yii2 source code study notes (13), yii2 source code study notes_PHP tutorial

yii2 source code study notes (13), yii2 source code study notes

The model class DynamicModel is mainly used to implement data verification within the model yii2baseDynamicModel.php

<span>  1</span> <?<span>php
</span><span>  2</span> <span>/*</span><span>*
</span><span>  3</span> <span> * @link </span><span>http://www.yiiframework.com/</span>
<span>  4</span> <span> * @copyright Copyright (c) 2008 Yii Software LLC
</span><span>  5</span> <span> * @license </span><span>http://www.yiiframework.com/license/</span>
<span>  6</span>  <span>*/</span>
<span>  7</span> <span>namespace</span> yii\<span>base</span><span>;
</span><span>  8</span> 
<span>  9</span> <span>use yii\validators\Validator;
</span><span> 10</span> 
<span> 11</span> <span>/*</span><span>*
</span><span> 12</span> <span> * DynamicModel is a model class primarily used to support ad hoc data validation.
</span><span> 13</span> <span> * DynamicModel是一种主要用于支持ad hoc数据验证模型类
</span><span> 14</span> <span> * The typical usage of DynamicModel is as follows,
</span><span> 15</span> <span> *
</span><span> 16</span> <span> * ```php
</span><span> 17</span> <span> * public function actionSearch($name, $email)
</span><span> 18</span> <span> * {
</span><span> 19</span> <span> *     $model = DynamicModel::validateData(compact('name', 'email'), [
</span><span> 20</span> <span> *         [['name', 'email'], 'string', 'max' => 128],
</span><span> 21</span> <span> *         ['email', 'email'],
</span><span> 22</span> <span> *     ]);
</span><span> 23</span> <span> *     if ($model->hasErrors()) {
</span><span> 24</span> <span> *         // validation fails
</span><span> 25</span> <span> *     } else {
</span><span> 26</span> <span> *         // validation succeeds
</span><span> 27</span> <span> *     }
</span><span> 28</span> <span> * }
</span><span> 29</span> <span> * ```
</span><span> 30</span> <span> *
</span><span> 31</span> <span> * The above example shows how to validate `$name` and `$email` with the help of DynamicModel.
</span><span> 32</span> <span> * 上面的例子演示了如何用DynamicModel验证用户名`$name`和邮箱`$email`
</span><span> 33</span> <span> * The [[validateData()]] method creates an instance of DynamicModel, defines the attributes
</span><span> 34</span> <span> * using the given data (`name` and `email` in this example), and then calls [[Model::validate()]].
</span><span> 35</span> <span> * 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。
</span><span> 36</span> <span> * You can check the validation result by [[hasErrors()]], like you do with a normal model.
</span><span> 37</span> <span> * You may also access the dynamic attributes defined through the model instance, e.g.,
</span><span> 38</span> <span> * 可以通过[[hasErrors()]]方法获取验证结果
</span><span> 39</span> <span> * `$model->name` and `$model->email`.
</span><span> 40</span> <span> *
</span><span> 41</span> <span> * Alternatively, you may use the following more "classic" syntax to perform ad-hoc data validation:
</span><span> 42</span> <span> *  除此之外，你也可以用如下的更加&ldquo;classic（传统）&rdquo;的语法来执行临时数据验
</span><span> 43</span> <span> * ```php
</span><span> 44</span> <span> * $model = new DynamicModel(compact('name', 'email'));
</span><span> 45</span> <span> * $model->addRule(['name', 'email'], 'string', ['max' => 128])
</span><span> 46</span> <span> *     ->addRule('email', 'email')
</span><span> 47</span> <span> *     ->validate();
</span><span> 48</span> <span> * ```
</span><span> 49</span> <span> *
</span><span> 50</span> <span> * DynamicModel implements the above ad-hoc data validation feature by supporting the so-called
</span><span> 51</span> <span> * "dynamic attributes". It basically allows an attribute to be defined dynamically through its constructor
</span><span> 52</span> <span> * or [[defineAttribute()]].
