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# File 'lib/friendly_slug/active_record/base.rb', line 4
def build_friendly_slug(*attribute_list, use: nil)
instance_variable_set("@_friendly_attribute_list", attribute_list)
instance_variable_set("@_friendly_use_key", use)
instance_eval do
def _friendly_attribute_list
@_friendly_attribute_list
end
_friendly_attribute_list.each do |attribute|
define_singleton_method :"_friendly_#{attribute.to_s}_key" do
instance_variable_set("@_friendly_#{attribute.to_s}_key", attribute)
end
end
def _friendly_use_key
@_friendly_use_key
end
def find_slugged(id)
find(id.split("-").send(_friendly_use_key))
end
end
class_eval do
before_save :_update_slug
def to_param
if self.respond_to?(:slug)
if self.slug.nil? || _unique_attribute_changed?
_create_slug
else
self.slug
end
else
_create_slug
end
end
private
def _lookup_key(k)
k.is_a?(Symbol)? self.send(k) : k.to_s
end
def _update_slug
if self.class._friendly_use_key == :database
current_slug = self.to_param
unless _slug_exists?(current_slug)
self.slug = current_slug
else
self.slug = [current_slug.to_s, SecureRandom.hex(6)].join("-")
end
end
end
def _create_slug
fresh_slug = self.class._friendly_attribute_list.map do |attribute|
_lookup_key(self.class.send("_friendly_#{attribute.to_s}_key")).to_s
end.
join("-").
gsub(/<\/?[^>]*>|[^\.\w\s-]/, '').
strip.downcase.gsub(/\s{1,}|\./, '-').
gsub(/-{2,}/, "-")
fresh_slug[-1] == "-" ? fresh_slug[0...-1] : fresh_slug
end
def _unique_attribute_changed?
self.send("#{self.class.send("_friendly_attribute_list").first.to_s}_changed?".to_sym)
end
def _slug_exists?(current_slug)
self.class.where("slug = ? AND id != ?", current_slug, self.id.nil? ? "NULL" : self.id).any?
end
end
end
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