当我尝试访问 users#login 页面时出现此错误。我的控制器是
class UsersController < ApplicationController
# GET /users
# GET /users.json
def login
@username = User.find_by_username(params[:username])
@password = params[:password]
if(@username.password == @password)
format.json { render json: @username, notice: "Login Successful!!" }
end
end
def index
@users = User.all
respond_to do |format|
format.html # index.html.erb
format.json { render json: @user }
end
end
# GET /users/1
# GET /users/1.json
def show
@user = User.find(params[:id])
respond_to do |format|
format.html # show.html.erb
format.json { render json: @user }
end
end
# GET /users/new
# GET /users/new.json
def new
@user = User.new
respond_to do |format|
format.html # new.html.erb
format.json { render json: @user }
end
end
# GET /users/1/edit
def edit
@user = User.find(params[:id])
end
# POST /users
# POST /users.json
def create
@user = User.new(params[:user])
respond_to do |format|
if @user.save
format.html { redirect_to @user, notice: 'User was successfully created.' }
format.json { render json: @user, status: :created, location: @user }
else
format.html { render action: "new" }
format.json { render json: @user.errors, status: :unprocessable_entity }
end
end
end
# PUT /users/1
# PUT /users/1.json
def update
@user = User.find(params[:id])
respond_to do |format|
if @user.update_attributes(params[:user])
format.html { redirect_to @user, notice: 'User was successfully updated.' }
format.json { head :no_content }
else
format.html { render action: "edit" }
format.json { render json: @user.errors, status: :unprocessable_entity }
end
end
end
# DELETE /users/1
# DELETE /users/1.json
def destroy
@user = User.find(params[:id])
@user.destroy
respond_to do |format|
format.html { redirect_to users_url }
format.json { head :no_content }
end
end
end
我进行了研究，人们遇到的问题是他们没有迁移“密码”列，或者密码实际上是“密码”，但是当我进入 Rails 控制台并运行时
user = User.new
=> #<User id: nil, name: nil, email: nil, username: nil, created_at: nil, updated_at: nil, password: nil>
所以我想这不是我的问题。