Grails 可搜索插件错误映射 hasMany

Question

我正在使用 0.6.3 的 searchable 和 grails-1.3.7。如果我不映射域 hasMany 属性，则工作正常。但是，如果我映射一个 hasMany 属性，如文档中的示例：

http://www. grails.org/Searchable+Plugin+-+Mapping+-+Class+Property+Mapping

 comments component: true

或

 keywords index: 'not_analyzed'

在可搜索闭包中，出现此错误

2011-10-10 15:20:53,788 [main] ERROR context.GrailsContextLoader  - Error executing bootstraps: Error creating bean with name 'compassGps': Cannot resolve reference to bean 'compass' while setting bean property 'compass'; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'compass': FactoryBean threw exception on object creation; nested exception is java.lang.IllegalArgumentException: Unable to map [com.ace.mws.servicetemplates.ServiceTemplate.services]. It does not appear to a suitable 'searchable property' (normally simple types like Strings, Dates, Numbers, etc), 'searchable reference' (normally another domain class) or 'searchable component' (normally another domain class defined as a component, using the 'embedded' declaration). Is it a derived property (a getter method with no equivalent field) defined with 'def'? Try defining it with a more specific return type
org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'compassGps': Cannot resolve reference to bean 'compass' while setting bean property 'compass'; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'compass': FactoryBean threw exception on object creation; nested exception is java.lang.IllegalArgumentException: Unable to map [com.ace.mws.servicetemplates.ServiceTemplate.services]. It does not appear to a suitable 'searchable property' (normally simple types like Strings, Dates, Numbers, etc), 'searchable reference' (normally another domain class) or 'searchable component' (normally another domain class defined as a component, using the 'embedded' declaration). Is it a derived property (a getter method with no equivalent field) defined with 'def'? Try defining it with a more specific return type
        at org.grails.tomcat.TomcatServer.start(TomcatServer.groovy:212)
        at grails.web.container.EmbeddableServer$start.call(Unknown Source)
        at grails.web.container.EmbeddableServer$start.call(Unknown Source)
        at _GrailsRun_groovy$_run_closure5_closure12.doCall(_GrailsRun_groovy:158)
        at _GrailsRun_groovy$_run_closure5_closure12.doCall(_GrailsRun_groovy)
        at _GrailsSettings_groovy$_run_closure10.doCall(_GrailsSettings_groovy:280)
        at _GrailsSettings_groovy$_run_closure10.call(_GrailsSettings_groovy)
        at _GrailsRun_groovy$_run_closure5.doCall(_GrailsRun_groovy:149)
        at _GrailsRun_groovy$_run_closure5.call(_GrailsRun_groovy)
        at _GrailsRun_groovy.runInline(_GrailsRun_groovy:116)
        at _GrailsRun_groovy.this$4$runInline(_GrailsRun_groovy)
        at _GrailsRun_groovy$_run_closure1.doCall(_GrailsRun_groovy:59)
        at _GrailsRun_groovy$_run_closure8_closure14.doCall(_GrailsRun_groovy:263)
        at _GrailsRun_groovy$_run_closure8_closure14.doCall(_GrailsRun_groovy)
        at _GrailsPackage_groovy$_run_closure8.doCall(_GrailsPackage_groovy:299)
        at _GrailsPackage_groovy$_run_closure8.call(_GrailsPackage_groovy)
        at _GrailsRun_groovy$_run_closure8.doCall(_GrailsRun_groovy:245)
        at RunApp$_run_closure1.doCall(RunApp:35)
        at gant.Gant$_dispatch_closure5.doCall(Gant.groovy:381)
        at gant.Gant$_dispatch_closure7.doCall(Gant.groovy:415)
        at gant.Gant$_dispatch_closure7.doCall(Gant.groovy)
        at gant.Gant.withBuildListeners(Gant.groovy:427)
        at gant.Gant.this$2$withBuildListeners(Gant.groovy)
        at gant.Gant$this$2$withBuildListeners.callCurrent(Unknown Source)
        at gant.Gant.dispatch(Gant.groovy:415)
        at gant.Gant.this$2$dispatch(Gant.groovy)
        at gant.Gant.invokeMethod(Gant.groovy)
        at gant.Gant.executeTargets(Gant.groovy:590)
