Hello, I'm triying to set a form but I'm having problems.These are my
models:
class Post < ActiveRecord::Base
has_many :taggings, :dependent => :destroy
has_many :tags, :through => :taggings
accepts_nested_attributes_for :taggings, :limit => 3
end
class Tag < ActiveRecord::Base
has_many :taggings, :dependent => :destroy
has_many :posts, :through => :taggings
end
class Tagging < ActiveRecord::Base
belongs_to :advert
belongs_to :tag
end
In my view posts/_form.html.erb:
<%= form_for @post do |f| %>
<%= f.fields_for :taggings do |t| %>
<% t.collection_select :tag_id, Tag.all, :id, :name, { :selected
=> @post.tag_ids }, { :multiple => true } %>
<% end %>
<% end %>
The problem is that I want a MULTIPLE select control for this
application but that seems incompatible with the
accepts_nested_attributes_for is expected. This control return an
array of options selected, like this:
- One option selected ==>
"post"=>{"taggings_attributes"=>{"0"=>{"tag_id"=>["1"]}}}
- Two options selected ==>
"post"=>{"taggings_attributes"=>{"0"=>{"tag_id"=>["1","2"]}}}
Instead, the accepts_nested_attributes_for is expected something like
this:
- One option selected ==>
"post"=>{"taggings_attributes"=>{"0"=>{"tag_id"=>"1"}}}
- Two options selected ==>
"post"=>{"taggings_attributes"=>{"0"=>{"tag_id"=>"1"},"1"=>{"tag_id"=>"2"}}}
I'm already clouded with this. One solution is to use a
collection_select control without multiple but I hope may have other
better solution.
Thanks very much. Daniel.
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