yii2源码学习笔记(十三），yii2源码学习笔记
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2022-05-27 10:44:07
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yii2源码学习笔记(十三），yii2源码学习笔记
模型类DynamicModel主要用于实现模型内的数据验证yii2\base\DynamicModel.php
1 php 2 /** 3 * @link http://www.yiiframework.com/ 4 * @copyright Copyright (c) 2008 Yii Software LLC 5 * @license http://www.yiiframework.com/license/ 6 */ 7 namespace yii\base; 8 9 use yii\validators\Validator; 10 11 /** 12 * DynamicModel is a model class primarily used to support ad hoc data validation. 13 * DynamicModel是一种主要用于支持ad hoc数据验证模型类 14 * The typical usage of DynamicModel is as follows, 15 * 16 * ```php 17 * public function actionSearch($name, $email) 18 * { 19 * $model = DynamicModel::validateData(compact('name', 'email'), [ 20 * [['name', 'email'], 'string', 'max' => 128], 21 * ['email', 'email'], 22 * ]); 23 * if ($model->hasErrors()) { 24 * // validation fails 25 * } else { 26 * // validation succeeds 27 * } 28 * } 29 * ``` 30 * 31 * The above example shows how to validate `$name` and `$email` with the help of DynamicModel. 32 * 上面的例子演示了如何用DynamicModel验证用户名`$name`和邮箱`$email` 33 * The [[validateData()]] method creates an instance of DynamicModel, defines the attributes 34 * using the given data (`name` and `email` in this example), and then calls [[Model::validate()]]. 35 * validateData() 方法会创建一个 DynamicModel 的实例对象。通过给定数据定义模型特性，之后调用Model::validate() 方法。 36 * You can check the validation result by [[hasErrors()]], like you do with a normal model. 37 * You may also access the dynamic attributes defined through the model instance, e.g., 38 * 可以通过[[hasErrors()]]方法获取验证结果 39 * `$model->name` and `$model->email`. 40 * 41 * Alternatively, you may use the following more "classic" syntax to perform ad-hoc data validation: 42 * 除此之外，你也可以用如下的更加“classic（传统）”的语法来执行临时数据验 43 * ```php 44 * $model = new DynamicModel(compact('name', 'email')); 45 * $model->addRule(['name', 'email'], 'string', ['max' => 128]) 46 * ->addRule('email', 'email') 47 * ->validate(); 48 * ``` 49 * 50 * DynamicModel implements the above ad-hoc data validation feature by supporting the so-called 51 * "dynamic attributes". It basically allows an attribute to be defined dynamically through its constructor 52 * or [[defineAttribute()]]. 53 * 实现了上述特殊数据模型验证功能支持的“动态属性”。允许通过它的构造函数或 [[defineAttribute()]]来定义一个属性 54 * @author Qiang Xue55 * @since 2.0 56 */ 57 class DynamicModel extends Model 58 { 59 private $_attributes = [];//动态模型内动态属性 60 61 62 /** 63 * Constructors.构造函数，用于将传入的属性赋值给_attributes，便于使用 64 * @param array $attributes the dynamic attributes (name-value pairs, or names) being defined被定义的动态属性 65 * @param array $config the configuration array to be applied to this object.用于该对象的配置数组。 66 */ 67 public function __construct(array $attributes = [], $config = []) 68 { 69 foreach ($attributes as $name => $value) {//遍历传入的属性 70 if (is_integer($name)) {//如果是整型，说明只传入了属性名，将属性名写入_attributes 71 $this->_attributes[$value] = null; 72 } else { 73 $this->_attributes[$name] = $value;//按键值对的形式写入 74 } 75 } 76 parent::__construct($config);//调用父类的配置 77 } 78 79 /** 80 * @inheritdoc 重写__get方法，从_attributes中取值 81 */ 82 public function __get($name) 83 { 84 if (array_key_exists($name, $this->_attributes)) { 85 //如果传入的$name在数组_attributes中存在，则从_attributes中取值 86 return $this->_attributes[$name]; 87 } else {//否则调用父类的__get方法取属性值 88 return parent::__get($name); 89 } 90 } 91 92 /** 93 * @inheritdoc 重写__set方法，给_attributes设置值 94 */ 95 public function __set($name, $value) 96 { 97 if (array_key_exists($name, $this->_attributes)) { 98 //如果传入的$name在数组_attributes中存在，则将动态属性$name的值设置为$value 99 $this->_attributes[$name] = $value; 100 } else { 101 parent::__set($name, $value);//调用父类的__set方法设置属性值 102 } 103 } 104 105 /** 106 * @inheritdoc 同上 重写__isset方法，判断_attributes中是否设置$name值 107 */ 108 public function __isset($name) 109 { 110 if (array_key_exists($name, $this->_attributes)) { 111 return isset($this->_attributes[$name]); 112 } else { 113 return parent::__isset($name); 114 } 115 } 116 117 /** 118 * @inheritdoc 同上，重写__unset方法，删除_attributes中的$name属性值 119 */ 120 public function __unset($name) 121 { 122 if (array_key_exists($name, $this->_attributes)) { 123 unset($this->_attributes[$name]); 124 } else { 125 parent::__unset($name); 126 } 127 } 128 129 /** 130 * Defines an attribute. 定义动态属性的方法 131 * @param string $name the attribute name 属性名 132 * @param mixed $value the attribute value 属性值 133 */ 134 public function defineAttribute($name, $value = null) 135 { 136 $this->_attributes[$name] = $value; 137 } 138 139 /** 140 * Undefines an attribute. 用于删除动态属性的方法 141 * @param string $name the attribute name 属性名 142 */ 143 public function undefineAttribute($name) 144 { 145 unset($this->_attributes[$name]); 146 } 147 148 /** 149 * Adds a validation rule to this model. 添加验证规则 150 * You can also directly manipulate [[validators]] to add or remove validation rules. 151 * This method provides a shortcut. 152 * 可以直接调用[[validators]]来添加或者删除验证规则，本方法提供了一个短方法 153 * @param string|array $attributes the attribute(s) to be validated by the rule 进行验证的属性 154 * @param mixed $validator the validator for the rule.This can be a built-in validator name, 155 * a method name of the model class, an anonymous function, or a validator class name. 156 * 规则的验证。这是一个内置验证器的名字， 一个模型类的方法名，一个匿名函数或一个验证器类的名称。 157 * @param array $options the options (name-value pairs) to be applied to the validator 158 * (name-value)被应用到验证器 159 * @return static the model itself 模型本身 160 */ 161 public function addRule($attributes, $validator, $options = []) 162 { 163 $validators = $this->getValidators();//所有的验证规则对象 164 //生成Validator对象，并且插入 $validators中 165 $validators->append(Validator::createValidator($validator, $this, (array) $attributes, $options)); 166 167 return $this; 168 } 169 170 /** 171 * Validates the given data with the specified validation rules.通过指定的规则验证给定的数据 172 * This method will create a DynamicModel instance, populate it with the data to be validated, 173 * create the specified validation rules, and then validate the data using these rules. 174 * @param array $data the data (name-value pairs) to be validated 175 * @param array $rules the validation rules. Please refer to [[Model::rules()]] on the format of this parameter. 176 * @return static the model instance that contains the data being validated 177 * @throws InvalidConfigException if a validation rule is not specified correctly. 178 */ 179 public static function validateData(array $data, $rules = []) 180 { 181 /* @var $model DynamicModel */ 182 $model = new static($data);//实例化调用类，将$data赋值给_attributes 183 if (!empty($rules)) { 184 $validators = $model->getValidators();//获取所有定义的验证规则 185 foreach ($rules as $rule) { 186 if ($rule instanceof Validator) { 187 $validators->append($rule);//如果$rule是Validator的实例，则添加到$validators中 188 } elseif (is_array($rule) && isset($rule[0], $rule[1])) { // attributes, validator type 189 //如果$rule是数组，则判断动态属性和验证类型是否存在，创建Validator对象，添加到$validators中 190 $validator = Validator::createValidator($rule[1], $model, (array) $rule[0], array_slice($rule, 2)); 191 $validators->append($validator); 192 } else {//抛出异常 193 throw new InvalidConfigException('Invalid validation rule: a rule must specify both attribute names and validator type.'); 194 } 195 } 196 } 197 198 $model->validate();//执行验证 199 200 return $model; 201 } 202 203 /** 204 * @inheritdoc 返回所有的动态属性 205 */ 206 public function attributes() 207 { 208 return array_keys($this->_attributes); 209 } 210 }