I have a _form for new and edit for a #Giveaway object. Within this form I have a field for a random winner.
I want to populate this field by calling the method giveaways#random_winner with <%= button_to "Randomly Pick Winner!", {:action => 'choose_winner'}, :method => :get %>, but I am getting this error No route matches {:action=>"choose_winner", :controller=>"giveaways"} when loading /giveaways/new.
Here is my controller:
def choose_winner
random_winner = SubscriberUser.where(user_id: current_user.id).pluck(:subscriber_id).sample(1)
session[:random_winner] = random_winner
redirect_to :back
end
Here are the routes that I have tried. I'm not very good at non-scaffold routes yet:
resources :giveaways do
member do
get 'choose_winner' => 'giveaways#choose_winner'
#tried get :choose_winner, as: :choose_winner
#tried get 'new/choose_winner'
#tried get 'choose_winner'
#tried get 'choose_winner', to: 'giveaways#choose_winner', as: 'choose_winner'
end
end
Question -- Why is the page not loading when I have defined the controller and action in the route? Will I have to reload the page when I do run that route... is there a better way to get at this data?
Your routes.rb is close
resources :giveaways do
member do
get :choose_winner
end
end
And then I would use a Rails route helper so you don't have to worry about setting the action/controller yourself.
<%= button_to "Randomly Pick Winner", choose_winner_giveaway_path(#giveaway), method: :get %>
Related
I’m using Rails 4.2.3. I want to have a form that will update a group of objects, using checkboxes to mark each of the IDs I want to update. I was tryihn to follow this Railscast — http://railscasts.com/episodes/52-update-through-checkboxes. I have this in my controller serving the page and processing the submissions
def list
#page_id = "list"
#my_objects = MyObject.where(enabled: true)
render :partial => 'list'
end
def enabled
MyObject.update_all(["enabled=?", true], :id => params[:ids])
end
In my view, I have this
<%= form_tag enabled_my_objects_path, :method => :put do %>
But I don’t know what to put in my config/routes.rb file. I tried this
resources :my_objects, :collection => { :enabled => :put }
but I get this error when my page is served
Error (undefined local variable or method `enabled_my_objects_path'
Your syntax is off for declaring a collection route. Add a block to resources and declare your collection there:
resources :my_objects do
put :enabled, on: :collection
end
I have a controller for a resource, BuddiesController. My routes config file up until now has been
resources :buddies
match ':controller(/:action(/:id))', :via => [:get, :post]
I didn't realize what the ' resources :buddies ' line was doing until I read up on routing in Rails just now, because the behavior has been identical with what I expected until now. The problem was that I wanted to add a non-CRUD action to the controller: 'search'. Every time I used link_to(:action => 'search'), I would get an exception saying that action 'show' could not be found despite the url being ' localhost:3000/buddies/search ' as expected. I have several questions arising from this:
Firstly, the form I used in 'new' stopped working:
%= form_for(#buddy, {:action => :create, :method => :post, :html => {:role => "form"}}) do |f| %>
because buddies_path couldn't be found. How could I manually add a buddies_path to my routes?
Secondly, I revised the form to use:
<%= form_for(#buddy, :url => {:action => :create, :id => #buddy.id}, :html => {:role => "form", :id => #buddy.id}) do |f| %>
but this has caused the form to give me password and email confirmation not matching errors even if they match. What's going on here?
Lastly, what is the best way to add a search action to my resource?
#routes.rb
resources :buddies
collection do
get :search
end
end
now when you run rake routes | grep 'buddies' you will get output something like this :
now you need to define this search action in your buddies controller .
#buddies_controller.rb
Class BuddiesController < ApplicationController
def search
end
end
Have your search form in app/views/buddies/search.html.erb
Now in order to open your search form / to hit your search action you need to use
<%= link_to 'Search XYZ', search_buddies_path %>
against buddies#search you can see search_buddies
In routes.rb:
resources :buddies do
collection do
post :search
end
end
This might make your routing works.
My attempt to make a new-action which gives the user a form and a create-action to process it fails with the error message `.
View: app/views/studios/new.html.erb:
<%= form_for #studio, url: {action: 'create'} do |f| %>
<%= f.text_field :name %>
<%= f.submit 'Create' %>
<% end %>
Controller: app/controllers/studio_controller.rb:
def new
#studio = Studio.new
respond_to do |format|
format.html
format.json { render json: #studio }
end
end
def create
# TODO
end
Route: config/routes.rb
get 'studios/new' => 'studios#new', :as => 'new_studio'
On attempting to visit http://localhost:3000/studios/new, I am presented with the error
No route matches {:action=>"create", :controller=>"studios"}
As you can see, the create-action is present in the studios-controller. Why is it failing?
It's failing because you don't have route defined for the create action. You have a get action defined for the new action only.
