英文:
How to share embedded struct pointer
问题
我有以下代码：
一个名为controller的结构体，其中包含匿名字段。
type controller struct {
*base.Controller
store *data
}
如你所见，*base.Controller 是一个匿名字段指针。然后有一个第二个结构体，也由 *base.Controller 组成。
type expiredError struct {
*base.Controller
local string
}
我按照以下方式初始化了controller结构体：
c := &controller{base.New(rw, r, false, "controller/account"), nil}
c.Title = "Activate account"
c.serve()
controller上的base.Controller 是通过base.New() 函数进行初始化的。
现在我有一个controller方法，它初始化了expiredError结构体，并且它应该共享base.Controller的指针给expiredError的base.Controller。
func (rcv *controller) validate() error {
....
// 如果激活帐户的时间已过期
if time.Now().Unix() > rcv.store.Expired {
// 从neo4j中删除已注册的用户
maccount.Delete(rcv.store.Email, rcv.Local)
return &expiredError{base.Controller, rcv.Local}
}
return nil
}
我在这里遇到了一个编译错误：
type base.Controller is not an expression
英文:
I have following code:
A struct controller, that have anonymous fields.
type controller struct {
*base.Controller
store *data
}
As you can see, *base.Controller is anonymous fields pointer.
Then a second struct that composed with *base.Controller too.
type expiredError struct {
*base.Controller
local string
}
I initialized the controller struct as follow:
c := &controller{base.New(rw, r, false, "controller/account"), nil}
c.Title = "Activate account"
c.serve()
The base.Controller on controller is initialize with base.New() function.
Now I have on controller methods, that initialize the expiredError struct and it should share the pointer of base.Controller to base.Controller of expiredError too.
func (rcv *controller) validate() error {
....
// If time for activating account is expired
if time.Now().Unix() > rcv.store.Expired {
// Delete registered user from neo4j
maccount.Delete(rcv.store.Email, rcv.Local)
return &expiredError{base.Controller, rcv.Local}
}
return nil
}
I've got here a compiler error
type base.Controller is not an expression
答案1
得分: 3
你可以通过提及父类的实例来引用匿名字段：
rcv.Controller
（因为匿名字段的“名称”与字段的类型相同）
在以下类似的示例中可以看到：
英文:
You can try referencing the anonymous field by mentioning the instance of the parent class:
rcv.Controller
(since the "name" of an anonymous field is the same as the type of the field)
See a similar example in:
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