SimpleForm (1.4.x) input for mongoid_taggable -- place in app/inputs

tags_input.rb

# Input builder to render tags from an Array field, for use with my fork
# of mongoid_taggable:
#
#   https://github.com/ches/mongoid_taggable
#
class TagsInput < SimpleForm::Inputs::StringInput

  map_type :tags, :to => :text_field

protected

  def html_options_for(namespace, extra)
    formatted_tags = object.send(attribute_name).
                            try(:join, "#{object.send(:tags_separator)} ")
    super.merge(:value => formatted_tags)
  end

end

Using simple_form (1.5.2) and this snippet, I get the following error message:

     ActionView::Template::Error:
       undefined method `map_type' for TagsInput:Class

when I remove map_type, I need to add

f.input :tags, as: :tags

The html created looks like this:

<div class="input string tags optional" value="Tag1, Tag2, Tag3">
  <label class="tags optional" for="work_breakdown_structure_tags_tag1_tag2_tag3"> Tags</label>
  <input class="string tags optional" id="work_breakdown_structure_tags" name="work_breakdown_structure[tags]" size="50" type="tags" value="Tag1, Tag2, Tag3">
</div>

This is malformed html because of the value attribute in the div tag and the wrong for attribute in the label tag

Any other idea how to set the input.value attribute?

Sorry, this was written for SimpleForm 1.4.x. I haven't updated yet, so I'm not sure how the API has changed.