Rails - building an absolute url in a model's virtual attribute without url helper

Posted by Nick on Stack Overflow See other posts from Stack Overflow or by Nick
Published on 2010-04-23T00:10:03Z Indexed on 2010/04/23 0:13 UTC
Read the original article Hit count: 306

Filed under:

ruby-on-rails

|

model

|

paperclip

I have a model that has paperclip attachments.

The model might be used in multiple rails apps

I need to return a full (non-relative) url to the attachment as part of a JSON API being consumed elsewhere.

I'd like to abstract the paperclip aspect and have a simple virtual attribute like this:

  def thumbnail_url
    self.photo.url(:thumb)
  end

This however only gives me the relative path. Since it's in the model I can't use the URL helper methods, right?

What would be a good approach to prepending the application root url since I don't have helper support? I would like to avoid hardcoding something or adding code to the controller method that assembles my JSON.

Thank you

© Stack Overflow or respective owner

Related posts about ruby-on-rails

Ruby on Rails - How can I start? [closed]

as seen on Programmers - Search for 'Programmers'
I have misconception in understanding the relationship between Ruby language and Ruby on Rails Framework. Because of 'I am an absolute beginner' in web development I have no idea if I have to grasp the fundamentals of Ruby before I go with Ruby on Rails! I also want to ask who is behind both Ruby… >>> More
DES3 decryption in Ruby on Rails

as seen on Stack Overflow - Search for 'Stack Overflow'
My RoR server receives a string, that was encrypted in C++ application using des3 with base64 encoding The cipher object is created so: cipher = OpenSSL::Cipher::Cipher::new("des3") cipher.key = key_str cipher.iv = iv_str key_str and iv_str: are string representations of key and initialization… >>> More
Ruby on rails: Image downloads with Authentication/Authorization/Time outs

as seen on Stack Overflow - Search for 'Stack Overflow'
Hi Guys, I'm having few doubts on implementing file downloads. I'm creating an app where I use attachment_fu with Amazon s3 to upload files. Things are working pretty well so far on uploading side. Now its the time to start the file downloads. Here is what I need, a logged in user search and browse… >>> More
Ruby on Rails deployment, on "thin" server with lot of attachments

as seen on Stack Overflow - Search for 'Stack Overflow'
A lot of PDFs are stored inside MySQL as a BLOB field for each PDF file. The average file size is 500K each. The Rails app will stream the :binary data as file downloads, where there is a user click on the download link. Assume there is a maximum of 5 users downloading 5 PDFs concurrently, what… >>> More
Apply Behavior Driven Development to Ruby on Rails with Rspec

as seen on Internet.com - Search for 'Internet.com'
Applying the Behavior Driven Development (BDD) methodology to your Rails development takes you beyond traditional Test Driven Development. Learn how to do it with the Ruby-based BDD framework RSpec. >>> More

Related posts about model

Why model => model.Reason_ID turns to model =>Convert(model.Reason_ID)

as seen on Stack Overflow - Search for 'Stack Overflow'
I have my own html helper extension, wich I use this way <%=Html.LocalizableLabelFor(model => model.Reason_ID, Register.PurchaseReason) %> which declared like this. public static MvcHtmlString LocalizableLabelFor<T>(this HtmlHelper<T> helper, Expression<Func<T, object>>… >>> More
Rails model belongs to model that belongs to model but i want to use another name

as seen on Stack Overflow - Search for 'Stack Overflow'
Hello. This may be a stupid question but im just starting to learn Rail thats why i am asking thsi question. I have one model called "User" which handles all the users in my community. Now i want to add a guestbook to every user. So i created a model called "user_guestbook" and inserted this into… >>> More
AngularJS on top of ASP.NET: Moving the MVC framework out to the browser

as seen on Simple Talk - Search for 'Simple Talk'
Heavily drawing inspiration from Ruby on Rails, MVC4’s convention over configuration model of development soon became the Holy Grail of .NET web development. The MVC model brought with it the goodness of proper separation of concerns between business logic, data, and the presentation logic. However… >>> More
strange data annotations issue in MVC 2

as seen on Stack Overflow - Search for 'Stack Overflow'
Hello, I came across something strange when creating an edit form with MVC 2. i realised that my error messages come up on form sumission even when i have filled ut valid data! i am using a buddy class which i have configured correctly ( i know that cos i can see my custom errors). Here is the code… >>> More
How to disabled the input,textarea,select using this code..

as seen on Stack Overflow - Search for 'Stack Overflow'
Hello friends I am using this code in my view.. <%@ Control Language="C#" Inherits="System.Web.Mvc.ViewUserControl<NorthernTrust.ATP.iTool.Core.Business.Entities.Exceptions.PricingMassEditBE>" %> <script type="text/javascript"> $("#PricingEditExceptions").find("input, select… >>> More