我一直在使用 2 個由OpenAPI 生成器在單獨的包中生成的 SDK，它們共享在不同包中重復的相同代碼foo，bar：package foo// there's the exact same piece of code under another package bar// GenericOpenAPIError Provides access to the body, error and model on returned errors.type GenericOpenAPIError struct { ... model interface{}}// Model returns the unpacked model of the errorfunc (e GenericOpenAPIError) Model() interface{} { return e.model}// Failure Provides information about problems encountered while performing an operation.type Failure struct { // List of errors which caused this operation to fail Errors []Error `json:"errors"`}// GetErrors returns the Errors field valuefunc (o *Failure) GetErrors() []Error {...}// Error Describes a particular error encountered while performing an operation.type Error struct { ... // A human-readable explanation specific to this occurrence of the problem. Detail *string `json:"detail,omitempty"` ...}另外，有一個應用程序，我在其中使用了兩個 SDK：，并從錯誤列表foo中bar提取了第一個錯誤，我在其中嘗試將錯誤轉換為每個 SDK 的錯誤類型，因此必須復制代碼。1.18有沒有一種方法可以使用支持泛型的方法來簡化它？
1 回答
Cats萌萌
TA貢獻1805條經驗 獲得超9個贊
您可以更改mainErrorModel為struct with no pointer帶有類型斷言，然后將該結構更改為struct with pointer，最后您可以再次更改為Failure帶有類型斷言的類型接口。
這是例子。
// You can edit this code!
// Click here and start typing.
package main
import (
"fmt"
)
type GenericOpenAPIError interface {
Model() any
}
type Failure interface {
GetErrors() string
}
type GenericOpenAPI struct {
model any
}
func (g *GenericOpenAPI) Model() any {
return g.model
}
func (g *GenericOpenAPI) Error() string {
return "goae error"
}
type A struct {
b string
}
func (a *A) GetErrors() string {
return a.b
}
type B struct {
c string
}
func (b *B) GetErrors() string {
return b.c
}
type GetErrores interface {
A | B
}
func getErrorMessage[T GetErrores](err error) string {
if mainError, ok1 := err.(GenericOpenAPIError); ok1 {
var mainErrorModel = mainError.Model()
if t, ok := mainErrorModel.(T); ok {
if f, ok := any(&t).(Failure); ok { // must change &t to any then type assert to Failure to tell app that there is a method GetErrors()
return f.GetErrors()
}
}
}
return err.Error()
}
func main() {
var err any
err = &GenericOpenAPI{A{b: "this is error a"}}
e, ok := err.(error)
if !ok {
panic("not ok!")
}
fmt.Println(getErrorMessage[A](e))
// change model to B
err = &GenericOpenAPI{B{c: "this is error b"}}
e, ok = err.(error)
if !ok {
panic("not ok!")
}
fmt.Println(getErrorMessage[B](e))
}
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