public IEnumerable <IConceptInfo> CreateNewConcepts(PolymorphicInfo conceptInfo, IDslModel existingConcepts)
{
var newConcepts = new List <IConceptInfo>();
// Create a supertype SQL view - union of subtypes:
newConcepts.Add(new PolymorphicUnionViewInfo(conceptInfo));
// Create a subtype name property:
var subtypeString = new ShortStringPropertyInfo {
DataStructure = conceptInfo, Name = "Subtype"
};
newConcepts.Add(subtypeString);
_conceptMetadata.Set(subtypeString, PolymorphicPropertyInfo.IsPolymorphicSystemProperty, true);
newConcepts.Add(new PolymorphicPropertyInfo {
Property = subtypeString
}); // Minor optimization to reduce the number of macro evaluations.
// Mark polymorphic properties:
newConcepts.AddRange(existingConcepts
.FindByReference <PropertyInfo>(p => p.DataStructure, conceptInfo)
.Select(p => new PolymorphicPropertyInfo {
Property = p
}));
// Automatically materialize the polymorphic entity if it is referenced or extended, so the polymorphic can be used in FK constraint:
if (existingConcepts.FindByType <ReferencePropertyInfo>().Where(r => r.Referenced == conceptInfo && r.DataStructure is EntityInfo).Any() ||
existingConcepts.FindByType <UniqueReferenceInfo>().Where(e => e.Base == conceptInfo && e.Extension is EntityInfo).Any())
{
newConcepts.Add(new PolymorphicMaterializedInfo {
Polymorphic = conceptInfo
});
}
// Optimized filter by subtype allows better SQL server optimization of the execution plan:
newConcepts.Add(new FilterByInfo
{
Source = conceptInfo,
Parameter = "Rhetos.Dom.DefaultConcepts.FilterSubtype",
Expression = @"(repository, parameter) =>
{{
Expression<Func<Common.Queryable." + conceptInfo.Module.Name + @"_" + conceptInfo.Name + @", bool>> filterExpression = null;
parameter.ImplementationName = parameter.ImplementationName ?? """";
" + SetFilterExpressionTag.Evaluate(conceptInfo) + @"
if (filterExpression == null)
throw new Rhetos.ClientException(string.Format(""Invalid subtype name or implementation name provided: '{0}', '{1}'."",
parameter.Subtype, parameter.ImplementationName));
return Filter(Query().Where(filterExpression), parameter.Ids).ToSimple().ToArray();
}}"
});
return(newConcepts);
}
public static bool IsSupported(ShortStringPropertyInfo property)
{
return property.DataStructure is EntityInfo;
}