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 } %>")
UPDATE
Thank you for your answer.
But If I remove
for requested_role in #project.requested_roles
from the partial, then I can't access to the requested_role.role value, because I don't have the parameter X obtained from the code
for X in #projects.requested_roles
and I can't write X.role
How can I access this value without using for or .each to scroll the requested_roles of the project?
END UPDATE
I've a problem with a social network I'm developing with Ruby on Rails. I followed the railscasts 196 and 197 to create a form with fields_for and to add fields dinamically with javascript, but I have 2 major problems.
A User can create a Project and this Project must have 1+ Requested_roles.
When I open the project edit page to change the roles, if there are N requested_roles for the project, I see N*N forms to change the requested_roles. So if I have 2 requested_roles (for example Director and Producer) I see 4 select fields, Director - Producer - Director -Producer. They are repeated N times. And I can't modify them because I can have max 1 requested_role of each type. It's fine if I have only 1 requested_role (because 1x1=1)
Project.rb
class Project < ActiveRecord::Base
attr_accessible :title, :requested_roles_attributes, :video, :num_followers, :num_likes
belongs_to :user
has_many :requested_roles, dependent: :destroy
accepts_nested_attributes_for :requested_roles, :reject_if => lambda { |a| a[:ruolo].blank? }, :allow_destroy => true
Requested_role.rb
class RequestedRole < ActiveRecord::Base
attr_accessible :role, :project_id
belongs_to :project
Projects_controller.rb
class ProjectsController < ApplicationController
def new
#project= Project.new
#requested_role= #project.requested_roles.build
end
Projects/edit.html.erb
<div class="row">
<div class="span6 offset3">
<%= form_for(#project) do |f| %>
<%= render 'shared/error_messages', object: f.object%>
<%= f.label :title, "Project title" %>
<%= f.text_field :title %>
<%= f.fields_for :requested_roles do |builder| %>
ciao
<%= render 'requested_role', :f => builder %>
<% end %>
<div class="fields">
<p><%= link_to_add_fields "Add requested role", f, :requested_roles %></p>
</div>
</br>
<%= f.submit 'Apply changes', class: 'btn btn-large btn-primary' %>
<% end %>
</div>
</div>
I think that the error is in this view (Projects/edit):
<%= f.fields_for :requested_roles do |builder| %>
ciao
<%= render 'requested_role', :f => builder %>
<% end %>
this code, even without the partial, lead to a N-times repeated requested_roles. In fact, without the partial _requested_role, we have N "ciao", but we should have only one.
projects/_requested_role.html.erb
<% if #project.requested_roles.any? %>
<p>Modifica ruoli richiesti </p>
<%end%>
<%= #project.requested_roles.count %>
<% for requested_role in #project.requested_roles %>
<div class="fields">
<p>
<p>Requested role: <%= role_to_string(requested_role.role) %></p>
<%= f.label :role, "Modify role" %>
<%= f.select :role, options_for_select([["Regista",1],["Sceneggiatore", 2],["Direttore della fotografia", 3], ["Operatore",4],
["Fonico", 5], ["Montatore", 6], ["Truccatrice",7], ["Costumista",8], ["VFX Artist",9],
["Produttore", 10], ["Attore",11], ["Attrice",12], ["Grip/Runner",13]], :selected => requested_role.role) %>
<%= link_to_remove_fields "remove", f %> #dinamically remove a field
</p>
<% end %>
</div>
Can you help me please? I can't figure out where the error is. Thank you in advance.
The other problem is related to the links to dinamically delete and add requested_roles (javascript-jquery).
If I have 3 requested_roles (9 select fields instead of 3 because of the error that I mentioned before) and I delete (through link_to_remove_fields) the last one there's no problem. But if I delete the first one, the fields and even the submit button below it disappear and I can't modify the roles or submit the changes.
