CODEWITHSUNDEEP
ruby-on-railsruby-on-rails-3
Pierre-Louis Gottfrois
Pierre-Louis Gottfrois

Reputation: 17631

How to create link_to into model

I am wondering how I can handle this:

I want to generate a link_to into a body message when I save it through a model method.

Let say in this method, I create a new Message and wants to put a link inside it so when users of my website could click on it when going through every messages.

How would you do this in a nice way ? I tried this, but didn't work

Request.rb

  # Create a new Message after an acceptance
  def notify_acceptance
    msg = Message.new(subjects: [self.subject], author: self.evaluated_by)
    msg.body = "a warm welcome to #{ActionView::Helpers.url_to_user_profile(self.requested_by)} who just joined us!"
    msg.distribute([self.subject], self.evaluated_by)
    return msg.save!
  end

Here my Helper file :

module RequestsHelper
  def url_to_user_profile(user)
    link_to user.name, profiles_path(user.id)
  end
end

Thx !

Upvotes: 1

Views: 10279

Answers (3)

raykin
raykin

Reputation: 1757

I think the problem is your model(maybe user) did not recognize profiles_path(user.id), so add following in User model

include ActionDispatch::Routing::UrlFor
include Rails.application.routes.url_helpers

I did not suggest include more view helpers in your model, you can't use link_to, but path helper method works, then create url like " link_name " in your msg It works in Rails3.

Upvotes: 0

Nicos Karalis
Nicos Karalis

Reputation: 3773

Have you tried this way?

link_to user.name, :controller => "profiles", :action => "show", :id => user.id

so:

link_to "String you want", :controller => "controllers name", :action => "action", :(param name) => value

and here you can insert how many params do you need

EDIT

with profiles_url(user.id) you get the url to this page, with that you can manualy create your linklike this:

msg.body =  "a warm welcome to <a href='#{profiles_url(self.requested_by.id)}'>#{profiles_url(self.requested_by.name)}</a> who just joined us!"

Upvotes: 1

Sam 山
Sam 山

Reputation: 42863

The simple answer is that you cannot. link_to is created from ActionPack where as models inherit from ActiveRecord.

A simple way around this is putting your link_to logic in your helpers.

For example:

app/views/index.html.erb

link_to_home

app/helpers/application_helper.rb

def link_to_home
    if root_url?
        "Home"
    elsif params[:controller] = "posts" && params[:action] == 'index'
        "Home"
    else
        link_to "Home", root_url
    end
end

This way if you have pagination on the index page and that is your root url it will not link to Home. But if you used link_to_unless_current it will link to home even though it is the same controller and action that execute link_to_unless_current. Doesn't really matter if this example doesn't make sense. It's the rails way to keep link_to logic in helpers.

If it is really necessary you could just create a string in your model that has regular HTML and then escape that in the view.

class Post < ActiveRecord::Base
    def link
        "<a href="#{url}">#{title}</a>"
    end
end

Then in your view you could have <%= @post.link %> and it would link to url and it would be called title assuming those were attributes on your @post object and you had something saved

Upvotes: 3

Related Questions