Grails 3域类名为“应用程序”的问题

Question

我有一个旧系统，正在迁移到Grails 3，但遇到了命名约定问题。 我们的表之一称为Application但它也是运行该应用程序的Groovy类的名称。 GORM似乎混淆了这两个类并给出了类型转换错误，这似乎是一个问题。 我试图明确铸造我的Application类中我ApplicationDegree类，试图迫使格姆承认我尝试使用，但没有成功的类。

我知道一个选择是，我可以将域Application类重命名为其他类，然后手动将其映射到适当的数据库表，但是我希望避免这种情况，因为我预见了以后的问题。

因此，除了重命名我的Domain类之外，我如何才能获得Grails / GORM来进行正确的映射。

Grails 3.1.4

码：

ApplicationDegree ad = ApplicationDegree.findById(10);

类：

class ApplicationDegree {

    Boolean isPrimary
    domain.package.Application application
    Degree degree

    static hasMany = [applicationDegreeMajors: ApplicationDegreeMajor,
                      applicationDegreeMinors: ApplicationDegreeMinor]
    static belongsTo = [domain.package.Application, Degree]

    static mapping = {
        version false
        degree column: 'degree_code'
        isPrimary column: 'isPrimary'
    }
}

堆栈跟踪：

ERROR org.grails.spring.beans.factory.OptimizedAutowireCapableBeanFactory - Bean couldn't be autowired using grails optimization: Property 'application' threw exception; nested exception is java.lang.IllegalArgumentException: argument type mismatch
ERROR org.grails.spring.beans.factory.OptimizedAutowireCapableBeanFactory - Retrying using spring autowire
ERROR org.grails.web.errors.GrailsExceptionResolver - IllegalStateException occurred when processing request: [GET] /app4grad_V2/college/applications/
Cannot convert value of type [app4grad.Application] to required type [domain.package.Application] for property 'application': no matching editors or conversion strategy found. Stacktrace follows:
java.lang.reflect.InvocationTargetException: null
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
    at java.lang.Thread.run(Thread.java:745)
Caused by: org.hibernate.InstantiationException: Could not instantiate entity:  : domain.package.ApplicationDegree
    at app4grad.college.ApplicationsController$$EPuFyMDe.index(ApplicationsController.groovy:14)
    ... 3 common frames omitted
Caused by: java.lang.reflect.InvocationTargetException: null
    ... 4 common frames omitted
Caused by: org.springframework.beans.ConversionNotSupportedException: Failed to convert property value of type [app4grad.Application] to required type [domain.package.Application] for property 'application'; nested exception is java.lang.IllegalStateException: Cannot convert value of type [app4grad.Application] to required type [domain.package.Application] for property 'application': no matching editors or conversion strategy found
    ... 4 common frames omitted
Caused by: java.lang.IllegalStateException: Cannot convert value of type [app4grad.Application] to required type [domain.package.Application] for property 'application': no matching editors or conversion strategy found
    ... 4 common frames omitted

Answer 1

我有同样的问题，问题是您使用的是保留名称： https : //grails.org/wiki/Reserved%20Names
使用Intelij Idea，您可以轻松地重命名您的域类，而IDE会为您完成其余工作。