我正在尝试修改 Go 中嵌套结构变量的值。基本上,我想修改RsvpString属性,但GetRsvp()似乎返回值Rsvp而不是引用,因此当我修改其属性值时,它不会反映在实例中Event。
测试如下。
type Event struct {
Rsvps []Rsvp `json:"rsvps"`
}
type Rsvp struct {
UserId string `json:"userId"`
RsvpString string `json:"rsvp"`
}
func (e *Event) GetRsvp(userId string) (rsvp *Rsvp, err error) {
for _, element := range e.Rsvps {
if element.UserId == userId {
return &element, nil
}
}
return &Rsvp{}, fmt.Errorf("could not find RSVP based on UserID")
}
func (e *Event) UpdateExistingRsvp(userId string, rsvpString string) {
rsvp, err := e.GetRsvp(userId)
if err == nil {
rsvp.RsvpString = rsvpString
}
}
这是测试代码:
func TestEvent_UpdateExistingRsvp(t *testing.T) {
e := Event{[]Rsvp{
{Name: "Bill",
UserId: "bill",
Rsvp: "yes"}}}
e.UpdateExistingRsvp("bill", "no")
assert.Equal(t, "no", e.Rsvps[0].Rsvp, "RSVP should be switched to no") // fails
}
倚天杖
Helenr
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