CODEWITHSUNDEEP
ruby-on-railsruby
Bogdan Popa
Bogdan Popa

Reputation: 1099

rails partial render gives undefined methods for nil:NilClass

I'm rendering a partial from an offer's view:

<%= render partial: 'parent_offers_table', locals: { :parent_offers => [offer.parent_offer] } %>

And then, in _parent_offers_table:

<%= render partial: 'parent_offer', collection: parent_offers %>

However, in _parent_offer I cannot do anything with the parent_offer variable. I get undefined methods for nil:NilClass:

<tr>
    <td><%= parent_offer.created_at %></td>
    <td><%= parent_offer.version %></td>
    <td><%= parent_offer.client.try(:name) %></td>
    <td>
    ............

What am I doing wrong? Thanks!

Upvotes: 0

Views: 1021

Answers (2)

Richard Peck
Richard Peck

Reputation: 76774

Collection

<%= render partial: "parent_offer", collection: parent_offers, as: :parent_offer %>

Although the collection partial rendering functionality is truly amazing, we found it has one major drawback, in that it's very difficult to manage the object you call in the partial itself.

If you're calling your own object name, you'll be best to use the as: argument to define the local variable:

To use a custom local variable name within the partial, specify the :as option in the call to the partial:

<%= render partial: "product", collection: @products, as: :item %>

With this change, you can access an instance of the @products collection as the item local variable within the partial.

Upvotes: 1

Igor Guzak
Igor Guzak

Reputation: 2165

instead:

<%= render partial: 'parent_offer', collection: parent_offers %>

try: 

<%= render partial: 'parent_offer', locals: {parent_offers: parent_offers} %>

or:

<%= render 'parent_offer', parent_offers: parent_offers %>

Upvotes: 1

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