CakePHP 扩展模型不继承属性

Question

如果这最终成为一个新的 PHP 误解，我深表歉意，但无论如何，我有以下 Vip.php 文件：

<?php

class Vip extends AppModel {

    public $useTable = 'vips';
    public $hasOne = 'VipCredential';
    public $belongsTo = array('User', 'MasterExhibitor');

    public $validate = array();

}

class InviteVipForm extends Vip {

}

class AccreditVipForm extends Vip {

}

所以，InviteVipForm 和 AccreditVipForm 类都应该从其父类继承每个模型属性，对吗？这不会发生。我在控制器中加载了InviteVipForm 并打印了。一切为空或设置为默认值（例如useTable 设置为invite_vip_forms，这当然是一个不存在的表）。

AppModel Object ( [useDbConfig] => default [useTable] => invite_vip_forms [id] => [data] => Array ( ) [schemaName] => [table] => invite_vip_forms [primaryKey] => id [_schema:protected] => [validate] => Array ( ) [validationErrors] => Array ( ) [validationDomain] => [plugin] => [name] => InviteVipForm [alias] => InviteVipForm [tableToModel] => Array ( [invite_vip_forms] => InviteVipForm ) [cacheQueries] => [belongsTo] => Array ( ) [hasOne] => Array ( ) [hasMany] => Array ( ) [hasAndBelongsToMany] => Array ( ) [actsAs] => [Behaviors] => BehaviorCollection Object ( [modelName] => InviteVipForm [_methods:protected] => Array ( ) [_mappedMethods:protected] => Array ( ) [_enabled:protected] => Array ( ) [_loaded:protected] => Array ( ) [defaultPriority] => 10 ) [whitelist] => Array ( ) [cacheSources] => 1 [findQueryType] => [recursive] => 1 [order] => [virtualFields] => Array ( ) [_associationKeys:protected] => Array ( [belongsTo] => Array ( [0] => className [1] => foreignKey [2] => conditions [3] => fields [4] => order [5] => counterCache ) [hasOne] => Array ( [0] => className [1] => foreignKey [2] => conditions [3] => fields [4] => order [5] => dependent ) [hasMany] => Array ( [0] => className [1] => foreignKey [2] => conditions [3] => fields [4] => order [5] => limit [6] => offset [7] => dependent [8] => exclusive [9] => finderQuery [10] => counterQuery ) [hasAndBelongsToMany] => Array ( [0] => className [1] => joinTable [2] => with [3] => foreignKey [4] => associationForeignKey [5] => conditions [6] => fields [7] => order [8] => limit [9] => offset [10] => unique [11] => finderQuery ) ) [_associations:protected] => Array ( [0] => belongsTo [1] => hasOne [2] => hasMany [3] => hasAndBelongsToMany ) [__backAssociation] => Array ( ) [__backInnerAssociation] => Array ( ) [__backOriginalAssociation] => Array ( ) [__backContainableAssociation] => Array ( ) [__safeUpdateMode] => [_insertID:protected] => [_sourceConfigured:protected] => [findMethods] => Array ( [all] => 1 [first] => 1 [count] => 1 [neighbors] => 1 [list] => 1 [threaded] => 1 ) [_eventManager:protected] => [_validator:protected] => )

谁能告诉我为什么会这样？这些类不需要位于单独的文件中，是吗？

Answer 1

事情不是这样工作的，每个模型都必须放在一个单独的文件中，否则 CakePHP 可能无法找到/加载它们，然后你将得到一个正在使用的 AppModel 类的实例，这就是你正在经历的。

AppModel 实例当然不会有您在扩展类中定义的任何属性或方法。

Cookbook 中也提到了这种行为，请参阅 http://book.cakephp.org/2.0/en/models.html

如果在/app/Model 中找不到对应的文件，CakePHP 会为您动态创建一个模型对象。这也意味着如果您的模型文件没有正确命名（例如，如果它被命名为ingredient.php 或Ingredients.php 而不是Ingredient.php），CakePHP 将使用AppModel 的实例而不是您的模型文件（ CakePHP 假设它丢失了）。如果您尝试使用您在模型中定义的方法，或者附加到模型的行为，并且您收到的 SQL 错误是您正在调用的方法的名称，这肯定表明 CakePHP找不到您的模型，您需要检查文件名、应用程序缓存或两者。