</span><span> 53</span> <span> * 实现了上述特殊数据模型验证功能支持的&ldquo;动态属性&rdquo;。允许通过它的构造函数或 [[defineAttribute()]]来定义一个属性
</span><span> 54</span> <span> * @author Qiang Xue <qiang.xue@gmail.com>
</span><span> 55</span> <span> * @since 2.0
</span><span> 56</span>  <span>*/</span>
<span> 57</span> <span>class</span><span> DynamicModel extends Model
</span><span> 58</span> <span>{
</span><span> 59</span>     <span>private</span> $_attributes = [];<span>//</span><span>动态模型内动态属性</span>
<span> 60</span> 
<span> 61</span> 
<span> 62</span>     <span>/*</span><span>*
</span><span> 63</span> <span>     * Constructors.构造函数，用于将传入的属性赋值给_attributes，便于使用
</span><span> 64</span> <span>     * @param array $attributes the dynamic attributes (name-value pairs, or names) being defined被定义的动态属性
</span><span> 65</span> <span>     * @param array $config the configuration array to be applied to this object.用于该对象的配置数组。
</span><span> 66</span>      <span>*/</span>
<span> 67</span>     <span>public</span> function __construct(array $attributes = [], $config =<span> [])
</span><span> 68</span> <span>    {
</span><span> 69</span>         <span>foreach</span> ($attributes <span>as</span> $name => $value) {<span>//</span><span>遍历传入的属性</span>
<span> 70</span>             <span>if</span> (is_integer($name)) {<span>//</span><span>如果是整型，说明只传入了属性名，将属性名写入_attributes</span>
<span> 71</span>                 $<span>this</span>->_attributes[$value] = <span>null</span><span>;
</span><span> 72</span>             } <span>else</span><span> {
</span><span> 73</span>                 $<span>this</span>->_attributes[$name] = $value;<span>//</span><span>按键值对的形式写入</span>
<span> 74</span> <span>            }
</span><span> 75</span> <span>        }
</span><span> 76</span>         parent::__construct($config);<span>//</span><span>调用父类的配置</span>
<span> 77</span> <span>    }
</span><span> 78</span> 
<span> 79</span>     <span>/*</span><span>*
</span><span> 80</span> <span>     * @inheritdoc 重写__get方法，从_attributes中取值
</span><span> 81</span>      <span>*/</span>
<span> 82</span>     <span>public</span><span> function __get($name)
</span><span> 83</span> <span>    {
</span><span> 84</span>         <span>if</span> (array_key_exists($name, $<span>this</span>-><span>_attributes)) {
</span><span> 85</span>             <span>//</span><span>如果传入的$name在数组_attributes中存在，则从_attributes中取值</span>
<span> 86</span>             <span>return</span> $<span>this</span>-><span>_attributes[$name];
</span><span> 87</span>         } <span>else</span> {<span>//</span><span>否则调用父类的__get方法取属性值</span>
<span> 88</span>             <span>return</span><span> parent::__get($name);
</span><span> 89</span> <span>        }
</span><span> 90</span> <span>    }
</span><span> 91</span> 
<span> 92</span>     <span>/*</span><span>*
</span><span> 93</span> <span>     * @inheritdoc 重写__set方法，给_attributes设置值
</span><span> 94</span>      <span>*/</span>
<span> 95</span>     <span>public</span><span> function __set($name, $value)
</span><span> 96</span> <span>    {
</span><span> 97</span>         <span>if</span> (array_key_exists($name, $<span>this</span>-><span>_attributes)) {
</span><span> 98</span>             <span>//</span><span>如果传入的$name在数组_attributes中存在，则将动态属性$name的值设置为$value</span>
<span> 99</span>             $<span>this</span>->_attributes[$name] =<span> $value;
</span><span>100</span>         } <span>else</span><span> {
</span><span>101</span>             parent::__set($name, $value);<span>//</span><span>调用父类的__set方法设置属性值</span>
