I'm new to rails and what I'm trying to do is the following:
I'm creating a store and unstore button to save and 'un-save' the event respectively. I used my event attributes and current user to find that stored event. By using ajax and remote functionality of rails I will able to change the behavior of the button from store to unstore or vise versa.
In my _feed.html.erb.
<% if #feed_items.any? %>
<ul>
<%= render partial: 'shared/feed_item', collection: #feed_items %>
</ul>
<% end %>
Each #feed_items contains set of data (title, category, etc).
In my _feed_item.html.erb.
<li id="<%= feed_item.id %>" class="item">
...
<div class="small-3 text-center columns">
<%= render 'shared/store_form', event: feed_item %>
</div>
...
</li>
Event symbol sends that feed_item to the store_form.
In my _store_form.html.erb.
<div id="store_form_<%= event.id %>">
<% if event.stored?(current_user) %>
<%= render 'shared/unstore', event: event %>
<% else %>
<%= render 'shared/store', event: event %>
<% end %>
</div>
I pass again a feed_item into partial.
_store.html.erb
<%= form_for(event.storages.build(saver_id: current_user.id,
organizer_id: event.user_id),
remote: true) do |f| %>
<div>
<%= f.hidden_field :organizer_id %>
<%= f.hidden_field :saved_id, value: event.id %>
</div>
<%= f.submit "store" %>
<% end %>
_unstore.html.erb
<%= form_for(event.storages.find_by(saver_id: current_user.id,
organizer_id: event.user_id) ,
html: { method: :delete },
remote: true) do |f| %>
<%= f.submit 'unstore' %>
<% end %>
create.js.erb
$("#store_form").html("<%= escape_javascript(render 'shared/store', event: event )%>")
destroy.js.erb
$("#store_form").html("<%= escape_javascript(render 'shared/unstore', event: event) %>")
And I'm getting these errors when clicking store/unstore event.
ActionView::Template::Error (undefined local variable or method `event' for #<#<Class:0x00000004d69be8>:0x00000004d68d10>):
1: $("#store_form").html("<%= escape_javascript(render 'shared/unstore', event: event) %>")
ActionView::Template::Error (undefined local variable or method `event' for #<#<Class:0x00000004d69be8>:0x00000004fdc6a0>):
1: $("#store_form").html("<%= escape_javascript(render 'shared/store', event: event )%>")
My question is, how can I pass that specific "event" data into the partial. I can't used #feed_item onto the create and destroy js because feed_item have the set of events. Is there any better approach to handle this?
In your action create and delete in the controller you should instantiate your variable event: change event by #event and change your js to:
$("#store_form").html("<%= escape_javascript(render 'shared/unstore') %>
because you don´t need add instantiate vars to render calls, rails is doing for you
Related
In my program one Board can have many Sections. On Boards#show I list all Sections for this Board. A user can create, edit and delete Sections for Boards this user has created.
I use Pundit for my authorizations.
My problem is that after having added AJAX to the create Section action, my policy checks don't work anymore. The AJAX call is working fine in that Sections are added but the "Edit" and "Delete" links are only displayed after I reload the page.
Boards#show
<% if policy(#board).edit? %>
<p><strong>Create a new Section</strong></p>
<%= render 'sections/shared/form', board: #board, section: #section %>
<% end %>
<br>
<p><strong>Sections</strong></p>
<div id="sections">
<% #board.sections.order(id: :asc).each_with_index do |section, index| %>
<span><%= "#{index + 1}. #{section.title}" %></span>
<% if policy(section).edit? %>
<%= link_to "Edit", edit_board_section_path(#board, #board.sections[index]) %>
<% end %>
<% if policy(section).destroy? %>
<%= link_to("Delete", board_section_path(#board, #board.sections[index]), method: :delete) %>
<% end %>
<br>
<% end %>
</div>
Form partial
<%= simple_form_for([#board, #section], remote: true, authenticity_token: true) do |f| %>
<%= f.input :title, id: "section_title" %>
<%= f.submit "Save" %>
<% end %>
AJAX call
var newSection = "<span><%= "#{#board.sections.length}. #{#section.title}" %></span><br>";
var sections = document.getElementById('sections');
sections.insertAdjacentHTML('beforeend', newSection);
var sectionTitle = document.getElementById('section_title');
sectionTitle.value = '';
I think the problem is that the newly created Section isn't inserted into the loop and thus the policy cannot be checked. How could I refactor my code to solve this?
