Ruby查询需要更新

Question

关系:

帐户has_many用户

用户has_one sima

primary_partner_id是"account_id",它以params的形式传递.

User.where(primary_partner_id: 2).map{|a| a.sima}.reject{ |e| e.to_s.empty?}

结果如下:

 [
    #<Sima id: 93, user_id: 7, interviewer_account_user_id: 1945, interviewer_completion_date: "2017-06-09", transcriber_account_user_id: nil, transcriber_completion_date: nil, biographer_account_user_id: nil, biographer_completion_date: nil, reviewer_account_user_id: nil, reviewer_completion_date: nil, status: "accepted", autobiographical_form: "27381", autobiographical_form_completion_date: nil, sima_level_id: "1", created_at: "2017-06-06 20:17:57", updated_at: "2017-06-09 10:04:33", autobiographical_form_comments: nil, on_hold: nil, comments: [{:comment=>"easylims.xlsx", :user_name=>"Mike Burns", :created_at=>2017-06-06 20:17:57 UTC}, {:comment=>"ok", :user_name=>"SIMA Admin", :created_at=>2017-06-06 20:19:33 UTC}], interviewer_id: nil, interviewer_start_date: nil, transcriber_start_date: nil, biographer_start_date: nil, reviewer_start_date: nil>, 
    #<Sima id: 92, user_id: 1, interviewer_account_user_id: nil, interviewer_completion_date: nil, transcriber_account_user_id: nil, transcriber_completion_date: nil, biographer_account_user_id: nil, biographer_completion_date: nil, reviewer_account_user_id: nil, reviewer_completion_date: nil, status: "accepted", autobiographical_form: "27437", autobiographical_form_completion_date: nil, sima_level_id: "1", created_at: "2017-06-06 20:01:50", updated_at: "2017-06-06 20:22:50", autobiographical_form_comments: nil, on_hold: nil, comments: [{:comment=>"original_msg (1).txt", :user_name=>"bild_cloud@bild.org", :created_at=>2017-06-06 20:01:50 UTC}, {:comment=>"ok", :user_name=>"SIMA Admin", :created_at=>2017-06-06 20:22:05 UTC}], interviewer_id: nil, interviewer_start_date: nil, transcriber_start_date: nil, biographer_start_date: nil, reviewer_start_date: nil>
 ]

Sima有类似状态,我有三种状态为"待定,接受,拒绝"

题:

现在我想根据状态显示结果,用户将其作为params传递.所以结果应该是Sima的状态.如果params状态="已接受",则Sima列表将只具有"已接受"状态

Answer 1

通过这样做,您可以避免N + 1查询问题

User.includes(:sima).where(sima: {status: params[:status]},primary_partner_id: params[:account_id]).map(&:sima)

如果您正在使用联接 - >在map语句中,每次调用查询时都会优先使用includes,以获取更多信息

你可以参考这个链接

http://guides.rubyonrails.org/active_record_querying.html