I implemented this link:
View:
<li><%= link_to "Trainer-Sportler", :controller => "trainerones", :action => "trspmatch" %></li>
controller:
def trspmatch
render :trspmatch
end
and one view trspmatch.html.erb
Rails says:
Unknown action
The action 'show' could not be found for TraineronesController
When i implemented def show end and create a show.html.erb. Rails opens the show.html.erb not the trspmatch.html.erb?
You probably want to define your trainerones resource like this:
resources :trainerones do
collection do
get 'trspmatch'
end
end
that will expose a url /trainerones/trspmatch that maps to TraineronesController#trspmatch. It seems that a look at this link will help you understand routes better.
In any case, you will benefit a lot from running rake routes in your console, which will display all your routes and how they map to your controllers methods. Try before and after rewriting your trainerones resource as I explained above, and you'll see the difference. Good luck!
Related
So basically I want to use a simple controller method with no params:
def create_message
#a = Message.create(:body => "Hello")
#a.save
redirect_to messages_path
end
but i'm routing from the home page, pages controller:
def home
end
I'm having a problem figuring out what to write in the routes file, I've tried almost everything including but not limited to:
resources :pages do
collection do
get :create_message
end
end
Views:
<%= link_to "Create Message", create_message_pages_path, class:"btn btn-primary"%>
Error:
The action 'create_message' could not be found for PagesController
You can create custom route for create_message like this
#routes.rb
get 'create_message' => 'pages#create_message', as: 'create_message'
Then link_to would be:
#view
<%= link_to "Create Message", create_message_path, class:"btn btn-primary"%>
I faced this problem once, in my case it is defining action under private block of controller gave the "The Action could not be found error". From your question I see there is no problem in defining routes and using it in view file. Please check to see if the create_message action is defined under private block in pages_controller.rb file. Hope it helps.
I am doing a simple CR and trying to put some link/button(add,edit etc), when the user will click the add it will direct to that view..
Question: How should I indicate which view will be load when I click the specific link/button?
Index.html.erb
<h1>My First CRUD!</h1>
<%= link_to "Add Page", posts_path %>
<%= link_to "Edit Page", posts_path %>
<%= link_to "Showx Page", posts_path %>
Posts Controller
class PostsController < ApplicationController
def index
end
def addItem
end
def create
#post = Post.new(post_params)
#post.save
redirect_to #post
end
def show
#post = Post.find(params[:id])
end
private
def post_params
params.require(:post).permit(:item, :description)
end
end
Routes
Rails.application.routes.draw do
# For details on the DSL available within this file, see http://guides.rubyonrails.org/routing.html
resources :posts
root "posts#index"
resources :posts
root "posts#addItem"
You can declare all the root routes that you want in your routes.rb, but it'll take just the one that was declared first, it doesn't matter if the definition has some mistake, it won't tell you.
And the route where the link_to will redirect is what you declare as second argument (in this case).
In your example you have three link_totags, which are pointing to the same path. If you'd like to make the "Edit" link_toredirect to the posts#edit method you firstly must create the edit method in your posts_controller and then add it to your route as:
get '/posts/edit/:id', to: 'posts#edit'
But in your case as you have resources :posts it makes the whole work for you and creates all the routes defined in the posts#controller, what resources do is to map a number of related requests to actions in a single controller, that's to say;
When Rails application receives a request for:
GET /posts/edit/1
That's what happen when you go to edit the a certain post by passing the id of 1, then it asks the router to map it to a controller action. If the first matching route is:
resources :posts
Then Rails dispatchs that request to the edit action on the posts controller with { id: '1' } in params.
Short answer, to create a common <a> tag create a link_to, add a text to specify to where will this redirect, then the route that you've defined, you can check them by running rails routes if you're using Rails 5 or bin/rake routes if you're with Rails < 5.
I am new to ruby on rails and stuck to very basic problem.I have created a controller named as custom_hello and define 2 methods. what i want is when i click on the link it will take me to next page which is under the same controller.i just don't know how to configure the routes properly.Any help would be appreciated...
