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Add DataTypeOf for dialector

This commit is contained in:
Jinzhu 2020-02-22 17:53:57 +08:00
parent 0801cdf164
commit fab7d96da5
12 changed files with 640 additions and 129 deletions
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37
dialects/mssql/migrator.go Normal file
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@ -0,0 +1,37 @@
package mssql
import (
"github.com/jinzhu/gorm"
"github.com/jinzhu/gorm/migrator"
)
type Migrator struct {
migrator.Migrator
}
func (m Migrator) HasIndex(value interface{}, name string) bool {
var count int
m.RunWithValue(value, func(stmt *gorm.Statement) error {
return m.DB.Raw(
"SELECT count(*) FROM sys.indexes WHERE name=? AND object_id=OBJECT_ID(?)",
name, stmt.Table,
).Row().Scan(&count)
})
return count > 0
}
func (m Migrator) HasConstraint(value interface{}, name string) bool {
var count int64
m.RunWithValue(value, func(stmt *gorm.Statement) error {
return m.DB.Raw(
`SELECT count(*) FROM sys.foreign_keys as F inner join sys.tables as T on F.parent_object_id=T.object_id inner join information_schema.tables as I on I.TABLE_NAME = T.name WHERE F.name = ? AND T.Name = ? AND I.TABLE_CATALOG = ?;`,
name, stmt.Table, m.CurrentDatabase(),
).Row().Scan(&count)
})
return count > 0
}
func (m Migrator) CurrentDatabase() (name string) {
m.DB.Raw("SELECT DB_NAME() AS [Current Database]").Row().Scan(&name)
return
}

75
dialects/mssql/mssql.go Normal file
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@ -0,0 +1,75 @@
package mssql
import (
"database/sql"
"fmt"
_ "github.com/denisenkom/go-mssqldb"
"github.com/jinzhu/gorm"
"github.com/jinzhu/gorm/callbacks"
"github.com/jinzhu/gorm/migrator"
"github.com/jinzhu/gorm/schema"
)
type Dialector struct {
DSN string
}
func Open(dsn string) gorm.Dialector {
return &Dialector{DSN: dsn}
}
func (dialector Dialector) Initialize(db *gorm.DB) (err error) {
// register callbacks
callbacks.RegisterDefaultCallbacks(db)
db.DB, err = sql.Open("sqlserver", dialector.DSN)
return
}
func (dialector Dialector) Migrator(db *gorm.DB) gorm.Migrator {
return Migrator{migrator.Migrator{Config: migrator.Config{DB: db}}}
}
func (dialector Dialector) BindVar(stmt *gorm.Statement, v interface{}) string {
return "?"
}
func (dialector Dialector) QuoteChars() [2]byte {
return [2]byte{'[', ']'} // `name`
}
func (dialector Dialector) DataTypeOf(field *schema.Field) string {
switch field.DataType {
case schema.Bool:
return "bit"
case schema.Int, schema.Uint:
var sqlType string
switch {
case field.Size < 16:
sqlType = "smallint"
case field.Size < 31:
sqlType = "int"
default:
sqlType = "bigint"
}
if field.AutoIncrement {
return sqlType + " IDENTITY(1,1)"
}
return sqlType
case schema.Float:
return "decimal"
case schema.String:
if field.Size > 0 && field.Size <= 4000 {
return fmt.Sprintf("nvarchar(%d)", field.Size)
}
return "ntext"
case schema.Time:
return "datetimeoffset"
case schema.Bytes:
return "binary"
}
return ""
}

