//psot接受传递的参数，post receives the passed parameters,
	type postParam struct {
		Img     []string `json:"img"`
		Content string   `json:"content" binding:"required"`
	}
	var param postParam
	if err := c.ShouldBindJSON(&param); err != nil {
		utils.ReturnData(c, http.StatusOK, map[string]interface{}{
			"response": fail(""),
		})
		return
	}
//Convert to json array
img_json, _ := json.Marshal(param.Img)
//save to database，保存到数据库
type AddDynamic struct {
	ID         int    `json:"id"`
	Img        string `gorm:"column:img" json:"img"`
}
	var addDynamic models.AddDynamic
	addDynamic.Img = string(img_json)
	models.Db.Create(&addDynamic)