php - MySql 外键查询错误

Question

我正在mysql数据库中插入这个magento数据库表

CREATE TABLE `customer_address_entity` (
  `entity_id` int(10) unsigned NOT NULL AUTO_INCREMENT COMMENT 'Entity Id',
  `entity_type_id` smallint(5) unsigned NOT NULL DEFAULT '0' COMMENT 'Entity Type Id',
  `attribute_set_id` smallint(5) unsigned NOT NULL DEFAULT '0' COMMENT 'Attribute Set Id',
  `increment_id` varchar(50) DEFAULT NULL COMMENT 'Increment Id',
  `parent_id` int(10) unsigned DEFAULT NULL COMMENT 'Parent Id',
  `created_at` timestamp NOT NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP COMMENT 'Created At',
  `updated_at` timestamp NOT NULL DEFAULT '0000-00-00 00:00:00' COMMENT 'Updated At',
  `is_active` smallint(5) unsigned NOT NULL DEFAULT '1' COMMENT 'Is Active',
  PRIMARY KEY (`entity_id`),
  KEY `IDX_CUSTOMER_ADDRESS_ENTITY_PARENT_ID` (`parent_id`),
  CONSTRAINT `FK_CUSTOMER_ADDRESS_ENTITY_PARENT_ID_CUSTOMER_ENTITY_ENTITY_ID` FOREIGN KEY (`parent_id`) REFERENCES `customer_entity` (`entity_id`) ON DELETE CASCADE ON UPDATE CASCADE
) ENGINE=InnoDB AUTO_INCREMENT=96 DEFAULT CHARSET=utf8 COMMENT='Customer Address Entity';

但它显示错误消息

#1215 - 无法添加外键约束

如何修复此错误？

Answer 1

#1215 - Cannot add foreign key constraint

错误表明您的外键“customer_entity.entity_id”的引用存在问题

您应该检查是否:

• 表“customer_entity”存在
• 列“customer_entity.entity_id”存在
• “customer_address_entity.parent_id”和“customer_entity.entity_id”的类型完全相同相同
• 表“customer_address_entity”和“customer_entity”的字符集相同

无论如何，请提供有关数据库架构的更多信息，或者至少提供有关所涉及表的更多信息。