43
dialects/mysql/migrator.go Normal file
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@ -0,0 +1,43 @@
package mysql
import (
"fmt"
"github.com/jinzhu/gorm"
"github.com/jinzhu/gorm/clause"
"github.com/jinzhu/gorm/migrator"
)
type Migrator struct {
migrator.Migrator
}
func (m Migrator) AlterColumn(value interface{}, field string) error {
return m.RunWithValue(value, func(stmt *gorm.Statement) error {
if field := stmt.Schema.LookUpField(field); field != nil {
return m.DB.Exec(
"ALTER TABLE ? MODIFY COLUMN ? TYPE ?",
clause.Table{Name: stmt.Table}, clause.Column{Name: field.DBName}, clause.Expr{SQL: field.DBDataType},
).Error
}
return fmt.Errorf("failed to look up field with name: %s", field)
})
}
func (m Migrator) DropConstraint(value interface{}, name string) error {
return m.RunWithValue(value, func(stmt *gorm.Statement) error {
for _, chk := range stmt.Schema.ParseCheckConstraints() {
if chk.Name == name {
return m.DB.Exec(
"ALTER TABLE ? DROP CHECK ?",
clause.Table{Name: stmt.Table}, clause.Column{Name: name},
).Error
}
}
return m.DB.Exec(
"ALTER TABLE ? DROP FOREIGN KEY ?",
clause.Table{Name: stmt.Table}, clause.Column{Name: name},
).Error
})
}

83
dialects/mysql/mysql.go
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@ -1,33 +1,104 @@
package mysql
import (
"database/sql"
"fmt"
"math"
_ "github.com/go-sql-driver/mysql"
"github.com/jinzhu/gorm"
"github.com/jinzhu/gorm/callbacks"
"github.com/jinzhu/gorm/migrator"
"github.com/jinzhu/gorm/schema"
)
type Dialector struct {
DSN string
}
func Open(dsn string) gorm.Dialector {
return &Dialector{}
return &Dialector{DSN: dsn}
}
func (Dialector) Initialize(db *gorm.DB) error {
func (dialector Dialector) Initialize(db *gorm.DB) (err error) {
// register callbacks
callbacks.RegisterDefaultCallbacks(db)
db.DB, err = sql.Open("sqlite3", dialector.DSN)
return nil
}
func (Dialector) Migrator() gorm.Migrator {
return nil
func (dialector Dialector) Migrator(db *gorm.DB) gorm.Migrator {
return Migrator{migrator.Migrator{Config: migrator.Config{DB: db}}}
}
func (Dialector) BindVar(stmt gorm.Statement, v interface{}) string {
func (dialector Dialector) BindVar(stmt *gorm.Statement, v interface{}) string {
return "?"
}
func (Dialector) QuoteChars() [2]byte {
func (dialector Dialector) QuoteChars() [2]byte {
return [2]byte{'`', '`'} // `name`
}
func (dialector Dialector) DataTypeOf(field *schema.Field) string {
switch field.DataType {
case schema.Bool:
return "boolean"
case schema.Int, schema.Uint:
sqlType := "int"
switch {
case field.Size <= 8:
sqlType = "tinyint"
case field.Size <= 16:
sqlType = "smallint"
case field.Size <= 32:
sqlType = "int"
default:
sqlType = "bigint"
}
if field.DataType == schema.Uint {
sqlType += " unsigned"
}
if field.AutoIncrement {
sqlType += " AUTO_INCREMENT"
}
return sqlType
case schema.Float:
if field.Size <= 32 {
return "float"
}
return "double"
case schema.String:
size := field.Size
if size >= 65536 && size <= int(math.Pow(2, 24)) {
return "mediumtext"
} else if size > int(math.Pow(2, 24)) || size < 0 {
return "longtext"
}
return fmt.Sprintf("varchar(%d)", size)
case schema.Time:
precision := ""
if field.Precision > 0 {
precision = fmt.Sprintf("(%d)", field.Precision)
}
if field.NotNull || field.PrimaryKey {
return "datetime" + precision
}
return "datetime" + precision + " NULL"
case schema.Bytes:
if field.Size > 0 && field.Size < 65536 {
return fmt.Sprintf("varbinary(%d)", field.Size)
}
if field.Size >= 65536 && field.Size <= int(math.Pow(2, 24)) {
return "mediumblob"
}
return "longblob"
}
return ""
}

