Reloading partial in an rails app - javascript

I want to reload a partial every 3 seconds on a 'new'-view in my rails app.
I have this in my new.html.erb
<h1>Controller#new</h1>
This is my static content
<%= render partial: 'dynamic' %>
More Static content
How do I get this partial reloaded every 3 seconds? Do I have to use unobtrusive javascript for this? How can I achieve this through ujs?

Put partial in div
<div class="dynamic"><%= render partial: 'dynamic' %></div>
You can do it by using jquery like this
$(document).ready(
function() {
setInterval(function() {
$('.dynamic').load('/controller_name/action_name');
}, 3000);
});
Now refresh partial in controller action for load new content
def action_name
render :partial => "directory_name/dynamic"
end
It will sure work.........

Related

Rails 5 using Kaminari twice on same page renders full page in partial

a controller action has two sets of data (originating form the same class, but drawn from different queries
#usercontents = Usercontent.where(contenttype_id > ?, 1).page params[:page]
#points = Usercontent.where(contenttype_id = ? ', 1]).page params[:page]
The views has partials who in turn invoke their own partials
<%= render 'points' %>
and
<%= render 'contents' %>
_contents.html.erb partial
<%= paginate #usercontents, remote: true, previous_label: t('navigate.previous'), next_label: t('navigate.next'), params: {anchor: 'panel3'} %>
<div id=usercontents class='tableize'>
<%= render partial: 'usercontents/usercontent', collection: #usercontents %>
</div>
_points_html.erb partial
<%= paginate #points, remote: true, previous_label: t('navigate.previous'), next_label: t('navigate.next'), params: {anchor: 'panel2'} %>
<div id=points class='tableize'>
<%= render partial: 'point', collection: #points %>
</div>
As the view alludes to, the pagination collections are in seperate tabulations of the page.
The end result is that pages do get paginated, but the call has three problems:
Instead of having a XHR call for just the collection, all assets are being invoked
rendering is not occuring for just the partial but the whole page (including stringified javascript!)
the pagination rendering is being placed after the partial, not in substitution of. calling another page just adds the new page to the end of previous block.
What is incorrect in this setup?

How to refresh the browser with JS after clicking a link_to tag in a Rails app

I'm trying to refresh the browser after the user clicks a link to an action that updates the database.
I want to avoid using redirect_back to prevent being sent back to the top of the screen after reload so I'm adding a JS click listener to the link_to tag with a code like this:
# in my view
<h5 class='my-link'><%= link_to 'vote', vote_path' %></h5>
# at the bottom of my application layout
<script>
$('.my-link').click(function (event) {
window.location.reload(true);
});
</script>
The JS code listener works OK in that if I click on any section of the h5 element the page will reload. However, when I click in the link the application will go to the relevant controller#action but the page wont reload.
I'm assuming I'm missing a way to execute first the link action and then force the refresh. So at click the app records a vote and then JS force a reload. Can you see any way I can achieve this? Thanks.
UPDATE
I some what solved this issue by adding a timer to the JS event so it gives time for the link to reach the controller and do the action and do the reload after it.
<script>
$(document).ready(function() {
$('.puke-icon, .clean-link, .comment-send').click(function() {
setTimeout(function(){
window.location.reload(true); },
50);
});
});
</script>
This is probably too hacky so hopefully you can provide more elegant approaches thanks!
In your vote controller action, use location.reload() in respond_to do format.
respond_to do |format|
format.js {render inline: "location.reload();" }
end
View:
<h5 class='my-link'><%= link_to 'vote', vote_path' %></h5>
Controller:
class VotesController < ApplicationController
def vote
----------------------
// your code goes here
----------------------
respond_to do |format|
format.js {render inline: "location.reload();" }
end
end
end
This will reload the page after the database action is completed.
$('.product').click(function () {
location.reload();
})
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.1.1/jquery.min.js"></script>
<script src="https://netdna.bootstrapcdn.com/bootstrap/3.0.0/js/bootstrap.min.js"></script>
<div class="container">
<div class="row" id="footerRow">
<div class="col-xs-12 product">
<h2>Product</h2>
<div>
</div>
</div>

Ruby on Rails: Pulling HTML string of specific element from within controller

If I have a view that is rendered with the following element:
View
<div id="content">
<!-- More HTML -->
</div>
In my controller, is there such a method where I could retrieve the HTML string of a specific element using its id? For example, it might look something like:
def myview
contentString = get_html_element_string("content")
...
end
where contentString would contain the value <div id="content"> <!-- More HTML --> </div> as a string.
I understand you can fetch the HTML of the whole rendered page using render_to_string, but I'd rather not parse through that.
It's not really possible to access the rendered content after the fact in the controller.
I would recommend creating a helper function to create the content that goes inside the content div. Then call the helper in the myview if you need it there.
The following post gives some options for calling a helper within a controller:
Rails - How to use a Helper Inside a Controller
I actually ended up putting the HTML I need within a partial and rendering it from within the controller (and again later in my view using <%= render partial: "content_partial" %>).
_content_partial.html.erb
<div id="content">
<!-- More HTML -->
<%= #my_value.function %>
</div>
And within my controller:
def myview
contentString = render_to_string(:partial => 'content_partial', :layout => false, :locals => {:my_object => #my_value})
...
end

