Question

我有两个数据库表如下：

CREATE TABLE `customer` (
    `id` char(36) NOT NULL,
    `name` varchar(50) NOT NULL,
    `lastname` varchar(50) NOT NULL,
    PRIMARY KEY (`id`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8;


CREATE TABLE `customer_detail` (
    `customer_id` char(36) NOT NULL,
    `creation_date` date DEFAULT NULL,
    `deletion_date` date DEFAULT NULL,
    PRIMARY KEY (`customer_id`),
    CONSTRAINT `FK_customer_detail_customer_id` FOREIGN KEY (`customer_id`) REFERENCES `customer` (`id`) ON DELETE CASCADE
) ENGINE=InnoDB DEFAULT CHARSET=utf8;

和两个映射这些表的域类

class Customer {
    String name
    String lastname

    static hasOne = [detail: CustomerDetail]

    static mapping = {
        id generator: "assigned"
        version false
    }

    static constraints = {
        name maxSize: 50
        lastname maxSize: 50
        detail nullable: true, unique: true
    }
}


class CustomerDetail {
    Date creationDate
    Date deletionDate

    static belongsTo = [customer:Customer]

    static mapping = {
        id generator: "assigned", column: "customer_id", insert: false, update: false
        version false
    }
}

当我运行应用程序（run-app）时，我收到以下错误：

由MappingException引起：实体映射中的重复列：my.data.domain.CustomerDetail列：customer_id（应使用insert =＆＃34映射; false＆＃34; update =＆＃34; false＆＃34;）

如果我删除GORM，则在Customer.id和CustomerDetail.id上设置一对一引用字段customer_detail.id不存在于db中，我无法修改db结构。

解决方法是什么？

提前谢谢

单

Answer 1

我在这里找到了解决方案Grails domain-classes mapping in one-to-one relation所以这些是工作域类：

class Customer {
    String id;
    String name
    String lastname

    static hasOne = [detail: CustomerDetail]

    static mapping = {
        id generator: "assigned"
        version false
    }

    static constraints = {
        name maxSize: 50
        lastname maxSize: 50
        detail nullable: true, unique: true
    }
}


class CustomerDetail {
    String id;
    Date creationDate
    Date deletionDate
    Customer customer

    static mapping = {
        id column: '`customer_id`', generator: 'foreign', params: [ property: 'customer'], type: "text"
        customer column: '`customer_id`', insertable: false, updateable: false, type: "text"        
        version false
    }
}

Grails GORM一对一关系问题：列:(应该用insert =＆＃34映射; false＆＃34; update =＆＃34; false＆＃34;）

1 个答案: