I have issue with multiple delete using checkboxes. when i m deleting multiple records it get s ids for checkboxes but it is passing a method name as parameter and shows me error.
here is my code,
**In my Controller method :**
def destroy
#ticket = current_user.tickets.find(params[:ticket_ids])
#ticket.destroy
respond_to do |format|
format.html { redirect_to tickets_url }
format.json { head :no_content }
end
end
def destroy_multiple
Ticket.destroy(params[:tickets])
respond_to do |format|
format.html { redirect_to tickets_path }
format.json { head :no_content }
end
end
**In my index.html.erb**
<%= form_tag destroy_multiple_tickets_path, method: :delete do %>
.
.
<td class="table-icon">
<%= check_box_tag "ticket_ids[]", ticket.id %>
</td>
.
.
<%= submit_tag "Delete selected" %>
**In routes.rb**
resources :tickets do
collection do
delete 'destroy_multiple'
end
end
it shows me this error ::::
Couldn't find Ticket with id=destroy_multiple [WHERE "tickets"."user_id" = 1]
passes arguement ::::
{"utf8"=>"✓",
"_method"=>"delete",
"authenticity_token"=>"yHeRR49ApB/xGq1jzMTdzvix/TJt6Ysz88nuBEotHec=",
"ticket_ids"=>["11",
"12"],
"commit"=>"Delete selected",
"id"=>"destroy_multiple"}
Step:1 In routes.rb
resources :tickets do
collection do
delete 'destroy_multiple'
end
end
Step:2 In _form.html.erb
<%= form_tag destroy_multiple_tickets_path, method: :delete do %>
<td class="table-icon">
<%= check_box_tag "ticket_ids[]", ticket.id %>
</td>
<%= submit_tag "Delete selected" %>
<%end%>
Stpe:3 In Controller
def destroy_multiple
Ticket.destroy(params[:tickets])
respond_to do |format|
format.html { redirect_to tickets_path }
format.json { head :no_content }
end
end
do
Ticket.destroy(array_of_ids)
Try this
Ticket.where(:id => params[:ticket_ids]).destroy_all
Hi, Update your Controller code likewise..
def destroy_multiple
#tickets = Ticket.find(params[:ticket_ids])
#tickets.each do |ticket|
ticket.destroy
end
end
Related
i have a method which i wan to call from my controller. What i've read in stacks are most of them said to include the method in applicationController.Therefore i did. But still i got the following error. Can some1 help me ? New to rails
APPLICATION CONTROLLER :
helper_method :random_generate
def random_generate
length = #generator.primer_length
chars = 'ATGC'
seq = ''
length.times { seq << chars[rand(chars.size)] }
#generator.random_primer_generated= seq
end
CONTROLLER :
class GeneratorsController < ApplicationController
before_action :set_generator, only: [:show, :edit, :update, :destroy]
after_action :generate_option, only: [:create,:edit]
helper_method :random_primer_generated
# GET /generators
# GET /generators.json
def index
#generators = Generator.all
end
# GET /generators/1
# GET /generators/1.json
def show
end
# GET /generators/new
def new
#generator = Generator.new
end
# GET /generators/1/edit
def edit
end
# POST /generators
# POST /generators.json
def create
#generator = Generator.new(generator_params)
respond_to do |format|
if #generator.save
format.html { redirect_to #generator, notice: 'Generator was successfully created.' }
format.json { render action: 'show', status: :created, location: #generator }
else
format.html { render action: 'new' }
format.json { render json: #generator.errors, status: :unprocessable_entity }
end
end
end
# PATCH/PUT /generators/1
# PATCH/PUT /generators/1.json
def update
respond_to do |format|
if #generator.update(generator_params)
format.html { redirect_to #generator, notice: 'Generator was successfully updated.' }
format.json { head :no_content }
else
format.html { render action: 'edit' }
format.json { render json: #generator.errors, status: :unprocessable_entity }
end
end
end
# DELETE /generators/1
# DELETE /generators/1.json
def destroy
#generator.destroy
respond_to do |format|
format.html { redirect_to generators_url }
format.json { head :no_content }
end
end
def generate_option
if params[:choice] == 'Randomly'
#generator.random_generate
end
#generator.save!
end
private
# Use callbacks to share common setup or constraints between actions.
def set_generator
#generator = Generator.find(params[:id])
end
# Never trust parameters from the scary internet, only allow the white list through.
def generator_params
params.require(:generator).permit(:primer_length, :choice, :random_primer_generated)
end
end
VIEW:
<%= form_for (#generator ) do |f| %>
<% if #generator.errors.any? %>
<div id="error_explanation">
<h2><%= pluralize(#generator.errors.count, "error") %> prohibited this generator from being saved:</h2>
<ul>
<% #generator.errors.full_messages.each do |msg| %>
<li><%= msg %></li>
<% end %>
</ul>
</div>
<% end %>
<div class="field">
<label>Primer Length</label><br>
<%= f.number_field :primer_length %>
</div>
<label>Selection :</label><br>
<label>Randomly</label>
<%= radio_button_tag(:choice, 'Randomly')%>
<%= button_to('Generate',generate_option_generator_path(#generator))%>
<% end %>
If you want to call random_generate on the #generator, you have to implement that method in the Generator class. What you have done is implemented it in the ApplicationController, so you would have to call it without referencing to #generator.
