default_scope with：include option rails 3.2

我正在将rails3应用升级到3.2.6 我对带有选项的不推荐的default_scope有一些问题。default_scope with：include option rails 3.2

我有几个模型的活动和网站，通过campaign_sites与许多关系。

class Campaign < ActiveRecord::Base 
    has_many :campaign_sites, :dependent => :destroy 
    .... 
end 

class Site < ActiveRecord::Base 
    has_many :campaign_sites, :dependent => :destroy 
    has_many :campaigns, :through => :campaign_sites 
    ... 
end 

class CampaignSite < ActiveRecord::Base 
    default_scope :include => [:campaign, :site], :order => :'sites.name' 
    belongs_to :campaign, :touch => true 
    belongs_to :site, :touch => true 
    ... 
end

这是工作正常与rails 3.0.10但升级到3.2.6后，我得到以下mysql错误与此行。

default_scope :include => [:campaign, :site], :order => :'sites.name' 

Mysql2::Error: Unknown column 'sites.name' in 'order clause': SELECT `campaigns`.* FROM`campaigns` INNER JOIN `campaign_sites` ON `campaigns`.`id` = `campaign_sites`.`campaign_id` WHERE `campaign_sites`.`site_id` = 11377 ORDER BY campaigns.name, sites.name

来源

2012-07-02 venkatareddy

这很可能是包含在3.0.10和3.2.6之间工作的变化。现在不用进行单个查询，而是通过多个查询来进行急切的加载。我只想在坚持一个joins选项有那么它明确地与站点表连接：

default_scope :include => [:campaign, :site], :order => :'sites.name', :joins => :sites

来源

2012-07-02 12:15:21

我试着用'：include'在3.2.6和它的作品。很可能，数据库结构存在问题。 –

@WawaLoo，我甚至用：joins =>：sites，但它没有奏效。你能提供关于你正在谈论的db结构的更多信息吗？ – venkatareddy

它仍然会产生相同的SQL吗？ –

default_scope with：include option rails 3.2

回答

相关问题