排除一些IDS从结果的Rails的ActiveRecord [英] Exclude some ids from result in Rails ActiveRecord

问题描述

我已经从一些路段下面的语句查询文章

I have following statement for query articles from some sections

Article.all(:joins => :sections, :conditions => { :sections =>{ :id => [3, 4, 6, 7, 8, 9] }, :id_not_in => @some_ids  }, :limit => 4)

变量@some_ids是数组文章IDS至极必须排除的结果。

Variable @some_ids is array with ids of articles wich must be excluded from result.

推荐答案

如果文章 的has_many：部分，尝试

Article.find(:all, :joins => :sections, :conditions => ["sections.id IN (?) AND
   id NOT IN (?)", [1,2,3], @some_ids], :limit => 4)

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