41 lines
895 B
Go
41 lines
895 B
Go
package responsex
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import "math"
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type Pagination struct {
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Page int64 `json:"page"`
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Size int64 `json:"size"`
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TotalPage int64 `json:"total_page"`
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TotalCount int64 `json:"total_count"`
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}
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// 计算DB分页偏移量
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// page/size 小于等于 0 时取默认值（page=1，size=10），保证 offset/limit 永远合法
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func GetOffset(page, size int) (offset int, limit int) {
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if page <= 0 {
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page = 1
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}
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if size <= 0 {
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// 默认查10条
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size = 10
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}
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offset = (page - 1) * size
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limit = size
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return
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}
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// 计算响应分页
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// size 小于等于 0 时不做除法，避免出现负数总页数
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func GetPage(page, size, totalCount int64) Pagination {
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pa := Pagination{}
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var totalPage int64
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if size > 0 {
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totalPage = int64(math.Ceil(float64(totalCount) / float64(size)))
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}
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pa.Page = page
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pa.Size = size
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pa.TotalPage = totalPage
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pa.TotalCount = totalCount
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return pa
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}
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