AFNetworking nested param request

I have a Rails API that generates locations, and menus for those locations. In my iOS app, I'm using AFNetworking to retrieve a JSON list of those locations in a table view.

This is the AFNetworking request I use to get Location data:

LocationTableViewController.m

[[LocationApiClient sharedInstance] getPath:@"locations.json" parameters:nil
    success:^(AFHTTPRequestOperation *operation, id response) {
        NSLog(@"Response: %@", response);
        NSMutableArray *results = [NSMutableArray array];
        for (id locationDictionary in response) {
            Location *location = [[Location alloc] initWithDictionary:locationDictionary];
            [results addObject:location];
            
        }
        self.results = results;
        [self.tableView reloadData];
    }
    failure:^(AFHTTPRequestOperation *operation, NSError *error) {
        NSLog(@"Error fetching locations!");
        NSLog(@"%@", error);
        
    }];

A sample of the JSON returned for the location request:

 {
    "created_at" = "2013-02-23T19:25:26Z";
    id = 2;
    lat = "48.870175";
    long = "2.779899999999998";
    name = "Disneyland Hotel";
    "places_id" = fd90769e2cf40d6cb6cb1a3d0bfd0ce5d37ed331;
    "street_address" = "Rue de la Marni\U00e8re, Chessy, France";
    "updated_at" = "2013-02-23T19:25:26Z";
}, 

The name and address are displayed:

When a user taps on a location cell, I would like to display a table view of that locations beer list. The Rails APPI route (for location_id => 1) is http://localhost:3000/locations/1/beers.json and outputs the following JSON for a beer that belongs to location_id:1:

{
"created_at":"2013-02-23T19:25:53Z",
"description":"fkjgvjkg",
"id":1,"location_id":1,
"name":"nhoihioh",
"price":"2.5","style":"ipa",
"updated_at":"2013-02-23T19:25:53Z"
}

When the user taps a location cell I want to display the beer list for that location, which is consumed via http://localhost:3000/locations/(whatever location_id is associated with the table cell that was tapped)/beers.json

How can I insert the location_id into the following AFNetworking request that occurs in the next table view when a user taps a location cell?

BeerTableViewController.m

[[LocationApiClient sharedInstance] getPath:@"locations/**(location_id from location table cell inserted here)**/beers.json" parameters:nil
    success:^(AFHTTPRequestOperation *operation, id response) {
        NSLog(@"Response: %@", response);
        NSMutableArray *results = [NSMutableArray array];
        for (id beerDictionary in response) {
            Beer *beer = [[Beer alloc] initWithDictionary:beerDictionary];
            [results addObject:beer];
            
        }
        self.results = results;
        [self.tableView reloadData];
    }
    failure:^(AFHTTPRequestOperation *operation, NSError *error) {
        NSLog(@"Error fetching beers!");
        NSLog(@"%@", error);
        
    }];

I assume I have to log the location_id and pass that value as a param of the URL when a table cell is tapped, but am not sure how to do that.

As you are working with JSON you should probably be using AFJSONRequestOperation as it will parse the response data for into a dictionary.

AFJSONRequestOperation JSONRequestOperationWithRequest:request
                                                           success:^(NSURLRequest *request, NSHTTPURLResponse *response, id locationJSON) {

....

};

You can then get the places_id from the dictionary and do another call to get the beer info.