I need to conditionally use the remotipart gem. The [docs][1] say just add it to application.js:
//= require jquery.remotipart
But I don't want it to be included with every single view, instead I want to conditionally include it, however when I try:
<%= javascript_include_tag "jquery.remotipart" %>
I get an error. How do i reference a js included as part of a gem generically, and remotipart js specifically?
Thanks,
Kevin
But I don't want it to be included with every single view, instead I want to conditionally include it, however when I try:
What means conditionally in this context? The most simplest way would be
<%= javascript_include_tag "jquery.remotipart" if condition %>
Also you could use content_for like this on the views where you want to include it:
# in your view
<% content_for :js do %>
<%= javascript_include_tag "jquery.remotipart" %>
<% end %>
# in your layout.html.erb
<%= yield :script %>
https://apidock.com/rails/ActionView/Helpers/CaptureHelper/content_for
If you meant that you get an error that the JS file can't be found, please update your question with what library (webpacker, sprockets) and Rails version you use.
Im trying to implement an Ajax call with the will_paginate gem, I found this guide http://ramblinglabs.com/blog/2011/11/rails-3-1-will_paginate-and-ajax which seemed like a simple solution, though it includes coffeescript which i am not familiar with, so if anyone has a different solution then please advise..
My code is as follows
My View
<div class="container">
<div class="row">
<div id="userRecipes">
<%= render partial: 'userrecipes' %>
</div>
</div><!--/row-->
My partial (userrecipes)
<% #recipes.each do |r| %>
<div class="span3">
<div class="thumbnail">
<%= image_tag r.avatar.url(:myrecipes) %>
</div>
<h4><%= link_to r.dish_name, r %></h4>
<hr>
<p><%= truncate r.description, :length => 90 %></p>
<p><%= link_to "Edit Recipe", edit_recipe_path(r.id) %></p>
<p><%= link_to "Delete Recipe", recipe_path(r.id), :confirm => "Are you sure?", :method => :delete %></p>
<p><%= link_to "Add to favorites", {:controller => 'favourites', :action => 'create', :recipe_id => r.id}, {:method => :post } %></p>
</div><!--/span3-->
<% end %>
<%= will_paginate #recipes %>
updated userrecipes.js.erb file
$('#userRecipes').html('<%= escape_javascript(render partial: 'userrecipes') %>');
$.setAjaxPagination();
Coffeescript
$ ->
$.setAjaxPagination = ->
$('.pagination a').click (event) ->
event.preventDefault()
loading = $ '<div id="loading" style="display: none;"><span><img src="/assets/loading.gif" alt="cargando..."/></span></div>'
$('.other_images').prepend loading
loading.fadeIn()
$.ajax type: 'GET', url: $(#).attr('href'), dataType: 'script', success: (-> loading.fadeOut -> loading.remove())
false
$.setAjaxPagination()
When i click on the next anchor tag to show the next set of results the page stays as it is and no new content appears
When using the console to see if there are any errors i can see any, the output is
GET http://localhost:3000/my_recipes?page=2&_=1355055997639
Am i missing something here? or is there an issue with my userrecipes.js.erb file because in other Ajax examples i have seen thy are using escape_javascript when rendering the partial?
Edit
Whilst inspecting the response in the console it is also showing that the new recipes to be loaded are being loaded but nothing is happening in the view
Any pointers appreciated
Thanks
Why not try a simpler approach, create a new helper (ex. app/helpers/will_paginate_helper.rb) with the following content:
module WillPaginateHelper
class WillPaginateJSLinkRenderer < WillPaginate::ActionView::LinkRenderer
def prepare(collection, options, template)
options[:params] ||= {}
options[:params]['_'] = nil
super(collection, options, template)
end
protected
def link(text, target, attributes = {})
if target.is_a? Fixnum
attributes[:rel] = rel_value(target)
target = url(target)
end
#template.link_to(target, attributes.merge(remote: true)) do
text.to_s.html_safe
end
end
end
def js_will_paginate(collection, options = {})
will_paginate(collection, options.merge(:renderer => WillPaginateHelper::WillPaginateJSLinkRenderer))
end
end
Then in your view use this tag for ajax pagination:
<%= js_will_paginate #recipes %>
Remember that the pagination links will include existing params of the url, you can exclude these as shown below. This is standard will paginate functionality:
<%= js_will_paginate #recipes, :params => { :my_excluded_param => nil } %>
Hope that solves your problem.
Explanation:
Will_paginate allows you to create your own custom renderer. The WillPaginateJSLinkRenderer is such a custom renderer and this class could be defined anywhere, it doesn't have to be defined inside the helper module. The custom renderer extends the standard renderer (LinkRenderer) and redefines only two methods.
The prepare method is overriden to explicitly remove the cache buster parameter since will_paginate creates the page urls with all parameters that were present when rendering the page and we do not want to reuse the cache buster parameter.
The link method is a copy paste from the original LinkRenderer source code but creates a link with remote: true to make it a JS resquest.
Finally the js_will_paginate method is a standard view helper method to call the normal will_paginate view helper method but adds our custom renderer to the options so that it will be used instead of the normal renderer.