Also, I think calling helper_method :random_generate is only required if you want to call random_generate as a controller method inside of a view.
I have a nested form (see below)
Model Artist (artist is a user)
has_many :art_works
has_many :canvases
accepts_nested_attributes_for :art_works //artworks is what im currently working on
accepts_nested_attributes_for :canvases
Controller art_works
def new
#artist = Artist.find(params[:artist_id])
#artwork = #artist.art_works.build
respond_to do |format|
format.html # new.html.erb
format.json { render json: #artwork }
end
end
def create
#artwork = ArtWork.new(params[:artwork])
respond_to do |format|
if #artwork.save
format.html { redirect_to #artwork, notice: 'artwork was successfully created.' }
format.json { render json: #artwork, status: :created, location: #artwork }
else
format.html { render action: "new" }
format.json { render json: #artwork.errors, status: :unprocessable_entity }
end
end
end
artworks views _form
<%= form_for(#artwork, :url => artist_art_works_path(current_artist) :multipart => true) do |f| %>
<p>
<%= f.file_field :art %>
</p>
<p>
<%= f.submit %>
</p>
<% end %>
I was pretty positive that this would work, but i'm assuming my :url is incorrect? I'm not really sure what else it would be though. below are my routes for artworks the reason why I am nesting these things is because an artist can upload art into an artwork model the idea is to have several pieces of art in one artwork (like an album has many images inside of it)
artist_art_works GET /artists/:artist_id/art_works(.:format) art_works#index
POST /artists/:artist_id/art_works(.:format) art_works#create
new_artist_art_work GET /artists/:artist_id/art_works/new(.:format) art_works#new
edit_artist_art_work GET /artists/:artist_id/art_works/:id/edit(.:format) art_works#edit
artist_art_work GET /artists/:artist_id/art_works/:id(.:format) art_works#show
PUT /artists/:artist_id/art_works/:id(.:format) art_works#update
DELETE /artists/:artist_id/art_works/:id(.:format) art_works#destroy
Thank you very much in advance for your help. (sorry for the noobness)
You're missing a comma. Yeah the error message isn't that helpful.
#artwork, :url => artist_art_works_path(current_artist) :multipart => true
vs
#artwork, :url => artist_art_works_path(current_artist), :multipart => true
Here is the code that works for me in views/posts/show.html.erb file:
<% require 'rmmseg' %>
<% RMMSeg::Dictionary.load_dictionaries %>
<% text = "你好" %>
<% algor = RMMSeg::Algorithm.new(#post.content) %>
<% loop do %>
<% tok = algor.next_token %>
<% break if tok.nil? %>
<% text2 = tok.text.force_encoding('UTF-8') %>
<%= "#{text2}" %>
<% end %>
I am new to rails so I need help knowing where to put this code, or similar, in the framework so that it saves the post with the spaces in the database. Should it be in the controller? If so, how would I do it?
I was trying and failing with this:
def create
#post = Post.new(params[:post])
require 'rmmseg'
RMMSeg::Dictionary.load_dictionaries
algor = RMMSeg::Algorithm.new(#post.content)
loop do
tok = algor.next_token
break if tok.nil?
text2 = tok.text.force_encoding('UTF-8')
#post.content = "#{text2}"
end
respond_to do |format|
if #post.save
format.html { redirect_to #post, notice: 'Post was successfully created.' }
format.json { render json: #post, status: :created, location: #post }
else
format.html { render action: "new" }
format.json { render json: #post.errors, status: :unprocessable_entity }
end
end
end
I obviously have know idea what I am doing yet.
I called the Rails Hotline and they gave me the hint to put it in the model using a callback (before_save, after_save, etc.)
That worked for me.
I'm creating a basic loyalty card application, with model Merchant and Loyaltycard. In the merchant#show view I have this line
<%=link_to 'New Loyalty card', new_loyaltycard_path(:merchant_id=>1) %>
I'm trying to pass the merchant ID to the loyaltycard#new view so it will be automatically selected as the merchant for that card. In loyaltycard#_form (which gets called by loyaltycard#new) I have the lines
<%if #merchant%>
<%= f.hidden_field :merchant_id, :value => #merchant.id %>
<%else%>
<div class="field">
<%= f.label :merchant_id %><br />
<%= f.text_field :merchant_id %>
</div>
<%end%>
But I keep getting and error that says can't call id for class Nil. Is there a better way of doing this?
