public EFColumnProvider(EntityType entityType, EFTableProvider table, EdmMember m, bool isPrimaryKey)
: base(table)
{
EdmMember = m;
IsPrimaryKey = isPrimaryKey;
_table = table;
MaxLength = 0;
Name = EdmMember.Name;
//
IsCustomProperty = false;
//
var property = EdmMember as EdmProperty;
if (property != null)
{
IsForeignKeyComponent = DetermineIsForeignKeyComponent(property);
IsGenerated = IsServerGenerated(property);
}
ProcessFacets();
var navProp = m as NavigationProperty;
if (navProp != null)
{
_isAssociation = true;
long key = EFAssociationProvider.BuildRelationshipKey(entityType, navProp.FromEndMember);
((EFDataModelProvider)table.DataModel).RelationshipEndLookup[key] = this;
}
}
private bool DetermineIsForeignKeyComponent(EdmProperty property)
{
var navigationProperties = property.DeclaringType.Members.OfType <NavigationProperty>();
// Look at all NavigationProperties (i.e. strongly-type relationship columns) of the table this column belong to and
// see if there is a foreign key that matches this property
// If this is a 1 to 0..1 relationship and we are processing the more primary side. i.e in the Student in Student-StudentDetail
// and this is the primary key we don't want to check the relationship type since if there are no constraints we will treat the primary key as a foreign key.
return(navigationProperties.Any(n => EFAssociationProvider.GetDependentPropertyNames(n, !IsPrimaryKey /* checkRelationshipType */).Contains(property.Name)));
}
