Question

将命令注入命名空间的Controller始终解析为最高版本的服务，无论Controller中声明的命名空间如何。

    package com.vertest.v1
    class VertestController {
        static namespace = 'v1'
        def vertestService
        def agateSer() {
            render vertestService.agate()
        }
    }
    package com.vertest.v1
    class VertestService {
        def agate() {
            this.getClass().getName()
        }
    }

    package com.vertest.v2
    class VertestController {
        static namespace = 'v2'
        def vertestService
        def agateSer() {
            render vertestService.agate()
        }
    }
    package com.vertest.v2
    class VertestService {
        def agate() {
            this.getClass().getName()
        }
    }

UrlMappings.groovy

    "/v1/agateservice"(controller:"vertest", action:"agateSer", namespace:"v1")
    "/v2/agateservice"(controller:"vertest", action:"agateSer", namespace:"v2")

v1 VertestController解析为v2 VertestService：

    http://localhost:8080/worklists/v1/agateservice > com.iii.worklists.v2.VertestService
    http://localhost:8080/worklists/v2/agateservice > com.iii.worklists.v2.VertestService

也许有一种方法可以强制v1 VertestController使用v1 VertestService;修改v1 VertestController以声明一个完全限定的VertestService：

    package com.vertest.v1
    class VertestController {
        static namespace = 'v1'
        com.vertest.v1.VertestService vertestService = new com.vertest.v1.VertestService()
        def agateSer() {
            render vertestService.agate()
        }
    }

哎哟！编译错误：

    Error creating bean with name 'com.iii.worklists.v1.VertestController': Initialization of bean failed; nested exception is org.springframework.beans.ConversionNotSupportedException: Failed to convert property value of type 'com.iii.worklists.v2.VertestService' to required type 'com.iii.worklists.v1.VertestService' for property 'vertestService'; nested exception is java.lang.IllegalStateException: Cannot convert value of type [com.iii.worklists.v2.VertestService] to required type [com.iii.worklists.v1.VertestService] for property 'vertestService': no matching editors or conversion strategy found

将v1控制器与v1服务关联的首选方法是什么？

Answer 1

应用程序不支持定义具有相同名称的2个服务，即使它们位于不同的包中。这样做的问题是它们都具有相同的bean名称。当不同插件提供具有相同名称的服务时，框架中存在处理此问题的机制，但这与在应用程序中定义它们不同，框架只是不支持。

如何在Grails 2.3.6中将命名空间控制器与相同打包的服务相关联？

1 个答案: