I have two models, links and tags, associated through a 3rd model,
link_tags. I added the following to my link model,
has_many :tags, :through => :link_tags
has_many :link_tags
accepts_nested_attributes_for :tags, :allow_destroy => :false,
:reject_if => proc { |attrs| attrs.all? { |k, v| v.blank? } }
and put this in a partial called by the new and edit forms for links,
<%= f.error_messages %>
<p>
<%= f.label :uri %><br />
<%= f.text_field :uri %>
</p>
<p>
<%= f.label :title %><br />
<%= f.text_field :title %>
</p>
<h2>Tags</h2>
<% f.fields_for :tags do |tag_form| %>
<p>
<%= tag_form.label :name, 'Tag:' %>
<%= tag_form.text_field :name %>
</p>
<% unless tag_form.object.nil? || tag_form.object.new_record? %>
<p>
<%= tag_form.label :_delete, 'Remove:' %>
<%= tag_form.check_box :_delete %>
</p>
<% end %>
<% end %>
<p>
<%= f.submit 'Update' %>
</p>
The POST on submit fails with the following error:
Tag(#-621698598) expected, got Array(#-609734898)
Does anyone know the necessary steps to do this? I've been basing it
off the multi-model section of this:
http://guides.rubyonrails.org/getting_started.html
, but it seems incomplete for has_many => :through.
Thanks,
Andrew
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