89
dialects/postgres/migrator.go Normal file
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@ -0,0 +1,89 @@
package postgres
import (
"fmt"
"github.com/jinzhu/gorm"
"github.com/jinzhu/gorm/clause"
"github.com/jinzhu/gorm/migrator"
"github.com/jinzhu/gorm/schema"
)
type Migrator struct {
migrator.Migrator
}
func (m Migrator) CurrentDatabase() (name string) {
m.DB.Raw("SELECT CURRENT_DATABASE()").Row().Scan(&name)
return
}
func (m Migrator) BuildIndexOptions(opts []schema.IndexOption, stmt *gorm.Statement) (results []interface{}) {
for _, opt := range opts {
str := stmt.Quote(opt.DBName)
if opt.Expression != "" {
str = opt.Expression
}
if opt.Collate != "" {
str += " COLLATE " + opt.Collate
}
if opt.Sort != "" {
str += " " + opt.Sort
}
results = append(results, clause.Expr{SQL: str})
}
return
}
func (m Migrator) HasIndex(value interface{}, indexName string) bool {
var count int64
m.RunWithValue(value, func(stmt *gorm.Statement) error {
return m.DB.Raw(
"SELECT count(*) FROM pg_indexes WHERE tablename = ? AND indexname = ? AND schemaname = CURRENT_SCHEMA()", stmt.Table, indexName,
).Row().Scan(&count)
})
return count > 0
}
func (m Migrator) CreateIndex(value interface{}, name string) error {
return m.RunWithValue(value, func(stmt *gorm.Statement) error {
err := fmt.Errorf("failed to create index with name %v", name)
indexes := stmt.Schema.ParseIndexes()
if idx, ok := indexes[name]; ok {
opts := m.BuildIndexOptions(idx.Fields, stmt)
values := []interface{}{clause.Column{Name: idx.Name}, clause.Table{Name: stmt.Table}, opts}
createIndexSQL := "CREATE "
if idx.Class != "" {
createIndexSQL += idx.Class + " "
}
createIndexSQL += "INDEX ?"
if idx.Type != "" {
createIndexSQL += " USING " + idx.Type
}
createIndexSQL += " ON ??"
if idx.Where != "" {
createIndexSQL += " WHERE " + idx.Where
}
return m.DB.Exec(createIndexSQL, values...).Error
} else if field := stmt.Schema.LookUpField(name); field != nil {
for _, idx := range indexes {
for _, idxOpt := range idx.Fields {
if idxOpt.Field == field {
if err = m.CreateIndex(value, idx.Name); err != nil {
return err
}
}
}
}
}
return err
})
}

51
dialects/postgres/postgres.go
View File

@ -2,9 +2,12 @@ package postgres
import (
"database/sql"
"fmt"
"github.com/jinzhu/gorm"
"github.com/jinzhu/gorm/callbacks"
"github.com/jinzhu/gorm/migrator"
"github.com/jinzhu/gorm/schema"
_ "github.com/lib/pq"
)
@ -24,14 +27,54 @@ func (dialector Dialector) Initialize(db *gorm.DB) (err error) {
return
}
func (Dialector) Migrator() gorm.Migrator {
return nil
func (dialector Dialector) Migrator(db *gorm.DB) gorm.Migrator {
return Migrator{migrator.Migrator{Config: migrator.Config{DB: db}}}
}
func (Dialector) BindVar(stmt *gorm.Statement, v interface{}) string {
func (dialector Dialector) BindVar(stmt *gorm.Statement, v interface{}) string {
return "?"
}
func (Dialector) QuoteChars() [2]byte {
func (dialector Dialector) QuoteChars() [2]byte {
return [2]byte{'"', '"'} // "name"
}
func (dialector Dialector) DataTypeOf(field *schema.Field) string {
switch field.DataType {
case schema.Bool:
return "boolean"
case schema.Int, schema.Uint:
if field.AutoIncrement {
switch {
case field.Size < 16:
return "smallserial"
case field.Size < 31:
return "serial"
default:
return "bigserial"
}
} else {
switch {
case field.Size < 16:
return "smallint"
case field.Size < 31:
return "integer"
default:
return "bigint"
}
}
case schema.Float:
return "decimal"
case schema.String:
if field.Size > 0 {
return fmt.Sprintf("varchar(%d)", field.Size)
}
return "text"
case schema.Time:
return "timestamp with time zone"
case schema.Bytes:
return "bytea"
}
return ""
}

