domain classes领域类

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1 自定义验证：

创建领域类person，编写自定义验证

class Person {     String login    String password    String firstName    String lastName    static constraints = {        password(unique: true,length:5..15,validator: {val,obj->            if(val?.equalsIgnoreCase(obj.firstName)){                return "password.cannot.be.firstname"            }        })    }}

当输入错误时，提示信息为：

2 临时字段

代码：

class Company {            String name            Integer numberOfEmployees            BigDecimal SalaryPaidYTD    static transients = ['SalaryPaidYTD']}

3自定义数据库表

class Person {        String firstName        String lastName        Integer age}

数据库表如图：

自定义：

class Person {        String firstName        String lastName        Integer age   static mapping ={        id column:'p_id'        firstName column: 'p_first_name'        lastName column: 'p_last_name'        age column: 'p_age'        version false        table 'people'   }}

如图：

4 继承

class Employee extends Person {      String employeeNumber      String companyName}

class Player extends Person {             String teamName}

表：

 static mapping ={       tablePerHierarchy false}

表：person

employee

player

5 嵌入

normally:

embedded: