实现接口函数时，Struct字段不更新

本文介绍了实现接口函数时，Struct字段不更新的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！ 问题描述 如果我们有以下接口： type IRoute interface { AddChildren（child IRoute）$ $ b $ p $ b 以下结构： 类型路由结构{别名字符串`json：别名`` Children [] Route`json：children，omitempty` Url字符串`json：url，omitempty`} 并实现了接口： func（This Route）AddChildren（child globals.IRoute）{ this.Children = append（this.Children， （Route））} 然后在我们的主要函数中，如果我们想要测试这是行不通的： rSettings：= Route {settings，nil，/ admin / settings} rSettingsContentTypesNew：= models.Route {new，nil，/ new？type& parent} rSettingsContentTypesEdit：= models.Route {edit，nil，/ edit /：nodeId} //不工作 - 没有孩子被添加 rSettingsContentTypes.AddChildren（rSettingsContentTypesNew） rSettingsContentTypes.AddChildren（rSettingsContentTypesEdit） rSettings.AddChildren（rSettingsContentTypes） $ $ b rSettings：= Route {settings，nil，/ b $ b admin / settings} rSettingsContentTypesNew：= models.Route {new，nil，/ new？type& parent} rSettingsContentTypesEdit：= models.Route {edit，nil，/编辑/：nodeId} //然而，这确实有效 rSettingsContentTypes.Children = append（rSettingsContentTypes.Children，rSettingsContentTypesNew） rSettingsContentTypes.Children = append（rSettingsContentTypes.Children ，rSettingsContentTypesEdit） rSettings.Children = append（rSettings.Children，rSettingsContentTypes） 什么是我错过了？ ： 是一个值，因此您正在更改 Route 结构的副本。 更改它到 func（this * Route）AddChildren（child globals.IRoute） If for example we have the following interface:type IRoute interface { AddChildren(child IRoute)}The following struct:type Route struct { Alias string `json:"alias"` Children []Route `json:"children,omitempty"` Url string `json:"url,omitempty"`}And implemented the interface:func (this Route) AddChildren (child globals.IRoute){ this.Children = append(this.Children, child.(Route))}Then in our main func, if we wanted to test this it would not work:rSettings := Route{"settings", nil, "/admin/settings"}rSettingsContentTypesNew := models.Route{"new", nil, "/new?type&parent"}rSettingsContentTypesEdit := models.Route{"edit", nil, "/edit/:nodeId"}// Does NOT work - no children is addedrSettingsContentTypes.AddChildren(rSettingsContentTypesNew)rSettingsContentTypes.AddChildren(rSettingsContentTypesEdit)rSettings.AddChildren(rSettingsContentTypes)And this does work as expected:rSettings := Route{"settings", nil, "/admin/settings"}rSettingsContentTypesNew := models.Route{"new", nil, "/new?type&parent"}rSettingsContentTypesEdit := models.Route{"edit", nil, "/edit/:nodeId"}// However this does indeed workrSettingsContentTypes.Children = append(rSettingsContentTypes.Children,rSettingsContentTypesNew)rSettingsContentTypes.Children = append(rSettingsContentTypes.Children,rSettingsContentTypesEdit)rSettings.Children = append(rSettings.Children,rSettingsContentTypes)What am I missing? :-) 解决方案 The receiver of func (this Route) AddChildren (child globals.IRoute) is a value, so you are changing a copy of your Route struct.Change it to func (this *Route) AddChildren (child globals.IRoute) 这篇关于实现接口函数时，Struct字段不更新的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！