<span>102</span> <span>        }
</span><span>103</span> <span>    }
</span><span>104</span> 
<span>105</span>     <span>/*</span><span>*
</span><span>106</span> <span>     * @inheritdoc 同上 重写__isset方法，判断_attributes中是否设置$name值
</span><span>107</span>      <span>*/</span>
<span>108</span>     <span>public</span><span> function __isset($name)
</span><span>109</span> <span>    {
</span><span>110</span>         <span>if</span> (array_key_exists($name, $<span>this</span>-><span>_attributes)) {
</span><span>111</span>             <span>return</span> isset($<span>this</span>-><span>_attributes[$name]);
</span><span>112</span>         } <span>else</span><span> {
</span><span>113</span>             <span>return</span><span> parent::__isset($name);
</span><span>114</span> <span>        }
</span><span>115</span> <span>    }
</span><span>116</span> 
<span>117</span>     <span>/*</span><span>*
</span><span>118</span> <span>     * @inheritdoc 同上，重写__unset方法，删除_attributes中的$name属性值
</span><span>119</span>      <span>*/</span>
<span>120</span>     <span>public</span><span> function __unset($name)
</span><span>121</span> <span>    {
</span><span>122</span>         <span>if</span> (array_key_exists($name, $<span>this</span>-><span>_attributes)) {
</span><span>123</span>             unset($<span>this</span>-><span>_attributes[$name]);
</span><span>124</span>         } <span>else</span><span> {
</span><span>125</span> <span>            parent::__unset($name);
</span><span>126</span> <span>        }
</span><span>127</span> <span>    }
</span><span>128</span> 
<span>129</span>     <span>/*</span><span>*
</span><span>130</span> <span>     * Defines an attribute. 定义动态属性的方法
</span><span>131</span> <span>     * @param string $name the attribute name   属性名
</span><span>132</span> <span>     * @param mixed $value the attribute value  属性值
</span><span>133</span>      <span>*/</span>
<span>134</span>     <span>public</span> function defineAttribute($name, $value = <span>null</span><span>)
</span><span>135</span> <span>    {
</span><span>136</span>         $<span>this</span>->_attributes[$name] =<span> $value;
</span><span>137</span> <span>    }
</span><span>138</span> 
<span>139</span>     <span>/*</span><span>*
</span><span>140</span> <span>     * Undefines an attribute. 用于删除动态属性的方法
</span><span>141</span> <span>     * @param string $name the attribute name 属性名
</span><span>142</span>      <span>*/</span>
<span>143</span>     <span>public</span><span> function undefineAttribute($name)
</span><span>144</span> <span>    {
</span><span>145</span>         unset($<span>this</span>-><span>_attributes[$name]);
</span><span>146</span> <span>    }
</span><span>147</span> 
<span>148</span>     <span>/*</span><span>*
</span><span>149</span> <span>     * Adds a validation rule to this model.    添加验证规则
</span><span>150</span> <span>     * You can also directly manipulate [[validators]] to add or remove validation rules.
</span><span>151</span> <span>     * This method provides a shortcut.
</span><span>152</span> <span>     * 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
</span><span>153</span> <span>     * @param string|array $attributes the attribute(s) to be validated by the rule 进行验证的属性
</span><span>154</span> <span>     * @param mixed $validator the validator for the rule.This can be a built-in validator name,
</span><span>155</span> <span>     * a method name of the model class, an anonymous function, or a validator class name.