Just in case someone is looking for Rails 4 solution. I liked the answer from Pierre Pretorius, but it failed for me on 4.1.1 with "method undefined" for link_to_function on the line:
#template.link_to_function(text.to_s.html_safe, ajax_call, attributes)
I just replaced the line to:
#template.link_to(text.to_s.html_safe, '#', attributes.merge(:onclick => "#{ajax_call} event.preventDefault();"))
I hope it may help someone.
You are not escaping javascripts in your js.erb, it should be the problem.
$('#userRecipes').html('<%= escape_javascript(render partial: 'userrecipes') %>');
$.setAjaxPagination();
The ajax_will_paginate is a superb method, but unfortunately it was messing up the UI of the paginate. I had employed another javascript method for more flexibility. And I call this method on pageRender.
function checkForAjaxPaginate(controller,make_ajax){
var href = "";
$(".pagination").find("ul").each(function(){
$(this).find("li").each(function(){
$(this).find("a").each(function(){
href = $(this).attr("href");
if(href.indexOf(controller+".js") != -1){
if(make_ajax){
$(this).attr("data-remote","true");
}
else{
$(this).attr("href",href.replace(".js",""));
}
}
});
});
});
}
For more flexibility, you just pass the action name in the "controller" variable and pass true to make_ajax if you want to convert it to ajax. All I am doing is to check if the href link is ".js", and if make_ajax is true, then adding an attr "data-remote=true", which in our ROR app makes it ajax. if make_ajax is not true then am just removing the ".js" so the code does not mess.
I hope this helps
Pierre Pretorius' answer is great, but I had to do a little more to make it work for me that wasn't already clear. Maybe this will be helpful to other beginners.
In addition to making that helper and using the js_will_paginate tag I did this:
After moving the content I was trying to paginate into a partial (_recipes.html.erb in the case above), I also created a show.js.erb file (in this same view alongside the partial) with text similar to this:
$('#recipes').html('<%= escape_javascript(render partial: 'recipes') %>');
Then I had to move the js_will_paginate tag to the partial as well at the bottom (so it would be updated as I paginated through or clicked next/previous). Then I had to wrap the render partial helper in the div id you're targeting in the js file, so in this example:
<div id="recipes">
<%= render partial: "recipes" %>
</div>
This may have been very clear to others, but I wasn't sure which steps from the OP had to remain and which were unnecessary. These steps worked for me. You don't need to add respond_to js in the controller as the helper takes care of that or have a coffeescript file.
Base on 'Agile Web Development with Rails, Third Edition', I created a cart with Ajax, but Ajax isn't working for me. My code is as follows:
/store/index.html.erb：
<%= form_tag({:action=>'add_to_cart', :id=>product}, :remote=>true ) do %>
<%= submit_tag "Add to Cart" %>
<% end %>
/layouts/store.html.erb：
<head>
...
<%= javascript_include_tag :defults %>
...
</head>
/controllers/store_controller.rb：
def add_to_cart
...
respond_to do |format|
format.js
end
...
end
add_to_cart.js.rjs
page.replace_html("cart",:partial => "cart", :object=>#cart)
Rails 3.1, Ruby 1.9.3.
js templates are named as name.js.erb in Rails 3.
Let me assume you are going to replace "cart" div in ajax call and you have jQuery.
create add_to_cart.js.erb with the following code.
$("#cart").replaceWith('<%=escape_javascript(render :partial => 'cart', :object=>#cart) %>');
RJS isn't a part of Rails any more. You can use jQuery instead without any additional download required: just don't use the .rjs at the end. If you know CoffeeScript, it's also available here: name your file *.coffee and you are done. Also you can name it *.coffee.erb to allow the ERb to preprocess you file but this feature is allowed by default even for simple *.coffee-files.
UPD:
page.replace_html("cart",:partial => "cart", :object=>#cart)
Should become:
$("#cart").html("<%= j render(#cart) %>")
If there a way to include the content of a javascript file into a Rails view?
I know about Ruby's File.read, but I'm searching for some helper already done.
<%= javascript_tag do %>
<%= render :file => '/path/to/rails/app/path/to/javascript.js' %>
<% end %>
So you can include any javascript code located on your machine. But to be honest there's more appropriate way to do that kind of things.
Is there some way to output an action in Rails template? Something equivalent to ASP.NET MVC Html.RenderAction ?
I need to render some stuff in sidebar and I don't want to put queries in partials or specific controller. So far I can think of only one way - put something into #stuff (by whatever means) instance var and let render find the proper partial or specify it explicitly. It would be better to be able to change only one file to change the contents of sidebar (as in ASP).
Yes, there is. You can add the "sidebar" partial to the application layout (in the app/views/layouts folder).
You can put the code that gets the "sidebar" variables in a before_filter in the ApplicationController
class ApplicationController < ActionController::Base
before_filter :sidebar_function
have a look at
http://guides.rubyonrails.org/layouts_and_rendering.html
especially read the subitem
http://guides.rubyonrails.org/layouts_and_rendering.html#using-content_for
I do not know ASP.net, however, I think Rails yield might be the solution. Here is a small example:
view:
<% content_for :one do %>
Test one
<% end %>
<% content_for :two do %>
Test two
<% end %>
<p>Hi</p>
application.html.erb
<%= yield :one %>
<%= yield %>
<%= yield :two %>
See Railsguides: http://guides.rubyonrails.org/layouts_and_rendering.html#understanding-yield