英文:
interface conversion panic when method is not actually missing
问题
在运行时，我得到了以下的panic消息，尽管在我看来，该方法已经正确地定义在实现该接口的结构体中。
panic: interface conversion: schema.MerchantResultset
is not search.ResultsetInterface: missing method Add
这是接口的蓝图：
type ResultsetInterface interface {
Init(string)
CacheSet(context.Context) error
CacheSetPart(context.Context, int) error
CacheGet(context.Context, string) error
Add(interface{})
AddResultset(interface{})
}
以下是在运行时报告为缺失的方法，该方法被分配给了我的结构体MerchantResultset。
func (mr *MerchantResultset) Add(item interface{}) {
mr.Data = append(mr.Data, item.(Merchant))
}
我对于实际需要的东西感到非常困惑。
英文:
Somehow, at runtime, I am getting the following panic message, even if it appears to me the method is properly defined to the struct that implements that interface.
panic: interface conversion: schema.MerchantResultset
is not search.ResultsetInterface: missing method Add
This is the interface blueprint
type ResultsetInterface interface {
Init(string)
CacheSet(context.Context) error
CacheSetPart(context.Context, int) error
CacheGet(context.Context, string) error
Add(interface{})
AddResultset(interface{})
}
The following is the method that is reported missing during runtime, which is assigned to my struct MerchantResultset.
func (mr *MerchantResultset) Add(item interface{}) {
mr.Data = append(mr.Data, item.(Merchant))
}
I am somehow very puzzled trying to understand what is actually being needed here
答案1
得分: 23
可能是因为你正在传递一个MerchantResultset，但Add方法只定义在该类型的指针上。
英文:
Probably it’s because you are passing around a MerchantResultset, but the Add method is only defined for a pointer to that type.
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