mirror of https://github.com/go-gorm/gorm.git
95 lines
2.3 KiB
Go
95 lines
2.3 KiB
Go
package gorm
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import (
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"fmt"
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"reflect"
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"strings"
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"time"
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)
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type mysql struct {
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commonDialect
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}
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func init() {
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RegisterDialect("mysql", &mysql{})
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}
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func (mysql) Quote(key string) string {
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return fmt.Sprintf("`%s`", key)
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}
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// Get Data Type for MySQL Dialect
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func (mysql) DataTypeOf(field *StructField) string {
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var dataValue, sqlType, size, additionalType = ParseFieldStructForDialect(field)
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if sqlType == "" {
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switch dataValue.Kind() {
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case reflect.Bool:
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sqlType = "boolean"
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case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32:
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if _, ok := field.TagSettings["AUTO_INCREMENT"]; ok || field.IsPrimaryKey {
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sqlType = "int AUTO_INCREMENT"
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} else {
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sqlType = "int"
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}
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case reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uintptr:
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if _, ok := field.TagSettings["AUTO_INCREMENT"]; ok || field.IsPrimaryKey {
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sqlType = "int unsigned AUTO_INCREMENT"
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} else {
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sqlType = "int unsigned"
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}
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case reflect.Int64:
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if _, ok := field.TagSettings["AUTO_INCREMENT"]; ok || field.IsPrimaryKey {
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sqlType = "bigint AUTO_INCREMENT"
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} else {
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sqlType = "bigint"
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}
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case reflect.Uint64:
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if _, ok := field.TagSettings["AUTO_INCREMENT"]; ok || field.IsPrimaryKey {
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sqlType = "bigint unsigned AUTO_INCREMENT"
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} else {
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sqlType = "bigint unsigned"
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}
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case reflect.Float32, reflect.Float64:
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sqlType = "double"
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case reflect.String:
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if size > 0 && size < 65532 {
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sqlType = fmt.Sprintf("varchar(%d)", size)
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} else {
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sqlType = "longtext"
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}
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case reflect.Struct:
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if _, ok := dataValue.Interface().(time.Time); ok {
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sqlType = "timestamp NULL"
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}
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default:
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if _, ok := dataValue.Interface().([]byte); ok {
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if size > 0 && size < 65532 {
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sqlType = fmt.Sprintf("varbinary(%d)", size)
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} else {
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sqlType = "longblob"
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}
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}
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}
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}
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if sqlType == "" {
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panic(fmt.Sprintf("invalid sql type %s (%s) for mysql", dataValue.Type().Name(), dataValue.Kind().String()))
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}
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if strings.TrimSpace(additionalType) == "" {
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return sqlType
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}
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return fmt.Sprintf("%v %v", sqlType, additionalType)
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}
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func (s mysql) currentDatabase(scope *Scope) (name string) {
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s.RawScanString(scope, &name, "SELECT DATABASE()")
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return
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}
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func (mysql) SelectFromDummyTable() string {
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return "FROM DUAL"
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}
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