querystruct

type Product struct {
	ID    int    `json:"id"`
	Name  string `json:"name"`
	Price int    `json:"price"`
	Tag   string `json:"tag"`
}

type ProductQuery struct {
	Page     int    `query:"page"`
	PageSize int    `query:"page_size"`
	Sort     string `query:"sort"`
	Tag      string `query:"tag"`
}