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# ActsAsSlugged
#
# This module automatically generates slugs based on the :to_s field using a before_validation filter
#
# Mark your model with 'acts_as_sluggable' make sure you have a string field :slug
module ActsAsSlugged
extend ActiveSupport::Concern
module ActiveRecord
def acts_as_slugged(options = nil)
raise 'must respond to slug' unless new().respond_to?(:slug)
include ::ActsAsSlugged
end
end
included do
extend FinderMethods
before_validation { self.slug ||= build_slug }
validates :slug,
presence: true, uniqueness: true, exclusion: { in: excluded_slugs }, length: { maximum: 255 },
format: { with: /\A[a-zA-Z0-9_-]*\z/, message: 'only _ and - symbols allowed. no spaces either.' }
end
module ClassMethods
def relation
super.tap { |relation| relation.extend(FinderMethods) }
end
def excluded_slugs
::ActiveRecord::Base.connection.tables.map { |x| x }.compact
end
end
module FinderMethods
def find(*args)
return super unless args.length == 1
return super if block_given?
where(slug: args.first).or(where(id: args.first)).first || raise(::ActiveRecord::RecordNotFound.new("Couldn't find #{name} with 'slug'=#{args.first}"))
end
end
# Instance Methods
def build_slug
slug = self.to_s.parameterize.downcase[0, 250]
if self.class.excluded_slugs.include?(slug)
slug = "#{slug}-#{self.class.name.demodulize.parameterize}"
end
if (count = self.class.where(slug: slug).count) > 0
slug = "#{slug}-#{count+1}"
end
slug
end
def to_param
slug
end
end
Version data entries
28 entries across 28 versions & 1 rubygems