GORM Golang操作MySQL数据库 数据类型对应关系和表属性
package main
import (
"fmt"
"gorm.io/driver/mysql"
"gorm.io/gorm"
"log"
)
var db *gorm.DB
func main() {
// 设置数据库
const (
UserName = "UserName"
Password = "Password"
URL = "127.0.0.1:3306"
DatabaseName = "testgorm"
)
dsn := fmt.Sprintf("%s:%s@tcp(%s)/%s?charset=utf8mb4&parseTime=True&loc=Local",
UserName, Password, URL, DatabaseName) // DSN data source name
var err error
db, err = gorm.Open(mysql.Open(dsn), &gorm.Config{})
if err != nil {
log.Fatalln(err)
}
type Node struct {
gorm.Model
Bool bool
Int int
Uint uint
Int8 int8
Uint8 uint8
Byte byte
Int32 int32
Rune rune
Uint32 uint32
Int64 int64
Uint64 uint64
Float32 float32
Float64 float64
String string
}
// 创建表时添加后缀
// 默认值：ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_0900_ai_ci
err = db.Set("gorm:table_options",
"ENGINE=MyISAM DEFAULT CHARSET=utf8 COLLATE=utf8_bin ROW_FORMAT=Dynamic").
AutoMigrate(&Node{})
}
实际执行的操作
CREATE TABLE `nodes` (
`id` bigint unsigned AUTO_INCREMENT,
`created_at` datetime(3) NULL,
`updated_at` datetime(3) NULL,
`deleted_at` datetime(3) NULL,
`bool` boolean,`int` bigint,
`uint` bigint unsigned,
`int8` tinyint,
`uint8` tinyint unsigned,
`byte` tinyint unsigned,
`int32` int,`rune` int,
`uint32` int unsigned,
`int64` bigint,
`uint64` bigint unsigned,
`float32` float,
`float64` double,
`string` longtext,
PRIMARY KEY (`id`),
INDEX idx_nodes_deleted_at (`deleted_at`)
)ENGINE=MyISAM DEFAULT CHARSET=utf8 COLLATE=utf8_bin ROW_FORMAT=Dynamic
mysql> show create table nodes;
+-------+-----------------------------------------------------------------------------------------------------------------------------------
--------------------------------------------------------------------------------------------------------------------------------------------
--------------------------------------------------------------------------------------------------------------------------------------------
--------------------------------------------------------------------------------------------------------------------------------------------
--------------------------------------------------------------------------------------------------------------------------------------------
-----------------------------------------------------------------------------------------------------------------------------+
| Table | Create Table
|
+-------+-----------------------------------------------------------------------------------------------------------------------------------
--------------------------------------------------------------------------------------------------------------------------------------------
--------------------------------------------------------------------------------------------------------------------------------------------
--------------------------------------------------------------------------------------------------------------------------------------------
--------------------------------------------------------------------------------------------------------------------------------------------
-----------------------------------------------------------------------------------------------------------------------------+
| nodes | CREATE TABLE `nodes` (
`id` bigint unsigned NOT NULL AUTO_INCREMENT,
`created_at` datetime(3) DEFAULT NULL,
`updated_at` datetime(3) DEFAULT NULL,
`deleted_at` datetime(3) DEFAULT NULL,
`bool` tinyint(1) DEFAULT NULL,
`int` bigint DEFAULT NULL,
`uint` bigint unsigned DEFAULT NULL,
`int8` tinyint DEFAULT NULL,
`uint8` tinyint unsigned DEFAULT NULL,
`byte` tinyint unsigned DEFAULT NULL,
`int32` int DEFAULT NULL,
`rune` int DEFAULT NULL,
`uint32` int unsigned DEFAULT NULL,
`int64` bigint DEFAULT NULL,
`uint64` bigint unsigned DEFAULT NULL,
`float32` float DEFAULT NULL,
`float64` double DEFAULT NULL,
`string` longtext COLLATE utf8_bin,
PRIMARY KEY (`id`),
KEY `idx_nodes_deleted_at` (`deleted_at`)
) ENGINE=MyISAM DEFAULT CHARSET=utf8 COLLATE=utf8_bin ROW_FORMAT=DYNAMIC |
+-------+-----------------------------------------------------------------------------------------------------------------------------------
--------------------------------------------------------------------------------------------------------------------------------------------
--------------------------------------------------------------------------------------------------------------------------------------------
--------------------------------------------------------------------------------------------------------------------------------------------
--------------------------------------------------------------------------------------------------------------------------------------------
-----------------------------------------------------------------------------------------------------------------------------+
1 row in set (0.02 sec)
mysql> desc nodes;
+------------+------------------+------+-----+---------+----------------+
| Field | Type | Null | Key | Default | Extra |
+------------+------------------+------+-----+---------+----------------+
| id | bigint unsigned | NO | PRI | NULL | auto_increment |
| created_at | datetime(3) | YES | | NULL | |
| updated_at | datetime(3) | YES | | NULL | |
| deleted_at | datetime(3) | YES | MUL | NULL | |
| bool | tinyint(1) | YES | | NULL | |
| int | bigint | YES | | NULL | |
| uint | bigint unsigned | YES | | NULL | |
| int8 | tinyint | YES | | NULL | |
| uint8 | tinyint unsigned | YES | | NULL | |
| byte | tinyint unsigned | YES | | NULL | |
| int32 | int | YES | | NULL | |
| rune | int | YES | | NULL | |
| uint32 | int unsigned | YES | | NULL | |
| int64 | bigint | YES | | NULL | |
| uint64 | bigint unsigned | YES | | NULL | |
| float32 | float | YES | | NULL | |
| float64 | double | YES | | NULL | |
| string | longtext | YES | | NULL | |
+------------+------------------+------+-----+---------+----------------+
18 rows in set (0.04 sec)
mysql>
参考资料：
迁移 | GORM - The fantastic ORM library for Golang, aims to be developer friendly.
创建表时附带的ENGINE=InnoDB DEFAULT CHARSET=utf8 COLLATE = utf8_general_ci ROW_FORMAT = Dynamic 的解释_atu1111的博客-CSDN博客