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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 Base def acts_as_slugged(options = nil) include ::ActsAsSlugged end end included do extend FinderMethods before_validation do assign_attributes(slug: build_slug) if slug.blank? end 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 = 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_was || slug end end
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3 entries across 3 versions & 1 rubygems