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package utils
import "gorm.io/gorm"
//分页封装
func Paginate(page int, pageSize int) func(db *gorm.DB) *gorm.DB {
return func(db *gorm.DB) *gorm.DB {
if page == 0 {
page = 1
}
switch {
case pageSize > 100:
pageSize = 100
case pageSize <= 0:
pageSize = 10
}
offset := (page - 1) * pageSize
return db.Offset(offset).Limit(pageSize)
}
}
type PageData struct {
Page int64
PageSize int64
TotalCount int64
TotalPage int64
Data interface{}
}
func GetPageData(page, pageSize, total int64) (int64, int64, PageData) {
if page <= 0 {
page = 1
}
if pageSize <= 0 {
pageSize = 10
}
var pageData PageData
pageData.Page = page
pageData.PageSize = pageSize
pageData.TotalCount = total
pageData.TotalPage = total / pageSize
if total%pageSize > 0 {
pageData.TotalPage += 1
}
if page > pageData.TotalPage {
page = pageData.TotalPage
pageData.Page = page
}
start := pageSize * (page - 1)
if start < 0 {
start = 0
}
return pageSize, start, pageData
}