golang json returns null

使用struct{}{}返回空对象

func OkReply(c *app.RequestContext) {
    
	c.JSON(200, CommonResult{
    
		Data:    struct{
    }{
    },
		Code:    ErrCode_None,
		Message: "ok",
	})
}

返回json

{
    
	"data":{
    },
	"code":0,
	"message":"ok"
}

使用make([]interface{}, 0)返回空数组

func OkReply(c *app.RequestContext) {
    
	c.JSON(200, CommonListResult{
    
		List:    make([]interface{
    }, 0),
		Code:    ErrCode_None,
		Message: "ok",
	})
}

返回json

{
    
	"data":[],
	"code":0,
	"message":"ok"
}