Using or in bind and validation? - go

Question

I'm using go gin with validation package called ozzo-validation and when I bind json data and validation error like this:
err := c.ShouldBind(&user)
valErrors := user.LoginValidate()
if err != nil || valErrors != nil {
util.ErrorJSON(c, http.StatusBadRequest, err.Error())
return
}
I got errors in console:
/usr/local/go/src/net/http/server.go:2878 +0x43b
net/http.(*conn).serve(0xc0002cebe0, {0x17430c0, 0xc0004a6f30})
/usr/local/go/src/net/http/server.go:1929 +0xb08
created by net/http.(*Server).Serve
/usr/local/go/src/net/http/server.go:3033 +0x4e8
when I convert the above code to the following it works!
var user models.User
// Decode request data
if err := c.ShouldBind(&user); err != nil {
util.ErrorJSON(c, http.StatusBadRequest, err.Error())
return
}
// Validate Error
if err := user.LoginValidate(); err != nil {
util.ErrorJSON(c, http.StatusBadRequest, err.Error())
return
}

Answer 1

what is variable user? is it a model? why don't you declare validation on your model with validatin-ozzo like :
func (f *user) Validate() error {
if err := validation.Validate(f.name, validation.Required); err != nil {
return &response.ErrorResponse{
ErrorID: 422,
Msg: map[string]string{
"en": "name cannot be empty",
},
}
}
return nil
}
type ErrorResponse struct {
ErrorID int `json:"error_id"`
Msg map[string]string `json:"message"`
}
func (c *ErrorResponse) Error() string {
b, _ := json.Marshal(c)
return string(b)
}
// and validate it on your code like :
if err := user.Validate(); err != nil {
return nil, err
}