122
dialects/sqlite/migrator.go Normal file
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@ -0,0 +1,122 @@
package sqlite
import (
"fmt"
"github.com/jinzhu/gorm"
"github.com/jinzhu/gorm/clause"
"github.com/jinzhu/gorm/migrator"
"github.com/jinzhu/gorm/schema"
)
type Migrator struct {
migrator.Migrator
}
func (m Migrator) HasTable(value interface{}) bool {
var count int
m.Migrator.RunWithValue(value, func(stmt *gorm.Statement) error {
return m.DB.Raw("SELECT count(*) FROM sqlite_master WHERE type='table' AND name=?", stmt.Table).Row().Scan(&count)
})
return count > 0
}
func (m Migrator) HasColumn(value interface{}, field string) bool {
var count int
m.Migrator.RunWithValue(value, func(stmt *gorm.Statement) error {
name := field
if field := stmt.Schema.LookUpField(field); field != nil {
name = field.DBName
}
return m.DB.Raw(
"SELECT count(*) FROM sqlite_master WHERE tbl_name = ? AND (sql LIKE ? OR sql LIKE ?)",
stmt.Table, `%"`+name+`" %`, `%`+name+` %`,
).Row().Scan(&count)
})
return count > 0
}
func (m Migrator) HasIndex(value interface{}, name string) bool {
var count int
m.RunWithValue(value, func(stmt *gorm.Statement) error {
return m.DB.Raw(
"SELECT count(*) FROM sqlite_master WHERE tbl_name = ? AND sql LIKE ?",
stmt.Table, "%INDEX "+name+" ON%",
).Row().Scan(&count)
})
return count > 0
}
func (m Migrator) CreateConstraint(interface{}, string) error {
return gorm.ErrNotImplemented
}
func (m Migrator) DropConstraint(interface{}, string) error {
return gorm.ErrNotImplemented
}
func (m Migrator) CurrentDatabase() (name string) {
var null interface{}
m.DB.Raw("PRAGMA database_list").Row().Scan(&null, &name, &null)
return
}
func (m Migrator) BuildIndexOptions(opts []schema.IndexOption, stmt *gorm.Statement) (results []interface{}) {
for _, opt := range opts {
str := stmt.Quote(opt.DBName)
if opt.Expression != "" {
str = opt.Expression
}
if opt.Collate != "" {
str += " COLLATE " + opt.Collate
}
if opt.Sort != "" {
str += " " + opt.Sort
}
results = append(results, clause.Expr{SQL: str})
}
return
}
func (m Migrator) CreateIndex(value interface{}, name string) error {
return m.RunWithValue(value, func(stmt *gorm.Statement) error {
err := fmt.Errorf("failed to create index with name %v", name)
indexes := stmt.Schema.ParseIndexes()
if idx, ok := indexes[name]; ok {
opts := m.BuildIndexOptions(idx.Fields, stmt)
values := []interface{}{clause.Column{Name: idx.Name}, clause.Table{Name: stmt.Table}, opts}
createIndexSQL := "CREATE "
if idx.Class != "" {
createIndexSQL += idx.Class + " "
}
createIndexSQL += "INDEX ?"
if idx.Type != "" {
createIndexSQL += " USING " + idx.Type
}
createIndexSQL += " ON ??"
if idx.Where != "" {
createIndexSQL += " WHERE " + idx.Where
}
return m.DB.Exec(createIndexSQL, values...).Error
} else if field := stmt.Schema.LookUpField(name); field != nil {
for _, idx := range indexes {
for _, idxOpt := range idx.Fields {
if idxOpt.Field == field {
if err = m.CreateIndex(value, idx.Name); err != nil {
return err
}
}
}
}
}
return err
})
}

