slim-select_tags.md

Slim Select

Tagging

To allow selecting multiple values, you can use the :tags input type:

f.input :names, as: :tags

You can load previously created tags using collection option passing an array of strings like this:

f.input :names, as: :tags, collection: ['Diego', 'Leandro', 'Guillermo']

Tagging with Active Record collections

To use tagging functionality with Active Record collections you need to do something like this:

class Event < ActiveRecord::Base
  has_and_belongs_to_many :performers
end

class Performer < ActiveRecord::Base
  has_and_belongs_to_many :events
end

So, in the ActiveAdmin's Event form, you can add:

f.input :performer_ids, as: :tags, collection: Performer.all, display_name: :full_name

Remember: the input name must be: performer_ids not performers.

⚠️ Gotchas

Note that this input type uses a regular select with multiple: true under the hood. As such, it also returns an array of string, so remember to add your attribute as an array to the permitted_params, such as performer_ids: [].

Moreover, this input is subject to this same limitation that multiple select inputs have: the returned array will always contain an empty string. When using with AR relations or something like ActsAsTaggableOn this shouldn't be an issue, as an empty string won't trigger the creation of a new record. However, in other cases, like when using postgres array column, this might be a problem. Be sure to sanitize this value before saving in those cases.

Options

• display_name: (optional) You can pass an optional display_name to set the attribute (or method) to show results on the select. It defaults to: name
• value: (optional) You can pass an optional value to set the attribute (or method) to use when an item is selected. It defaults to: id
• width: (optional) You can set the select input width (px or %).