我想为我的费率行动创建一个after_save方法.它会划分rating_score / rating并更新列的等级.
class KonkurrancersController < ApplicationController
def rate
@konkurrancer = Konkurrancer.find(params[:id])
@container = "Konkurrancer"+@konkurrancer.id.to_s
@konkurrancer.rating_score += params[:vind][:rating].to_i
@konkurrancer.ratings += 1
@konkurrancer.save
respond_to do |format|
format.js
end
end
end
这是我的模特儿：
class Konkurrancer < ActiveRecord::Base
after_save :do_foobar
private
def do_foobar
rating_score = self.rating_score
ratings = self.ratings
rating = (rating_score/ratings)
self.update_attributes(:rating => rating)
end
end
我的导轨日志：
Started POST "/konkurrancers/rate/46" for 127.0.0.1 at 2011-04-26 23:40:56 +0200
Processing by KonkurrancersController#rate as */*
Parameters: {"utf8"=>"Ô£ô","authenticity_token"=>"MACFM37hX4S6XA9vryn7gtfl21P
vcaPBSiKDI8mfurg=","vind"=>{"rating"=>"4"},"id"=>"46"}
←[1m←[36mKonkurrancer Load (1.0ms)←[0m ←[1mSELECT `konkurrancers`.* FROM `kon
kurrancers`←[0m
←[1m←[35mCACHE (0.0ms)←[0m SELECT `konkurrancers`.* FROM `konkurrancers`
←[1m←[36mCACHE (0.0ms)←[0m ←[1mSELECT `konkurrancers`.* FROM `konkurrancers`←
[0m
←[1m←[35mKonkurrancer Load (1.0ms)←[0m SELECT `konkurrancers`.* FROM `konkurr
ancers` WHERE (`konkurrancers`.`cached_slug` = '46') LIMIT 1
←[1m←[36msql (2.0ms)←[0m ←[1mSELECT sluggable_id FROM slugs WHERE ((slugs.slu
ggable_type = 'Konkurrancer' AND slugs.name = '46' AND slugs.sequence = 1))←[0m
←[1m←[35mKonkurrancer Load (1.0ms)←[0m SELECT `konkurrancers`.* FROM `konkurr
ancers` WHERE (`konkurrancers`.`id` = 46) LIMIT 1
←[1m←[36msql (0.0ms)←[0m ←[1mBEGIN←[0m
←[1m←[35mLink Load (1.0ms)←[0m SELECT `links`.* FROM `links` WHERE (`links`.k
onkurrancer_id = 46) LIMIT 1
←[1m←[36msql (0.0ms)←[0m ←[1mROLLBACK←[0m
Rendered konkurrancers/_rating.html.erb (1.0ms)
Rendered konkurrancers/rate.js.erb (22.0ms)
Completed 200 OK in 606ms (Views: 286.0ms | ActiveRecord: 6.0ms)
我应该如何创建这个？
解决方法
你想要的是一个回调.您可以在Konkurrancer模型上创建一个after_save回调,该模型在为该模型调用save()方法后触发.
例如：
class Konkurrancer < ActiveRecord::Base
after_save :do_foobar
private
def do_foobar
rating_score = self.rating_score
ratings = self.ratings
rating = (rating_score/ratings)
self.update_attributes(:ratings => rating)
end
end
[编辑]您应该使用自己,因为您正在编辑的模型是模型本身.测试它,并应用必要的逻辑/实现.
看看这个guide了解更多信息.
希望有帮助！