32
dialects/sqlite/sqlite.go
View File

@ -5,6 +5,8 @@ import (
"github.com/jinzhu/gorm"
"github.com/jinzhu/gorm/callbacks"
"github.com/jinzhu/gorm/migrator"
"github.com/jinzhu/gorm/schema"
_ "github.com/mattn/go-sqlite3"
)
@ -24,14 +26,36 @@ func (dialector Dialector) Initialize(db *gorm.DB) (err error) {
return
}
func (Dialector) Migrator() gorm.Migrator {
return nil
func (dialector Dialector) Migrator(db *gorm.DB) gorm.Migrator {
return Migrator{migrator.Migrator{Config: migrator.Config{DB: db}}}
}
func (Dialector) BindVar(stmt *gorm.Statement, v interface{}) string {
func (dialector Dialector) BindVar(stmt *gorm.Statement, v interface{}) string {
return "?"
}
func (Dialector) QuoteChars() [2]byte {
func (dialector Dialector) QuoteChars() [2]byte {
return [2]byte{'`', '`'} // `name`
}
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, schema.Time:
return "TEXT"
case schema.Bytes:
return "BLOB"
}
return ""
}

5
interfaces.go
View File

@ -3,12 +3,15 @@ package gorm
import (
"context"
"database/sql"
"github.com/jinzhu/gorm/schema"
)
// Dialector GORM database dialector
type Dialector interface {
Initialize(*DB) error
Migrator() Migrator
Migrator(db *DB) Migrator
DataTypeOf(*schema.Field) string
BindVar(stmt *Statement, v interface{}) string
QuoteChars() [2]byte
}

4
migrator.go
View File

@ -6,7 +6,7 @@ import (
// Migrator returns migrator
func (db *DB) Migrator() Migrator {
return db.Dialector.Migrator()
return db.Dialector.Migrator(db)
}
// ViewOption view option
@ -26,7 +26,7 @@ type Migrator interface {
// Tables
CreateTable(dst ...interface{}) error
DropTable(dst ...interface{}) error
HasTable(dst ...interface{}) bool
HasTable(dst interface{}) bool
RenameTable(oldName, newName string) error
// Columns

