private static InternalRelationshipBuilder SplitNavigationsToSeparateRelationships(InternalRelationshipBuilder relationshipBuilder)
{
var foreignKey = relationshipBuilder.Metadata;
var dependentToPrincipalNavigationName = foreignKey.DependentToPrincipal?.Name;
var principalToDependentNavigationName = foreignKey.PrincipalToDependent?.Name;
if (GetInversePropertyAttribute(foreignKey.PrincipalToDependent) != null ||
GetInversePropertyAttribute(foreignKey.DependentToPrincipal) != null)
{
// Relationship is joined by InversePropertyAttribute
throw new InvalidOperationException(
CoreStrings.InvalidRelationshipUsingDataAnnotations(
dependentToPrincipalNavigationName,
foreignKey.DeclaringEntityType.DisplayName(),
principalToDependentNavigationName,
foreignKey.PrincipalEntityType.DisplayName()));
}
relationshipBuilder = relationshipBuilder.HasNavigation(
(string)null,
pointsToPrincipal: false,
ConfigurationSource.DataAnnotation);
return(relationshipBuilder == null
? null
: foreignKey.PrincipalEntityType.Builder.HasRelationship(
foreignKey.DeclaringEntityType,
principalToDependentNavigationName,
null,
ConfigurationSource.DataAnnotation) == null
? null
: relationshipBuilder);
}