This is what I'm currently using:
haml :login_signup, :layout => :'main'
From the login_signup haml file, I would like to pass the name of the JS file to be parsed inside the :main haml file.
Reason? layout main.haml contains jquery reference. Rest of the haml files use different JS scripts that require jquery to be sourced first.
What you describe sounds like content_for.
Here is how this works add something like this to your main (source):
= yield(:somejs)
And then fill it from the login_signup view:
- content_for(:somejs) do
= javascript_include_tag :foo
Since you tagged also Sinatra there is a plugin for that functionality: https://github.com/foca/sinatra-content-for
Related
Why naming convention of views files in rails are considered as action.html.erb only ( instead of action.erb.html ) ?
What will happen if we write views files as action.erb.html ?
What will happen if we write views files as action.erb.html?
The first thing that will happen is that the Ruby syntax highlighting in your editor will stop working as the file extension is now .html instead of .erb. On almost every file system in use the file extension is the rightmost part of the file name.
The second thing that will happen is that Rails will no longer be able to lookup the template and even if it could it would no longer process it through ERB as it no longer has the .erb file extension.
.html is just a segment of the file name that lets the rails template resolver distinguish between templates for different formats when looking up a template for a given request format. Its not really technically part of the extension. For example:
show.html # just HTML - no processing
show.html.erb # a HTML ERB template
show.html.slim # a HTML Slim template
show.html.haml # a HTML Haml template
show.xml.erb # a XML ERB template
show.xml.slim # a XML Slim template
show.xml.haml # a XML Haml template
show.json.erb # a JSON ERB template
show.json.jbuilder # a JSON jBuilder template
TRDL; changing the file extension is a dumb idea. Especially when you consider that Rails actually supports multiple template engines such as jbuilder, Slim and Haml in addition to ERB.
I have a Coffeescript view, something like widget.js.coffee which needs to include jQuery, as I can't be sure that jQuery is available. This idea is for other people to use the JS file, e.g.
<script src="http://my.rails.app/40/widget.js"></script>
My app already has jQuery via the asset pipeline, so I want to do the equivalent of the application.coffee manifest, where I can simply say something like:
#= require jquery
So far, it looks like I can output jQuery via so:
<%= Rails.application.assets["jquery"].source %>
but this seems to break the Coffeescript code (looks like there are backticks in the jQuery source).
I'm not sure the best way to proceed. Any thoughts on the best way to do this?
Make a .coffee file in the asset pipeline that includes all the libraries you require. Let's call it "widget.js.coffee" and it lives in assets/javascripts
In your controller, pull the generated source like so:
code = Rails.application.assets['widget'].source
Compress it
#js_libraries = Uglifier.compile code
Use it in your view. If your view is coffeescrtipt, make sure it is enclosed in backticks
<%= raw #js_libraries %>
There are HTML-file that contains JavaScript code. This JavaScript code loads an image and positioning it in a certain place. If failed, a message displays.
I need to include this file in template Slim.
I can include one Slim template to another by the following:
=render 'some/path/some_pattern'
How to include HTML- file to my template Slim?
The best way to add some javascript to your slim file is either by including the javascript file using
= javascript_include_tag 'name of the file'
or by directly adding the javascript code to your slim file, using
javascript:
code line 1
code line 2
...
I am dabbling in some existing code and I am able to render some HAML like this:
.content_container
%strong{:class => "code", :id => "message"} Hello World!
But when the page loads, this HTML is rendered in an existing layout with a lot of the elements already defined.
I looked in config/settings/environment.rb which I was suggested to do by a HAML tutorial, but there was no mention of any other HAML code there.
Any idea how I can overwrite the header or find where the template is predefined?
It sounds like the template is being rendered with a layout. look in <app_root>/app/views/layouts/ for your missing HTML.
HAML likes files in the views directory that have a haml extension.
The docs say:
...all view files with the ".html.haml" extension will be compiled using Haml.
I have a Rails 3.1 app that uses the codebrew/backbone-rails. In a .jst.ejs template, I would like to include an image, like so:
<img src="<%= image_path("foo.png") %>"/>
But of course the asset helpers are not available in JavaScript.
Chaining ERB (.jst.ejs.erb) does not work, because the EJS syntax conflicts with ERB.
Here is what I know:
The asset helpers are not available in the browser, so I need to run them on the server side.
I can work around the problem by making the server dump various asset paths into the HTML (through data attributes or <script> and JSON) and reading them back in JS, but this seems rather kludgy.
Is there a way to somehow use the asset helpers in EJS files?
There is a way, actually, to chain a .jst.ejs.erb file, although it's fairly undocumented, and I only found it through looking at the EJS test cases. You can tell EJS to use {{ }} (or [% %] or whatever else you want) instead of <% %>, and then ERB won't try to evaluate your EJS calls.
Make sure to require EJS somewhere in your code (I just included gem 'ejs' in my Gemfile), and then create an initializer (I called it ejs.rb) that includes the following:
EJS.evaluation_pattern = /\{\{([\s\S]+?)\}\}/
EJS.interpolation_pattern = /\{\{=([\s\S]+?)\}\}/
Then just make sure to rename your templates to .jst.ejs.erb, and replace your existing <% %> EJS-interpreted code with {{ }}. If you want to use something other than {{ }}, change the regular expressions in the initializer.
I wish there were an option in Sprockets to handle this through the config rather than having to explicitly include EJS, but as of the moment, there's no way to do that that I know of.
I can see two ways. Neither are great.
When you say <%%= variable %> then this is rendered by ERB as <%= variable %>, so you could double percent escape everything but the asset_tags and that would survive the trip through one ERB pass on the way to EJS.
If you find that too gross...
How about making a different javascript file, with an ERB extension, that defines your asset paths? And then use the asset pipeline to require that.
So say assets.js.erb defines something like:
MyAssets = {
'foo': <%= image_path("foo.png") %>,
...
}
And then require this somewhere near the top of your manifest. And then reference the globals however that works in EJS.
For those willing to try HAML instead of EJS: Using haml-coffee through haml_coffee_assets has worked well for me as well.
You can have the following in a .hamlc.erb file:
%img(src="<%= image_path('foo.png') %>")
(It still doesn't give you routing helpers though, only asset helpers.)
Ryan Fitzgerald was kind enough to post a gist of his JavaScript asset helpers (which get precompiled with ERB): https://gist.github.com/1406349
You can use corresponding Javascript helper via the following gem:
https://github.com/kavkaz/js_assets
Finally (after installing and configuring) you will be able to use it like this:
<img src="<%= asset_path("foo.png") %>"/>