Nested partial, locals, and NameError

I have a _form partial shared by new and edit actions. I render the partials like so:

    <%= render :partial => 'form', :locals => { :f => f } %>

The partial looks (more or less) like this:

    <%= f.error_messages %>     ...

    <table id="recipe_ingredients">       <tr>         <th>ingredient</th>         <th>in units</th>         <th>quantity</th>         <th>delete?</th>       </tr>     <% f.fields_for :recipe_ingredients do |ri_f| %>       <%= render :partial => 'recipe_ingredient', :locals => { :ri_f => ri_f } %>     <% end %>     </table>     ....

As you can see, I'm rendering the _recipe_ingredient partial from the _form partial, assigning the ri_f value to the :ri_f key. The partial looks like this:

    <tr id="<%= "recipe_ingredient-#{ }"%>">       <td>         <%= ri_f.collection_select :ingredient_id, Ingredient.all, :id, :name %>       </td>       <td>         <%= :unit, RecipeIngredient::COOKING_UNITS %>       </td>       ....     </tr>

Problem: when I call one of the actions, I get the following error:

    ActionView::TemplateError (undefined local variable or     method `ri_f' for #<ActionView::Base:0xb681ecbc>) on     line #1 of app/views/recipes/_recipe_ingredient.html.erb:     1: <tr id="<%= "recipe_ingredient-#{ }"%>">     2: <td>     3: <%= ri_f.collection_select :ingredient_id, Ingredient.all, :id, :name %>     4: </td>

        app/views/recipes/_recipe_ingredient.html.erb:1         app/views/recipes/_form.html.erb:21         app/views/recipes/_form.html.erb:20         app/views/recipes/new.html.erb:4         app/views/recipes/new.html.erb:3         app/controllers/recipes_controller.rb:30:in `new'

I have googled around but no luck so far... The syntax and all seems ok, but it is refusing to work. If I move the code from the second partial into the _form partial, it all works.

Any idea what I should correct?

Solved. Had a link_to function using the same partial (in the code I snipped) with no locals assigned. It's fixed now.