        at gant.Gant.executeTargets(Gant.groovy:589)
Caused by: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'compass': FactoryBean threw exception on object creation; nested exception is java.lang.IllegalArgumentException: Unable to map [com.ace.mws.servicetemplates.ServiceTemplate.services]. It does not appear to a suitable 'searchable property' (normally simple types like Strings, Dates, Numbers, etc), 'searchable reference' (normally another domain class) or 'searchable component' (normally another domain class defined as a component, using the 'embedded' declaration). Is it a derived property (a getter method with no equivalent field) defined with 'def'? Try defining it with a more specific return type
        ... 29 more
Caused by: java.lang.IllegalArgumentException: Unable to map [com.ace.mws.servicetemplates.ServiceTemplate.services]. It does not appear to a suitable 'searchable property' (normally simple types like Strings, Dates, Numbers, etc), 'searchable reference' (normally another domain class) or 'searchable component' (normally another domain class defined as a component, using the 'embedded' declaration). Is it a derived property (a getter method with no equivalent field) defined with 'def'? Try defining it with a more specific return type
        at grails.plugin.searchable.internal.compass.mapping.ClosureSearchableGrailsDomainClassCompassClassMapper.invokeMethod(ClosureSearchableGrailsDomainClassCompassClassMapper.groovy:217)
        at com.ace.mws.servicetemplates.ServiceTemplate$__clinit__closure1.doCall(ServiceTemplate.groovy:6)
        at com.ace.mws.servicetemplates.ServiceTemplate$__clinit__closure1.doCall(ServiceTemplate.groovy)
        at grails.plugin.searchable.internal.compass.mapping.ClosureSearchableGrailsDomainClassCompassClassMapper.searchableGetCompassClassPropertyMappings(ClosureSearchableGrailsDomainClassCompassClassMapper.groovy:97)
        at grails.plugin.searchable.internal.compass.mapping.ClosureSearchableGrailsDomainClassCompassClassMapper.this$3$searchableGetCompassClassPropertyMappings(ClosureSearchableGrailsDomainClassCompassClassMapper.groovy)
        at grails.plugin.searchable.internal.compass.mapping.ClosureSearchableGrailsDomainClassCompassClassMapper.getCompassClassMapping(ClosureSearchableGrailsDomainClassCompassClassMapper.groovy:129)
        at grails.plugin.searchable.internal.compass.mapping.CompositeSearchableGrailsDomainClassCompassClassMapper.getCompassClassMapping(CompositeSearchableGrailsDomainClassCompassClassMapper.java:93)
        at grails.plugin.searchable.internal.compass.mapping.AbstractSearchableGrailsDomainClassCompassClassMapper.getCompassClassMapping(AbstractSearchableGrailsDomainClassCompassClassMapper.java:52)
        at grails.plugin.searchable.internal.compass.config.mapping.SearchableClassPropertySearchableGrailsDomainClassMappingConfigurator.configureMappings(SearchableClassPropertySearchableGrailsDomainClassMappingConfigurator.java:80)
        at grails.plugin.searchable.internal.compass.config.DefaultGrailsDomainClassMappingSearchableCompassConfigurator.configure(DefaultGrailsDomainClassMappingSearchableCompassConfigurator.java:131)
        at grails.plugin.searchable.internal.compass.config.CompositeSearchableCompassConfigurator.configure(CompositeSearchableCompassConfigurator.java:39)
        at grails.plugin.searchable.internal.compass.spring.SearchableCompassFactoryBean.buildCompass(SearchableCompassFactoryBean.java:93)
        at grails.plugin.searchable.internal.compass.spring.SearchableCompassFactoryBean.getObject(SearchableCompassFactoryBean.java:58)
        ... 29 more

Answer 1

这是一个已知问题。流行的解决方法要么不映射 hasMany 字段（如您所提到的），要么在 save(flush:true) 之前在对象实例上使用 merge(flush:true) ) 被调用。我发现不映射 hasMany 字段会更有效，也不会那么麻烦，因为使用 merge(flush:true) 在某些情况下会导致重复的对象，并且还需要您手动维护搜索索引。 此处了解有关该问题的更多信息。