Here is the controller code for loyaltycard
def new
#loyaltycard = Loyaltycard.new
respond_to do |format|
format.html # new.html.erb
format.json { render json: #loyaltycard }
end
end
# GET /loyaltycards/1/edit
def edit
#loyaltycard = Loyaltycard.find(params[:id])
end
# POST /loyaltycards
# POST /loyaltycards.json
def create
#loyaltycard = Loyaltycard.new(params[:loyaltycard])
respond_to do |format|
if #loyaltycard.save
format.html { redirect_to #loyaltycard, notice: 'Loyaltycard was successfully created.' }
format.json { render json: #loyaltycard, status: :created, location: #loyaltycard }
else
format.html { render action: "new" }
format.json { render json: #loyaltycard.errors, status: :unprocessable_entity }
end
end
end
The error is
Called id for nil, which would mistakenly be 4 -- if you really wanted the id of nil, use object_id
What you need to do in your new action is using the params[:merchant_id] to look up and set #merchant
#merchant = Merchant.find(params[:merchant_id])
Then your code should work, without that, #merchant is nil, and you can't call the method :id on nil
You're not setting variable #merchant anywhere in your controller, but you use it the view.
I'm quite new to Rails and to this Q&A website! So hello everyone, I'm a French Rails tester. I have cross posted this question to Railsforum too, to have a better chance on getting an answer :) (http://railsforum.com/viewtopic.php?id=44238)
I need help on something. It seems simple, but in my opinion, not well documented (I browsed the web for 3 days without finding a clean answer. Some partial solutions here, but not a complete and clean one for a newbie!)
I want to add some actions to a default scaffolded controller to handle creation and modification of multiple records in the same form.
rails generate scaffold Item title:string
This is the sample scaffolded code:
app/controllers/items_controller.rb
class ItemsController < ApplicationController
# GET /items
# GET /items.xml
def index
#items = Item.all
respond_to do |format|
format.html # index.html.erb
format.xml { render :xml => #items }
end
end
# GET /items/1
# GET /items/1.xml
def show
#item = Item.find(params[:id])
respond_to do |format|
format.html # show.html.erb
format.xml { render :xml => #item }
end
end
# GET /items/new
# GET /items/new.xml
def new
#item = Item.new
respond_to do |format|
format.html # new.html.erb
format.xml { render :xml => #item }
end
end
# GET /items/1/edit
def edit
#item = Item.find(params[:id])
end
# POST /items
# POST /items.xml
def create
#item = Item.new(params[:item])
respond_to do |format|
if #item.save
format.html { redirect_to(#item, :notice => 'Item was successfully created.') }
format.xml { render :xml => #item, :status => :created, :location => #item }
else
format.html { render :action => "new" }
format.xml { render :xml => #item.errors, :status => :unprocessable_entity }
end
end
end
# PUT /items/1
# PUT /items/1.xml
def update
#item = Item.find(params[:id])
respond_to do |format|
if #item.update_attributes(params[:item])
format.html { redirect_to(#item, :notice => 'Item was successfully updated.') }
format.xml { head :ok }
else
format.html { render :action => "edit" }
format.xml { render :xml => #item.errors, :status => :unprocessable_entity }
end
end
end
# DELETE /items/1
# DELETE /items/1.xml
def destroy
#item = Item.find(params[:id])
#item.destroy
respond_to do |format|
format.html { redirect_to(items_url) }
format.xml { head :ok }
end
end
end
app/views/items/new.html.erb
<h1>New item</h1>
<%= render 'form' %>
<%= link_to 'Back', items_path %>
app/views/items/edit.html.erb
<h1>Editing item</h1>
<%= render 'form' %>
<%= link_to 'Show', #item %> |
<%= link_to 'Back', items_path %>
app/views/items/_form.html.erb
<%= form_for(#item) do |f| %>
<% if #item.errors.any? %>
<div id="error_explanation">
<h2><%= pluralize(#item.errors.count, "error") %> prohibited this item from being saved:</h2>
<ul>
<% #item.errors.full_messages.each do |msg| %>
<li><%= msg %></li>
<% end %>
</ul>
</div>
<% end %>
<div class="field">
<%= f.label :title %><br />
<%= f.text_field :title %>
</div>
<div class="actions">
<%= f.submit %>
</div>
<% end %>
In my opinion, I need to add 4 methods to my Item controller:
new_multiple : to initialize the new
multiple form view
create_multiple :
to handle results from the new
multiple form view
edit_mulitple : to
initialize the edit multiple form
view
update_mulitple : to handle
results from the edit multiple form
view
Then, I need to create 2 new views:
new_multiple.html.erb with code for a multiple record (5 in the same time) creation form
edit_mulitple.html.erb with code for a multiple record (5 in the same time) edition form
and maybe _partials to avoid DRY stuff...
Anyone want to help me write these 4 actions and 2 views? I would really appreciate that.
Thanks! :)
Note : In my application items are children of parentItems but I DON'T WANT to use nested_form to create items in parentItems forms like in railscast 196 and 197.