219
migrator/migrator.go
View File

@ -11,21 +11,21 @@ import (
"github.com/jinzhu/gorm/schema"
)
// Migrator migrator struct
// Migrator m struct
type Migrator struct {
*Config
Config
}
// Config schema config
type Config struct {
CheckExistsBeforeDropping bool
DB *gorm.DB
gorm.Dialector
}
func (migrator Migrator) RunWithValue(value interface{}, fc func(*gorm.Statement) error) error {
stmt := migrator.DB.Statement
func (m Migrator) RunWithValue(value interface{}, fc func(*gorm.Statement) error) error {
stmt := m.DB.Statement
if stmt == nil {
stmt = &gorm.Statement{DB: migrator.DB}
stmt = &gorm.Statement{DB: m.DB}
}
if err := stmt.Parse(value); err != nil {
@ -35,20 +35,28 @@ func (migrator Migrator) RunWithValue(value interface{}, fc func(*gorm.Statement
return fc(stmt)
}
func (m Migrator) DataTypeOf(field *schema.Field) string {
if field.DBDataType != "" {
return field.DBDataType
}
return m.Dialector.DataTypeOf(field)
}
// AutoMigrate
func (migrator Migrator) AutoMigrate(values ...interface{}) error {
func (m Migrator) AutoMigrate(values ...interface{}) error {
// TODO smart migrate data type
for _, value := range values {
if !migrator.DB.Migrator().HasTable(value) {
if err := migrator.DB.Migrator().CreateTable(value); err != nil {
if !m.DB.Migrator().HasTable(value) {
if err := m.DB.Migrator().CreateTable(value); err != nil {
return err
}
} else {
if err := migrator.RunWithValue(value, func(stmt *gorm.Statement) error {
if err := m.RunWithValue(value, func(stmt *gorm.Statement) error {
for _, field := range stmt.Schema.FieldsByDBName {
if !migrator.DB.Migrator().HasColumn(value, field.DBName) {
if err := migrator.DB.Migrator().AddColumn(value, field.DBName); err != nil {
if !m.DB.Migrator().HasColumn(value, field.DBName) {
if err := m.DB.Migrator().AddColumn(value, field.DBName); err != nil {
return err
}
}
@ -56,16 +64,16 @@ func (migrator Migrator) AutoMigrate(values ...interface{}) error {
for _, rel := range stmt.Schema.Relationships.Relations {
if constraint := rel.ParseConstraint(); constraint != nil {
if !migrator.DB.Migrator().HasConstraint(value, constraint.Name) {
if err := migrator.DB.Migrator().CreateConstraint(value, constraint.Name); err != nil {
if !m.DB.Migrator().HasConstraint(value, constraint.Name) {
if err := m.DB.Migrator().CreateConstraint(value, constraint.Name); err != nil {
return err
}
}
}
for _, chk := range stmt.Schema.ParseCheckConstraints() {
if !migrator.DB.Migrator().HasConstraint(value, chk.Name) {
if err := migrator.DB.Migrator().CreateConstraint(value, chk.Name); err != nil {
if !m.DB.Migrator().HasConstraint(value, chk.Name) {
if err := m.DB.Migrator().CreateConstraint(value, chk.Name); err != nil {
return err
}
}
@ -73,8 +81,8 @@ func (migrator Migrator) AutoMigrate(values ...interface{}) error {
// create join table
joinValue := reflect.New(rel.JoinTable.ModelType).Interface()
if !migrator.DB.Migrator().HasTable(joinValue) {
defer migrator.DB.Migrator().CreateTable(joinValue)
if !m.DB.Migrator().HasTable(joinValue) {
defer m.DB.Migrator().CreateTable(joinValue)
}
}
return nil
@ -87,9 +95,9 @@ func (migrator Migrator) AutoMigrate(values ...interface{}) error {
return nil
}
func (migrator Migrator) CreateTable(values ...interface{}) error {
func (m Migrator) CreateTable(values ...interface{}) error {
for _, value := range values {
if err := migrator.RunWithValue(value, func(stmt *gorm.Statement) error {
if err := m.RunWithValue(value, func(stmt *gorm.Statement) error {
var (
createTableSQL = "CREATE TABLE ? ("
values = []interface{}{clause.Table{Name: stmt.Table}}
@ -100,7 +108,7 @@ func (migrator Migrator) CreateTable(values ...interface{}) error {
field := stmt.Schema.FieldsByDBName[dbName]
createTableSQL += fmt.Sprintf("? ?")
hasPrimaryKeyInDataType = hasPrimaryKeyInDataType || strings.Contains(strings.ToUpper(field.DBDataType), "PRIMARY KEY")
values = append(values, clause.Column{Name: dbName}, clause.Expr{SQL: field.DBDataType})
values = append(values, clause.Column{Name: dbName}, clause.Expr{SQL: m.DataTypeOf(field)})
