expression(forFetch:context:countOnly:)

Returns an expression which will evaluate to the result of executing a fetch request on a context.

Declaration

class func expression(forFetch fetch: NSExpression, context: NSExpression, countOnly countFlag: Bool) -> NSExpression

fetch:
An expression that evaluates to an instance of NSFetchRequest.
context:
An expression that evaluates to an instance of NSManagedObjectContext.
countFlag:
If True, when the new expression is evaluated the managed object context (from context) will perform Count(for:) 93zbm with the fetch request (from fetch). If False, when the new expression is evaluated the managed object context will perform Fetch(_:) 38ys1 with the fetch request.

An expression which will evaluate to the result of executing a fetch request (from fetch) on a managed object context (from context).