forked from mirror/gorm
85 lines
1.7 KiB
Go
85 lines
1.7 KiB
Go
package mssql
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import (
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"database/sql"
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"fmt"
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"strconv"
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_ "github.com/denisenkom/go-mssqldb"
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"github.com/jinzhu/gorm"
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"github.com/jinzhu/gorm/callbacks"
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"github.com/jinzhu/gorm/migrator"
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"github.com/jinzhu/gorm/schema"
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)
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type Dialector struct {
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DSN string
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}
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func Open(dsn string) gorm.Dialector {
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return &Dialector{DSN: dsn}
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}
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func (dialector Dialector) Initialize(db *gorm.DB) (err error) {
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// register callbacks
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callbacks.RegisterDefaultCallbacks(db)
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db.DB, err = sql.Open("sqlserver", dialector.DSN)
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return
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}
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func (dialector Dialector) Migrator(db *gorm.DB) gorm.Migrator {
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return Migrator{migrator.Migrator{Config: migrator.Config{
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DB: db,
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Dialector: dialector,
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CreateIndexAfterCreateTable: true,
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}}}
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}
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func (dialector Dialector) BindVar(stmt *gorm.Statement, v interface{}) string {
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return "@p" + strconv.Itoa(len(stmt.Vars))
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}
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func (dialector Dialector) QuoteChars() [2]byte {
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return [2]byte{'"', '"'} // `name`
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}
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func (dialector Dialector) DataTypeOf(field *schema.Field) string {
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switch field.DataType {
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case schema.Bool:
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return "bit"
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case schema.Int, schema.Uint:
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var sqlType string
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switch {
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case field.Size < 16:
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sqlType = "smallint"
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case field.Size < 31:
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sqlType = "int"
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default:
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sqlType = "bigint"
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}
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if field.AutoIncrement {
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return sqlType + " IDENTITY(1,1)"
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}
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return sqlType
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case schema.Float:
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return "decimal"
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case schema.String:
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size := field.Size
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if field.PrimaryKey && size == 0 {
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size = 256
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}
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if size > 0 && size <= 4000 {
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return fmt.Sprintf("nvarchar(%d)", size)
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}
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return "ntext"
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case schema.Time:
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return "datetimeoffset"
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case schema.Bytes:
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return "binary"
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}
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return ""
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}
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