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migrator.go
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migrator.go
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// MIT License
//
// Copyright (c) 2020 Lack
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in all
// copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
// SOFTWARE.
package dao
import (
"github.com/lack-io/vine/lib/dao/clause"
"github.com/lack-io/vine/lib/dao/schema"
)
// Migrator returns migrator
func (db *DB) Migrator() Migrator {
return db.Dialect.Migrator()
}
// AutoMigrate run auto migration for given models
func (db *DB) AutoMigrate(dst ...interface{}) error {
return db.Migrator().AutoMigrate(dst...)
}
// ViewOption view option
type ViewOption struct {
Replace bool
CheckOption string
Query *DB
}
type ColumnType interface {
Name() string
DatabaseTypeName() string
Length() (length int64, ok bool)
DecimalSize() (precision int64, scale int64, ok bool)
Nullable() (nullable bool, ok bool)
}
type Migrator interface {
// AutoMigrate
AutoMigrate(dst ...interface{}) error
// Database
CurrentDatabase() string
FullDataTypeOf(*schema.Field) clause.Expr
// Tables
CreateTable(dst ...interface{}) error
DropTable(dst ...interface{}) error
HasTable(dst interface{}) bool
RenameTable(oldName, newName interface{}) error
// Columns
AddColumn(dst interface{}, field string) error
DropColumn(dst interface{}, field string) error
AlterColumn(dst interface{}, field string) error
MigrateColumn(dst interface{}, field *schema.Field, columnType ColumnType) error
HasColumn(dst interface{}, field string) bool
RenameColumn(dst interface{}, oldName, field string) error
ColumnTypes(dst interface{}) ([]ColumnType, error)
// Views
CreateView(name string, option ViewOption) error
DropView(name string) error
// Constraints
CreateConstraint(dst interface{}, name string) error
DropConstraint(dst interface{}, name string) error
HasConstraint(dst interface{}, name string) bool
// Indexes
CreateIndex(dst interface{}, name string) error
DropIndex(dst interface{}, name string) error
HasIndex(dst interface{}, name string) bool
RenameIndex(dst interface{}, oldName, newName string) error
}