gorm/dialects/sqlite/sqlite.go

81 lines
1.7 KiB
Go

package sqlite
import (
"database/sql"
"gorm.io/gorm"
"gorm.io/gorm/callbacks"
"gorm.io/gorm/clause"
"gorm.io/gorm/logger"
"gorm.io/gorm/migrator"
"gorm.io/gorm/schema"
_ "github.com/mattn/go-sqlite3"
)
type Dialector struct {
DSN string
}
func Open(dsn string) gorm.Dialector {
return &Dialector{DSN: dsn}
}
func (dialector Dialector) Name() string {
return "sqlite"
}
func (dialector Dialector) Initialize(db *gorm.DB) (err error) {
// register callbacks
callbacks.RegisterDefaultCallbacks(db, &callbacks.Config{
LastInsertIDReversed: true,
})
db.ConnPool, err = sql.Open("sqlite3", dialector.DSN)
return
}
func (dialector Dialector) Migrator(db *gorm.DB) gorm.Migrator {
return Migrator{migrator.Migrator{Config: migrator.Config{
DB: db,
Dialector: dialector,
CreateIndexAfterCreateTable: true,
}}}
}
func (dialector Dialector) BindVarTo(writer clause.Writer, stmt *gorm.Statement, v interface{}) {
writer.WriteByte('?')
}
func (dialector Dialector) QuoteTo(writer clause.Writer, str string) {
writer.WriteByte('`')
writer.WriteString(str)
writer.WriteByte('`')
}
func (dialector Dialector) Explain(sql string, vars ...interface{}) string {
return logger.ExplainSQL(sql, nil, `"`, vars...)
}
func (dialector Dialector) DataTypeOf(field *schema.Field) string {
switch field.DataType {
case schema.Bool:
return "numeric"
case schema.Int, schema.Uint:
if field.AutoIncrement {
// https://www.sqlite.org/autoinc.html
return "integer PRIMARY KEY AUTOINCREMENT"
} else {
return "integer"
}
case schema.Float:
return "real"
case schema.String:
return "text"
case schema.Time:
return "datetime"
case schema.Bytes:
return "blob"
}
return ""
}