rails5 后台入门（api mode）

1. Installation (Centos为例)

1.1安装rvm (http://rvm.io/)

gpg2 --recv-keys 409B6B1796C275462A1703113804BB82D39DC0E3 7D2BAF1CF37B13E2069D6956105BD0E739499BDB

\curl -sSL https://get.rvm.io | bash -s stable

1.2安装ruby

rvm install 2.5.3

yum install ruby-dev

1.3 安装rails

gem install rails

2. Setup

2.1 初始化项目

rails new ProjectName --api ( --skip-bundle ) 跳过bundle安装

gemfile配置

gem 'mysql2' # 如果是pg安装'pg'

gem 'rack-cors'

安装: bundle install

2.2 配置数据库

/config/database.yml

default: &default

  adapter: mysql2

  pool:

  username: root

  password: pwdpwdpwd

  host: localhost

  charset: utf8

  timeout: 

development:

  <<: *default

  database: databaseName

test:

  <<: *default

  database: databaseName2

production:

  <<: *default

  database: databaseName3

2.3 配置cors

/config/application.rb

config.middleware.insert_before 0, Rack::Cors do

      allow do

        origins 'http://localhost:3000'

        resource '*', :headers => :any, :methods => [:get, :post, :options,:put,:delete], :credentials=> true

      end

    end

2.4 配置session和cookie

！ api模式默认不带

/config/application.rb

config.middleware.use ActionDispatch::Cookies

config.middleware.use ActionDispatch::Session::CookieStore

/app/controllers/application_controller.rb

before_action :set_csrf_cookie

include ActionController::Cookies

include ActionController::RequestForgeryProtection

# 放最后

private

def set_csrf_cookie

   cookies["CSRF-TOKEN"] = form_authenticity_token

end

3. 简单的用户认证和登录

3.1 创建模型

rails g model User username:string email:string password_digest:string

3.2 配置模型验证

/app/models/user.rb

validates :password, length: {in: 8..20}

before_save {self.email = email.downcase}

validates :username, presence:true, length: {in: 6..20}

validates :email, presence:true, length: {in: 5..255}, format: {with: /\A[\w+\-.]+@[a-z\d\-.]+\.[a-z]+\z/i}, uniqueness:{case_sensitive: false}

has_secure_password

3.3 controller

rails g controller User signin signup

/app/contorllers/application_controller.rb

helper_method :current_user

def current_user

       @current_user ||= session[:user_id] && User.find(session[:user_id])

end

def require_user

       render json: {code:-1,info:'login_required'} unless current_user

end

/app/controllers/user_controller.rb

  def signup

      @user = User.new(user_params)

      if !@user.valid?

          code = 0

          data = @user.errors.messages

          info = 'bad_for_reasons'

      else

          if @user.save

              code = 1

              info = 'success'

              data = {userId:@user.id,username:@user.username}

          else

             code = 0

             data = ''

             info = 'reason_unknown'

         end

      end

      render json: {code:code, info:info,data:data}

  end

  def signin

      @user = User.find_by_email(params[:email])

      if @user && @user.authenticate(params[:password])

          session[:user_id] = @user.id

          render json: {code:1, info:'success',data:{userId:@user.id,username:@user.username}}

      else

          render json: {code:0,info:'bad'}

      end

  end

 def destroy # 注销

      session[:user_id] = nil

      render json: {code:1,info:'success'}

 end

private

def user_params

    params.require(:user).permit(:username,:email,:password)

end

3.4 配置路由

格式： get 'url', to: 'controller#method'

3.5 启动

rails s

4. 部署

rails s -e production

可能会提示缺少SECRET_KEY_BASE

RAILS_ENV=production rake secret

/etc/profile

export SECRET_KEY_BASE=刚才生成的密钥

source /etc/profile

更多查看

https://www.cnblogs.com/yxi-liu/p/10331310.html

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