From de243040657ed8fa6a3931a988cf995e07d472c9 Mon Sep 17 00:00:00 2001
From: Yun <yun@yun.ink>
Date: Fri, 19 Apr 2024 09:18:37 +0800
Subject: [PATCH] =?UTF-8?q?=E6=B7=BB=E5=8A=A0=E6=95=B0=E6=8D=AE=E5=BA=93?=
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---
 utils.go | 38 ++++++++++++++++++++++++++++++++++++++
 1 file changed, 38 insertions(+)
 create mode 100644 utils.go

diff --git a/utils.go b/utils.go
new file mode 100644
index 0000000..04b0867
--- /dev/null
+++ b/utils.go
@@ -0,0 +1,38 @@
+package gormx
+
+import "gorm.io/gorm"
+
+// 计算DB的分页
+func GetDbOffset(db *gorm.DB, page, size int64) *gorm.DB {
+	offset := int(0)
+	limit := int(0)
+	if page <= 0 && size <= 0 {
+		// 最大可找1000条
+		limit = 1000
+	} else {
+		if page <= 0 {
+			page = 1
+		}
+		if size <= 0 {
+			size = 10
+		}
+		offset = int((page - 1) * size)
+		limit = int(size)
+	}
+
+	return db.Offset(offset).Limit(limit)
+}
+
+// 分页查询
+func GetOffset(page, size int) (offset int, limit int) {
+	if page <= 0 {
+		page = 1
+	}
+	offset = (page - 1) * size
+	limit = size
+	if limit == 0 {
+		// 默认查10条
+		limit = 10
+	}
+	return
+}