# README
介绍
基于sqlx库，封装了实体对象的基本CRUD方法，除数据库读写外，还实现了自定义缓存机制，在数据库读写过程中，自动使用和更新缓存
样例代码见example.go内
Struct Tag
type User struct {
ID int64 `db:"user_id" entity:"primaryKey,autoIncrement"`
CreateAt int64 `db:"create_at" entity:"refuseUpdate"`
UpdateAt int64 `db:"update_at"`
Other bool `db:"other" entity:"deprecated"`
}
每个字段属性，必须声明db，否则不会作为字段对待
实体配置，写在entity内
可用tag:
primaryKey主键字段，每个实体对象至少要声明一个refuseUpdate不允许更新，UPDATE时会被忽略autoIncrement自增长主键，构造INSERT时此字段会被忽略returning如果数据库支持RETURNING特性，构造INSERT和UPDATE是，此字段的结果会放在RETURNING子句内返回deprecated标记为废弃，构造CRUD查询时会被忽略掉
# Packages
No description provided by the author
# Functions
Delete 删除entity.
DeleteCache 删除entity缓存.
Insert 插入新entity.
Load 从数据库载入entity.
NewMetadata 构造实体对象元数据.
SaveCache 保存entity缓存.
Update 更新entity.
# Constants
EventAfterDelete after delete entity.
EventAfterInsert after insert entity.
EventAfterUpdate after update entity.
EventBeforeDelete before delete entity.
EventBeforeInsert before insert entity.
EventBeforeUpdate before update entity.
EventUnknown 未定义事件.
# Variables
DefaultCacher 默认缓存存储.
ReadTimeout 读取entity数据的默认超时时间.
WriteTimeout 写入entity数据的默认超时时间.
# Type aliases
Event 存储事件.