Codebase list golang-github-go-playground-validator-v10 / 946d444
Add custom validation example Dean Karn 6 years ago
1 changed file(s) with 39 addition(s) and 0 deletion(s). Raw diff Collapse all Expand all
+39
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_examples/custom-validation/main.go less more
0 package main
1
2 import (
3 "fmt"
4
5 "gopkg.in/go-playground/validator.v9"
6 )
7
8 // MyStruct ..
9 type MyStruct struct {
10 String string `validate:"is-awesome"`
11 }
12
13 // use a single instance of Validate, it caches struct info
14 var validate *validator.Validate
15
16 func main() {
17
18 validate = validator.New()
19 validate.RegisterValidation("is-awesome", ValidateMyVal)
20
21 s := MyStruct{String: "awesome"}
22
23 err := validate.Struct(s)
24 if err != nil {
25 fmt.Printf("Err(s):\n%+v\n", err)
26 }
27
28 s.String = "not awesome"
29 err = validate.Struct(s)
30 if err != nil {
31 fmt.Printf("Err(s):\n%+v\n", err)
32 }
33 }
34
35 // ValidateMyVal implements validator.Func
36 func ValidateMyVal(fl validator.FieldLevel) bool {
37 return fl.Field().String() == "awesome"
38 }