CODEWITHSUNDEEP
ruby-on-railsruby-on-rails-3.1
DIGITALSQUAD
DIGITALSQUAD

Reputation: 3514

include Rails.application.routes.url_helpers cause ArgumentError Missing host to link to

I'm developing Rails 3.1.1.
Including url_helpers in Model cause an ArgumentError on saving model.

class Medium < ActiveRecord::Base
  include Rails.application.routes.url_helpers

  .
  .
end

class MediaController < ApplicationController

  def create
    @medium = Medium.new(params[:medium])
    @media.save # => cause ArgumentError
  end
end

ArgumentError (Missing host to link to! Please provide the :host parameter, set default_url_options[:host], or set :only_path to true):

Another model which also include url_helper doesn't cause error.
What's wrong?
Thanks in advance.

Upvotes: 7

Views: 5031

Answers (2)

amit_saxena
amit_saxena

Reputation: 7614

You need to pass the host as an argument in the call where you are using the helper:

Rails.application.routes.url_helpers.media_url(:host => "localhost:3000")

or a different route like this:

Rails.application.routes.url_helpers.media_url(self, :host => AppConfig.host)

where AppConfig.host is the host depending on environemnt (localhost:300 for development env).

Upvotes: 3

nkm
nkm

Reputation: 5914

This error generally causes when we try to user any url helpers in places where it is not supposed to use. For example if I try to generate password record url from mailer class action, using reset_password_url(@user), i gets same error.

Please make sure that you are not using any _path or _url methods within your model class. Moreover I don't think its a best practice to user url_helpers inside the model.

Upvotes: -2

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