golang 版本:1.18.3
验证器:github.com/go-playground/validator/v10
我想在加载到嵌套结构数据结构后验证传入的 JSON 负载。这是我传入的 JSON 负载,
{
"name": "Duro",
"gender": "MALE",
"tier": 3,
"mobileNumber": "0356874586",
"address": {
"city": "Tokyo",
"street": "Shibaura St"
},
"children":[
{
"title": "Mr",
"lastName": "Takayashi"
}
],
"isEmployed": false,
"requestedAt": "2022-01-10T03:30:12.639Z"
}
这是我的 user.go 文件,
package main
type User struct {
Name string `validate:"required"`
Gender string `validate:"required,oneof=MALE FEMALE"`
Tier *uint8 `validate:"required,eq=0|eq=1|eq=2|eq=3"`
MobileNumber string `validate:"required"`
Email string
Address *Address `validate:"required"`
Children []Child `validate:"required,dive"`
IsEmployed *bool `validate:"required"`
PreferredContactMethod string `validate:"oneof=EMAIL PHONE POST SMS"`
RequestedAt time.Time `validate:"required"`
}
type Address struct {
City string `validate:"required"`
Street string `validate:"required"`
}
type Child struct {
Title string `validate:"required"`
FirstName string
LastName string `validate:"required"`
}
这是我的测试函数
func TestUserPayload(t *testing.T) {
validate := validator.New()
var u User
err := json.Unmarshal([]byte(jsonData), &u)
if err != nil {
panic(err)
}
err := validate.Struct(&u)
if err != nil {
t.Errorf("error %v", err)
}
}
此测试因错误而失败,
error Key: 'User.PreferredContactMethod' Error:Field validation for 'PreferredContactMethod' failed on the 'oneof' tag
发生这种情况是因为 Go 将空字符串分配给 User.PreferredContactMethod 结构字段。由于 PreferredContactMethod
不是必填字段,我不想在 json 有效负载没有此验证错误时看到它。
当 json 负载没有 preferredContactMethod
字段时,如何避免出现此错误消息?
如果您有更好的替代方案来实现此验证,也很高兴听到它们。
最佳答案
利用 omitempty
和 oneof
使验证器库忽略空值或未设置的值。
type User struct {
Name string `validate:"required"`
Gender string `validate:"required,oneof=MALE FEMALE"`
Tier *uint8 `validate:"required,eq=0|eq=1|eq=2|eq=3"`
MobileNumber string `validate:"required"`
Email string
Address *Address `validate:"required"`
Children []Child `validate:"required,dive"`
IsEmployed *bool `validate:"required"`
PreferredContactMethod string `validate:"omitempty,oneof=EMAIL PHONE POST SMS"`
RequestedAt time.Time `validate:"required"`
}
关于json - 戈朗 : Validate Struct field of type string to be one of specific values,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/72914728/