Here it is:
app/controllers/custom_hello_controller.rb
class CustomHelloController < ApplicationController
def method1
end
def method2
end
end
config/routes.rb
get 'custom_hello/method1'
get 'custom_hello/method2'
Create 2 files in your views:
app/views/custom_hello/method1.html.erb
app/views/custom_hello/method2.html.erb
You can create links with:
<%= link_to 'Method 1', custom_hello_method1_path %>
<%= link_to 'Method 2', custom_hello_method2_path %>
However, you may consider creating RESTful controllers and routes. Please read here
<%= link_to 'link_name', :action => 'Your_method_name', :controller => 'custom_hello' %>
now you need to write 'custome_hello/Your_method_name' in your routes.rb and create Your_method_name.html.erb page in that controller when you click on link you will navigate to Your_method_name.html.erb page try it, this will work.
I am looking to use link_to to call a method in my controller. However, for some odd reason the route looks for the show method.
In my view:
<% #beverages.each do |beverage| %>
..
<%= link_to 'Archive', beverages_archive_path(:id => beverage.id) %>
..
<% end %>
In my config/routes.rb
match 'beverages/archive' => 'beverages#archive'
In my beverages_controller.rb
def archive
beverage = Beverage.find(params[:id])
respond_to do |format|
# format.html # show.html.erb
format.json { render json: beverage }
end
# beverage.update_attribute('archive', true)
end
When I click on the archive link in the view, the URL does change to: http://localhost:3000/beverages/archive?id=11, however I get the following error.
The error I get:
ActiveRecord::RecordNotFound (Couldn't find Beverage with id=archive):
app/controllers/beverages_controller.rb:46:in `show'
Any idea on what I am doing wrong? Your help is much appreciated!
PS. I also looked at Rails 3 link_to delete destory method calls show method?
but nothing seemed to work.
Have you tried this in your routes?
match 'beverages/:id/archive' => 'beverages#archive', as: :beverages_archive
This will create the beverages_archive_path method for you. Also, as you are looking for a specific beverage, use :id inside the route so that it knows where to take the id parameter from.
Apart from that, you can always tell a link specifically which controller and action to link to by doing:
link_to "Label", :controller => :my_controller, :action => :index
Taken from here: Ruby on rails 3 link_to controller and action
Use the other notation (not match) instead.
resources :beverages do
collection do
get :archive
end
end
Try this one out and let me know if something went wrong.
There's not quite enough information here to know why beverages_archive_path works in your app -- one problem is that your routes file does not define a name for your beverages#archive route. What you want is something like:
match 'beverages/archive' => 'beverages#archive', :as => :beverages_archive
or better yet use resourceful routing conventions like so:
resources :beverages do
collection do
get :archive
end
end
What's happening is that you have a beverages#show route that matches /beverages/:id, and this is what /beverages/archive matches (with :id => 'archive').
Let me preface this by saying, i'm pretty new to rails and programming.
I'm trying to make some links to toggle a boolean attribute on and off. I've essentially succeeded in doing it on a non-nested resource by doing the following:
Route:
resources :my_resource do
get 'toggle_attribute', :on => :member
end
Controller:
def toggle_attribute
#resource = Resource.find(params[:id])
#resource.toggle!(:attribute)
end
View:
<%= link_to "Toggle Resource", toggle_attribute_resource_path(#resource), :remote => true %>
First, like I said above, this works on my non-nested route, however no matter what solution I try to add to the controller I can't get my link to flash a message or re-direct to anything when clicked, you click the button and nothing happens, you have to manually refresh to see the change.
Second, I can't figure out how to get this same sort of thing to work on a route that is nested like so:
Route:
resources :resource_1 do
resources :resource_2
end
Can anyone give me some tips?
Thanks a ton in advance. This stuff has been driving me batty.
By using remote => true, you are telling it to make an ajax call. This means that you need to also add a toggle_attribute.js.erb file in your views folder and in that file use javascript to replace the link element or text with what you want.
Also make sure to respond to js by setting respond_to :html, :js at the top of your controller.
repond_to :html, :js
def toggle_attribute
#resource = Resource.find(params[:id])
#resource.toggle!(:attribute)
end
toggle_attribute.js.erb :
$('#toggler').html("my new html here");
in view:
<%= link_to "Toggle Resource", toggle_attribute_resource_path(#resource), :remote => true, :id => "toggler"%>
Update:
For your nested route try this:
resources :resource_1 do
resources :resource_2 do
member do
get :toggle_attribute
end
end
end
your path would be something like:
toggle_attribute_resource_1_resource_2_path(#resource, #resource2)