添加数据库分页的工具

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
+}