finclip-app-manager/vendor/gorm.io/driver/mysql/README.md

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2023-11-02 18:36:36 +08:00
# GORM MySQL Driver
## Quick Start
```go
import (
"gorm.io/driver/mysql"
"gorm.io/gorm"
)
// https://github.com/go-sql-driver/mysql
dsn := "gorm:gorm@tcp(localhost:9910)/gorm?charset=utf8&parseTime=True&loc=Local"
db, err := gorm.Open(mysql.Open(dsn), &gorm.Config{})
```
## Configuration
```go
import (
"gorm.io/driver/mysql"
"gorm.io/gorm"
)
var datetimePrecision = 2
db, err := gorm.Open(mysql.New(mysql.Config{
DSN: "gorm:gorm@tcp(localhost:9910)/gorm?charset=utf8&parseTime=True&loc=Local", // data source name, refer https://github.com/go-sql-driver/mysql#dsn-data-source-name
DefaultStringSize: 256, // add default size for string fields, by default, will use db type `longtext` for fields without size, not a primary key, no index defined and don't have default values
DisableDatetimePrecision: true, // disable datetime precision support, which not supported before MySQL 5.6
DefaultDatetimePrecision: &datetimePrecision, // default datetime precision
DontSupportRenameIndex: true, // drop & create index when rename index, rename index not supported before MySQL 5.7, MariaDB
DontSupportRenameColumn: true, // use change when rename column, rename rename not supported before MySQL 8, MariaDB
SkipInitializeWithVersion: false, // smart configure based on used version
}), &gorm.Config{})
```
## Customized Driver
```go
import (
_ "example.com/my_mysql_driver"
"gorm.io/gorm"
)
db, err := gorm.Open(mysql.New(mysql.Config{
DriverName: "my_mysql_driver_name",
DSN: "gorm:gorm@tcp(localhost:9910)/gorm?charset=utf8&parseTime=True&loc=Local", // data source name, refer https://github.com/go-sql-driver/mysql#dsn-data-source-name
})
```
Checkout [https://gorm.io](https://gorm.io) for details.