ios - Core Data Predicate SQL Unable to Parse -


i've been banging head on getting filtering statement work. i've tried bunch of things (as can see in commented code). trying do search when user typing - searches customerobject.firstname, customerobject.lastname, , title - if phrase in of these show results. .lastname , .firstname properties of customerobject.

class func searchcontainspredicateestimateinvoice(searchstring: string, existingpredicate: nspredicate? = nil) -> nspredicate     {         var words = searchstring.componentsseparatedbystring(" ")         var predicatelist = [nspredicate]()         word in words         {             if count(word) > 0             {                 var str = nsstring(format: "subquery(%@, $f, $f.%@ contains[cd] %@) or subquery(%@, $l, $l.%@ contains[cd] %@) or (%@ contains[cd] %@)", "\(customer_object_key)","\(user_first_name_local_key)" ,word, "\(customer_object_key)", "\(user_last_name_local_key)", word, estimate_name_key, word)                 println(str)                 var pred = nspredicate(format: "subquery(%@, $f, $f.%@ contains[cd] %@) or subquery(%@, $l, $l.%@ contains[cd] %@) or (%@ contains[cd] %@)", "\(customer_object_key)","\(user_first_name_local_key)" ,word, "\(customer_object_key)", "\(user_last_name_local_key)", word, estimate_name_key, word)                  //var pred = nspredicate(format: "subquery(customerobject, $f, $f.firstname contains[cd] w).@count > 0")                 //var pred = nspredicate(format: "subquery(customerobject, $g, $g.firstname contains[cd] %@).@count > 0", word)                 //var str = nsstring(format: "subquery(%@, $f, $f.%@ contains[cd] %@) or subquery(%@, $l, $l.%@ contains[cd] %@) or (%@ contains[cd] %@)", "\(customer_object_key)","\(user_first_name_local_key)" ,word, "\(customer_object_key)", "\(user_last_name_local_key)", word, estimate_name_key, word)                 predicatelist.append(pred)             }         }          if existingpredicate != nil         {             predicatelist.append(existingpredicate!)         }          return nscompoundpredicate(type: .andpredicatetype, subpredicates: predicatelist)      }     //var pred = nspredicate(format: "subquery(%k, $f, $f.%k contains[cd] %@) or subquery(%k, $l, $l.%k contains[cd] %@) or (%k contains[cd] %@)", "\(customer_object_key)","\(user_first_name_local_key)" ,word, "\(customer_object_key)", "\(user_last_name_local_key)", word, estimate_name_key, word)

this actual value of appears on log:

subquery(customerobject, $f, $f.firstname contains[cd] w) or subquery(customerobject, $l, $l.lastname contains[cd] w) or (name contains[cd] w)

data model: enter image description here

there problems in predicate creation:

  • subquery used in conjunction to-many relationships (and not needed).
  • never use nsstring(format:) create predicates. escaping , quoting rules between string format strings , predicate format strings different.
  • use %k key path substitution, not %@.

the predicate should therefore like

let pred = nspredicate(format: "%k.%k contains[c] %@ or %k.%k contains[c] %@",     customer_object_key, user_first_name_local_key, word,     customer_object_key, user_last_name_local_key, word)

assuming customer_object_key name of to-one relationship, , user_first_name_local_key/user_last_name_local_key attributes of target entity.


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