santhosh-tekuri/jsonschema

validating []string{} gives invalid jsonType: []string

nachtwerk opened this issue · 2 comments

nachtwerk commented

My application uses jsonschema to validate some user provided values, one of them being a multi-select field. The incoming data is being decoded into a []string{} but passing that as an interface returns a invalid jsonType?

Example with schema included:

package main

import (
	"fmt"
	"strings"

	"github.com/santhosh-tekuri/jsonschema"
)

func main() {
	schema := `{"type": "array", "items": {"type": "string", "enum": ["Digital", "Radio", "TV"]}}`
	value := []string{"TV"}

	err := validate(schema, value)
	if err != nil {
		fmt.Println(err)
	}
}

func validate(schemaString string, value interface{}) error {
	compiler := jsonschema.NewCompiler()

	if err := compiler.AddResource("obj.json", strings.NewReader(schemaString)); err != nil {
		return err
	}

	schema, err := compiler.Compile("obj.json")
	if err != nil {
		return err
	}

	return schema.ValidateInterface(value)
}

If I am doing something wrong, please guide me to the correct docs to handle this (if the exist, I couldnt find examples)

santhosh-tekuri commented

You have to use '[]interface{}' instead of '[]string'