Rails 5.1.2 Ajax remote: true not working - javascript

I would like to implement ajax to create a post, without recharging the page and not going to the show (I following a tutorial) but is not working.
in the _form.html.haml you can see remote:true in the form helper
= form_for #post,remote: true do |f|
- if #post.errors.any?
#error_explanation
%h2= "#{pluralize(#post.errors.count, "error")} prohibited this post
from being saved:"
%ul
- #post.errors.full_messages.each do |message|
%li= message
.mdl-textfield.mdl-js-textfield.full-width
= f.text_area :body, class:"mdl-textfield__input"
= f.label :body, "Comparte con la Comunidad", class:"mdl-
textfield__label"
.actions.text-right
= f.submit 'Publicar', class:"mdl-button mdl-js-button mdl-button--
raised mdl-button--colored"
however when the post is created, the application redirect to the show of the post created recently in html format, it should be stay in the form.
I don't know if the version of Rails 5.1.2 has a issue, but in Rails 4 with only typing remote: true the application stay in the form after the submit action.
post controller:
class PostsController < ApplicationController
before_action :set_post, only: [:show, :edit, :update, :destroy]
# GET /posts
# GET /posts.json
def index
#posts = Post.all
end
# GET /posts/1
# GET /posts/1.json
def show
end
# GET /posts/new
def new
#post = Post.new
end
# GET /posts/1/edit
def edit
end
# POST /posts
# POST /posts.json
def create
#post = current_user.posts.new(post_params)
respond_to do |format|
if #post.save
format.html { redirect_to #post, notice: 'Post was successfully created.' }
format.json { render :show, status: :created, location: #post }
else
format.html { render :new }
format.json { render json: #post.errors, status: :unprocessable_entity }
end
end
end
# PATCH/PUT /posts/1
# PATCH/PUT /posts/1.json
def update
respond_to do |format|
if #post.update(post_params)
format.html { redirect_to #post, notice: 'Post was successfully updated.' }
format.json { render :show, status: :ok, location: #post }
else
format.html { render :edit }
format.json { render json: #post.errors, status: :unprocessable_entity }
end
end
end
# DELETE /posts/1
# DELETE /posts/1.json
def destroy
#post.destroy
respond_to do |format|
format.html { redirect_to posts_url, notice: 'Post was successfully destroyed.' }
format.json { head :no_content }
end
end
private
# Use callbacks to share common setup or constraints between actions.
def set_post
#post = Post.find(params[:id])
end
# Never trust parameters from the scary internet, only allow the white list through.
def post_params
params.require(:post).permit(:body)
end
end
also I have a show.js.erb file to render a view to see the body of the post after he is created.
show.js.erb
$('#posts').append("<%= render j #post %>")
_post.haml
%article
=post.body

Done! in the post controller is missing to respond a JS format and the show.js.erb the render method has bad syntax
1) post controller: add format.js
def create
#post = current_user.posts.new(post_params)
respond_to do |format|
if #post.save
format.html { redirect_to #post, notice: 'Post was successfully created.' }
format.json { render :show, status: :created, location: #post }
format.js { render :show }
else
format.html { render :new }
format.json { render json: #post.errors, status: :unprocessable_entity }
format.js { }
end
end
end
2) show.js.erb: the J it should be before render
$("posts").append(<%= j render #post %>)

Related

Rails - Render html with an ajax request in controller

I would like render format.html if param[:date] != nil and render .js if it's not nil.
My link_to :
<%= link_to place_path(place, date: params[:date]), id: "#{place.id}", remote: true, authenticity_token: true, data: { title: place.city }, target: "_blank" do %>
My controller :
class PlacesController < ApplicationController
def show
if params[:date] == nil
respond_to do |format|
format.html {
preparation_of_instance_variables_for_show_view
}
format.js { }
end
else
respond_to do |format|
format.html {
preparation_of_instance_variables_for_show_view
}
format.js {
render format: 'html' # <= where I want to render format.html
}
end
go_to_show_view
end
end
private
def preparation_of_instance_variables_for_show_view
#place = Place.find_by_id(params[:id])
if params[:date].present?
#guests = Booking.accepted.where(place: #place, date: Date.parse(params[:date])).map(&:guest)
end
end
How I can to redirect to the format.html just for this case?
You say in your question that you want to render html if its != (not equal) to nil and to render js if it's not equal to nil. You can't render both on the same condition! Either way you should wrap the respond_to around the if condition:
def show
respond_to do |format|
if params[:date] # This means if params[:date] has a value (true)
format.html {
preparation_of_instance_variables_for_show_view
}
else # If params[:date] is equal to nil
format.js {}
end # End of if params[:date]
go_to_show_view
end # End of respond_to

