diff options
Diffstat (limited to 'activerecord/lib/active_record/integration.rb')
| -rw-r--r-- | activerecord/lib/active_record/integration.rb | 73 |
1 files changed, 64 insertions, 9 deletions
diff --git a/activerecord/lib/active_record/integration.rb b/activerecord/lib/active_record/integration.rb index 7f877a6471..15b2f65dcb 100644 --- a/activerecord/lib/active_record/integration.rb +++ b/activerecord/lib/active_record/integration.rb @@ -1,3 +1,5 @@ +require 'active_support/core_ext/string/filters' + module ActiveRecord module Integration extend ActiveSupport::Concern @@ -5,8 +7,10 @@ module ActiveRecord included do ## # :singleton-method: - # Indicates the format used to generate the timestamp format in the cache key. - # This is +:number+, by default. + # Indicates the format used to generate the timestamp in the cache key. + # Accepts any of the symbols in <tt>Time::DATE_FORMATS</tt>. + # + # This is +:nsec+, by default. class_attribute :cache_timestamp_format, :instance_writer => false self.cache_timestamp_format = :nsec end @@ -19,7 +23,7 @@ module ActiveRecord # <tt>resources :users</tt> route. Normally, +user_path+ will # construct a path with the user object's 'id' in it: # - # user = User.find_by_name('Phusion') + # user = User.find_by(name: 'Phusion') # user_path(user) # => "/users/1" # # You can override +to_param+ in your model to make +user_path+ construct @@ -31,7 +35,7 @@ module ActiveRecord # end # end # - # user = User.find_by_name('Phusion') + # user = User.find_by(name: 'Phusion') # user_path(user) # => "/users/Phusion" def to_param # We can't use alias_method here, because method 'id' optimizes itself on the fly. @@ -43,15 +47,66 @@ module ActiveRecord # Product.new.cache_key # => "products/new" # Product.find(5).cache_key # => "products/5" (updated_at not available) # Person.find(5).cache_key # => "people/5-20071224150000" (updated_at available) - def cache_key + # + # You can also pass a list of named timestamps, and the newest in the list will be + # used to generate the key: + # + # Person.find(5).cache_key(:updated_at, :last_reviewed_at) + def cache_key(*timestamp_names) case when new_record? - "#{self.class.model_name.cache_key}/new" - when timestamp = self[:updated_at] + "#{model_name.cache_key}/new" + when timestamp_names.any? + timestamp = max_updated_column_timestamp(timestamp_names) + timestamp = timestamp.utc.to_s(cache_timestamp_format) + "#{model_name.cache_key}/#{id}-#{timestamp}" + when timestamp = max_updated_column_timestamp timestamp = timestamp.utc.to_s(cache_timestamp_format) - "#{self.class.model_name.cache_key}/#{id}-#{timestamp}" + "#{model_name.cache_key}/#{id}-#{timestamp}" else - "#{self.class.model_name.cache_key}/#{id}" + "#{model_name.cache_key}/#{id}" + end + end + + module ClassMethods + # Defines your model's +to_param+ method to generate "pretty" URLs + # using +method_name+, which can be any attribute or method that + # responds to +to_s+. + # + # class User < ActiveRecord::Base + # to_param :name + # end + # + # user = User.find_by(name: 'Fancy Pants') + # user.id # => 123 + # user_path(user) # => "/users/123-fancy-pants" + # + # Values longer than 20 characters will be truncated. The value + # is truncated word by word. + # + # user = User.find_by(name: 'David HeinemeierHansson') + # user.id # => 125 + # user_path(user) # => "/users/125-david" + # + # Because the generated param begins with the record's +id+, it is + # suitable for passing to +find+. In a controller, for example: + # + # params[:id] # => "123-fancy-pants" + # User.find(params[:id]).id # => 123 + def to_param(method_name = nil) + if method_name.nil? + super() + else + define_method :to_param do + if (default = super()) && + (result = send(method_name).to_s).present? && + (param = result.squish.truncate(20, separator: /\s/, omission: nil).parameterize).present? + "#{default}-#{param}" + else + default + end + end + end end end end |