Update your routes file to add a post route to the create action as:
post 'studios/create' => 'studios#create'
Or, you could choose to use resourceful routing and update your routes file as:
resources :studios, only: [ :new, :create ]
This will define the new and create route for your studio resource. To see the generated routes you can run rake routes.
The rails form helper, given the instance variable #studio, asks for the instance variable via the new action, and, upon clicking save, calls the create action to validate and save this new instance. It's failing because rails cannot find the action to submit the object to.
Try adding resources :studios for RESTful routes in config/routes.rb (index, new, create, show, edit, update, destroy) automagically routing to actions with the same name in the app/controllers/studio_controller.rb
Try visiting the docs for form helpers here: http://guides.rubyonrails.org/form_helpers.html#binding-a-form-to-an-object for a more in depth explaination.
I'm using a custom action to get the id of a project into the session, so that only relevant info for that project is shown in other areas. I've made a custom action in the projects controller, and am having trouble getting a link to work in the view to call that action. I just get an error saying "Couldn't find project without ID". I'm new to rails - I know it's probably an easy question, but help would be much appreciated, thanks!
View Code:
<%= link_to 'Select Project', :action => :select_project %>
Controller Code:
def select_project
#project = Project.find(params[:id])
session[:project_id] = #project.id
end
Routes:
resources :projects do
collection do
get :select_project
end
end
Alternative routes code:
resources :projects do
put 'select_project', on: :member
end
This is untested but I believe it is what you are looking for:
Routes:
resources :projects do
member do
post :set_current
end
end
this should create the following:
Endpoint: /projects/:id/set_current POST
Helper: set_current_project_path
Controller
def set_current
project = Project.find(params[:id])
session[:project_id] = project.id
redirect_to projects_path, :notice => "Current project set to #{project.name}"
end
Views
# index / erb tags excluded for simplicity
#projects.each do |project|
link_to 'Select Project', set_current_project_path(project), :method => :post
end
# show
<%= link_to 'Select Project', set_current_project_path(#project), :method => :post %>
See:
http://guides.rubyonrails.org/routing.html#adding-more-restful-actions
http://guides.rubyonrails.org/routing.html#crud-verbs-and-actions
Note also the use of 'post' instead of 'get', since we are changing the state of an object (session)
it is preferred to use a post not a get, otherwise users might pull up an old get request in the address bar
of their browser and set their session to a project unknowingly.
like varatis said - use rake routes or CONTROLLER=projects rake routes to help with determining what your route/path helpers look like and what http verbs they are expecting
And is there a reason why it's project not #project in the controller
The #project creates an instance variable; in a rails controller instance variables are made available to the views. This set_current action will never render a view, so no reason to make an instance variable out of it.
How come you have to set it to member and not collection in the routes
any action where you want to reference params[:id] should be a member route, an alternative would be to leave it as a collection route and pass params[:project_id] and pass that in all of your link_to calls, but in this case member makes more sense.
I believe resources :projects is a short cut for this break down
member do
get :show
get :edit
put :update
delete :destroy
end
collection do
get :index
get :new
post :create
end
hopefully that clarifies your questions some?
I think the route generated would be select_project_projects_path.
Link:
<%= link_to 'Select Project', select_project_projects_path %>
For future reference, run rake routes to see the automatic route helpers generated by Rails.
So, I have the following link-to:
<%= link_to(outing_add_guests_path, :class => 'modal') do %>
<div id="notImportant"></div>
<% end %>
When I click on it, Rails tells me that
No route matches {:controller=>"outings", :action=>"add_guests"}
However, here's my routes file:
resources :outings do
get "/add_guests" => "outings#add_guests"
post "/add_guests" => "outings#add_guests"
delete "/remove_guests" => "outings#remove_guests"
end
and the corresponding action from my Outings Controller:
def add_guests
#outing_guest = OutingGuest.new(:outing_id => params[:outing_id])
#outing_guest.user_id = params[:user_id]
if #outing_guest.save
flash[:notice] = "Guest added successfully"
redirect_to({ :action => 'outing', :id => params[:outing_id] })
else
flash[:notice] = "Guest could not be added"
redirect_to({ :action => 'outing', :id => params[:outing_id] })
end
end
Is there any reason Rails would be unable to detect my controller or its actions?
EDIT: Here's part of the results from rake routes
outing_add_guests GET /outings/:outing_id/add_guests(.:format) outings#add_guests
POST /outings/:outing_id/add_guests(.:format) outings#add_guests
I notice your link_to is not consistent with the other routes
outing_add_guests_path
outings_add_guests_path
Did you do rake routes to verify that outing_add_guests_path exists?
EDIT:
Your rake routes shows you need an outing_id so your routes aren't setup right (at least not for the POST). I'd fix them the way #RyanBigg is suggesting.
You should be defining these routes using the collection method:
resources :outings do
collection do
get :add_guests
post :add_guests
delete :remove_guests
end
end
What this will do is define new routes for the specified actions, as well as automatically defining the routing helpers for those routes. For more information please read the Routing Guide.