (newRelationshipBuilder == null)
{
return(relationshipBuilder);
}
Logger.RequiredAttributeOnDependent(newRelationshipBuilder.Metadata.DependentToPrincipal);
relationshipBuilder = newRelationshipBuilder;
}
return(relationshipBuilder.IsRequired(true, ConfigurationSource.DataAnnotation) ?? relationshipBuilder);
}
private InternalRelationshipBuilder DiscoverProperties(InternalRelationshipBuilder relationshipBuilder)
{
var foreignKey = relationshipBuilder.Metadata;
if (!ConfigurationSource.Convention.Overrides(foreignKey.GetPropertiesConfigurationSource()))
{
using (var batch = foreignKey.DeclaringEntityType.Model.ConventionDispatcher.StartBatch())
{
using (var foreignKeyReference = foreignKey.DeclaringEntityType.Model.ConventionDispatcher.Tracker.Track(foreignKey))
{
foreach (var fkProperty in foreignKey.Properties)
{
if (ConfigurationSource.Convention.Overrides(fkProperty.GetTypeConfigurationSource()) &&
fkProperty.IsShadowProperty() &&
fkProperty.ClrType.IsNullableType() == foreignKey.IsRequired &&
fkProperty.GetContainingForeignKeys().All(otherFk => otherFk.IsRequired == foreignKey.IsRequired))
{
var newType = fkProperty.ClrType.MakeNullable(!foreignKey.IsRequired);
if (fkProperty.ClrType != newType)
{
fkProperty.DeclaringEntityType.Builder.Property(
fkProperty.ClrType.MakeNullable(!foreignKey.IsRequired),
fkProperty.Name,
fkProperty.GetConfigurationSource(), ConfigurationSource.Convention);
}
}
}
batch.Run();
return(foreignKeyReference.Object?.Builder);
}
}
}
var invertable = true;
if (foreignKey.DeclaringEntityType.DefiningEntityType == foreignKey.PrincipalEntityType ||
foreignKey.IsOwnership ||
foreignKey.DeclaringEntityType.IsKeyless ||
(!foreignKey.IsUnique && !ConfigurationSource.Convention.Overrides(foreignKey.GetIsUniqueConfigurationSource())) ||
foreignKey.PrincipalToDependent?.IsCollection() == true ||
foreignKey.DeclaringEntityType.FindOwnership() != null)
{
relationshipBuilder = relationshipBuilder.HasEntityTypes(
foreignKey.PrincipalEntityType, foreignKey.DeclaringEntityType, ConfigurationSource.Convention);
invertable = false;
}
else if (ConfigurationSource.Convention.Overrides(foreignKey.GetPrincipalEndConfigurationSource()) &&
(foreignKey.PrincipalEntityType.DefiningEntityType == foreignKey.DeclaringEntityType ||
(foreignKey.PrincipalEntityType.FindOwnership() != null &&
foreignKey.PrincipalToDependent != null &&
foreignKey.DependentToPrincipal == null)))
{
var invertedRelationshipBuilder = relationshipBuilder.HasEntityTypes(
foreignKey.DeclaringEntityType, foreignKey.PrincipalEntityType, ConfigurationSource.Convention);
if (invertedRelationshipBuilder != null)
{
return(invertedRelationshipBuilder);
}
}
var foreignKeyProperties = FindCandidateForeignKeyProperties(relationshipBuilder.Metadata, onDependent: true);
if (foreignKeyProperties == null)
{
if (invertable &&
ConfigurationSource.Convention.Overrides(foreignKey.GetPrincipalEndConfigurationSource()))
{
var candidatePropertiesOnPrincipal = FindCandidateForeignKeyProperties(foreignKey, onDependent: false);
if (candidatePropertiesOnPrincipal != null)
{
var invertedRelationshipBuilder = relationshipBuilder
.HasEntityTypes(foreignKey.DeclaringEntityType, foreignKey.PrincipalEntityType, ConfigurationSource.Convention);