You should be able to render you HTML templates into your js.erb file. See the post from the DHH https://signalvnoise.com/posts/3697-server-generated-javascript-responses how to use this properly. It is an older post so maybe some things changed but you should know what to search for. But if it still works this way, you should be able to do something like this:
Extract section to a partial _section.html.erb
<span><%= "#{index + 1}. #{section.title}" %></span>
<% if policy(section).edit? %>
<%= link_to "Edit", edit_board_section_path(#board, #board.sections[index]) %>
<% end %>
<% if policy(section).destroy? %>
<%= link_to("Delete", board_section_path(#board, #board.sections[index]), method: :delete) %>
<% end %>
<br>
Use this partial also in your Boards#show file.
Render your partial in the js.erb file
var newSection = "<span><%=j render #section %></span><br>";
Something like this should work, but I don't use server generated javascripts so they could have changed some things. But hopefully it will help you at least with the direction.
I wish to reload a partial-form with a button(Add). I'm new and don't know how to simply display fields in partial like listings one under the other as many times Add button is clicked. I can't find a relevant example. all AJAX examples mention js.erb when object is saved in DB.
<div class="panel-body">
<%= render partial: "degrees/form", :locals => { :f => f } %>
<%= f.link_to (fa_icon 'plus').to_s + " Add Another Qualification ", render(:partial => 'degrees/form', :locals => { :f => f }), class: "btn btn-primary" %>
</div>
Here, #application is the main form trying to display degree fields. Partial is simply two text-fields- one for selecting educational degree and second its detail.Here's partial
<%= f.fields_for [Degree.new], :url => { :action => "index" } do |ff| %>
<div class = "form-group" }>
<%= ff.select :level, options_for_select(Job::EDUCATION, params[:level]), include_blank: "Select Degree", class: 'span-2' %>
<%= ff.text_field :description, :class => 'span5' %>
</div>
<% ff.submit "Add Another Degree", class: 'btn btn-primary' %>
You don't necessary need to save things to pass away to .js.erb... you can just instantiate...
But if your example is precise, you are missing the remote: true flag for the link... And the partial is not defined on the link... you need to make a view responding to the ajax...
Form example
<div class="panel-body">
<%= link_to new_thing_path, remote: true do %>
<i class="fa fa-plus">
Add another qualification
<% end %>
<div class="new-things-container">
</div>
</div>
Controller answering to the ajax request
class ThingsController < ApplicationController
def new
#thing = Thing.new
respond_with #thing
end
end
View for the ajax request rendering a partial inside a specified div
//views/things/new.js.erb
$('.panel-body .new-things-controller').append("<%= render partial: 'degrees/form', locals: { thing: #thing } %>")
When a store is selected I would only like to see the taxonomies that belong to the selected store. Does anyone have any idea how I might do this? Either with Ruby or Javascript
<h3>Stores Offered In</h3>
<ul class="multi-column-checkbox">
<% for store in Store.all %>
<li><%= check_box_tag "idea[store_ids][]", store.id,
#idea.stores.include?(store) %> <%= store.name %></li>
<% end %>
</ul>
<br />
<h3>Taxonomies Offered In</h3>
<% for store in Store.all %>
<% if store.has_taxonomies? %>
<ul class="multi-column-checkbox">
<h4><%= store.name %></h4>
<% for taxonomy in store.taxonomies %>
<li><%= check_box_tag "idea[taxonomy_ids][]",
taxonomy.id, #idea.taxonomies.include?(taxonomy) %> <%= taxonomy.name %></li>
<% end %>
</ul>
<% end %>
<% end %>
Ok -- lots going on here. First of all, I'm making the assumption that you're using rails 3 or rails 4
Also it looks like this is nested into the ideas model, which not taken into account here, you'll have to modify the code for that.
