A friend of mine just realize that the problem is related to the
javascript add function.
And now I'm trying to fix it.
<div><%= add_child_link "Add Part", f, :item %></div>
on my Item model I hold the accepts_nested_attributes_for :item_parts
but I still getting a error
undefined method `klass' for nil:NilClass
this error refers to the object variable on this:
def add_child_link(name, form_builder, association)
object =
form_builder.object.class.reflect_on_association(association).klass.new
...
end
any help?
On Aug 4, 8:13 pm, Kleber Shimabuku <[email protected]> wrote:
> I'm using nested_attributes and trying to implement the add/remove
> fields on-the-fly throu ajax following Ryan Bates screencast about
> Nested Model (#196)
>
> Doing this, it works fine:
>
> <%= f.fields_for :item_parts do |parts_form| %>
> <p class="fields">
> <%= parts_form.label :part_id %>
> <%= parts_form.select :part_id, Part.all.collect { |x|
> [ x.title, x.id ]} %><br />
> <%= parts_form.hidden_field :_destroy %>
> <%= link_to_remove_fields "remove", parts_form %>
> </p>
> <% end %>
>
> But when trying to pass the form fields to a partial like this, it
> returns the following error:
>
> undefined method `part_id' for #<Part:0x00000103c4fed8>
>
> Extracted source (around line #3):
>
> 1: <p class="fields">
> 2: <%= f.label :part_id %>
> 3: <%= f.select :part_id, Part.all.collect { |x| [ x.title,
> x.id ]} %><br />
> 4: <%= f.hidden_field :_destroy %>
> 5: <%= link_to_remove_fields "remove", f %>
> 6: </p>
>
> The relevant code for the form calls the partial:
>
> <%= f.fields_for :item_parts do |parts_form| %>
> <%= render 'part_fields', :f => parts_form %>
> <% end %>
>
> partial: /part_fields.html.erb
>
> <p class="fields">
> <%= f.label :part_id %>
> <%= f.select :part_id, Part.all.collect { |x| [ x.title, x.id ]}
> %><br />
> <%= f.hidden_field :_destroy %>
> <%= link_to_remove_fields "remove", f %>
> </p>
>
> So, any help on what I am doing wrong at this point?
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