軌道4的has_many通過：篩選記錄來自關聯模型

Question

模型關聯

class User < ActiveRecord::Base 
    has_many :boards 
    has_many :cards, through: :boards 
end 

class Board < ActiveRecord::Base 
    belongs_to :user 
    has_many :cards 
end 

class Card < ActiveRecord::Base 
belongs_to :board 
end 

檢索記錄

卡和主板模型已經「關閉」稱爲屬性。 我想在檢索屬於current_user的所有卡片時過濾掉「關閉」等於真的卡片和卡片。

即
如果board.closed == true，此板及其所有相關的卡都被過濾掉
如果card.closed == true，則此個人卡被過濾掉

這並未「T工作，但顯示了我想要做的事：

current_user.cards.where(card.closed == false, card.board.closed == false) 

Answer 1

Card 
    .joins(:board) 
    .where(
    cards: { closed: false }, 
    boards: { user_id: current_user.id, closed: false } 
) 

或者，如果你堅持從current_user開始：

current_user 
    .cards 
    .joins(:board) 
    .where(cards: { closed: false }, boards: { closed: false }) 

Answer 2

我能濾除封閉卡屬於封閉板與此卡：

current_user.cards.to_a.delete_if { |card| card.board.closed == true || card.closed == true }