Restriction for post to the map display

i'm currently building a web app, and I encounters some problems.
I want the map display posts that are pushed (so push == true). For that, i'd try a lot of conditions, but it's never working. I feel I am not far from the goal, but for now, the map no reference points.
posts controller :
class PostsController < ApplicationController
before_action :authenticate_user!
before_action :set_post, only: [:show, :edit, :update, :destroy]
before_action :owned_post, only: [:edit, :update, :destroy]
# GET /posts
# GET /posts.json
def index
#posts = Post.all.order("push_updated_at DESC")
if #posts.push == true
#hash = Gmaps4rails.build_markers(#posts) do |post, marker|
marker.lat post.latitude
marker.lng post.longitude
end
end
end
# GET /posts/1
# GET /posts/1.json
def show
end
# GET /posts/new
def new
#post = current_user.posts.build
end
# GET /posts/1/edit
def edit
end
# POST /posts
# POST /posts.json
def create
#post = current_user.posts.build(post_params)
respond_to do |format|
if #post.save
#post.update(push: false)
format.html { redirect_to #post, notice: 'Post was successfully created.' }
format.json { render :show, status: :created, location: #post }
else
format.html { render :new }
format.json { render json: #post.errors, status: :unprocessable_entity }
end
end
end
# PATCH/PUT /posts/1
# PATCH/PUT /posts/1.json
def update
#post = Post.find(params[:id])
respond_to do |format|
if #post.update(post_params)
format.html { redirect_to #post, notice: 'Post was successfully updated.' }
format.json { render :show, status: :ok, location: #post }
else
format.html { render :edit }
format.json { render json: #post.errors, status: :unprocessable_entity }
end
end
end
# DELETE /posts/1
# DELETE /posts/1.json
def destroy
#post.destroy
respond_to do |format|
format.html { redirect_to posts_url, notice: 'Post was successfully destroyed.' }
format.json { head :no_content }
end
end
private
# Use callbacks to share common setup or constraints between actions.
def set_post
#post = Post.find(params[:id])
end
# Never trust parameters from the scary internet, only allow the white list through.
def post_params
params.require(:post).permit(:user_id, :title, :description, :image, :push, :push_updated_at, ingredients_attributes: [:id, :name, :_destroy])
end
def owned_post
unless current_user == #post.user
flash[:alert] = "That post doesn't belong to you!"
redirect_to root_path
end
end
end
views/posts/index :
<div class="title text-center">
<h1>Alors ? On mange quoi ?</h1>
</div>
<br>
<%= render 'map' %>
<%= render 'post' %>
& views/posts/map :
<script src="//maps.google.com/maps/api/js?v=3.18&sensor=false&client=&key=&libraries=geometry&language=&hl=&region="></script>
<script src="//google-maps-utility-library-v3.googlecode.com/svn/tags/markerclustererplus/2.0.14/src/markerclusterer_packed.js"></script>
<script src='//google-maps-utility-library-v3.googlecode.com/svn/tags/infobox/1.1.9/src/infobox_packed.js' type='text/javascript'></script> <!-- only if you need custom infoboxes -->
<div style='width: 800px;'>
<div id="map" style='width: 800px; height: 400px;'></div>
<script type="text/javascript">
handler = Gmaps.build('Google');
handler.buildMap({ provider: {}, internal: {id: 'map'}}, function(){
markers = handler.addMarkers(<%=raw #hash.to_json %>);
handler.bounds.extendWith(markers);
handler.fitMapToBounds();
});
</script>
</div>
</div>
So if you have any suggestions about that, you're welcome !!
For this stage you should create a scope on model Post
class Post < ActiveRecord::Base
scope :push, ->{ where(push: true).order("push_updated_at DESC") }
end
and then in controller
def index
#posts = Post.push #this will fetch the post with push true and sort it
#hash = Gmaps4rails.build_markers(#posts) do |post, marker|
#rest of your code
end

