ios - how to query based on pfobject/pfuser associated with another pfobject in parse.com? -

i have parse class called friendrelation. class has 2 users, 1 friend other user.

i want of messages posted of friends of user. attempting following query:

 pfquery *innerquery = [pfquery querywithclassname:@"friendrelation"];             [innerquery wherekey:@"user" equalto:currentuser];             pfquery *query = [pfquery querywithclassname:@"message"];             [query wherekey:@"usermessage" matchesquery:innerquery];             [query findobjectsinbackgroundwithblock:^(nsarray *comments, nserror *error) {             }]; 

this query comes no results.

i believe occurring because of line:

 [query wherekey:@"usermessage" matchesquery:innerquery]; 

the key needs friendrelation match. correct?

how can make results of inner query user intern match matching query?

thanks!

you can try using

- (void)wherekey:(nsstring *)key matcheskey:(nsstring *)otherkey inquery:(pfquery *)query

something like:

pfquery *innerquery = [pfquery querywithclassname:@"friendrelation"];         [innerquery wherekey:@"user" equalto:currentuser];         pfquery *query = [pfquery querywithclassname:@"message"];         [query wherekey:@"usermessage" matcheskey:@"firenduser" inquery:innerquery];         [query findobjectsinbackgroundwithblock:^(nsarray *comments, nserror *error) {             //do useful..        }]; 

let me know how goes!