我正在尝试使用 Rails 4 制作应用程序。
我使用了 generate scaffold 命令来设置文章控制器。
它目前看起来像这样:
class ArticlesController < ApplicationController
before_action :set_article, only: [:show, :edit, :update, :destroy]
before_action :authenticate_user!, except: [:index, :show, :search]
respond_to :html, :json
# GET /articles
# GET /articles.json
def index
query = params[:query].presence || "*"
@articles = Article.search(query)
end
# def index
# if params[:query].present?
# @books = Book.search(params[:query], page: params[:page])
# else
# @books = Book.all.page params[:page]
# end
# end
# GET /articles/1
# GET /articles/1.json
def show
end
# GET /articles/new
def new
@article = Article.new
end
# GET /articles/1/edit
def edit
end
# POST /articles
# POST /articles.json
def create
# before_action :authenticate_user!
# authorize @article
@article = Article.new(article_params)
respond_to do |format|
if @article.save
format.html { redirect_to(@article) }
format.json { render :show, status: :created, location: @article }
else
format.html { render :new }
format.json { render json: @article.errors, status: :unprocessable_entity }
end
end
end
def search
if params[:search].present?
@articless = Article.search(params[:search])
else
@articles = Articles.all
end
end
# PATCH/PUT /articles/1
# PATCH/PUT /articles/1.json
def update
# before_action :authenticate_user!
authorize @article
respond_to do |format|
if @article.update(article_params)
format.json { render :show, status: :ok, location: @article }
else
format.html { render :edit }
format.json { render json: @article.errors, status: :unprocessable_entity }
end
end
end
# DELETE /articles/1
# DELETE /articles/1.json
def destroy
before_action :authenticate_user!
authorize @article
@article.destroy
respond_to do |format|
format.json { head :no_content }
end
end
private
# Use callbacks to share common setup or constraints between actions.
def set_article
@article = Article.find(params[:id])
end
# Never trust parameters from the scary internet, only allow the white list through.
def article_params
params[:article].permit(:user_id, :body, :title, :image,
comment_attributes: [:opinion])
end
end
我将此行添加到文件的顶部:
respond_to :html, :json
我发现这篇文章解释了为什么需要这样:
http://www.justinweiss.com/articles/respond-to-without-all-the-pain/
但是,当我保存更改并尝试更新文件中的条目时,我收到此错误:
ActionController::UnknownFormat in ArticlesController#update
错误指向我的更新操作中的 respond_to 行:
def update
# before_action :authenticate_user!
authorize @article
respond_to do |format|
if @article.update(article_params)
format.json { render :show, status: :ok, location: @article }
else
format.html { render :edit }
format.json { render json: @article.errors, status: :unprocessable_entity }
end
end
end
是否需要更多的东西才能让它工作?