Ruby on Rails Undefined method

Question

I was going to create a link to a controller's action update_heimdall here is the code:

app/controller/admins_controller:

  def heimdall
    @headline = "Heimdall"
    @users = User.where(deleted_at: nil)
    authorize @users
    @focusUser = params['users'].blank? ? current_user : User.find(params['users'])
    heim = Heimdall.new
    @cards = heim.get_cards(@focusUser.trello_id, @focusUser.trello_access_token, @focusUser.trello_secret_token)
  end

  def update_heimdall 
    @user = params['users'].blank? ? current_user : User.find(params['users'])
    authorize @user
    heim = Heimdall.new
    heim.update_cards(@user.trello_id, @user.trello_access_token, @user.trello_secret_token)
  end

app/views/admins/heimdall.html.rb:

<%= link_to "Odśwież", update_heimdall(), class: "btn btn-warning" %>

I am enclosing as well listing from rails routes command:

heimdall GET    /heimdall(.:format) admins#heimdall                                        
update_heimdall GET   /heimdall/update_heimdall/:id(.:format)   admins#update_heimdall

Unfortunately this code causes the following error:

undefined method `update_heimdall'.

Ashish Jambhulkar · Accepted Answer · 2017-08-25 12:10:10Z

2

As in your code, convert heim in to an instance variable @heim so that you can access it in views. then call specifiy the object in action path.

When you performed rake routes you will get all the paths on left side

heimdall GET    /heimdall(.:format) admins#heimdall                                        
update_heimdall GET   /heimdall/update_heimdall/:id(.:format)   admins#update_heimdall

therefore your code should be:

<%= link_to "Odśwież", update_heimdall_path(@heim), class: "btn btn-warning" %>

for more information you can checkout this ruby on rails guide: http://guides.rubyonrails.org/getting_started.html

edited Aug 25, 2017 at 12:10

answered Aug 25, 2017 at 11:57

Ashish Jambhulkar

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2 Comments

Pavan Over a year ago

Also, the route requires an :id to be passed. Your code will still error out.

Borbat Over a year ago

I got what was the problem. I didn't add _path at the end, my bad. Thank you.

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