I have a portfolio application built with Ruby 2.3.0 and Rails 5.0.0 that has links to external urls that work locally but do not work when deployed to Heroku.
<%= link_to image_tag(project.index_image), project.url %>
There are two different types of links that are not working and producing different symptoms.
External Application Links
In production the links to my other applications successfully redirect to the desired urls but the url's do not update in the browser to the new page.
Github links
The links to github do not work and redirect to a blank screen. That screen displays the following error in the developer console:
Refused to display 'https://github.com/my_repo' in a frame because an ancestor violates the following Content Security Policy directive: "frame-ancestors 'none'".
Try to creating a helper class for custom URL like below
On the helpers/application_helper.rb
def custom_link(image, url)
link_to image_tag(image), "#{url}"
end
And the view look like this
<%= custom_link project.index_image, project.url %>
This should work I hope because it's working my own.
Hope it helps
You can try the following:
<%= link_to project.url do %>
image_tag(project.index_image)
<% end %>
Related
I'm currently working with a mailer in which I need to link an index view. In my app, this is reachable by reminders_path, but when I used that in my mailer (<%= link_to "Memory Enhancer", reminders_path %>) the link didn't work.
After some googling and some SO searches, most things seemed to recommend something like this:
<%= link_to "Take Me To My Memory Enhancer", Rails.application.routes.url_helpers.url_for(controller: "reminders", action: "index") %>
However, the link still isn't functional. What is the "proper" rails way to do this?
Use reminders_url, as you want a full url, not just the path.
I ask myself the question does an pdf tag exist in rails 4 which can show
an pdf file very simple?
This solution answers me that i need to give the correct route informations:
<%= link_to 'Help', public_path%>
I already have an pdf file in my project directory app/assets/public/help.pdf
and now i wanna have a link with the simple name "Help" to have on my page.
Third edit:
After a nice first answer nothing changes and i get the same error message from rails. What i have to write in the routes.rb if i wanna use a link for my pdf file. Does anyone know how can i link an PDF from my own directory!?
In my experience with Rails, I've never seen a PDF link tag helper.
What you want, is to use asset_path in combination with link_to
<%= link_to 'Help', asset_path('data/help.pdf') %>
#=> Help
If it needs to be absolute, you could always use asset_url
<%= link_to 'Help', asset_url('data/help.pdf') %>
#=> Help
What I usually do for linking a document that can be public is I put the document in the public folder in rails and then use this for the path:
link_to 'Help', root_path << 'TheTitleOfYourPDF.pdf'
I'm a Ruby user, trying to make a web service that receives user's active request. I made a button, of which class is a "btn-send-alert". Then after the html code, I put a script function.
<div class="page-title">
<button class="btn-send-alert" style="background-color: transparent;">Help Request</button>
<p>Hello</p><br>
</div>
........
<script>
$(".btn-send-alert").click(function(){
alert('hello!');
<% Smalier.class_alert(#lesson,current_user).deliver_now %>
});
</script>
The problem is, the ruby code just start on its own even before I click this button.
And if I click this button, no email is delivered any longer.
Maybe in some point, I think I'm seriously wrong but I can't find where it is. Is there way that I can make this function work correctly?
Looking forward to seeing the response!
Best
Thanks to Rich, I am now able to write a code that works fine! The below code is that code.
<%= content_tag :div, class: "page-title" do %>
<%= button_to "Help Request", support_path, method: :get, remote: true, class:"btn btn-danger", params: { lesson_id: #lesson.id, user_id: current_user.id} %>
<%= content_tag :i, "wow!" %>
////
def support
#lesson = Lesson.find_by(:id => params[:lesson_id])
current_user = User.find_by(:id => params[:user_id])
mailer.class_alert(#lesson,current_user).deliver_now
end
Above code runs well!
I'm a Ruby user
Welcome to Rails!!
Stateless
Firstly, you need to understand that Rails applications - by virtue of running through HTTP - are stateless, meaning that "state" such as User or Account have to be re-established with each new action.
In short, this means that invoking actions/commands on your system have to be done through ajax or another form of server-connectivity.
Many native developers (native apps are stateful) don't understand how Rails / web apps are able to retain "state", and thus make a bunch of mistakes with their code.
receives user's active request
Even if you understand how to set up authentication inside a Rails app, it's important to understand the virtues of it being stateless... EG the above line means you have to have a user signed in and authenticated before you can send the request.
This forms one part of your problem (I'll explain in a second)
ERB
Secondly, the other problem you have is with the ERB nature of Rails.
the ruby code just start on its own even before I click this button.
This happens because you're including pure Ruby code in your front-end scripts. This means that whenever these scripts are loaded (triggered), they will fire.
