My Ruby on Rails application always renders the layouts/application.html.erb view instead the views I want it to. Has anyone an Idea why that might be so?
My routes file looks like this:
Rails.application.routes.draw do
root 'startup#index'
resources :users
end
And my application_cotroller.rb is pretty much empty:
class ApplicationController < ActionController::Base
protect_from_forgery with: :exception
end
By default, a controller action in Rails renders the view template for your action, wrapped up into a layout (which is application/layout)
ActionView::TemplateHandlers manages the lookup for the extension (.html.erb, .html.haml, .json.erb, etc ...)
so, in an action called index, you will get this implicit call unless you call render yourself :
def edit
# your code
render action :'edit', layout: 'application/layout' # implicitly called
end
Rails will then start processing your layout and put the content of your edit template in place of any yield within your layout. Thus, a typical layout will look like this :
<!doctype html>
<head>
</head>
<body>
<!-- layout content before view -->
<%= yield %>
<!-- layout content after view -->
</body>
Related
This question is similar to (but not an exact duplicate of) Phoenix Framework - page titles per route.
Ideally, i want to create titles like in the described question, but I am using a root layout since my project uses Phoenix LiveView. The HTML skeleton including the head and title HTML tag are part of the root template (root.html.eex). The app template extends on that from my understanding. I implemented the code from the above question
<title>
<%= if Kernel.function_exported?(#view_module, :title, 2) do %>
<%= #view_module.title(Phoenix.Controller.action_name(#conn), assigns) %> - StHub
<% else %>
StHub
<% end %>
</title>
and created a title function inside of my specific page view
defmodule StHubWeb.WowsView do
use StHubWeb, :view
def title(_action, _assigns) do
"Dashboard"
end
end
but the else branch of the code is triggered. Upon further inspection, I think that the issue is with using a root template, because the #view_module while rendering the root template is StHubWeb.LayoutView, and only inside of the LayoutView/app.html.eex template, the #view_module is my actual view (StHubWeb.WowsView).
I am not sure how to solve this other than removing the root template, but then my LiveView will have to contain the entire HTML skeleton all the time.
Maybe there is a way for me to define a title function in my LayoutView that will grab the title from StHubWeb.WowsView, but I am not sure how to do that.
Thanks for the help!
I'm quite new to Ruby and ERB and for this case I'm using only Ruby and not rails.
E:\ruby
-app.rb
-plan.html.erb
-check.css
-track.js [js + jquery framework]
Inside app.rb I've the following lines
text = File.open(("final.html"), "w+")
text.puts ERB.new(File.read("plan.html.erb")).result binding
I'm not sure how to call the .js and .css files inside the .html.erb file. Kindly let me know if I've to post the .html.erb file in case that would be helpful to debug further, thanks.
You can include the JavaScript in the .html.erb file in the same way you load the text file. The simplest (code wise) solution is doing something along the lines of this:
plan.html.erb
<script>
<%= File.read('some/file.js') %>
</script>
However if you are expecting a <script src="some/file.js"></script> as result you'll have to create your own helper or use an existing one from some light weight web framework. A simple example might be:
lib/html_helpers.rb
require 'builder'
module HtmlHelpers
def javascript_include_tag(path)
Builder::XmlMarkup.new.script('', src: path)
#=> %{<script src="#{html_escaped_path}"></script>}
end
end
plan.html.erb
<% require 'html_helpers' %>
<% include HtmlHelpers %>
<%= javascript_include_tag('some/file.js') %>
Keep in mind that the first solution doesn't escape any HTML characters. Meaning that if your script contains </script> everything following that tag will be interpreted as HTML.
In Middleman, I am trying to set up a blog site, using custom layout for the blog. My problem is that the main layout is loading, but the blog layout for my articles is not. The article files are being served in with their plain body.
In source/layouts/ I have two files: layout.erb and article_layout.erb.
My intent is to use article_layout.erb for my blog articles.
In config.rb I have the following:
activate :blog do |blog|
blog.sources = "articles/{category}/{year}-{month}-{day}-{title}.html"
blog.layout = "article_layout"
end
I have also tried moving article_layout.erb to source/articles/ as well as prepending the config.rb file like this: blog.layout = "layouts/article_layout"
Another failed approach is to comment out the above option and configure the layout by adding this line instead: page "/articles/*", layout: "article_layout".
So far none of these approach show a difference. Since the default layout is not being rendered I would expect some sort of error message if the path to the layout cannot be found, but nothing shows up.
I managed to replicate your problem with my own Middleman blog setup.
The docs are unclear on this because there is a broken link in the layout section of Blogging.
You need to use the nested layout feature of Middleman and wrap your custom layout in:
<% wrap_layout :layout do %>
<% end %>
So your article_layout.erb would look something like this:
<% wrap_layout :layout do %>
<div class="article-container">
<article>
<h2 class="article-title"><%= current_page.title %></h2>
<%= yield %>
</article>
</div>
<% end %>
And keep your custom layout in the source/layouts folder.
Here are the docs for Nested Layouts for your reference.
I hope this helps.
Sinatra has sinatra/contrib to asist with this, what's the equivalent in Ramaze? I'm using Erubis by the way. Also, a quick Google search shows up really old pages that insist setting variables in the controllers and using them in the views.
Edit 1:
Taken from the gem documentation (http://www.sinatrarb.com/contrib/content_for.html)
You call content_for, generally from a view, to capture a block of markup giving it an identifier:
# index.erb
<% content_for :some_key do %>
<chunk of="html">...</chunk>
<% end %>
Then, you call yield_content with that identifier, generally from a layout, to render the captured block:
# layout.erb
<%= yield_content :some_key %>
I don't think Ramaze can do this natively. But you could quite easily do this manually, write a helper to do this, or even fill-in a Hash instance.
You might also want to look at partials if you need to render small chunks of HTML in loops.
You could also combine render_partial, store results in a hash, and yield it's content in the layout.
If the use case is something like rendering a sidebar, you probably want to write a helper so you take the logic out of your views.
A trivial example is here : https://github.com/Ramaze/ramaze/wiki/Adding-a-dynamic-sidebar-in-a-layout
I am building a website with Sinatra and ERB templates. Within the ERB I would like to access the name of the page being loaded and change a small part of the layout accordingly.
For example, my routes are like:
get '/' do
erb :index
end
I need something like:
<% unless page_is_index %>
<!-- HTML goes here -->
<% end %>
There's no direct relation in Sinatra between routing and controllers, so there isn't current_controller and current_action helpers like in Rails. What you can do is checking request.path.
You can specify a different layout which makes the changes you need. If nothing else, this layout could just include the main layout with more options.
get '/' do
erb :index, :layout => 'index_layout'
end