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