refactor: service module and dao module

server/dao/common.go

@@ -1,5 +1,11 @@
 package dao
 
+import (
+	"context"
+	"crm/global"
+	"crm/models"
+)
+
 const (
 
 	// 数据库表名
@@ -15,3 +21,20 @@ const (
 	NumberNull = 0
 	StringNull = ""
 )
+
+var ctx = context.Background()
+
+// RestPage 分页查询
+// page  设置起始页、每页条数,
+// name  查询目标表的名称
+// query 查询条件,
+// dest  查询结果绑定的结构体,
+// bind  绑定表结构对应的结构体
+func restPage(page models.Page, name string, query interface{}, dest interface{}, bind interface{}) (int64, error) {
+	if page.PageNum > 0 && page.PageSize > 0 {
+		offset := (page.PageNum - 1) * page.PageSize
+		global.Db.Offset(offset).Limit(page.PageSize).Table(name).Where(query).Find(dest)
+	}
+	res := global.Db.Table(name).Where(query).Find(bind)
+	return res.RowsAffected, res.Error
+}