Ajax function implementation in controllers in rails

So I've been searching for an answer to this, but I've been having a lot of trouble. I'm trying to have a form_for in rails that goes to the create action in the User controller, which updates the color of the submit button depending on whether it fails submitting or not. Here is my code, some of which is directly from a tutorial I found online:
class UsersController < ApplicationController
def new
#user = User.new
end
def create
#user = User.new(user_params)
respond_to do |format|
if #user.save
format.html { redirect_to #user, notice: 'User was successfully created.' }
format.js {}
format.json { render json: #user, status: :created, location: #user }
else
format.html { render action: "new" }
format.json { render json: #user.errors, status: :unprocessable_entity }
end
end
private
def user_params
params.require(:user).permit(:email)
end
And here is my create.js.coffee.erb file.
if(!isValidEmailAddress($('#e_submit').val())){
$('.button').text("Invalid Email");
$('.button').animate({"background-color":"#FFBF00"},300);
$('.button').hover(function(){
$(this).css("background-color","#FFBF00");
}, function(){
$(this).css("background-color","#FFBF00");
});
$('#e_submit').css("box-shadow","0 0 0px rgba(0,0,0,0)");
$('#e_submit').val("");
}
Basically, I want different js events to happen depending on the submitted information, and I don't know how to do this in rails.
You could check if there are any errors on #user in your js template to know if save is success or not, create.js.coffee.erb:
<% if #user.errors.empty? %>
# successfully saved
<% else %>
# failed to save
<% end %>

Agile Web Development with Rails: Two (2) items added to depot cart instead of one (1)