var invertedFk = invertedRelationshipBuilder?.Metadata;
if (invertedFk?.IsSelfReferencing() == true)
{
invertedRelationshipBuilder = invertedRelationshipBuilder.HasNavigations(
invertedFk.PrincipalToDependent?.Name, invertedFk.DependentToPrincipal?.Name,
ConfigurationSource.Convention);
}
return(invertedRelationshipBuilder ?? (foreignKey.Builder == null ? null : relationshipBuilder));
}
}
if (foreignKey.IsUnique &&
foreignKey.DeclaringEntityType.BaseType == null &&
!foreignKey.IsSelfReferencing())
{
// Try to use PK properties if principal end is not ambiguous
if (!foreignKey.IsOwnership &&
(!ConfigurationSource.Convention.Overrides(foreignKey.GetPrincipalEndConfigurationSource()) ||
foreignKey.DeclaringEntityType.DefiningEntityType == foreignKey.PrincipalEntityType))
{
foreignKeyProperties = GetCompatiblePrimaryKeyProperties(
foreignKey.DeclaringEntityType,
foreignKey.PrincipalEntityType,
foreignKey.PrincipalKey.Properties);
}
else if (invertable)
{
foreignKeyProperties = FindCandidateForeignKeyProperties(foreignKey, onDependent: true, matchPk: true);
var candidatePropertiesOnPrincipal =
FindCandidateForeignKeyProperties(foreignKey, onDependent: false, matchPk: true);
if (candidatePropertiesOnPrincipal != null)
{
if (foreignKeyProperties == null)
{
using (var batch = foreignKey.DeclaringEntityType.Model.ConventionDispatcher.StartBatch())
{
var invertedRelationshipBuilder = relationshipBuilder
.HasEntityTypes(
foreignKey.DeclaringEntityType, foreignKey.PrincipalEntityType, ConfigurationSource.Convention);
return(batch.Run(
invertedRelationshipBuilder.HasForeignKey(
candidatePropertiesOnPrincipal, foreignKey.PrincipalEntityType,
ConfigurationSource.Convention)));
}
}
foreignKeyProperties = null;
relationshipBuilder.Metadata.SetPrincipalEndConfigurationSource(null);
}
}
}
if (foreignKeyProperties == null &&
invertable &&
ConfigurationSource.Convention.Overrides(foreignKey.GetPrincipalEndConfigurationSource()))
{
relationshipBuilder.Metadata.SetPrincipalEndConfigurationSource(null);
}
}
else if (invertable &&
ConfigurationSource.Convention.Overrides(foreignKey.GetPrincipalEndConfigurationSource()))
{
var candidatePropertiesOnPrincipal = FindCandidateForeignKeyProperties(foreignKey, onDependent: false);
if (candidatePropertiesOnPrincipal != null)
{
// Principal end is ambiguous
foreignKeyProperties = null;
relationshipBuilder.Metadata.SetPrincipalEndConfigurationSource(null);
}
}
if (foreignKeyProperties == null)
{
return(ReuniquifyTemporaryProperties(foreignKey, force: false));
}
var conflictingFKCount = foreignKey.DeclaringEntityType.FindForeignKeysInHierarchy(foreignKeyProperties).Count();
if (foreignKey.Properties.SequenceEqual(foreignKeyProperties))
{
return(conflictingFKCount > 1
? ReuniquifyTemporaryProperties(foreignKey, force: true)
: relationshipBuilder);
}
if (conflictingFKCount > 0)
{
return(ReuniquifyTemporaryProperties(foreignKey, force: false));
}
var newRelationshipBuilder = relationshipBuilder.HasForeignKey(foreignKeyProperties, ConfigurationSource.Convention);
if (newRelationshipBuilder != null)
{
return(newRelationshipBuilder);
}
return(relationshipBuilder.Metadata.Builder == null ? null : relationshipBuilder);
}