Validation 在每个场景中表现不同

场景1: 我有两门课：

void testFirstPost() {
def user = new User(userId: 'joe',password: 'secret').save()
def post1 = new Post(content: "First post... W00t!")
user.addToPosts(post1)
def post2 = new Post(content: "Second post...")
user.addToPosts(post2) }

发布：

class Post {
String content
Date dateCreated
static constraints = {
content(blank: false)
}
static belongsTo = [ user : User ]
}

class User {
// existing code here
static hasMany = [ posts : Post ]
}

class User {
    String login
    String password
    Profile profile
    Status status
    static hasMany = [ holidays : Holiday ]
    static constraints = { 
        login(unique:true,size:2..20)
        password(size:2..20) //more to be added later!
        profile(nullable:true)
        company(nullable:true)
    }
    static belongsTo = [ company : Company ]
}

class Company {
    String shortName;
    String name 
    Date dateCreated
    String region
    String email
    Address address
    Status status   
    Long tel
    Long fax
    static hasMany = [ users : User]
        static constraints = {
        }
    static mapping = {
        address lazy:false
        status lazy:false
    }
}

用户：

class Post {
String content
Date dateCreated
static constraints = {
content(blank: false)
}
static belongsTo = [ user : User ]
}

class User {
// existing code here
static hasMany = [ posts : Post ]
}

class User {
    String login
    String password
    Profile profile
    Status status
    static hasMany = [ holidays : Holiday ]
    static constraints = { 
        login(unique:true,size:2..20)
        password(size:2..20) //more to be added later!
        profile(nullable:true)
        company(nullable:true)
    }
    static belongsTo = [ company : Company ]
}

class Company {
    String shortName;
    String name 
    Date dateCreated
    String region
    String email
    Address address
    Status status   
    Long tel
    Long fax
    static hasMany = [ users : User]
        static constraints = {
        }
    static mapping = {
        address lazy:false
        status lazy:false
    }
}

这是一个经典的一对多关系。这些类的集成测试：

void testFirstPost() {
def user = new User(userId: 'joe',password: 'secret').save()
def post1 = new Post(content: "First post... W00t!")
user.addToPosts(post1)
def post2 = new Post(content: "Second post...")
user.addToPosts(post2) }

效果很好。但是如果你考虑其他两个类：

场景2:

用户：

class Post {
String content
Date dateCreated
static constraints = {
content(blank: false)
}
static belongsTo = [ user : User ]
}

class User {
// existing code here
static hasMany = [ posts : Post ]
}

class User {
    String login
    String password
    Profile profile
    Status status
    static hasMany = [ holidays : Holiday ]
    static constraints = { 
        login(unique:true,size:2..20)
        password(size:2..20) //more to be added later!
        profile(nullable:true)
        company(nullable:true)
    }
    static belongsTo = [ company : Company ]
}

class Company {
    String shortName;
    String name 
    Date dateCreated
    String region
    String email
    Address address
    Status status   
    Long tel
    Long fax
    static hasMany = [ users : User]
        static constraints = {
        }
    static mapping = {
        address lazy:false
        status lazy:false
    }
}

公司：

class Post {
String content
Date dateCreated
static constraints = {
content(blank: false)
}
static belongsTo = [ user : User ]
}

class User {
// existing code here
static hasMany = [ posts : Post ]
}

class User {
    String login
    String password
    Profile profile
    Status status
    static hasMany = [ holidays : Holiday ]
    static constraints = { 
        login(unique:true,size:2..20)
        password(size:2..20) //more to be added later!
        profile(nullable:true)
        company(nullable:true)
    }
    static belongsTo = [ company : Company ]
}

class Company {
    String shortName;
    String name 
    Date dateCreated
    String region
    String email
    Address address
    Status status   
    Long tel
    Long fax
    static hasMany = [ users : User]
        static constraints = {
        }
    static mapping = {
        address lazy:false
        status lazy:false
    }
}

又是经典的一对多关系

对于这些类，我编写了如下测试：

void testSaveUser() {
        def status1 = new Status(name:"Busy")
        status1.save(flush:true)        
        def user = new User(login:"anto",password:"anything",
            status:status1)
        assert user.save(flush:true, failOnError: true)
    }

即使这个测试也很好。注意，在第二个

User

类中，我将

company

字段的约束设置为

company（nullable:true）

，如果我没有设置该约束，则上述测试（

testSaveUser（）

）将失败

我得到的错误是：

Validation Error(s) occurred during save(): - Field error in object 'mnm.User' on field 'company': rejected value [null]; codes [mnm.User.company.nullable.error.mnm.User.company,mnm.User.company.nullable.error.company,mnm.User.company.nullable.error.mnm.Company,mnm.User.company.nullable.error,user.company.nullable.error.mnm.User.company,user.company.nullable.error.company,user.company.nullable.error.mnm.Company,user.company.nullable.error,mnm.User.company.nullable.mnm.User.company,mnm.User.company.nullable.company,mnm.User.company.nullable.mnm.Company,mnm.User.company.nullable,user.company.nullable.mnm.User.company,user.company.nullable.company,user.company.nullable.mnm.Company,user.company.nullable,nullable.mnm.User.company,nullable.company,nullable.mnm.Company,nullable]; arguments [company,class mnm.User]; default message [Property [{0}] of class [{1}] cannot be null]
grails.validation.ValidationException: Validation Error(s) occurred during save():
- Field error in object 'mnm.User' on field 'company': rejected value [null]; codes [mnm.User.company.nullable.error.mnm.User.company,mnm.User.company.nullable.error.company,mnm.User.company.nullable.error.mnm.Company,mnm.User.company.nullable.error,user.company.nullable.error.mnm.User.company,user.company.nullable.error.company,user.company.nullable.error.mnm.Company,user.company.nullable.error,mnm.User.company.nullable.mnm.User.company,mnm.User.company.nullable.company,mnm.User.company.nullable.mnm.Company,mnm.User.company.nullable,user.company.nullable.mnm.User.company,user.company.nullable.company,user.company.nullable.mnm.Company,user.company.nullable,nullable.mnm.User.company,nullable.company,nullable.mnm.Company,nullable]; arguments [company,class mnm.User]; default message [Property [{0}] of class [{1}] cannot be null]

    at mnm.UserIntegrationTests.testSaveUser(UserIntegrationTests.groovy:18)

即使场景1和场景2都是相同的，为什么场景2强制我添加

公司（可空：true）

约束

（请注意，我使用的是grails1.3.7，并在同一版本中运行了这两个场景！）

---

提前感谢。

如果某个

内容属于其他内容，默认情况下它不能为
null

在您的测试中，在
保存
之前，您没有（仍然）为用户设置
公司
，因此它将在默认约束下失败
如果某项
属于某项
其他内容，默认情况下它不能为
空

在你的测试中，在你保存之前，你没有（仍然）为用户设置一个
company
，因此它将失败，默认约束是
Oh ya，我再一次忘记了这个规则。现在它可以工作了谢谢tim_yates先生：）哦，是的，我又一次忘记了这个规则。现在它可以工作了谢谢tim_yates先生：）