Form helpers and partial

Rails
1

Hi,

I’m trying to use a partial in my form (Rails 2.3.4), and the docs I see
say I can do this:

edit.html.erb:
<% form_for(@course) do |f| %>
<%= render :partial => f %>

<%= f.submit "Update" %>

<% end %>

_form.html.erb:

Title: <%= f.text_field :title %>

But when I go to the edit page I get an error:

undefined local variable or method `f’ for #ActionView::Base:0x465873c

If I change the render line to be:
<%= render :partial => “form”, :locals => {:f => f} %>

it works, but the latest updates say I don’t need to do that.

Am I missing something?

Thanks.

2

John T. wrote:

Hi,

I’m trying to use a partial in my form (Rails 2.3.4), and the docs I see
say I can do this:

edit.html.erb:
<% form_for(@course) do |f| %>
<%= render :partial => f %>

<%= f.submit "Update" %>

<% end %>

_form.html.erb:

Title: <%= f.text_field :title %>

Well, slight update. I found that if I change my form partial to be:

<%= form.text_field :title %>

it works. I can live with that.

But… reading the updates to rails and forms and partials, it says you
can shortcut it more by doing:
<%= render @course %>

I found that Rails will look for the partial named: _course.html.erb.
Ok, I copied my form partial, but it doesn’t like any of my ‘form
helper’ variables - f.text_field, form.text_field, or course.text_field.
Is this possible?

thanks again

3

On Sep 15, 4:30 pm, “John T.” [email protected]
wrote:

Well, slight update. I found that if I change my form partial to be:

<%= form.text_field :title %>

it works. I can live with that.

Correct. The magical partial variable has the same name as the partial
itself

But… reading the updates to rails and forms and partials, it says you
can shortcut it more by doing:
<%= render @course %>

I found that Rails will look for the partial named: _course.html.erb.
Ok, I copied my form partial, but it doesn’t like any of my ‘form
helper’ variables - f.text_field, form.text_field, or course.text_field.
Is this possible?

You would need to pass (via locals etc.) the form builder object.

Fred