通过的has_many删除记录：通过

用户

has_many :activities 
has_many :companies through: :activities

公司

has_many :activities 
has_many :users, through: :activities

活动

belongs_to :user 
belongs_to :company

问题，当我尝试运行current_user.activities.delete_all(["company_id=?", params[:id]])或clear或destroy我得到这个错误：

ArgumentError: wrong number of arguments (1 for 0) 
    from /home/rom/.rvm/gems/[email protected]/gems/activerecord-3.2.8/lib/active_record/associations/collection_association.rb:156:in `delete_all' 
    from /home/rom/.rvm/gems/[email protected]/gems/activerecord-3.2.8/lib/active_record/associations/collection_proxy.rb:46:in `delete_all'

来源

2012-09-10 Zeck

'delete_all'并不期望参数。您正试图删除某个特定过滤条件的记录。在这里阅读文档 - http://rubydoc.info/gems/activerecord/3.2.6/ActiveRecord/Associations/CollectionAssociation:delete_all – saihgala

使用以下

Activity.delete_all(["company_id=? AND user_id=?", params[:id], current_user.id])

来源

2012-09-10 05:57:44 Salil

非常感谢。它正在工作...... :) – Zeck

通过的has_many删除记录：通过

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