Adding custom javascript

[tobyhede]

I was wondering if there was a mechanism for adding custom javascript to the admin UI?
Was thinking it might be a useful way of injecting features without requiring massive updates of the ruby code?

An example would be adding a plugin like jquery chosen [http://harvesthq.github.com/chosen/] to enhance certain filters and drop downs on forms.

[panva]

There is such mechanism, all you need to do is read the docs or browse to the config file in your project

[tobyhede]

right, awesome, cheers

[tobyhede]

is there other documentation than here: http://activeadmin.info/documentation.html

[panva]

just check the active_admin.rb file

# config/active_admin.rb

# == Register Stylesheets & Javascripts
#
# We recommend using the built in Active Admin layout and loading
# up your own stylesheets / javascripts to customize the look
# and feel.
#
# To load a stylesheet:
  config.register_stylesheet 'my_stylesheet.css'
#
# To load a javascript file:
  config.register_javascript 'my_javascript.js'

[wejrowski]

How would you do this on certain pages only though?

[mull]

It would indeed be lovely to be able to insert javascript on only certain pages. @wejrowski did you come up with a good solution?

[wejrowski]

No I have not.. I basically just have a bunch of jquery that applies events and changes to specific elements that won't get called if they don't exist.

[benben]

would love to see a possibilty to include js only on certain pages/views! :)

[scottbaggett]

+1 for per-page javascript/css

[carlos-a-crespo]

+1 for per-page javascript/css too...

[ffscalco]

+1 for per-page javascript/css

[haikoschol]

+1 for per-page javascript/css

[seanlinsley]

You guys do realize that this is the going against rails best practices, right? The asset pipeline compiles all of your JS into a single file so it's more efficient for the client to grab. If you still want this feature, you can always call javascript_include_tag from a partial.

Note that you can also scope JS to only act upon pages based on the URL (document.location.href).

Last of all, here's some info specific to the asset pipeline.

[haikoschol]

Understood. The scoping is what I started to do, but then I found a way to achieve what I needed without any JavaScript.

[unrealhoang]

@haikoschol can you share your solution here?
I also tried to use Paul Irish's solution but i don't know if there is a way to add those data-* to the body element of active admin.
http://viget.com/inspire/extending-paul-irishs-comprehensive-dom-ready-execution

[haikoschol]

@unrealhoang Unfortunately I don't even remember what exactly the problem was I tried to solve with per-page JavaScript, let alone where to look for my workaround in the code. But it didn't involve any JavaScript, so it probably wouldn't be useful to you anyway.

[loicginoux]

This is how I manage to run certain piece of javascript per page:

in app/assets/active_admin.js:

//= require jquery
//= require jquery_ujs
//= require jquery-ui
//= require ./init
// = require_tree ./admin

in app/assets/init.js:

// initialize your global object will all your model names
YOUR_APP = {
    contracts:{},
    products:{},
    purchases:{},
    rentals:{},
    users:{}
}

jQuery(document).ready(function($) {
       // get the page action
    var action,model, b = $("body");
    if (b.hasClass("edit")) {
        action = "edit";
    } else if(b.hasClass("view")){
        action = "view";
    } else if(b.hasClass("index")){
        action = "index"
    } else if(b.hasClass("new")){
        action = "new"
    }

        // run the code specific to a model and an action
    for (var m in YOUR_APP) {
        if (b.hasClass("admin_"+m)) {
            if (YOUR_APP[m][action] && typeof YOUR_APP[m][action] == "function") {
                YOUR_APP[m][action]();
                break;
            }
        }
    }
});

And then inside my directory app/assets/admin I have one js file per model with for example for the user model something like that:
in app/assets/admin/user/js

YOUR_APP.users = {
    index: function() { alert("this code run only on the user index page"); },
    view: function() { alert("this code run only on the user view page"); },
    edit: function() { alert("this code run only on the user edit page"); }
};

I hope this will be useful for those who are looking for a solution. It's not the best but it works.