So I worked through the Agile Web Development with Rails book, and had a nice functional web application running on Heroku based on the "Depot" app in the book. I was editing CSS/SASS primarily, and I did something that messed up my line_item quantity in my cart.
For the life of me I can't figure out what I've done. Now when I click "Add to cart" button on my main page, 2 items are added to my cart. Does this have something to do with my database? I'm totally flummoxed after losing a bit of my flow in photoshop/CSS-land.
So in a nutshell:
I hit the "Add to cart" button, and I get two of each item I click on.
Here is my carts controller:
class CartsController < ApplicationController
skip_before_filter :authorize, only: [:create, :update, :destroy]
# GET /carts
# GET /carts.json
def index
#carts = Cart.all
respond_to do |format|
format.html # index.html.erb
format.json { render json: #carts }
end
end
# GET /carts/1
# GET /carts/1.json
def show
begin
#cart = Cart.find(params[:id])
rescue ActiveRecord::RecordNotFound
logger.error "Attempt to access invalid cart #{params[:id]}"
redirect_to store_url, notice: 'Invalid cart'
else
respond_to do |format|
format.html #show.html.erb
format.json { render json: #cart }
end
end
end
# GET /carts/new
# GET /carts/new.json
def new
#cart = Cart.new
respond_to do |format|
format.html # new.html.erb
format.json { render json: #cart }
end
end
# GET /carts/1/edit
def edit
#cart = Cart.find(params[:id])
end
# POST /carts
# POST /carts.json
def create
#cart = Cart.new(params[:cart])
respond_to do |format|
if #cart.save
format.html { redirect_to #cart, notice: 'Cart was successfully created.' }
format.json { render json: #cart, status: :created, location: #cart }
else
format.html { render action: "new" }
format.json { render json: #cart.errors, status: :unprocessable_entity }
end
end
end
# PUT /carts/1
# PUT /carts/1.json
def update
#cart = Cart.find(params[:id])
respond_to do |format|
if #cart.update_attributes(params[:cart])
format.html { redirect_to #cart, notice: 'Cart was successfully updated.' }
format.json { head :no_content }
else
format.html { render action: "edit" }
format.json { render json: #cart.errors, status: :unprocessable_entity }
end
end
end
# DELETE /carts/1
# DELETE /carts/1.json
def destroy
#cart = current_cart
#cart.destroy
session[:cart_id] = nil
respond_to do |format|
format.html { redirect_to store_url }
format.json { head :no_content }
end
end
end
Here is my models/cart.rb file:
class Cart < ActiveRecord::Base
attr_accessible :title, :body, :name, :quantities_attributes, :quantities, :quantity, :product_id, :line_items
#the addition of everything in attr_accessible after :body may be unnecessary if bugs show up later on...
has_many :line_items, dependent: :destroy
def add_product(product_id)
current_item = line_items.find_by_product_id(product_id)
if current_item
current_item.quantity += 1
else
current_item = line_items.build(product_id: product_id)
end
current_item
end
def total_price
line_items.to_a.sum { |item| item.total_price }
end
end
Here is my create.js.erb file
$("#notice").hide();
if ($('#cart tr').length == 1) { $('#cart').show('blind', 1000); }
$('#cart').html("<%=j render #cart %>");
$('#current_item').css({'background-color':'#fb0f19'}).
animate({'background-color':'#08BBD1'}, 1000);
Here is my application_controller.rb:
class ApplicationController < ActionController::Base
before_filter :authorize
protect_from_forgery
private
def current_cart
Cart.find(session[:cart_id])
rescue ActiveRecord::RecordNotFound
cart = Cart.create
session[:cart_id] = cart.id
cart
end
protected
def authorize
unless User.find_by_id(session[:user_id])
redirect_to login_url, notice: "Please log in"
end
end
end
Here is my views/carts/_cart.html.erb
<% unless cart.line_items.empty? %>
<div class="cart_title">Your Comic Cart</div>
<table>
<%= render(cart.line_items) %>
<tr class="total_line">
<td colspan="2">Total</td>
<td class="total_cell"><%= cart.total_price %> BTC</td>
</tr>
</table>
<%= button_to "Checkout", new_order_path, method: :get %>
<%= button_to 'Empty cart', cart, method: :delete,
confirm: 'Are you sure?' %>
<% end %>
line_items_controller.rb:
class LineItemsController < ApplicationController
skip_before_filter :authorize, only: :create
# GET /line_items
# GET /line_items.json
def index
#line_items = LineItem.all
respond_to do |format|
format.html # index.html.erb
format.json { render json: #line_items }
end
end
# GET /line_items/1
# GET /line_items/1.json
def show
#line_item = LineItem.find(params[:id])
respond_to do |format|
format.html # show.html.erb
format.json { render json: #line_item }
end
end
# GET /line_items/new
# GET /line_items/new.json
def new
#line_item = LineItem.new
respond_to do |format|
format.html # new.html.erb
format.json { render json: #line_item }
end
end
# GET /line_items/1/edit
def edit
#line_item = LineItem.find(params[:id])
end
# POST /line_items
# POST /line_items.json
def create
#cart = current_cart
product = Product.find(params[:product_id])
#line_item = #cart.add_product(product.id)
respond_to do |format|
if #line_item.save
format.html { redirect_to store_url }
format.js { #current_item = #line_item }
format.json { render json: #line_item,
status: :created, location: #line_item }
else
format.html { render action: "new" }
format.json { render json: #line_item.errors, status: :unprocessable_entity }
end
end
end
# PUT /line_items/1
# PUT /line_items/1.json
def update
#line_item = LineItem.find(params[:id])
respond_to do |format|
if #line_item.update_attributes(params[:line_item])
format.html { redirect_to #line_item, notice: 'Line item was successfully updated.' }
format.json { head :no_content }
else
format.html { render action: "edit" }
format.json { render json: #line_item.errors, status: :unprocessable_entity }
end
end
end
# DELETE /line_items/1
# DELETE /line_items/1.json
def destroy
#line_item = LineItem.find(params[:id])
#line_item.destroy
respond_to do |format|
format.html { redirect_to line_items_url }
format.json { head :no_content }
end
end
end
I'm not sure if there are more files worth showing, it is late and I'm super lost, so I probably should have waited until morning to post this. Let me know if anyone else has run into this. I still have a hard time with databases, so I could be completely missing the right place to be looking. Thanks for any help, I know this misstep lacks focus in my explination.
I think the problem is in your store.js.coffee. Check and modify the code as per errata 153 from below link:
http://pragprog.com/titles/rails4/errata
i.e change $(document).on "ready page:change" to $(document).on "ready, page:change"

