golang-gin-with-dynamic-json

This repository is for use gin framework to serve dynamic web page

architecture

handle pagination with gorm middleware format

func Paginate(ctx *gin.Context) func(db *gorm.DB) *gorm.DB {
	return func(db *gorm.DB) *gorm.DB {
		pageStr := ctx.DefaultQuery("page", "1")
		page, _ := strconv.Atoi(pageStr)
		if page <= 0 {
			page = 1
		}
		pageSizeStr := ctx.DefaultQuery("page_size", "10")
		pageSize, _ := strconv.Atoi(pageSizeStr)
		switch {
		case pageSize > 100:
			pageSize = 100
		case pageSize <= 0:
			pageSize = 10
		}
		dbClone := db.Session(&gorm.Session{})
		var total int64
		dbClone.Count(&total)
		totalPages := int(math.Ceil(float64(total) / float64(pageSize)))
		ctx.Set("page", page)
		ctx.Set("pageSize", pageSize)
		ctx.Set("totalPages", totalPages)
		offset := (page - 1) * pageSize
		return db.Offset(offset).Limit(pageSize)
	}
}