How can I get url for paperclip image in to_json

paperclip, ruby-on-rails

Solution

I believe the easiest way for you to accomplish this will be to create a method in your object to return the avatar URL.

class Model < ActiveRecord::Base
    ...

    def avatar_url
        avatar.url(:medium)
    end

    ...
end

This will then allow you to use the methods option when calling to_json with a simple method that does not require any parameters:

respond_to do |format|
   render :json => @model.to_json(:only => [:id,:name,:homephone,:cellphone], :methods => [:avatar_url])
end

Which should yield you an output along these lines:

{"id" => 1, "name" => "Cool model", "homephone" => 1234567890, "cellphone" => 0987654321, "avatar_url" => "www.coolsite.com/this_avatars_path"}

See these for reference:

Ruby to_json :methods arguments

http://apidock.com/rails/ActiveRecord/Serialization/to_json

Problem

I have a model that uses paperclip like this: ``` has_attached_file :avatar, :styles => { :large => "100x100>" , :medium => "50x50>", :small => "20x20>" }, :default_url => '/images/missing-owner_:style.png' ``` I'm exporting this model with to_json method and I want to export the image url so I could use it in javascript. I know I can access the url like this in the view: ``` <%= image_tag model.avatar.url(:medium) %> ``` But How can I do the same in the to_json method. I have some like this: ``` respond_to do |format| render :json => @model.to_json(:only => [:id,:name,:homephone,:cellphone]) end ```

Original source

Related problems