/// <summary>
/// Gets the LINQ expression filter automatically applied to queries for this entity type.
/// </summary>
/// <param name="entityType"> The entity type to get the query filter for. </param>
/// <returns> The LINQ expression filter factory. </returns>
public static LambdaExpression TryGetQueryFilterFromFactory([NotNull] this IEntityType entityType)
{
Check.NotNull(entityType, nameof(entityType));
var factory = entityType[CoreAnnotationNames.QueryFilter] as Func <LambdaExpression>;
if (factory != null)
{
var lambda = factory();
if (entityType is EntityType)
{
var dbSetAccessRewriter = new DbSetAccessRewritingExpressionVisitor(entityType.ClrType);
var annotation = entityType.GetAnnotation(CoreAnnotationNames.QueryFilter);
((Annotation)annotation).Value = dbSetAccessRewriter.Visit(lambda);
}
return(lambda);
}
return(null);
}
/// <summary>
/// Creates a new instance of <see cref="QueryFilterRewritingConvention" />.
/// </summary>
/// <param name="dependencies">Parameter object containing dependencies for this convention.</param>
public QueryFilterRewritingConvention(ProviderConventionSetBuilderDependencies dependencies)
{
Dependencies = dependencies;
DbSetAccessRewriter = new DbSetAccessRewritingExpressionVisitor(dependencies.ContextType);
}
