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我有一個論壇,用戶可以在其中查看未讀帖子的列表。我這樣做的方法是使用一看,用戶和Post模型:創建模型時包含數組
class Look < ActiveRecord::Base
belongs_to :post
belongs_to :user
end
class User < ActiveRecord::Base
has_many :posts, through: :looks
has_many :looks
end
class Post < ActiveRecord::Base
belongs_to :user
has_many :looks
has_many :users, through: :looks
end
所以這個工作的方式是,有所有帖子ID的用戶查看列表。它是通過'show'方法創建的:
def show
if current_user
viewer = current_user
view_ids = viewer.posts.pluck(:id).uniq
not_viewed = Post.where("id not in (?)", view_ids)
not_viewed_ids = not_viewed.pluck(:id)
unless Post.find(params[:id]).in?(not_viewed_ids)
Look.create(user: current_user, post: @post, viewstamp: Time.now)
end
end
end
這一切都工作得很好。問題是我想創建一個Look for all posts,這樣我就可以將所有標記爲已讀。該行鍼對當前崗位創建外觀正常工作:
unless Post.find(params[:id]).in?(not_viewed_ids)
Look.create(user: current_user, post: @post, viewstamp: Time.now)
end
...但我怎麼做一個,致力於爲每一個崗位一看那?就像這樣:
Look.create(user: current_user, post: [NEED ARRAY OF POSTS HERE], viewstamp: Time.now)
我想這樣做的原因是這樣用戶就可以將所有帖子標記爲已讀。