[英]Ruby on Rails 4.2.3 flash notice/alert on redirect_to not showing in view
值得注意的是,这是我的第一个Rails应用程序。 我已经阅读了很多,但是我尝试过的所有建议仍然没有用。 简而言之,我正在使用gem 'devise', '~> 3.5.1'
和Rails Flash通知组件来通知用户,当他们试图在自己不拥有的模型中编辑记录时。 这是一个简单的“评论”应用程序,允许登录的用户提交评论,并且如果创建了评论,他们也可以编辑评论,但前提是必须创建评论。 这是到目前为止我得到的。
reviews_controller.rb
class ReviewsController < ApplicationController
before_action :set_review, only: [:show, :edit, :update, :destroy]
before_filter :authenticate_user!, except: [:index, :show]
# GET /reviews
# GET /reviews.json
def index
@reviews = Review.all
end
# GET /reviews/1
# GET /reviews/1.json
def show
end
# GET /reviews/new
def new
#@review = Review.new
@review = current_user.reviews.build
end
# GET /reviews/1/edit
def edit
@review = Review.find(params[:id])
if current_user.id == @review.user_id
# default action
else
#flash[:alert] = "You do not have permission to edit this Review."
#redirect_to @review
#flash.alert = "You do not have permission to edit this Review."
#redirect_to @review
redirect_to @review, alert: 'You do not have permission to edit this Review.'
#redirect_to @review, :flash => { :alert => 'You do not have permission to edit this Review.' }
end
end
# POST /reviews
# POST /reviews.json
def create
#@review = Review.new(review_params)
@review = current_user.reviews.build(review_params)
respond_to do |format|
if @review.save
format.html { redirect_to @review, notice: 'Review was successfully created.' }
format.json { render :show, status: :created, location: @review }
else
format.html { render :new }
format.json { render json: @review.errors, status: :unprocessable_entity }
end
end
end
# PATCH/PUT /reviews/1
# PATCH/PUT /reviews/1.json
def update
@review = Review.find(params[:id])
if current_user.id == @review.user_id
respond_to do |format|
if @review.update(review_params)
format.html { redirect_to @review, notice: 'Review was successfully updated.' }
format.json { render :show, status: :ok, location: @review }
else
format.html { render :edit }
format.json { render json: @review.errors, status: :unprocessable_entity }
end
end
else
redirect_to @review, notice: 'You do not have permission to edit this Review.'
end
end
# DELETE /reviews/1
# DELETE /reviews/1.json
def destroy
@review.destroy
respond_to do |format|
format.html { redirect_to reviews_url, notice: 'Review was successfully destroyed.' }
format.json { head :no_content }
end
end
private
# Use callbacks to share common setup or constraints between actions.
def set_review
@review = Review.find(params[:id])
end
# Never trust parameters from the scary internet, only allow the white list through.
def review_params
params.require(:review).permit(:title, :content)
end
end
如果您在上述文件中的def edit
下查看,则可以看到我已经尝试了一些方法来传递Flash通知。 无论尝试如何,都无法让它显示出来。 这是显示视图代码。
评论/ show.html.erb
<p id="notice"><%= notice %></p>
<p id="alert"><%= alert %></p>
<% flash.each do |name, msg| %>
<% content_tag(:div, msg, class: "alert alert-#{name}") %>
<% end %>
<p>
<strong>Title:</strong>
<%= @review.title %>
</p>
<p>
<strong>Content:</strong>
<%= @review.content %>
</p>
<%= link_to 'Edit', edit_review_path(@review) %> |
<%= link_to 'Back', reviews_path %>
它将以<p id="notice"><%= notice %></p>
或<p id="alert"><%= alert %></p>
代码显示在视图中,但不会出现在视图中flash.each
循环,这是我要解决的问题。 我想按照flash.each循环中的指示传递消息和消息类型。 据我所知,这是在视图中显示Flash消息的非常标准的方法。
如果您需要,这是我的Gemfile 。
source 'https://rubygems.org'
ruby '2.1.5'
# Bundle edge Rails instead: gem 'rails', github: 'rails/rails'
gem 'rails', '4.2.3'
# Use sqlite3 as the database for Active Record
gem 'sqlite3'
# Use SCSS for stylesheets
gem 'sass-rails', '~> 5.0'
# Use Uglifier as compressor for JavaScript assets
gem 'uglifier', '>= 1.3.0'
# Use CoffeeScript for .coffee assets and views
gem 'coffee-rails', '~> 4.1.0'
# See https://github.com/rails/execjs#readme for more supported runtimes
# gem 'therubyracer', platforms: :ruby
gem 'devise', '~> 3.5.1'
# Use jquery as the JavaScript library
gem 'jquery-rails'
# Turbolinks makes following links in your web application faster. Read more: https://github.com/rails/turbolinks
gem 'turbolinks'
# Build JSON APIs with ease. Read more: https://github.com/rails/jbuilder
gem 'jbuilder', '~> 2.0'
# bundle exec rake doc:rails generates the API under doc/api.
gem 'sdoc', '~> 0.4.0', group: :doc
# Use ActiveModel has_secure_password
# gem 'bcrypt', '~> 3.1.7'
# Use Unicorn as the app server
# gem 'unicorn'
# Use Capistrano for deployment
# gem 'capistrano-rails', group: :development
group :development, :test do
# Call 'byebug' anywhere in the code to stop execution and get a debugger console
gem 'byebug'
# Access an IRB console on exception pages or by using <%= console %> in views
gem 'web-console', '~> 2.0'
# Spring speeds up development by keeping your application running in the background. Read more: https://github.com/rails/spring
gem 'spring'
end
这里发生了什么? 我想念什么? 非常感谢!
content_tag
返回HTML标记,但不回显它。 您需要自己回显content_tag
的返回值:
<% flash.each do |name, msg| %>
<%= content_tag(:div, msg, class: "alert alert-#{name}") %>
<% end %>
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