CODEWITHSUNDEEP
ruby-on-railsrouteslink-toput
Joe
Joe

Reputation: 1765

link_to update (without form)

I want a link to update a resource, without using an HTML form.

Routes:

resources :users do
  resources :friends
end

Rake routes:

 user_friend GET /users/:user_id/friends/:id(.:format){:action=>"show", :controller=>"friends"}
             PUT /users/:user_id/friends/:id(.:format){:action=>"update", :controller=>"friends"}

I want to use the put to update a friend by a simple link, something like this:

<%= link_to "Add as friend", user_friend_path(current_user, :method=>'put') %>

But when I click the link, it tries to go into the show action.

What is the right way to do this?

Upvotes: 25

Views: 26816

Answers (3)

stevec
stevec

Reputation: 52268

In rails 7, this worked nicely for me:

<% if page.published? %>
  <%= button_to 'Unpublish', page_path(page: { status: "draft" }), { method: :patch, form: { data: { turbo: true } } } %>  
<% else %>
  <%= button_to 'Publish', page_path(page: { status: "published" }), { method: :patch, form: { data: { turbo: true } } } %> 
<% end %>

Note: you may be able to simplify it further by removing form: { data: { turbo: true } } - I only include that because I had turbo turned off by default across my app, but most people probably won't, so you could remove it.

Upvotes: 0

Andrew
Andrew

Reputation: 238667

The problem is that you're specifying the method as a URL query param instead of as an option to the link_to method.

Here's one way that you can achieve what you're looking for:

<%= link_to "Add as friend", user_friend_path(current_user, friend), method: 'put' %>
# or more simply:
<%= link_to "Add as friend", [current_user, friend], method: 'put' %>

Another way of using the link_to helper to update model attributes is by passing query params. For example:

<%= link_to "Accept friend request", friend_request_path(friend_request, friend_request: { status: 'accepted' }), method: 'patch' %>
# or more simply:
<%= link_to "Accept friend request", [friend_request, { friend_request: { status: 'accepted' }}], method: 'patch' %>

That would make a request like this:

Started PATCH "/friend_requests/123?friend_request%5Bstatus%5D=accepted"
Processing by FriendRequestsController#update as 
  Parameters: {"friend_request"=>{"status"=>"accepted"}, "id"=>"123"}

Which you could handle in a controller action like this:

def update
  @friend_request = current_user.friend_requests.find(params[:id])
  @friend_request.update(params.require(:friend_request).permit(:status))
  redirect_to friend_requests_path
end

Upvotes: 4

Jeppe Liisberg
Jeppe Liisberg

Reputation: 3804

link_to "Add as friend", user_friend_path(current_user, @friend), :method=> :put

Will insert a link with attribute 'data-method' set to 'put', which will in turn be picked up by the rails javascript and turned into a form behind the scenes... I guess that's what you want.

You should consider using :post, since you are creating a new link between the two users, not updating it, it seems.

Upvotes: 40

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