Firstly - Try not to make calls directly to a model in a view unless you absolutely have to, that should be done in your controller. Also, in your view make sure you have a binding element for taxonomies for the jquery call you'll make later.
your_main_view_referenced_in_your_question.html.erb
<h3>Stores Offered In</h3>
<ul class="multi-column-checkbox">
<%- #stores.each do |store| %>
<li>
<%= check_box_tag "store[ids]", store.id, false, :data => {:remote => true, :url => url_for( :action => 'get_taxonomies', :id => store.id ), :method => :put}, :class => 'input-large' %>
<%= store.name %>
</li>
<% end %>
</ul>
<br/>
<div id="taxonomies">
</div>
Next you need to create a controller action to respond to your ajax call.
stores_controller.rb
### Add an action to let you do an ajax call
def get_taxonomies
#store = Store.find params[:id]
end
Now you need to create a ujs file that is rendered from your controller action In my example I named the controller action get_taxonomies so by default the view rendered will be get_taxonimies.js.erb
get_taxonomies.js.erb
if ($(".store_" + <%= params[:id] %>).length) {
$(".store_" + <%= params[:id ] %>).remove();
} else {
$('#taxonomies').append("<%= escape_javascript(render(partial: '/stores/taxonomy', locals: {stores: #stores } )) %>");
}
if ($("[class^=store_]").length > 0) {
if ( $('#taxonomies').find('h3').length ) {
// do nothing - leave the h3 where it is
} else {
$('#taxonomies').prepend("<h3>Store Taxonomies</h3>");
}
} else {
$('#taxonomies').find("h3").remove();
}
Now while you could write all your html inline in the js file, it's kind of ugly and easier to edit it later if you put it in a partial - since the js.erb file is calling taxonomy, you'll need a partial with the same name
_taxonomy.html.erb
<div class="store_<%=#store.id%>">
<h4><%= #store.name %></h4>
<ul class="multi-column-checkbox">
<%- #store.taxonomies.each do |taxonomy| %>
<li>
<%= check_box_tag "[taxonomy_ids][]", taxonomy.id, false %>
<%= taxonomy.name %>
<% end %>
</li>
</ul>
</div>
In my Users index action I am iterating through all the Users who have posted a status update and ordering them by created_at DESC.
In my index.html.view
<% #users.each.do |user| %>
<% user.status = #status %>
<%= #status.content %>
<div id ="like_form">
<% if #status.has_like_already?(#status, current_user)%>
<%= render 'already_liked'%>
<%else%>
<%= render 'like'%>
<%end%>
</div>
_like.html.erb
<%= link_to "Like", likes_path(:like_for => #status.id), remote: true, :method=>:post %>
_already_liked.html.erb
<span>Liked</span>
create.js.erb
$("#like_form").html("<%= escape_javascript(render('users/already_liked')) %>")
The issue is that I am able to like a status update and for the first post the Like button changes to Unlike, but on subsequent clicks the like button doesn't change to Unlike. This is because #like_form for the first post has already been changed to Unlike. Since I am iterating, how do I get the like functionality to work with Ajax for each status posted?
You can add user id to div, so you can unique your div's id.
index.html.erb
<div id ="like_form_<%= user.id %>">
</div>
_like.html.erb
<%= link_to "Like", likes_path(:like_for => #status.id, :user_id=>user.id), remote: true, :method=>:post %>
create.js.erb
$("#like_form_<%= params[:user_id]%>").html("<%= escape_javascript(render('users/unlike')) %>")
Right now I'm using AJAX for creating comments. However when I hit enter the textfield remains populated. I want the field to refresh (and still be able to write in another comment). no errors but it still doesn't refresh the textfield it seems. The create part works fine.
create.js/erb: (need to fix the second line here so that it fully replaces)
$('#<%= dom_id(#micropost) %>').html("<%= escape_javascript(render(:partial => #micropost.comments))%>")
$("#comment_field_<%=#micropost.id%>").replaceWith("<%= escape_javascript(render 'shared/comment_form', micropost: #micropost) %>")
Microposts/_micropost:
<span id="<%= dom_id(micropost) %>"><%= render micropost.comments %></span>
<span id="comment_field_<%=micropost.id%>"><%= render 'shared/comment_form', micropost: micropost if signed_in? %></span>
Shared/Comment_form:
<%= form_for #comment, id:"comment_form", remote: true do |f| %>
<%= hidden_field_tag :micropost_id, micropost.id %>
<div id="comment_field">
<%= link_to gravatar_for((current_user), size: 29) %>
<%= f.text_field :content, placeholder: "Say Something...", id: "comment_text_field", :style => "width: 508px; text-indent: 5px" %>
</div>
<% end %>
Needed to only use jquery to clear the text_field by setting empty value
create.js.erb
$("#comment_text_field_<%=#micropost.id%>").val("")
best practice to use a unique dynamic ID but probably would have worked either way.
Shared/Comment_form:
<%= f.text_field :content, id: "comment_text_field_#{micropost.id}" %>