objective c - How to do a PFRelation or relational database query with parse in IOS -


how can perform pfrelation query when select shop displays menu item associated it.

my tables in parse looks

menu table/class enter image description here

retailer table/class

enter image description here

in ios code have 2 uitableviews 1) uitableview display "shop_name" retailer table, 2) uitableview display "item_name" menu table.

i have gone far displaying "item_name" irrespective of association/relation table. code looks this. 

- (void) retrievefromparse{     pfquery *retrievemenu = [pfquery querywithclassname:@"menu"];     //[retrievemenu wherekey:@"retailer_id" equalto:_shopobjectid]; //test     [retrievemenu findobjectsinbackgroundwithblock:^(nsarray *menuobjects, nserror *error) {         if(!error){             _menuobjects = [[nsmutablearray alloc]initwitharray:menuobjects];             nslog(@"%@", _menuobjects);         }          [_menuobjectstableview reloaddata];     }]; }

i have logic pass "objectid" of current selectedrow in uitableview1. hoping use "objectid" perform relational queries "item_name" related shop displayed in uitableview2, i'm not sure how that.

if understanding correctly, each menu object in more 1 shop, correct? if so, how want structure query:

pfquery *query = [pfquery querywithclassname:@"menu"]; [query wherekey:@"retailer_id" equalto:[pfobject objectwithoutdatawithclassname:@"retailer_location_class" objectid:@"id passed controller"]];

this query menu class items contain selected retailer in "retailer_id" field.


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