When I add (through link_to_add_fields) a new role and I already have, for example, 2 requested_roles (Director, Producer), when I click on the link to add the new requested_role another bug occurres. Instead of a select field to choose the role, a copy of the 2 existing select fields (Director, Producer) appears.
application_helper.rb
def link_to_remove_fields(name, f)
f.hidden_field(:_destroy) + link_to_function(name, "remove_fields(this)")
end
def link_to_add_fields(name, f, association)
new_object = f.object.class.reflect_on_association(association).klass.new
fields = f.fields_for(association, new_object, :child_index => "new_#{association}") do |builder|
render(association.to_s.singularize, :f => builder)
end
link_to_function(name, "add_fields(this, \"#{association}\", \"#{escape_javascript(fields)}\")")
end
Application.js
function remove_fields(link) {
$(link).prev("input[type=hidden]").val("1");
$(link).closest(".fields").hide();
}
function add_fields(link, association, content) {
var new_id = new Date().getTime();
var regexp = new RegExp("new_" + association, "g")
$(link).parent().before(content.replace(regexp, new_id));
}
I can't understand what goes wrong. If you have some idea can you give me some advice? Thank you very much.
Dario
The problem is that you're iterating twice.
<%= f.fields_for :requested_roles do |builder| %>
ciao
<%= render 'requested_role', :f => builder %>
<% end %>
Will automatically repeat the requested_role partial for each requested role. That's why it shows "ciao" N times, because that's what fields_for does at render. You probably need to read the doc to understand how it works: http://api.rubyonrails.org/classes/ActionView/Helpers/FormHelper.html#method-i-fields_for
So there is no need to have
for requested_role in #project.requested_roles
in your partial. It will only repeat all requested roles each time fields_for renders it. Here's what your code should look like in your edit.html.erb :
<% if #project.requested_roles.any? %>
<p>Modifica ruoli richiesti </p>
<%end%>
<%= #project.requested_roles.count %>
<%= f.fields_for :requested_roles do |builder| %>
<%= render 'requested_role', :f => builder %>
<% end %>
<p><%= link_to_add_fields "Add requested role", f, :requested_roles %></p>
And the requested_role partial should simply be:
<div class="fields">
<div>
<p>Requested role: <%= role_to_string(f.object.role) %></p>
<%= f.label :role, "Modify role" %>
<%= f.select :role, options_for_select([["Regista",1],["Sceneggiatore", 2],["Direttore della fotografia", 3], ["Operatore",4],
["Fonico", 5], ["Montatore", 6], ["Truccatrice",7], ["Costumista",8], ["VFX Artist",9],
["Produttore", 10], ["Attore",11], ["Attrice",12], ["Grip/Runner",13]], :selected => f.object.role) %>
<%= link_to_remove_fields "remove", f %>
</div>
</div>
Fixing your partial should fix your second problem with the links.
You might want to consider using Ryan's gem for nested_forms
https://github.com/ryanb/nested_form
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}" %>
I'm using an inline form for users to submit data to a table (note that I'm using CSS rather than html tables to achieve this). When an error is returned by the verification in the model, I want to highlight the input field using the Bootstrap error class and put the error message below the appropriate form field. I'm using AJAX to submit the form.
