如何限制用户添加的记录（评论）数量？

发布于 2024-10-29 04:35:44 字数 833 浏览 3 评论 0原文

我怎样才能将用户可以为某个场所撰写的评论数量限制为一条？

如果他们尝试对某个场地进行两次审查，我还希望收到闪现消息提示。

我不太确定应该在问题中包含哪些代码，但这是创建审核方法：

审核控制器

def create
  @review = current_user.reviews.create!(params[:review])
  @review.venue = @venue
  if @review.save
    flash[:notice] = 'Thank you for reviewing this venue!'
    respond_to do |format|
      format.html { redirect_to venue_path(@venue) }
      format.js
    end
  else
    render :action => :new
  end
end

感谢您的任何帮助，非常感谢！

编辑

我已将此辅助方法添加到场地控制器中：

  def reviewed?
    if current_user.reviews.for_venue(@venue).empty?
      true
    else
      false
    end
  end

并将我的表单包装在：

<% if reviewed? %>
  form
<% end %>

但这只是返回 VenuesController 的未定义方法“reviews”

原文

How can I go about restricting the number of reviews a user can write for a venue to just one?

I would also like a flash message prompt if they try to review a venue twice.

I'm not too sure what code I should to include in my question but heres the create review method:

Review controller

def create
  @review = current_user.reviews.create!(params[:review])
  @review.venue = @venue
  if @review.save
    flash[:notice] = 'Thank you for reviewing this venue!'
    respond_to do |format|
      format.html { redirect_to venue_path(@venue) }
      format.js
    end
  else
    render :action => :new
  end
end

Thanks for any help its much appreciated!

edit

I've added this helper method into the venues controller:

  def reviewed?
    if current_user.reviews.for_venue(@venue).empty?
      true
    else
      false
    end
  end

and wrapped my form in:

<% if reviewed? %>
  form
<% end %>

but this just returns undefined method `reviews' for VenuesController

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巷雨优美回忆 2024-11-05 04:35:44

如果您能够从一开始就阻止用户查看场地，那就更好了。在您看来（或创建一个助手），请检查该场地是否已被用户审查（有很多方法可以做到这一点）。如果是，请不要出示审核表。简单的。如果您非常 OC，那么您就需要检查控制器。

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灵芸 2024-11-05 04:35:44

也许您应该使用 before_validation 回调，以便您可以检查用户是否已经审核过场地。您可以在创建行中包含场地：

current_user.reviews.create!({:venue_id => @venue.id}.merge(params[:review]))

对于验证，请使用如下内容：

before_validation :check_if_already_reviewed

def check_if_already_reviewed
  if (check if already reviewed)
    return false
  else
    return true
  end
end

Maybe you should use a before_validation callback, so that you can check if the venue has been already reviewed by the user. You can include the venue in the create line:

current_user.reviews.create!({:venue_id => @venue.id}.merge(params[:review]))

And for the validation, use something like this:

before_validation :check_if_already_reviewed

def check_if_already_reviewed
  if (check if already reviewed)
    return false
  else
    return true
  end
end

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