Forcing link_to 'put'

Rails
1

I cannot force my link_to statement to send an HTTP put into my
controller’s update method. It appears to be using get and therefore
invoking the show method. Here is what my view looks like (I am using
nested resources where item :has_many :costs):

<%= link_to ‘Recalculate’, item_cost_path(:recalc => 1), :method
=> :put, :action => :update %>

When I click on the link in a browser:

Unknown action
No action responded to show. Actions: create, destroy, edit, index,
new, and update

I have tried many variations of link_to arguments and have been unable
to make this work. Out of ideas, so I’m hoping you can help.

Thanks!
Mark

2

What happens if you remove “:action => :update”? Shouldn’t be necessary
cause put automatically calls the update method.

3

Unfortunately that does not work. Same error, as if link_to is
ignoring the :method argument and defaulting to get/show.

4

On 17 April 2010 07:16, MarkB [email protected] wrote:

Unfortunately that does not work. Same error, as if link_to is
ignoring the :method argument and defaulting to get/show.

Have you checked the html generated by the link, and looked in the log
to see if anything useful there?

Colin

5

Colin L. wrote:

Have you checked the html generated by the link, and looked in the log
to see if anything useful there?

Colin

Yeah, what’s the output of
<%= link_to ‘Recalculate’, item_cost_path(:recalc => 1), :method
=> :put %>?

6

btw, found not much time ago, that you need to do
:conditions => {:method => :put}
instead of just
:method => :put
in routes.rb when define a route

’

7

On 17 April 2010 09:29, Heinz S. [email protected] wrote:

Colin L. wrote:

Have you checked the html generated by the link, and looked in the log
to see if anything useful there?

Colin

Yeah, what’s the output of
<%= link_to ‘Recalculate’, item_cost_path(:recalc => 1), :method
=> :put %>?

What have you got?

Colin

8

The answer to seemingly broken rails behavior is usually “duh…I
should have realized that!”

My link_to syntax was fine. The HTTP put was successfully finding the
correct controller method, but that method was performing a redirect
that was failing (in a rather opaque way to me) because in this
particular code path I did not initialize an instance variable (@item)
that was the parameter to the redirect because I was bypassing a
form_for…submit action that otherwise passes in the item.id:

redirect_to edit_item_cost_path(@item, @cost)

It appears that this RESTful helper fails with a not-too-insightful
error when passed a bogus parameter.

Thanks everyone who pitched in with suggestions and pointers.

Mark