保存在一個數組項活動記錄

Question

我有一個數組，看起來像這樣：

[{"id"=>"2", "reply"=>"ok"}, {"id"=>"3", "reply"=>"ok"}, {"id"=>"4", "reply"=>"ok"}, {"id"=>"5"}, {"id"=>"6", "reply"=>"2"}] 

現在我想將它保存這樣的：

current_user.answers.transaction do 

    success = params[:answers].map(&:save) 
    unless sucess.all? 
    errored = params[:answers].select { |b| !b.errors.blank? } 
    raise ActiveRecord::Rollback 
    end 

end 

但結果

undefined method `save' for {"id"=>"2", "reply"=>"ok"}:ActionController::Parameters 

確實有人知道我可以保存每件物品嗎？

class Answer < ActiveRecord::Base 
    belongs_to :user 
    belongs_to :question 
    has_many :comments 

    validates :reply, :question_id, :week_number, presence: true 


end 

Answer 1

啊，就它發送一個塊...所以你可以嘗試：

current_user.answers.transaction do 
    success = params[:answers].map do |hash| 
    object = Model.new(hash) 
    object.save 
    end 
    unless success.all? 
    errored = params[:answers].select { |b| !b.errors.blank? } 
    raise ActiveRecord::Rollback 
    end 
end 

要知道，Model需要在模型的你試圖用實例化對象的名稱。

但是，這只是如果你正在做新的對象，一般不會是你的情況下所設置的id屬性已經

current_user.answers.transaction do 
    success = params[:answers].map do |hash| 
    object = Model.find(hash["id"]) 
    object.update_attributes(hash) 
    end 
    unless success.all? 
    errored = params[:answers].select { |b| !b.errors.blank? } 
    raise ActiveRecord::Rollback 
    end 
end 

希望這有助於