I'm having problems, this is what I have so far:
Controller:
def create
#travel = Travel.new(params[:travel])
#travel[:user_id] = current_user.id
convert_date # and return
if #travel.save
flash[:notice] = "Successfully saved trip"
#travels = Travel.where("user_id = ?",current_user)
respond_to { |format| format.js }
end
end
JS view:
<% if #travel.errors.any? %>
<% #travel.errors.full_messages.each { |msg| logger.debug(msg) } %>
<% #travel.errors.messages.each do |k,v| %>
<% logger.debug("#tf_#{k}") %>
$(<%= "#tf_#{k}" %>).insertAdjacentHTML("afterbegin","<span class="control-group error"><span class="controls">");
$(<%= "#tf_#{k}" %>).insertAdjacentHTML("beforeend","</span></span>");
$(<%= "#error_#{k}" %>).val("<%= "#{k} #{v}" %>");
<% end %>
<% else %>
$(":input:not(input[type=submit])").val("");
$("#travels_list").html("<%= escape_javascript( render(:partial => "travels") ) %>");
<% end %>
form partial:
<%= form_for #travel, :remote => true, :html => {:class => "form-inline", :id => "new-travel-form"} do |f| %>
<div class="row-fluid">
<span id="tf_city"><%= f.text_field :city, :placeholder => "London, UK", :class => "span3" %></span>
<span id="tf_arrive_date"><%= f.text_field :arrive_date, :class => "span2" %> </span>
<span id="tf_leave_date"><%= f.text_field :leave_date, :class => "span2" %> </span>
<span id="tf_notes"><%= f.text_field :notes, :placeholder => "e.g. staying at the Hilton", :class => "span3" %></span>
<%= f.submit "save", :class => "btn btn-primary span1" %>
</div>
<% end %>
<div class="row-fluid error" id="error_expl">
<span id="error_city" class="help-inline span3"></span>
<span id="error_arrive_date" class="help-inline span2"></span>
<span id="error_leave_date" class="help-inline span2"></span>
<span id="error_notes" class="help-inline span3">test</span>
</div>
The logger.debug in the JS is firing, so I know that the error is getting passed to the JS, but the insertAdjacentHMTL() doesn't seem to be working.
maybe this is not going to answer your question but i hope it could help to improve your code.
First, according to your code i guess you should have some associations like this in the model User:
has_many :travels
And in your model Travel:
belongs_to :user
So, in order to improve your code you can have this in your controller:
respond_to :js, only: [:create]
def new
#travel = current_user.travels.new
end
def create
#travel = current_user.travels.new(params[:travel])
if #travel.save
flash[:notice] = "Successfully saved trip"
#travels = current_user.travels
else
# I guess you should have some code here in case any validation fail. If you dont
# have validations for the model Travel, you don't need the if statement here.
end
end
About your problem, can you clarify what is "#tf_#{k}"?
I can't get my form to reset correctly. It submits and it goes to the database but everything remains on the form.
Here is my code:
DogsController
def create
#dog = current_user.dogs.new(params[:dog])
if #dog.save
format.js
else
format.js
end
end
dog/create.js.erb
$('.add-dog-form').html('<%= escape_javascript(render(:partial => 'dogs/form', locals: { dog: #dog })) %>');
$('.add-dog-form > form')[0].reset(); // doesn't work
dog/new.js.erb
$('.add-dog-form').html('<%= escape_javascript(render(:partial => 'dogs/form', locals: { dog: #dog })) %>');
dogs/_form
<%= form_for(#dog, :remote => true) do |f| %>
<%= f.label :name, "Name" %>
<%= f.text_field :name %>
<%= f.submit "Add Dog" %>
<% end %>
I create dogs at the Pets view instead of the dogs.
PetsController
def add
#dog = Dog.new
#cat = Cat.new
#bird = Bird.new
end
pets/add.html.erb
I click on the tab which changes it to the Dog Tab using Twitter Bootstraps Tabbable Nav ability
<div class="tabbable">
<ul class="nav nav-tabs">
<li class="active">
Cat
</li>
<li>
Dog
</li>
<li>
Bird
</li>
</ul>
<div class="tab-content">
<div class="tab-pane active add-cat-form" id="tab1">
<%= render "cats/form" %>
</div>
<div class="tab-pane add-dog-form" id="tab2">
<%= render "dogs/form" %>
</div>
<div class="tab-pane add-bird-form" id="tab3">
<%= render "birds/form" %>
</div>
</div>
</div>
How can I reset the form if it gets created?
Try giving the form an id:
<%= form_for(#dog, :remote => true, :html => { :id => 'dog_form' } ) do |f| %>
and $('#dog_form')[0].reset();.
Alternatively, you can do $(":input:not(input[type=submit])").val("");.
Well it seems my error was in my files themselves. I had created the js files as partials instead of regular pages. i.e. _create.js.erb should be create.js.erb. I also had to add respond_to do |format| in the controller create action. Now I got everything working correctly.