Using same form and form_for in Rails with nested resources in namespace

Question

I have a resource that's accessible both with and without a namespace.

# routes.rb
resources :foo
namespace :admin do
  resources :foo
end

I want to use the same _form partial in both cases, but form_for requires a different argument depending upon the controller.

Should I set the form_for argument in the controllers?

# foo_controller.rb
def set_foo
  @form_for_arg = @foo
end

# admin/foo_controller.rb
def set_foo
  @form_for_arg = [:admin, @foo]
end

Ryan Bigg · Accepted Answer · 2015-01-05 04:04:04Z

2

Put the common features of the form inside the partial, and wrap it in the individual form_for:

<%= form_for [:admin, foo] do |f| %>
  <%= render "foos/form", f: f %>
<% end %>

And:

<%= form_for [foo] do |f| %>
  <%= render "foos/form", f: f %>
<% end %>

edited Jan 5, 2015 at 4:04

answered Jan 5, 2015 at 3:58

Ryan Bigg

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2 Comments

rb- Over a year ago

Will f be available in that partial? Wouldn't I need to use render "foos/form", f: f

Ryan Bigg Over a year ago

My mistake. My original answer didn't have the local variable passing that you need: f: f. You can also do: render partial: "foos/form", locals: { f: f } but I prefer the shorter version.

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