public static IReadOnlyProperty?FindFirstPrincipal([NotNull] this IReadOnlyProperty property)
{
Check.NotNull(property, nameof(property));
var concreteProperty = property.AsProperty();
if (concreteProperty.ForeignKeys != null)
{
foreach (var foreignKey in concreteProperty.ForeignKeys)
{
for (var propertyIndex = 0; propertyIndex < foreignKey.Properties.Count; propertyIndex++)
{
if (property == foreignKey.Properties[propertyIndex])
{
return(foreignKey.PrincipalKey.Properties[propertyIndex]);
}
}
}
}
return(null);
}
private static void AddPrincipals(IReadOnlyProperty property, List <IReadOnlyProperty> visited)
{
var concreteProperty = property.AsProperty();
if (concreteProperty.ForeignKeys != null)
{
foreach (var foreignKey in concreteProperty.ForeignKeys)
{
for (var propertyIndex = 0; propertyIndex < foreignKey.Properties.Count; propertyIndex++)
{
if (property == foreignKey.Properties[propertyIndex])
{
var principal = foreignKey.PrincipalKey.Properties[propertyIndex];
if (!visited.Contains(principal))
{
visited.Add(principal);
AddPrincipals(principal, visited);
}
}
}
}
}
}