Question

从Grails 2.2.4迁移到2.4.3后，在条件查询中使用该属性时，具有名为applicationContext的属性的域类会抛出异常。

class WebResource {
     String applicationContext
}

class ResourceService {
  public WebResource getResourceByContext(String ctx) {
     WebResource.withCriteria() {
         eq('applicationContext', ctx)
     }
  }
}

对getResourceByContext（）的调用会抛出异常：

    org.hibernate.QueryException: could not resolve property: applicationContext of: org.mydomain.WebResource
 at org.hibernate.persister.entity.AbstractPropertyMapping.propertyException(AbstractPropertyMapping.java:83)
        at org.hibernate.persister.entity.AbstractPropertyMapping.toType(AbstractPropertyMapping.java:77)
        at org.hibernate.persister.entity.AbstractEntityPersister.getSubclassPropertyTableNumber(AbstractEntityPersister.java:1995)
        at org.hibernate.persister.entity.BasicEntityPropertyMapping.toColumns(BasicEntityPropertyMapping.java:61)
        at org.hibernate.persister.entity.AbstractEntityPersister.toColumns(AbstractEntityPersister.java:1970)
        at org.hibernate.loader.criteria.CriteriaQueryTranslator.getColumns(CriteriaQueryTranslator.java:518)
        at org.hibernate.loader.criteria.CriteriaQueryTranslator.findColumns(CriteriaQueryTranslator.java:534)
        at org.hibernate.criterion.SimpleExpression.toSqlString(SimpleExpression.java:82)
        at org.hibernate.loader.criteria.CriteriaQueryTranslator.getWhereCondition(CriteriaQueryTranslator.java:417)
        at org.hibernate.loader.criteria.CriteriaJoinWalker.(CriteriaJoinWalker.java:123)
        at org.hibernate.loader.criteria.CriteriaJoinWalker.(CriteriaJoinWalker.java:92)
        at org.hibernate.loader.criteria.CriteriaLoader.(CriteriaLoader.java:97)
        at org.hibernate.internal.SessionImpl.list(SessionImpl.java:1663)
        at org.hibernate.internal.CriteriaImpl.list(CriteriaImpl.java:380)
        at org.codehaus.groovy.grails.orm.hibernate.query.AbstractHibernateCriteriaBuilder.invokeMethod(AbstractHibernateCriteriaBuilder.java:1639)
        at org.codehaus.groovy.runtime.InvokerHelper.invokePogoMethod(InvokerHelper.java:907)
        at org.codehaus.groovy.runtime.InvokerHelper.invokeMethod(InvokerHelper.java:884)
        at org.grails.datastore.gorm.GormStaticApi$_withCriteria_closure11.doCall(GormStaticApi.groovy:304)
        at sun.reflect.GeneratedMethodAccessor254.invoke(Unknown Source)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:606)
        at org.codehaus.groovy.reflection.CachedMethod.invoke(CachedMethod.java:90)
        at groovy.lang.MetaMethod.doMethodInvoke(MetaMethod.java:324)
        at groovy.lang.MetaClassImpl.invokeMethod(MetaClassImpl.java:1207)
        at groovy.lang.ExpandoMetaClass.invokeMethod(ExpandoMetaClass.java:1110)
        at groovy.lang.MetaClassImpl.invokeMethod(MetaClassImpl.java:1016)
        at groovy.lang.Closure.call(Closure.java:423)
        at org.codehaus.groovy.runtime.ConvertedClosure.invokeCustom(ConvertedClosure.java:51)
        at org.codehaus.groovy.runtime.ConversionHandler.invoke(ConversionHandler.java:81)
        at com.sun.proxy.$Proxy29.doInSession(Unknown Source)
        at org.grails.datastore.mapping.core.DatastoreUtils.execute(DatastoreUtils.java:302)
        at org.grails.datastore.gorm.AbstractDatastoreApi.execute(AbstractDatastoreApi.groovy:37)
        at org.grails.datastore.gorm.GormStaticApi.withCriteria(GormStaticApi.groovy:303)
        at org.mydomain.WebResource.withCriteria(WebResource.groovy)

拥有名称为＆＃39; applicationContext＆＃39;的域名属性Grails 2.4.3中不允许这样做？我无法在Grails发行说明，升级指南或JIRA中找到对此方案的引用。我通过重命名字段并将GORM引用更改为新名称来解决此问题：

class WebResource {
    String appContext
    appContext column: 'APPLICATION_CONTEXT'
    public String getApplicationContext() {
        return appContext
    }

    public void setApplicationContext(String c) {
        appContext = c
    }
}

Answer 1

鉴于Spring ApplicationContext的名称冲突，我怀疑你已经找到了最好的答案 - 将属性命名为其他内容并使用mapping定义来设置数据库列名。我建议你不要添加getter / setter对，但只需在代码中直接使用属性名appContext，因为Grails核心或插件中有很多可能的位置（在我看来相当合理）一个名为applicationContext的属性是Spring对象而不是其他任何东西。

除非必须，否则不要与公约作斗争。

'applicationContext'是否被禁止作为Grails 2.4.3中的域属性名称？

1 个答案: