Question

我在尝试创建数据时遇到主键约束......

class BootStrap {      
def init = { servletContext ->
     new ListItPlan(m_id: "248656", plan_id: "12345XX9876543").save()
     new ListItPlan(m_id: "209459", plan_id: "12345XX9876543").save()
     new ListItPlan(m_id: "248656", plan_id: "56748XXX123933").save()
     new ListItPlan(m_id: "209459", plan_id: "56748XXX123933").save() 

     new Plan(plan_id: "12345XX9876543", p_id_type: "PLAN-ID").save()         
     new Plan(plan_id: "56748XXX123933", p_id_type: "PLAN-ID").save() 

     new Cred(m_id: "248656", d_name: "Lorem Ipsum").save()
     new Cred(m_id: "209459", d_name: "Ipsum").save()     
}     
def destroy = {     } }

我做了一些研究并对其进行了一些修改。我尝试了不同的东西，但我想我只是不了解如何构建数据。我尝试过这样的事情......

def d1 = new Cred(m_id: "248656", d_name: "Lorem Ipsum").save(failOnError:     true) 
def ldp1 = new ListItPlan(Cred : d1, plan_id: "12345XX9876543").save(failOnError: true)

...但我不能让它填充表格。请帮忙......

我的模特......

class ListItPlan {
    String m_id
    String plan_id      
    static hasMany = [creds : Cred, plans : Plan]

    static constraints = {
        m_id()
        plan_id()
    }
}

class Cred {
    String m_id
    String g_name
    static belongsTo = [owner : ListItPlan]
    static hasMany = [plans : Plan]

    static constraints = {
    }
}

class Plan {
    String plan_id
    String plan_id_type
    static belongsTo = [listItPlan : ListItPlan, cred: Cred]

    static constraints = {  
    }
}

如何编写正确的语句以根据模型的结构将数据输入表中？提前谢谢。

Answer 1

如果m_id是＆＃34;主键＆＃34;在您插入的桌子上，它必须是唯一的。你有两次相同的密钥。

试试这个：

new ListItPlan(m_id: "1", plan_id: "12345XX9876543").save()
new ListItPlan(m_id: "2", plan_id: "12345XX9876543").save()
new ListItPlan(m_id: "3", plan_id: "56748XXX123933").save()
new ListItPlan(m_id: "4", plan_id: "56748XXX123933").save()

当我尝试在grails中创建数据时，我得到了主键约束

1 个答案: