[Rails] respond to js

Ruby on Rails Friday, February 9, 2018

Can someone tell me how this works, I just don't understand what's going on here

_form.html.erb

<%= form_for [post, comment], remote: true,

html: {

class: "new_blog_comment", id: "new_blog_comment" } do |f| -%>

<%= field do %>

<%= f.label :body, t(:your_comment, scope: 'blogit.comments') %><br>

<%= f.text_area :body %><br>

<%= errors_on(comment, :body) %>

<% end %>

<%= actions do %>

<%= f.submit t(:add_comment, scope: 'blogit.comments'), :disable_with => t(:adding_comment, scope: 'blogit.comments') %>

<% end %>

<% end -%>

before_action :find_commentable, only: :create

def create

commentable = commentable_type.constantize.find(commentable_id)

@comment = Comment.build_from(commentable, current_user.id, body)

user_id = commentable.user_id

respond_to do |format|

if @comment.save

make_child_comment

format.html { redirect_to("/page/#{user_id}", :notice => 'Comment was successfully added.') }

else

format.html { render :action => "new" }

end

def find_commentable

@commentable_type = params[:commentable_type].classify

@commentable = @commentable_type.constantize.find(params[:commentable_id])

end

create.js.erb

var $form = $("form#new_blog_comment");

<% if @comment.save %>

$("#comments").append("<%= escape_javascript(render(@comment)) %>");

$form.get(0).reset();

<% else %>

$form.html("<%= escape_javascript(render('form')) %>");

<% end %>

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