[FEATURE]: Go validator tags support

[timsofteng]

It would be great if quicktype produce validate tags for go structures.

Input Format: JSONSchema
Output Language: go

Description

Unfortunately in go there are no way add validation tags to json without external library. The most popular library currently is validator from google (https://github.com/go-playground/validator). It will give an abillity to validate json data in go applications.

Current Behaviour / Output

This json schema

{
  "id": "http://json-schema.org/geo",
  "$schema": "http://json-schema.org/draft-06/schema#",
  "description": "A geographical coordinate",
  "type": "object",
  "properties": {
    "latitude": {
      "type": "number",
      "minLength": 5
    },
    "ll": {
      "type": "number",
      "minLength": 5
    },
    "longitude": {
      "type": "number"
    }
  }
}

will be generated into this go struct

type Coordinate struct {
	Latitude  *float64 `json:"latitude,omitempty"`
	Ll        *float64 `json:"ll,omitempty"`
	Longitude *float64 `json:"longitude,omitempty"`
}

Proposed Behaviour / Output

This json schema

{
  "id": "http://json-schema.org/geo",
  "$schema": "http://json-schema.org/draft-06/schema#",
  "description": "A geographical coordinate",
  "type": "object",
  "properties": {
    "latitude": {
      "type": "number",
      "minLength": 5
    },
    "ll": {
      "type": "number",
      "minLength": 5
    },
    "longitude": {
      "type": "number"
    }
  }
}

will be generated into this go struct

type Coordinate struct {
	Latitude  *float64 `json:"latitude,omitempty" validate:"min=5"`
	Ll        *float64 `json:"ll,omitempty", validate:"min=5"`
	Longitude *float64 `json:"longitude,omitempty"`
}

Solution

Alternatives

Context