The bottom line here is you need to put this script on your server. Otherwise it will just run...
Fixes
1. ERB
<%= content_tag :div, class: "page-title" do %>
<%= button_tag "Help Request", class:"btn-send-alert" %>
<%= content_tag :p, "Hello %>
<% end %>
You'll thank me in 1+ months.
Convention over Configuration means you use as many of the Rails helpers as you can. You don't need to go stupid with it, but the more "conventional" your code is, the better it will be for future developers to improve it.
Another tip - only use HTML for formatting; CSS for styling. Don't use <br> unless you actually want to break a line.
Another tip - never use inline styling - Rails has an adequate asset pipeline into which you should put all your CSS
--
2. Ajax
Secondly, your use of Javascript is incorrect.
More specifically, you're calling a server-based function inside front-end views. To explain this a little more, I'll show you the famed MVC image I post on here a lot:
This is how Rails works (MVC - Model View Controller) - this means that whenever you deal with your application, you have to accommodate a layer of abstraction between the user & your app -- the browser.
By its nature, the browser is not stateful - it stores session cookies which you have to authenticate on the server. You cannot call "server" code in the front-end HTML/JS.
This is why your Ruby code is firing without any interaction, although I'm not sure how it's able to fire in the asset pipeline.
If you want to make it work properly, you'll need to create a controller action to invoke the mailer send function, which you'll be able to do using the following setup:
#config/routes.rb
get :support, to: "application#support", as: :support -> url.com/support
#app/controllers/application_controller.rb
class ApplicationController < ActionController::Base
respond_to :js, only: :support
def support
Smalier.class_alert(#lesson.current_user).deliver_now
end
end
#app/views/controller/view.html.erb
<%= content_tag :div, class: "page-title" do %>
<%= button_to "Help Request", support_path, method: :get, class:"btn-send-alert" %>
<%= content_tag :p, "Hello" %>
<% end %>
#app/views/application/support.js.erb
alert ("Hello");
Each and every ruby code snippet embedded in ERB runs on server, in order to assemble a valid HTML or Javascript script for browsers to render.
Browsers don't understand ruby script at all, all they can understand is HTML and Javascript.
In your case (I'm supposing you're using rails since you tagged your question with ruby-on-rails), emails are delivered when rails engine is assembling HTML's.
If you want the emails being sent after the users click that button, the correct way is:
Define an action method in some controller, give it an URL (i.e. add a route in config/routes.rb), send email in that action.
When the button on the page is clicked, send an AJAX request to that URL.
My requirement is to add a link to mail sent from application developed in Ruby On Rails. Clicking that link in mail need to route user to that particular record in the application.
Can someone please help me with this some sample code.
In your view template use _url. E.g.:
<%= link_to 'Edit User', edit_user_url(#user) %>
it will return the complete URL.
You can use a simple link_to method in the mail or you could use a simple anchor tag. The latter you would have to build up.
If you need information on how to build links and paths check the rails guides. This has an example on the first section of the guide.
e.g. <%= link_to 'Patient Record', patient_path(#patient) %>
Besides this you need to provide more information if you want more help.
If you are starting with Ruby On Rails I would recommend looking at the videos on rails cast.
For your email problem you can look at sending-html-email
Also in the email I like to use the link_to helper like this
<%= link_to 'Click Me', something_url(#user.id), %>
I hope that this works. And Happy Coding
I'm trying to set up a simple atom feed from my Posts model and I'm running into translation problems between rails 2 and rails 3.
I tried to accomplish this task with two steps:
Added the <%= auto_discovery_link_tag(:atom) %> to my /views/layouts/application.html.erb file.
Created a /views/posts/index.atom.builder file. The file contains:
atom_feed do |feed|
feed.title("Daily Deal")
feed.updated(#posts.first.created_at)
#posts.each do |post|
feed.entry(post) do |entry|
entry.title(post.title)
entry.content(post.body, :type => 'html')
entry.author { |author| author.name("Justin Zollars")}
end
end
end
I see the RSS link in my browser, but the link opens with an error:
Too many redirects occurred trying to open
“feed:http://localhost:3000/posts”.
This might occur if you open a page
that is redirected to open another
page which then is redirected to open
the original page.
Where have I gone wrong?
Try specifying a path to the feed:
<%= auto_discovery_link_tag(:atom, posts_path(:atom)) %>
Maybe you need to specify the actual feed address?
auto_discovery_link_tag :atom, "http://mysite.com/posts.atom"
If you're using FeedBurner, you'll want to use that address instead.
Also, do you have some kind of before_filter blocking the access to that page?