if field.AutoIncrement {
createTableSQL += " AUTO_INCREMENT"
@ -133,7 +141,7 @@ func (migrator Migrator) CreateTable(values ...interface{}) error {
for _, idx := range stmt.Schema.ParseIndexes() {
createTableSQL += "INDEX ? ?,"
values = append(values, clause.Expr{SQL: idx.Name}, buildIndexOptions(idx.Fields, stmt))
values = append(values, clause.Expr{SQL: idx.Name}, m.DB.Migrator().(BuildIndexOptionsInterface).BuildIndexOptions(idx.Fields, stmt))
}
for _, rel := range stmt.Schema.Relationships.Relations {
@ -145,8 +153,8 @@ func (migrator Migrator) CreateTable(values ...interface{}) error {
// create join table
joinValue := reflect.New(rel.JoinTable.ModelType).Interface()
if !migrator.DB.Migrator().HasTable(joinValue) {
defer migrator.DB.Migrator().CreateTable(joinValue)
if !m.DB.Migrator().HasTable(joinValue) {
defer m.DB.Migrator().CreateTable(joinValue)
}
}
@ -158,7 +166,7 @@ func (migrator Migrator) CreateTable(values ...interface{}) error {
createTableSQL = strings.TrimSuffix(createTableSQL, ",")
createTableSQL += ")"
return migrator.DB.Exec(createTableSQL, values...).Error
return m.DB.Exec(createTableSQL, values...).Error
}); err != nil {
return err
}
@ -166,10 +174,10 @@ func (migrator Migrator) CreateTable(values ...interface{}) error {
return nil
}
func (migrator Migrator) DropTable(values ...interface{}) error {
func (m Migrator) DropTable(values ...interface{}) error {
for _, value := range values {
if err := migrator.RunWithValue(value, func(stmt *gorm.Statement) error {
return migrator.DB.Exec("DROP TABLE ?", clause.Table{Name: stmt.Table}).Error
if err := m.RunWithValue(value, func(stmt *gorm.Statement) error {
return m.DB.Exec("DROP TABLE ?", clause.Table{Name: stmt.Table}).Error
}); err != nil {
return err
}
@ -177,42 +185,36 @@ func (migrator Migrator) DropTable(values ...interface{}) error {
return nil
}
func (migrator Migrator) HasTable(values ...interface{}) bool {
func (m Migrator) HasTable(value interface{}) bool {
var count int64
for _, value := range values {
err := migrator.RunWithValue(value, func(stmt *gorm.Statement) error {
currentDatabase := migrator.DB.Migrator().CurrentDatabase()
return migrator.DB.Raw("SELECT count(*) FROM information_schema.tables WHERE table_schema = ? AND table_name = ? AND table_type = ?", currentDatabase, stmt.Table, "BASE TABLE").Scan(&count).Error
m.RunWithValue(value, func(stmt *gorm.Statement) error {
currentDatabase := m.DB.Migrator().CurrentDatabase()
return m.DB.Raw("SELECT count(*) FROM information_schema.tables WHERE table_schema = ? AND table_name = ? AND table_type = ?", currentDatabase, stmt.Table, "BASE TABLE").Row().Scan(&count)
})
if err != nil || count == 0 {
return false
}
return count > 0
}
return true
func (m Migrator) RenameTable(oldName, newName string) error {
return m.DB.Exec("RENAME TABLE ? TO ?", oldName, newName).Error
}
func (migrator Migrator) RenameTable(oldName, newName string) error {
return migrator.DB.Exec("RENAME TABLE ? TO ?", oldName, newName).Error
}
func (migrator Migrator) AddColumn(value interface{}, field string) error {
return migrator.RunWithValue(value, func(stmt *gorm.Statement) error {
func (m Migrator) AddColumn(value interface{}, field string) error {
return m.RunWithValue(value, func(stmt *gorm.Statement) error {
if field := stmt.Schema.LookUpField(field); field != nil {
return migrator.DB.Exec(
return m.DB.Exec(
"ALTER TABLE ? ADD ? ?",
clause.Table{Name: stmt.Table}, clause.Column{Name: field.DBName}, clause.Expr{SQL: field.DBDataType},
clause.Table{Name: stmt.Table}, clause.Column{Name: field.DBName}, clause.Expr{SQL: m.DataTypeOf(field)},
).Error
}
return fmt.Errorf("failed to look up field with name: %s", field)
})
}
func (migrator Migrator) DropColumn(value interface{}, field string) error {
return migrator.RunWithValue(value, func(stmt *gorm.Statement) error {
func (m Migrator) DropColumn(value interface{}, field string) error {
return m.RunWithValue(value, func(stmt *gorm.Statement) error {
if field := stmt.Schema.LookUpField(field); field != nil {
return migrator.DB.Exec(
