我正在努力为我的显示选项添加一个最受欢迎的选项。我不确定这个等式是否是我想要使用的,但我认为数学是我问题中不敬的部分,但可以免费提出改进建议。
我的问题是“@cards.pop = (@W + @R) + ((1 - @W) * @R0)”我收到“nil:NilClass 的未定义方法 `pop='”错误代码。我可以不或者如何向字符串数组添加一个值,然后将其用作排序选项,例如其他“视图”选项有吗?
也可以随意挑选你看到的任何其他东西。如果我从未被告知,我将永远不会学习。
提前感谢大家的帮助,伊恩
if params[:view].present?
if params[:view] == 'new' #Sort newest to oldest
@cards = Card.order('created_at DESC').page(params[:page])
elsif params[:view] == 'old' #Sort oldest to newest
@cards = Card.order('created_at ASC').page(params[:page])
elsif params[:view] == 'talk' #Sort most talked about
@cards = Card.order('comments_count DESC').page(params[:page])
elsif params[:view] == 'pop' #Sort most popular
# http://math.stackexchange.com/questions/41459/how-can-i-calculate-most-popular-more-accurately
@cards = Card.all
@R0 = Card.average("score")
@nMax = Card.maximum("votes_count")
@cards.each do |card|
@R = card.score
@n = card.votes_count
@W = @n / @nMax
@cards.pop = (@W + @R) + ((1 - @W) * @R0)
end
# Need to add a Cards.order line - Not sure how to go about this.
else
@cards = Card.order('score DESC').page(params[:page])
end
else
@cards = Card.order('score DESC').page(params[:page])
end
牌桌
=> Card(id: integer, user_id: integer, event: text, created_at: datetime, updated_at: datetime, score: integer, comments_count: integer, votes_count: integer)
投票表
=> Vote(id: integer, user_id: integer, card_id: integer, up: boolean, created_at: datetime, updated_at: datetime)