Phalcon - 脚手架应用程序
脚手架通常是指一种代码生成,我们将其指向 Web 应用程序数据库,从而创建一个基本的 CRUD(创建、读取、更新、删除)应用程序。
在设计 CRUD 应用程序之前,根据应用程序的需求设计数据库表非常重要。
步骤 1 − 创建一个包含所有 CRUD 操作的脚手架应用程序。
命令:phalcon scaffold <table-name>
Phalcon 的脚手架生成器一旦执行,将创建下表中描述的文件和文件夹。
步骤 2 − 创建索引页(phtml 和 volt 的组合)。
要包含在用户文件夹中的 index.phtml 中的代码。
<?php use Phalcon\Tag as Tag ?> <!DOCTYPE html> <html> <head> <meta charset = "utf-8"> <title>Blog Tutorial</title> <link rel = "stylesheet" type = "text/css" href = "http://netdna.bootstrapcdn.com/twitter-bootstrap/2.2.1/css/bootstrapcombined.min.css"/> <meta name = "viewport" content = "width = device-width, initial-scale = 1.0"> </head> <body> <div class = "navbar navbar-fixed-top"> <div class = "navbar-inner"> <div class = "container"> <a class = "btn btn-navbar" data-toggle = "collapse" datatarget = ".nav-collapse"> <span class = "icon-bar"></span> <span class = "icon-bar"></span> <span class = "icon-bar"></span> </a> <a class = "brand" href = "#">Blog Collection</a> <div class = "nav-collapse"> <ul class = "nav pull-left"> <li> <?php echo Phalcon\Tag::linkTo('index', 'Home Page') ?> </li> <?php if ($this->session->has('auth')) { ?> <li> <?php echo Phalcon\Tag::linkTo('posts/index', '+Posts') ?> </li> <li> <?php echo Phalcon\Tag::linkTo('categories/index', '+Categories') ?> </li> <li> <?php echo Phalcon\Tag::linkTo('users/logout', 'Log out') ?> </li> <?php } else { ?> <li> <?php echo Phalcon\Tag::linkTo('users/index', 'Log in') ?> </li> <?php } ?> </ul> </div> </div> </div> </div> <?php echo $this->getContent() ?> <script src = "http://netdna.bootstrapcdn.com/twitterbootstrap/2.2.1/js/bootstrap.min.js"></script> </body> </html>
默认文件 index.volt 将包含以下代码。
<?php echo $this->getContent() ?> <div align = "center"> <h1>Welcome!</h1> <p>Welcome to the blog collection of Phalcon</p> </div>
成功执行上述代码将产生以下输出。
步骤 3 − 使用相应的模型进行更改。
Users.php
<?php class Users extends \Phalcon\Mvc\Model { /** * @var integer * */ public $id; /** * @var string * */ public $login; /** * @var string * */ public $password; /** * Initializer method for model. */ public function initialize() { $this->hasMany("id", "Posts", "users_id"); } }
名为'initialize'的函数有助于在 Posts 表中实现 id 和 users_id 之间的关系,这意味着每个唯一用户在表中都有许多相关的帖子。
Posts.php
<?php class Posts extends \Phalcon\Mvc\Model { /** * @var integer * */ public $id; /** * @var string * */ public $title; /** * @var string * */ public $slug; /** * @var string * */ public $content; /** * @var string * */ public $created; /** * @var integer * */ public $users_id; /** * @var integer * */ public $categories_id; /** * Initializer method for model. */ public function initialize() { $this->belongsTo("users_id", "Users", "id"); $this->belongsTo("categories_id", "Categories", "id"); } }
函数'initialize'包含关系约束,其中提到了与表的外键和主键关系。
users_id 指的是"Users"表中的 id。
categories_id 指的是"Categories"表中的 id。
Categories.php
<?php class Categories extends \Phalcon\Mvc\Model { /** * @var integer * */ public $id; /** * @var string * */ public $name; /** * @var string * */ public $slug; /** * Initializer method for model. */ public function initialize() { $this->hasMany("id", "Posts", "categories_id"); } }
与用户模型类似,'initialize'函数指定它包含给定帖子的多个categories_id。
创建视图
以下是 Blog-tutorial-master 项目的完整结构。
用户成功登录后显示主页的关联视图是"index.phtml"。
<?php use Phalcon\Tag as Tag ?> <!DOCTYPE html> <html> <head> <meta charset = "utf-8"> <title>Blog Tutorial</title> <link rel = "stylesheet" type = "text/css" href = "http://netdna.bootstrapcdn.com/twitter-bootstrap/2.2.1/css/bootstrapcombined.min.css"/> <meta name = "viewport" content = "width = device-width, initial-scale = 1.0"> </head> <body> <div class = "navbar navbar-fixed-top"> <div class = "navbar-inner"> <div class = "container"> <a class = "btn btn-navbar" data-toggle = "collapse" datatarget = ".nav-collapse"> <span class = "icon-bar"></span> <span class = "icon-bar"></span> <span class = "icon-bar"></span> </a> <a class = "brand" href = "#">Blog Collection</a> <div class = "nav-collapse"> <ul class = "nav pull-left"> <li> <?php echo Phalcon\Tag::linkTo('index', 'Home Page') ?> </li> <?php if ($this->session->has('auth')) { ?> <li> <?php echo Phalcon\Tag::linkTo('posts/index', '+Posts') ?> </li> <li> <?php echo Phalcon\Tag::linkTo('categories/index', '+Categories') ?> </li> <li> <?php echo Phalcon\Tag::linkTo('users/logout', 'Log out') ?> </li> <?php } else { ?> <li> <?php echo Phalcon\Tag::linkTo('users/index', 'Log in') ?> </li> <?php } ?> </ul> </div> </div> </div> </div> <?php echo $this->getContent() ?> <script src = "http://netdna.bootstrapcdn.com/twitterbootstrap/2.2.1/js/bootstrap.min.js"></script> </body> </html>