Grails 3域名爲「Application」的問題

Question

我有一個遺留系統，我正在遷移到Grails 3，但我遇到了一個命名約定問題。我們的其中一個表名爲Application，但它也是運行該應用程序的Groovy類的名稱。似乎有一個問題，GORM混淆了2個類並給出了類型轉換錯誤。我曾嘗試明確地在我的ApplicationDegree課中投入我的Application課程，試圖強制GORM識別我嘗試使用的課程，但沒有成功。

我知道一個選擇是我可以將我的域Application類重命名爲其他類型，並手動將其映射到適當的數據庫表，但是我想避免這種情況，因爲我預見到問題將會消失。

因此，除了重命名我的Domain類之外，我怎樣才能讓Grails/GORM做出正確的映射。

的Grails 3.1.4

代碼：

ApplicationDegree ad = ApplicationDegree.findById(10); 

類：

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' 
    } 
} 

堆棧跟蹤：

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SAM問題是，您使用的保留名稱是：https://grails.org/wiki/Reserved%20Names
使用Intelij Idea，您可以輕鬆地將您重命名爲域名類，IDE將爲您完成剩下的工作。