ThinkPHP--collecttion--toArray()

最新推荐文章于 2021-08-20 00:18:02 发布

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最新推荐文章于 2021-08-20 00:18:02 发布

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分类专栏： ThinkPHP5

本文链接：https://blog.youkuaiyun.com/weixin_39618204/article/details/81226392

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这篇博客详细解析了ThinkPHP中`collection`函数将数据集对象转换成数组的过程，涉及`Model`和`Collection`类的相关方法，如`toArray()`。文章通过代码示例展示了如何进行数据过滤、属性追加以及处理关联模型数据。

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1. 

// 必须将结果集转换为数组
        $ruleList = collection(\app\admin\model\AuthRule::where('status', 'normal')->where('ismenu', 1)->order('weigh', 'desc')->cache("__menu__")->select())->toArray();

2.D:\phpStudy\PHPTutorial\WWW\youfang\thinkphp\helper.php

if (!function_exists('collection')) {
/**
* 数组转换为数据集对象
* @param array $resultSet 数据集数组
* @return \think\model\Collection|\think\Collection
*/
function collection($resultSet)
{
$item = current($resultSet);
if ($item instanceof Model) {
return \think\model\Collection::make($resultSet);
} else {
return \think\Collection::make($resultSet);
}
}
}

3.D:\phpStudy\PHPTutorial\WWW\youfang\thinkphp\library\think\Collection.php

public static function make($items = [])
{
return new static($items);//创建 Collection 实例
}

public function toArray()
{
return array_map(function ($value) {
return ($value instanceof Model || $value instanceof self) ?
$value->toArray() :
$value;
}, $this->items);
}

4.D:\phpStudy\PHPTutorial\WWW\youfang\thinkphp\library\think\Model.php

public function toArray()
{
$item = [];
$visible = [];
$hidden = [];

$data = array_merge($this->data, $this->relation);

// 过滤属性
if (!empty($this->visible)) {
$array = $this->parseAttr($this->visible, $visible);
$data = array_intersect_key($data, array_flip($array));
} elseif (!empty($this->hidden)) {
$array = $this->parseAttr($this->hidden, $hidden, false);
$data = array_diff_key($data, array_flip($array));
}

foreach ($data as $key => $val) {
if ($val instanceof Model || $val instanceof ModelCollection) {
// 关联模型对象
$item[$key] = $this->subToArray($val, $visible, $hidden, $key);
} elseif (is_array($val) && reset($val) instanceof Model) {
// 关联模型数据集
$arr = [];
foreach ($val as $k => $value) {
$arr[$k] = $this->subToArray($value, $visible, $hidden, $key);
}
$item[$key] = $arr;
} else {
// 模型属性
$item[$key] = $this->getAttr($key);//!!!!!
}
}
// 追加属性（必须定义获取器）
if (!empty($this->append)) {
foreach ($this->append as $key => $name) {
if (is_array($name)) {
// 追加关联对象属性
$relation = $this->getAttr($key);
$item[$key] = $relation->append($name)->toArray();
} elseif (strpos($name, '.')) {
list($key, $attr) = explode('.', $name);
// 追加关联对象属性
$relation = $this->getAttr($key);
$item[$key] = $relation->append([$attr])->toArray();
} else {
$relation = Loader::parseName($name, 1, false);
if (method_exists($this, $relation)) {
$modelRelation = $this->$relation();
$value = $this->getRelationData($modelRelation);

if (method_exists($modelRelation, 'getBindAttr')) {
$bindAttr = $modelRelation->getBindAttr();
if ($bindAttr) {
foreach ($bindAttr as $key => $attr) {
$key = is_numeric($key) ? $attr : $key;
if (isset($this->data[$key])) {
throw new Exception('bind attr has exists:' . $key);
} else {
$item[$key] = $value ? $value->getAttr($attr) : null;
}
}
continue;
}
}
$item[$name] = $value;
} else {
$item[$name] = $this->getAttr($name);
}
}
}
}
return !empty($item) ? $item : [];
}

public function getAttr($name)
{
try {
$notFound = false;
$value = $this->getData($name);
} catch (InvalidArgumentException $e) {
$notFound = true;
$value = null;
}

// 检测属性获取器
$method = 'get' . Loader::parseName($name, 1) . 'Attr';
if (method_exists($this, $method)) {
$value = $this->$method($value, $this->data, $this->relation);
} elseif (isset($this->type[$name])) {
// 类型转换
$value = $this->readTransform($value, $this->type[$name]);
} elseif (in_array($name, [$this->createTime, $this->updateTime])) {
if (is_string($this->autoWriteTimestamp) && in_array(strtolower($this->autoWriteTimestamp), [
'datetime',
'date',
'timestamp',
])
) {
$value = $this->formatDateTime(strtotime($value), $this->dateFormat);
} else {
$value = $this->formatDateTime($value, $this->dateFormat);
}
} elseif ($notFound) {
$relation = Loader::parseName($name, 1, false);
if (method_exists($this, $relation)) {
$modelRelation = $this->$relation();
// 不存在该字段获取关联数据
$value = $this->getRelationData($modelRelation);
// 保存关联对象值
$this->relation[$name] = $value;
} else {
throw new InvalidArgumentException('property not exists:' . $this->class . '->' . $name);
}
}
return $value;
}