我正在尝试使用Go接口编写一个通用模块。这会导致错误：
panic: interface conversion: interface {} is main.AmazonOrder, not main.OrderMapper
法典：
package main
type AmazonOrder struct {
OrderId string
ASIN string
}
func (o AmazonOrder) Generalise() *Order {
return &Order{
ChannelOrderId: o.OrderId,
}
}
type EbayOrder struct {
OrderId string
SKU string
}
func (o EbayOrder) Generalise() *Order {
return &Order{
ChannelOrderId: o.OrderId,
}
}
type Order struct {
ID string
ChannelOrderId string
}
type OrderMapper struct {
Generalise func() *Order
}
var orderFactory = map[string]func() interface{} {
"amazon": func() interface{} {
return AmazonOrder{}
},
"ebay": func() interface{} {
return EbayOrder{}
},
"vanilla": func() interface{} {
return Order{}
},
}
func main() {
orderType := "amazon"
initialiseOrder := orderFactory[orderType]
anOrder := initialiseOrder()
// Unmarshal from json into anOrder etc.. here.
theOrder := anOrder.(OrderMapper).Generalise()
println(theOrder.ChannelOrderId)
}
在简单的视线逻辑中，这应该工作正常。但是，我肯定误解了Go中的类型转换。TIA用于澄清它是什么。
游乐场： https://play.golang.org/p/tHCzKGzEloL
阿晨1998
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