[seanlinsley]

Interesting approach @loicginoux

[batamire]

@unrealhoang this is how I did it: app/admin/layout_hacks.rb

# ruby 2.0 only, visit link below for more information
# http://stackoverflow.com/questions/4470108/when-monkey-patching-a-method-can-you-call-the-overridden-method-from-the-new-i
module ActiveAdmin::Views::Pages::BaseExtension
  def add_classes_to_body
    super
    @body.set_attribute "data-controller", params[:controller].gsub(/^admin\//, '')
    @body.set_attribute "data-action",     params[:action]
  end
end
class ActiveAdmin::Views::Pages::Base
  # mixes in the module directly below the class
  prepend ActiveAdmin::Views::Pages::BaseExtension
end

[apoorvparijat]

Compiling the solutions by @batamire and @loicginoux

# app/admin/layout_hacks.rb

module ActiveAdmin::Views::Pages::BaseExtension
  def add_classes_to_body
    super
    @body.set_attribute "data-controller", params[:controller].gsub(/^admin\//, '')
    @body.set_attribute "data-action",     params[:action]
  end
end
class ActiveAdmin::Views::Pages::Base
  # mixes in the module directly below the class
  prepend ActiveAdmin::Views::Pages::BaseExtension
end

# app/assets/javascripts/active_admin.js.coffee

#= require active_admin/base
ActiveAdmin = {
  dashboard: {},
  user: {}
}

ActiveAdmin.dashboard.index = () ->
  console.log 'Hello'

$(() ->
  controller = $('body').data('controller')
  action = $('body').data('action')
  ActiveAdmin[controller][action]() if ActiveAdmin[controller][action]?
)

[ivanyv]

My hack to add scripts at the top (added at the top of the ActiveAdmin initializer):

Rails.application.config.after_initialize do
  javascripts = [] 
  javascripts << "//maps.googleapis.com/maps/api/js?sensor=false&key="
  javascripts += ActiveAdmin.application.javascripts.to_a
  ActiveAdmin.application.javascripts.replace javascripts
end

[serradura]

@ivanyv You can do this too.

Add in your config/initializers/active_admin.rb.

ActiveAdmin.setup do |config|

  config.register_stylesheet "//cdn.foo.net/example.css"

  config.register_javascript "//cdn.foo.net/example.js"

  # ...
end

[ivanyv]

@serradura Yeah but that appends the scripts at the bottom and some scripts I need at the top.

[serradura]

@ivanyv I understood now. Thanks for sharing! 😄

[workgena]

My solution to load additional JS before closing </body> tag, for each controller:

Create file /lib/active_admin/views/footer.rb

module ActiveAdmin
  module Views
    class Footer < Component

      private

      def powered_by_message
        para I18n.t('active_admin.powered_by', active_admin: link_to("Active Admin", "http://www.activeadmin.info"), version: ActiveAdmin::VERSION).html_safe

        if MyApplicationName::Application.assets.find_asset("ui/#{params[:controller]}.js")
          render text: javascript_include_tag("ui/#{params[:controller]}")
        end
      end

    end
  end
end

This will patch AA-view with our code. It includes JS-file it it exists.

For example we have controller /app/admin/customer.rb

ActiveAdmin.register Customer, as: 'Customer' do
  # ...
end

Then create relevant JS-file:
/app/assets/javascripts/ui/admin/customers.js

alert('controller_name is: admin/customers');

This works in development mode.

To get this work in production you need:

1. in application.js and active_admin.js not to use "require_tree ." (IMPORTANT)
2. /config/environments/production.rb add this

config.assets.precompile += %w(ui/admin/*.js)

Compile assets with:
RAILS_ENV=production bundle exec rake assets:precompile

[jtomaszewski]

My solution:

ActiveAdmin::Views::Pages::Base.class_eval do
  def build_active_admin_head_with_js_script
    build_active_admin_head_without_js_script
    add_js_config_to_head
  end

  def add_js_config_to_head
    within @head do
      script """
      I18n = window.I18n || {};
      I18n.defaultLocale = \"en\";
      I18n.locale = \"#{I18n.locale}\";
      """.html_safe
    end
  end

  alias_method_chain :build_active_admin_head, :js_script
end

[yaaase]

Since config.register_javascript now appears deprecated, is there a prescribed mechanism for including an external JS? Specifically google maps, with a key.

[dchersey]

I think you may be able to use arbre script tags to link in the google map scripts, and initialize.

for example

    script src: 'url for google maps'

and for inline initialization

    script do
      raw '$(document).ready(function($) {console.log("insert page initialization code here");})'
    end

[rivella50]

And if you need to use ruby variables in the script part switch the quotation marks:

script do
    raw "$('.link-delete').bind('ajax:complete', function() {
      $('#content').load('#{customer_id}/customer_data');
    });"
end

[davidwparker]

Is there a way to add JS per namespace?

[Ritesh-Katare]

@dchersey @rivella50 Thanks for inline js stuff,
Could you please help to append html element from inline js in active admin with "script" helper?