Question

I have a listings_controller in my rails app along with a Listing model.
The db consists of listings each with name, latitude, longitude, etc.

There is a method in my listing_controller that when called should return a JSON object to the caller.

the JSON object should get its data from the corresponding Listings model. However, I want the JSON object to only contains the name, latitude, longitude of each listing and not other attributes of the model. How can I restrict this?

Right now when the method returns a JSON object it includes all the attributes of each listing.

Here is the current implementation:

def list  
@listings = Listing.order(:name)  
render :text=>(@listings).to_json()  

end

Answer 1

How about to replace:

@listings = Listing.order(:name)  

with:

@listings = Listing.order(:name).select([:name, :latitude, :longitude])