Class: ActsAsTaggableSimple::Tag

Inherits:
ActiveRecord::Base
  • Object
show all
Includes:
Mongoid::Document
Defined in:
lib/mongoid/tag.rb,
lib/active_record/tag.rb

Overview

ActiveRecord model for storing a tag in the database.

Tags have only one attribute: name, which is just the text representation of the tag. name must be unique for each instance.

Class Method Summary collapse

Class Method Details

.find_by_names(names) ⇒ Object 



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# File 'lib/mongoid/tag.rb', line 40

def self.find_by_names(names)
  where(:name.in => names)
end

.find_or_create_all_tags(list) ⇒ Object

Finds or creates all of the tags contained in list and returns them.

list is an Array of String's containing the +name+'s of the desired tags. If an ActsAsTaggableSimple::Tag does not yet exist for a tag, then it is created, otherwise the already existing tag is used.

Empty database example:

tags = ActsAsTaggableSimple::Tag.find_or_create_all_tags(%w{rails css html})

Will create 3 new ActsAsTaggableSimple::Tag objects and save them to the database.

If rails, css, and html tags already exist in the database, then the following example will only create 1 new tag.

tags = ActsAsTaggableSimple::Tag.find_or_create_all_tags(%w{rails css html javascript})


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# File 'lib/mongoid/tag.rb', line 29

def self.find_or_create_all_tags(list)
  existing_tags = Tag.where(:name.in => list)
  create_tags_list = list - existing_tags.map(&:name)

  create_tags = create_tags_list.collect do |tag|
    Tag.create!(:name => tag)
  end

  create_tags + existing_tags.all
end