ruby-on-rails - Rails - before_filter 未定义局部变量

Question

我有这个表单，用户可以在其中输入评论。用户必须在 Facebook 上签名才能保存评论。我使用 before_filter 检查用户是否登录。

但我得到这个错误:undefined local variable or method signed_in_user'.

另一件事是，我如何使用 Facebook 登录用户并保存其评论？不会丢失并让用户再次输入相同的评论。

审核表:

<%= form_for [@school, Review.new] do |f| %>
 <%= f.text_area :content %>
    <% if current_user %>
      <%= f.submit 'Save my review', :class => "btn" %>
    <% else %>
      <%= f.submit 'Save my review and sign me into facebook', :class => "btn" %>
    <% end %>
<%end %>

评论 Controller

class ReviewsController < ApplicationController
    before_filter :signed_in_user, only: [:create, :destroy]

    def create
        @school = School.find(params[:school_id])
        @review = @school.reviews.new(params[:review])

        @review.user_id = current_user.id

        if @review.save
            redirect_to @review.school, notice: "Review has been created."
        else
            render :new
        end
    end

    def new
        @school = School.find_by_id(params[:school_id])
        @review = Review.new
    end
end

ReviewsHelper

module ReviewsHelper
    def signed_in?
        !current_user.nil?
    end

    def signed_in_user
        unless signed_in?   
            redirect_to "/auth/facebook"
        end
    end
end

我正在使用 omniauth 对来自 facebook 的用户进行身份验证。

Answer 1

在 Controller 中包含您的ReviewsHelper:

class ReviewsController < ApplicationController
    include ReviewsHelper #or helper :reviews
    before_filter :signed_in_user, only: [:create, :destroy]

    def create
        @school = School.find(params[:school_id])
        @review = @school.reviews.new(params[:review])

        @review.user_id = current_user.id

        if @review.save
            redirect_to @review.school, notice: "Review has been created."
        else
            render :new
        end
    end

    def new
        @school = School.find_by_id(params[:school_id])
        @review = Review.new
    end
end