How do I defined a variable link_to to an external URL

Question

On my site a user has a personal profile with a link to his personal external website. The url of the sites I store in a postgresql database under the name website. When I test the result, I always get a url like this:

http://localhost:3000/www.example.com

instead of http://www.example.com

My view index.html.erb looks like this:

<% provide(:title, 'All projects') %>
<h1>All projects</h1>

<%= will_paginate %>

<ul class="microposts">
    <%= render @microposts %>
</ul>

<%= will_paginate %>

and my _micropost.html.erb like this:

<li>
    <span class="title"><%= micropost.title %></span>
    <span class="website"><%= link_to micropost.website, micropost.website %></span>
    <span class="content"><%= micropost.content %></span>
    <span class="timestamp">
        Posted <%= time_ago_in_words(micropost.created_at) %> ago.
    </span>
</li>

I don't know what's the problem in this case. If I set a @ before micropost.website it gives me an error undefined method `website' for nil:NilClass

Does anyone can help me (I'm a RoR beginner)?

KR, Fabian

Answer 1

It sounds like you are storing URLs without the http:// so they are being interpreted as relative URLs. You just need to do something like this:

link_to micropost.website, "http://#{micropost.website}" 

or maybe add a full_url method to that model that adds it if it's missing.

By the way, you can't use @micropost in that partial because it doesn't exist (you only have @microposts or micropost).

Answer 2

You can try with this below code:

<%= link_to "your label", "your link with http", :target => "_blank" %>

This will create a link that opens in a new tab.

Answer 3

You can do something like that:

link_to micropost.website, url_for(micropost.website)

See Rails Api: url_for

You can experiment in rails console. Just type in console:

micropost = Micropost.first
helper.link_to micropost.website, url_for(micropost.website)

And you see a result string.

Also you need to learn the difference between path and url helpers. See ruby on rails guide.

Goro rights. You need to add "http://" to your website attribute. After validating and before save Model instance to database you need to add this prefix.