Rails 3: odd Actionview template error when using if elsif statement

I'm using an if elsif elsif elsif end statement and I"m getting the following error as ActionView is looking for a create.js.erb file because its the name of the method. I tried to specify the :action specifically but it isn't working. If I remove the elsifs and use just a single if end statement it renders the :action 'create_like'.. shown below:
def create
if params[:liked_id]
#post = Post.find(params[:appreciation][:liked_id])
current_user.like!(#post)
respond_to do |format|
format.html { redirect_to #post }
format.js { render :action => "create_like" }
end
end
end
## ERROR
ActionView::MissingTemplate (Missing template appreciations/create with {:handlers=>[:erb, :rjs, :builder, :rhtml, :rxml, :haml], :formats=>[:js, "application/ecmascript", "application/x-ecmascript", "*/*"], :locale=>[:en, :en]} in view paths "/Users/iHal/Desktop/WORK/GP/app/views", "/Users/iHal/.rvm/gems/ruby-1.9.2-p290#rails3/bundler/gems/rails_admin-0060ad2d78ed/app/views", "/Users/iHal/.rvm/gems/ruby-1.9.2-p290#rails3/gems/client_side_validations-3.1.0/app/views", "/Users/iHal/.rvm/gems/ruby-1.9.2-p290#rails3/gems/devise-1.3.4/app/views"):
UsersController
class AppreciationsController < ApplicationController
before_filter :authenticate_user!
def create
if params[:liked_id]
#post = Post.find(params[:appreciation][:liked_id])
current_user.like!(#post)
respond_to do |format|
format.html { redirect_to #post }
format.js { render :action => "create_like" }
end
elsif params[:voted_id]
#post = Post.find(params[:appreciation][:voted_id])
current_user.vote!(#post)
respond_to do |format|
format.html { redirect_to #post }
format.js { render :action => "create_vote" }
end
elsif params[:thanked_id]
#post = Post.find(params[:appreciation][:thanked_id])
current_user.thank!(#post)
respond_to do |format|
format.html { redirect_to #post }
format.js {render :action => 'create_thank'}
end
end
end
def destroy
if params[:liked_id]
#post = Appreciation.find(params[:id]).liked
current_user.unlike!(#post)
respond_to do |format|
format.html { redirect_to #post }
format.js { render :action => "destroy_like" }
end
elsif params[:vote_id]
#post = Appreciation.find(params[:id]).voted
current_user.unvote!(#post)
respond_to do |format|
format.html { redirect_to #post }
format.js { render :action => "destroy_vote" }
end
elsif params[:thanked_id]
#post = Appreciation.find(params[:id]).thanked
current_user.unthank!(#post)
respond_to do |format|
format.html { redirect_to #post }
format.js { render :action => "destroy_thank" }
end
end
end
end
edit
Started POST "/appreciations" for 127.0.0.1 at 2011-11-24 23:57:18 -0700
Processing by AppreciationsController#create as JS
Parameters: {"utf8"=>"✓", "authenticity_token"=>"T3PeKRaSJSrESFTOCQ7+4LiM4BKaWkcaQ6cXpSqK38k=", "appreciation"=>{"liked_id"=>"75"}, "commit"=>"Like"}
User Load (1.1ms) SELECT "users".* FROM "users" WHERE "users"."id" = 3 LIMIT 1
Completed in 309ms
ActionView::MissingTemplate (Missing template appreciations/create with {:handlers=>[:erb, :rjs, :builder, :rhtml, :rxml, :haml], :formats=>[:js, "application/ecmascript", "application/x-ecmascript",...
Sorry, you should call return after each respond_to. Because after called if, the method process continued to the end and trying to call render default. For example:
render 'your_template' and return
Or in your case
respond_to do |format|
format.html { redirect_to #post }
format.js { render :action => "create_like" }
end and return
If you examine the parameters from your request carefully, notice that you're not passing any of params[:liked_id], params[:voted_id] or params[:thanked_id]:
Parameters: {"utf8"=>"✓", "authenticity_token"=>"T3PeKRaSJSrESFTOCQ7+4LiM4BKaWkcaQ6cXpSqK38k=", "appreciation"=>{"liked_id"=>"75"}, "commit"=>"Like"}
You are rather passing params[:appreciation][:liked_id]. It seems you should change your conditions to:
def create
if params[:appreciation][:liked_id]
# ...
elsif params[:appreciation][:voted_id]
# ...
elsif params[:appreciation][:thanked_id]
# ...
end
end

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