rails render view onclick with javascript

I'm trying to create a view, where users can click on different buttons and render different content based on the buttons they click. I've tried getting this done with JS but can't really get it to work. I made a button in my view:
<div class="link">
<%= link_to "Greetings", "#" %>
</div>
<div id="show"></div>
then in job.js.erb:
$(function() {
$('.link').click(function() {
$('#show').append("<%=escape_javascript render(:partial => 'show' %>");
});
});
unfortunately render is not supported in assets, but I don't really know what the best way is to make this happen.
One way you can try is to let the button click go to a controller action, by AJAX, and then render the file with name <action_name>.js.erb. this file will then be able to call the render action.
I will expatiate more with the following:
Assuming the resource in question is Greetings and you have a dynamic_show action in the Greetings controller, for example, and you have a dynamic_show_greetings_path routing to this action.
From inside your view, you can have:
<div class="link">
<%= link_to "Greetings", dynamic_show_greetings_path, remote: true %>
</div>
<div id="show"></div>
and the Greetings#dynamic_show action will be like follow:
def dynamic_show
respond_to do |format|
format.js
end
end
then, in your view directory, you have a dynamic_show.js.erb file, which will contain the script to append the dynamic view as follow:
$('#show').html("<%=escape_javascript render(:partial => 'show') %>");
And that solves it for you!
Of course, to now make it dynamic, you have to then pass in params to the controller, and then render content based on the response gotten.
PS:
setting remote: true on the link ensures that the call will be an AJAX call.
controller actions by default renders the file with same name as the action name, therefore, dynamic_show responding to js will render dynamic_show.js.erb
Hope this throws a great light into it for you... ;)
It sounds like you need jQuery for this.
You can wrap the rendered partial in a parent div with a hide class. When the button is clicked toggle displaying the content.
http://api.jquery.com/show/
$('#your-button').click(function(e){
$('.hidden-div').toggleClass('hide');
});
There are two ways to do this.
Firstly, if you're wanting to load the JS on-page, you need to use what #anchalee suggested, and preload the content with some sort of "hide" class in the CSS:
#app/assets/javascripts/application.js
$(document).on("click", "a.hidden", function(e){
e.preventDefault();
el = $(this).attr("href");
$(el).toggle();
});
#app/views/controller/your_view.html.erb
<%= link_to "User", "#user", class: "hidden" %>
<div id="user" class="hidden">
Hello
</div>
This will take any divs with the id specified by the href attribute of the link, and then make it so that the div will hide or show depending on its current state.
--
Secondly, you have the off-page method (using ajax).
This is used to get data from the server, and will be where you'd load server-centric data such as what you're trying to do now.
Doing this is actually quite simple:
#app/controllers/your_controller.rb
class YourController < ApplicationController
layout: Proc.new{|c| !c.request.xhr? }
end
This will return any data you need without the layout:
#app/assets/javascripts/application.js
$(document).on("click", "#show", function(e){
e.preventDefault();
$.get($(this).attr("href"), function(data){
$("#show").html(data);
});
});
#app/views/your_controller/show.html.erb
<%= link_to "Show", [[url for page]], id: "show" %>

How to load partial into view when a link is clicked?

I have a list of user 'submissions' in my Rails app, and when a user submission is clicked, I would like the full submission to load into the view, without having to go to a new page.
Here's the code for the list of submissions:
<div id="submission-list-container">
<% current_user.submissions.each do |i| %>
<a href='#'>
<div id="post-container">
<%= i.title %>
</div>
</a>
<% end %>
</div>
The partial I have created, <%= render "show", :submission => i %>,, works fine, but I would like the full submission to be loaded into the view (index.html.erb), when that link above is clicked. Is there a good method for doing this? Should I just do something else like an AJAX call in JavaScript? I like these partials because it feels more clean and organized to seperate code.
My partial is pretty simple at the moment:
<%= submission.title %>
<%= dat_markdown(submission.content) %>
You can do this using a TitlePane in the Dojo Toolkit, and probably there's a similar widget with jQueryUI.
I can only speak to the Dojo Toolkit's version
You would do something like:
<div data-dojo-type="dijit/TitlePane" data-dojo-props="href: '/blah', title: '<%= submission.title %>', open: false">
You can include this in your application layout for lite usage of dojo, loaded from a CDN:
<script data-dojo-config="async: true, parseOnLoad: true"></script>
<script src="//ajax.googleapis.com/ajax/libs/dojo/1.9.1/dojo/dojo.js"></script>
The TitlePane is wired up so that when it is expanded, it will autoload the content that is provided to the href parameter.
While this isn't exactly a rails solution directly, it can be used as an alternative.
For a Rails Solution, you can simply use an AJAX call to a controller that renders the partial. You may even be able to hook it up using the
def blah
#submission = Submission.find(...)
respond_to do |format|
format.html # default render
format.js # js behavior
end
end
then a blah.html.erb
<%= render partial: 'submission/submission', object: #submission %>
with the partial
<div id='submission-<%= submission.id %>'>
<div id='submission-<%= submission.id %>-title'><%= link_to(submission.title, 'blah/blah', remote: true) %></div>
<div id='submission-<%= submission.id %>-content'></div>
</div>
and a blah.js.erb
$.get('/submission/content', function(data) { $('#submission-<%= #submission.id %>-content').html(data) } );
and an entry into the submissions_controller with route
def content
#submission = Submission.find(...)
render text: #submission.content
end
This probably isn't an exact solution, but hopefully it'll put you on the right path.

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