</span><span>156</span> <span>     * 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。
</span><span>157</span> <span>     * @param array $options the options (name-value pairs) to be applied to the validator
</span><span>158</span> <span>     *  (name-value)被应用到验证器
</span><span>159</span> <span>     * @return static the model itself  模型本身
</span><span>160</span>      <span>*/</span>
<span>161</span>     <span>public</span> function addRule($attributes, $validator, $options =<span> [])
</span><span>162</span> <span>    {
</span><span>163</span>         $validators = $<span>this</span>->getValidators();<span>//</span><span>所有的验证规则对象
</span><span>164</span>         <span>//</span><span>生成Validator对象，并且插入 $validators中</span>
<span>165</span>         $validators->append(Validator::createValidator($validator, $<span>this</span><span>, (array) $attributes, $options));
</span><span>166</span> 
<span>167</span>         <span>return</span> $<span>this</span><span>;
</span><span>168</span> <span>    }
</span><span>169</span> 
<span>170</span>     <span>/*</span><span>*
</span><span>171</span> <span>     * Validates the given data with the specified validation rules.通过指定的规则验证给定的数据
</span><span>172</span> <span>     * This method will create a DynamicModel instance, populate it with the data to be validated,
</span><span>173</span> <span>     * create the specified validation rules, and then validate the data using these rules.
</span><span>174</span> <span>     * @param array $data the data (name-value pairs) to be validated
</span><span>175</span> <span>     * @param array $rules the validation rules. Please refer to [[Model::rules()]] on the format of this parameter.
</span><span>176</span> <span>     * @return static the model instance that contains the data being validated
</span><span>177</span> <span>     * @throws InvalidConfigException if a validation rule is not specified correctly.
</span><span>178</span>      <span>*/</span>
<span>179</span>     <span>public</span> <span>static</span> function validateData(array $data, $rules =<span> [])
</span><span>180</span> <span>    {
</span><span>181</span>         <span>/*</span><span> @var $model DynamicModel </span><span>*/</span>
<span>182</span>         $model = <span>new</span> <span>static</span>($data);<span>//</span><span>实例化调用类，将$data赋值给_attributes</span>
<span>183</span>         <span>if</span> (!<span>empty($rules)) {
</span><span>184</span>             $validators = $model->getValidators();<span>//</span><span>获取所有定义的验证规则</span>
<span>185</span>             <span>foreach</span> ($rules <span>as</span><span> $rule) {
</span><span>186</span>                 <span>if</span><span> ($rule instanceof Validator) {
</span><span>187</span>                     $validators->append($rule);<span>//</span><span>如果$rule是Validator的实例，则添加到$validators中</span>
<span>188</span>                 } elseif (is_array($rule) && isset($rule[<span>0</span>], $rule[<span>1</span>])) { <span>//</span><span> attributes, validator type
</span><span>189</span>                      <span>//</span><span>如果$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</span>
<span>190</span>                     $validator = Validator::createValidator($rule[<span>1</span>], $model, (array) $rule[<span>0</span>], array_slice($rule, <span>2</span><span>));
</span><span>191</span>                     $validators-><span>append($validator);
</span><span>192</span>                 } <span>else</span> {<span>//</span><span>抛出异常</span>
<span>193</span>                     <span>throw</span> <span>new</span> InvalidConfigException(<span>'</span><span>Invalid validation rule: a rule must specify both attribute names and validator type.</span><span>'</span><span>);
</span><span>194</span> <span>                }
</span><span>195</span> <span>            }
</span><span>196</span> <span>        }
</span><span>197</span> 
<span>198</span>         $model->validate();<span>//</span><span>执行验证</span>
<span>199</span> 
<span>200</span>         <span>return</span><span> $model;
</span><span>201</span> <span>    }
</span><span>202</span> 
<span>203</span>     <span>/*</span><span>*
</span><span>204</span> <span>     * @inheritdoc  返回所有的动态属性
</span><span>205</span>      <span>*/</span>
<span>206</span>     <span>public</span><span> function attributes()
</span><span>207</span> <span>    {
</span><span>208</span>         <span>return</span> array_keys($<span>this</span>-><span>_attributes);
</span><span>209</span> <span>    }
</span><span>210</span> }

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