support example tag on slice field.

[laushunyu]

code:

type WantExample struct {
	A string   `json:"a" example:"example of a"`
	B []string `json:"b" example:"example of b‘s item"`
}

func main() {
	reflector := jsonschema.Reflector{}
	schema, err := reflector.Reflect(WantExample{})
	if err != nil {
		log.Fatal(err)
	}

	j, err := json.MarshalIndent(schema, "", " ")
	if err != nil {
		log.Fatal(err)
	}

	fmt.Println(string(j))
}

output: ( there is no example on field "b")

{
 "properties": {
  "a": {
   "examples": [
    "example of a"
   ],
   "type": "string"
  },
  "b": {
   "items": {
    "type": "string"
   },
   "type": [
    "array",
    "null"
   ]
  }
 },
 "type": "object"
}

wanted:

{
 "properties": {
  "a": {
   "examples": [
    "example of a"
   ],
   "type": "string"
  },
  "b": {
   "items": {
    "type": "string",
    "example": "example of b's item"
   },
   "type": [
    "array",
    "null"
   ]
  }
 },
 "type": "object"
}

[vearutop]

Interesting, looks like a bug, let me check in details.

[vearutop]

But also regarding your expectations, example is applied to the property, so in this case it won't be

  "b": {
   "items": {
    "type": "string",
    "example": "example of b's item"
   },
   "type": [
    "array",
    "null"
   ]
  }

but rather something like

  "b": {
  "examples": ["example of b"]
  "items": {
   "type": "string",
  },
  "type": [
   "array",
   "null"
  ]
 }

[laushunyu]

better, looking forward to a new tag. thx

[vearutop]

Please check test for an example of example. 🙃

https://github.com/swaggest/jsonschema-go/blob/v0.3.38/reflect_test.go#L1279