Nullify

Returns the pointer version of any input recursively including e.g. field structs (while retaining tags). This is especially useful in e.g. JSON serialization/deserialization in combination with a struct validator to check if a field was sent or not without changing the struct.

Install

Use github.com/Emptyless/nullify to download the latest version.

Example

To quickly get up and running, run e.g. the following:

package main
import (
"encoding/json""fmt""github.com/go-playground/validator/v10"
)
typePersonstruct {
Namestring`json:"name" validate:"required"`
}
funcmain() {
input:= []byte("")
person:=Person{}
p:=Nullify(person)
_=json.Unmarshal(input, p)
err:=validator.New().Struct(p)
fmt.Println(err)
// Output:// Key: 'Name' Error:Field validation for 'Name' failed on the 'required' tag
}

For the full example, see /example for an example with go-playground/validator.