vendor/yiisoft/yii2/base/Model.php（续
/**
* 设置属性值
* @param array $values attribute values (name => value) to be assigned to the model.
* @param boolean $safeOnly whether the assignments should only be done to the safe attributes.
* 一个安全属性是与一个验证规则在当前的[[情况]]。
* @see safeAttributes()
* @see attributes()
*/
public function setAttributes($values, $safeOnly = true)
{
// 必须是个数组
if (is_array($values)) {
// array_flip — 交换数组中的键和值
// 将属性放到了 key 上
// 默认取 safeAttributes 中的属性
$attributes = array_flip($safeOnly ? $this->safeAttributes() : $this->attributes());
foreach ($values as $name => $value) {
if (isset($attributes[$name])) {
// 如果存在该属性，就直接赋值
$this->$name = $value;
} elseif ($safeOnly) {
// 如果不存在，而且是 safeOnly 的话，就触发一下 onUnsafeAttribute 方法
$this->onUnsafeAttribute($name, $value);
}
}
}
}
/**
* This method is invoked when an unsafe attribute is being massively assigned.
* The default implementation will log a warning message if YII_DEBUG is on.
* It does nothing otherwise.
* @param string $name the unsafe attribute name
* @param mixed $value the attribute value
*/
public function onUnsafeAttribute($name, $value)
{
if (YII_DEBUG) {
// 如果是调试状态，就打 log 记录下，没有成功设置的不安全的属性
Yii::trace("Failed to set unsafe attribute ‘$name‘ in ‘" . get_class($this) . "‘.", __METHOD__);
}
}
/**
* Returns the scenario that this model is used in.
*
* Scenario affects how validation is performed and which attributes can
* be massively assigned.
*
* @return string the scenario that this model is in. Defaults to [[SCENARIO_DEFAULT]].
*/
public function getScenario()
{
// 获取当前的场景
return $this->_scenario;
}
/**
* Sets the scenario for the model.
* Note that this method does not check if the scenario exists or not.
* The method [[validate()]] will perform this check.
* @param string $value the scenario that this model is in.
*/
public function setScenario($value)
{
// 设置当前的场景
$this->_scenario = $value;
}
/**
* Returns the attribute names that are safe to be massively assigned in the current scenario.
* @return string[] safe attribute names
*/
public function safeAttributes()
{
// 获取当前的场景
$scenario = $this->getScenario();
// 获取所有场景及其属性
$scenarios = $this->scenarios();
if (!isset($scenarios[$scenario])) {
// 场景不存在，就返回空
return [];
}
$attributes = [];
foreach ($scenarios[$scenario] as $attribute) {
// 将开头不是！的属性才会放入到 safeAttributes 中, 即以！开头的属性不会被放到 safeAttributes 中
if ($attribute[0] !== ‘!‘) {
$attributes[] = $attribute;
}
}
return $attributes;
}
/**
* Returns the attribute names that are subject to validation in the current scenario.
* @return string[] safe attribute names
*/
public function activeAttributes()
{
// 同上
$scenario = $this->getScenario();
$scenarios = $this->scenarios();
if (!isset($scenarios[$scenario])) {
return [];
}
// 获取当前场景中的所有属性
$attributes = $scenarios[$scenario];
foreach ($attributes as $i => $attribute) {
// 如果属性名以！开头，就把！截取掉
// ！开头的属性来自rules，加！能够使规则（即 validator）生效，但却能够不出现在 safeAttributes 中
if ($attribute[0] === ‘!‘) {
$attributes[$i] = substr($attribute, 1);
}
}
return $attributes;
}
/**
* Populates the model with the data from end user.
* The data to be loaded is `$data[formName]`, where `formName` refers to the value of [[formName()]].
* If [[formName()]] is empty, the whole `$data` array will be used to populate the model.
* The data being populated is subject to the safety check by [[setAttributes()]].
* 加载数据到所在的 model 中
* @param array $data the data array. This is usually `$_POST` or `$_GET`, but can also be any valid array
* supplied by end user.
* @param string $formName the form name to be used for loading the data into the model.
* If not set, [[formName()]] will be used.
* @return boolean whether the model is successfully populated with some data.
*/
public function load($data, $formName = null)
{
// 如果存在 yii 的 form，就使用该 form，否则就拿到所在类的名称（不含 namespace）
$scope = $formName === null ? $this->formName() : $formName;
if ($scope === ‘‘ && !empty($data)) {
// 如果 $scope 为空字符串，且 $data不为空，就设置属性
// 即 $formName 为空字符串，且 $data不为空
$this->setAttributes($data);
return true;
} elseif (isset($data[$scope])) {
// 否则，必须存在 $data[$scope]，使用 $data[$scope] 去设置属性
$this->setAttributes($data[$scope]);
return true;
} else {
return false;
}
}
/**
* Populates a set of models with the data from end user.
* 加载数据到所在的 model 的集合中
* This method is mainly used to collect tabular data input.
* The data to be loaded for each model is `$data[formName][index]`, where `formName`
* refers to the value of [[formName()]], and `index` the index of the model in the `$models` array.
* If [[formName()]] is empty, `$data[index]` will be used to populate each model.
* The data being populated to each model is subject to the safety check by [[setAttributes()]].
* @param array $models the models to be populated. Note that all models should have the same class.
* @param array $data the data array. This is usually `$_POST` or `$_GET`, but can also be any valid array
* supplied by end user.
* @param string $formName the form name to be used for loading the data into the models.
* If not set, it will use the [[formName()]] value of the first model in `$models`.
* This parameter is available since version 2.0.1.
* @return boolean whether at least one of the models is successfully populated.
*/
public static function loadMultiple($models, $data, $formName = null)
{
if ($formName === null) {
/* @var $first Model */
// reset — 将数组的内部指针指向第一个单元
$first = reset($models);
if ($first === false) {
// 不存在就返回 false
return false;
}
// 拿到所在类的名称（不含 namespace）
$formName = $first->formName();
}
$success = false;
// 遍历 $models，一个个 load 数据
foreach ($models as $i => $model) {
/* @var $model Model */
if ($formName == ‘‘) {
if (!empty($data[$i])) {
// 数据不为空，就 load 到相应的 model 中
$model->load($data[$i], ‘‘);
$success = true;
}
} elseif (!empty($data[$formName][$i])) {
// 存在 $formName，且数据不为空，就 load 到相应的 model 中
$model->load($data[$formName][$i], ‘‘);
$success = true;
}
}
return $success;
}
）
时间： 2024-10-05 07:41:06