return m.DB.Exec(
"ALTER TABLE ? DROP COLUMN ?", clause.Table{Name: stmt.Table}, clause.Column{Name: field.DBName},
).Error
}
@ -220,44 +222,41 @@ func (migrator Migrator) DropColumn(value interface{}, field string) error {
})
}
func (migrator Migrator) AlterColumn(value interface{}, field string) error {
return migrator.RunWithValue(value, func(stmt *gorm.Statement) error {
func (m Migrator) AlterColumn(value interface{}, field string) error {
return m.RunWithValue(value, func(stmt *gorm.Statement) error {
if field := stmt.Schema.LookUpField(field); field != nil {
return migrator.DB.Exec(
return m.DB.Exec(
"ALTER TABLE ? ALTER COLUMN ? TYPE ?",
clause.Table{Name: stmt.Table}, clause.Column{Name: field.DBName}, clause.Expr{SQL: field.DBDataType},
clause.Table{Name: stmt.Table}, clause.Column{Name: field.DBName}, clause.Expr{SQL: m.DataTypeOf(field)},
).Error
}
return fmt.Errorf("failed to look up field with name: %s", field)
})
}
func (migrator Migrator) HasColumn(value interface{}, field string) bool {
func (m Migrator) HasColumn(value interface{}, field string) bool {
var count int64
migrator.RunWithValue(value, func(stmt *gorm.Statement) error {
currentDatabase := migrator.DB.Migrator().CurrentDatabase()
m.RunWithValue(value, func(stmt *gorm.Statement) error {
currentDatabase := m.DB.Migrator().CurrentDatabase()
name := field
if field := stmt.Schema.LookUpField(field); field != nil {
name = field.DBName
}
return migrator.DB.Raw(
return m.DB.Raw(
"SELECT count(*) FROM INFORMATION_SCHEMA.columns WHERE table_schema = ? AND table_name = ? AND column_name = ?",
currentDatabase, stmt.Table, name,
).Scan(&count).Error
).Row().Scan(&count)
})
if count != 0 {
return true
}
return false
return count > 0
}
func (migrator Migrator) RenameColumn(value interface{}, oldName, field string) error {
return migrator.RunWithValue(value, func(stmt *gorm.Statement) error {
func (m Migrator) RenameColumn(value interface{}, oldName, field string) error {
return m.RunWithValue(value, func(stmt *gorm.Statement) error {
if field := stmt.Schema.LookUpField(field); field != nil {
oldName = migrator.DB.NamingStrategy.ColumnName(stmt.Table, oldName)
return migrator.DB.Exec(
oldName = m.DB.NamingStrategy.ColumnName(stmt.Table, oldName)
return m.DB.Exec(
"ALTER TABLE ? RENAME COLUMN ? TO ?",
clause.Table{Name: stmt.Table}, clause.Column{Name: oldName}, clause.Column{Name: field.DBName},
).Error
@ -266,15 +265,15 @@ func (migrator Migrator) RenameColumn(value interface{}, oldName, field string)
})
}
func (migrator Migrator) ColumnTypes(value interface{}) ([]*sql.ColumnType, error) {
func (m Migrator) ColumnTypes(value interface{}) ([]*sql.ColumnType, error) {
return nil, gorm.ErrNotImplemented
}
func (migrator Migrator) CreateView(name string, option gorm.ViewOption) error {
func (m Migrator) CreateView(name string, option gorm.ViewOption) error {
return gorm.ErrNotImplemented
}
func (migrator Migrator) DropView(name string) error {
func (m Migrator) DropView(name string) error {
return gorm.ErrNotImplemented
}
@ -300,11 +299,11 @@ func buildConstraint(constraint *schema.Constraint) (sql string, results []inter
return
}
func (migrator Migrator) CreateConstraint(value interface{}, name string) error {
return migrator.RunWithValue(value, func(stmt *gorm.Statement) error {
func (m Migrator) CreateConstraint(value interface{}, name string) error {
return m.RunWithValue(value, func(stmt *gorm.Statement) error {
checkConstraints := stmt.Schema.ParseCheckConstraints()
if chk, ok := checkConstraints[name]; ok {
return migrator.DB.Exec(
return m.DB.Exec(
"ALTER TABLE ? ADD CONSTRAINT ? CHECK ?",
clause.Table{Name: stmt.Table}, clause.Column{Name: chk.Name}, clause.Expr{SQL: chk.Constraint},
).Error
@ -313,21 +312,21 @@ func (migrator Migrator) CreateConstraint(value interface{}, name string) error
for _, rel := range stmt.Schema.Relationships.Relations {
if constraint := rel.ParseConstraint(); constraint != nil && constraint.Name == name {
sql, values := buildConstraint(constraint)
return migrator.DB.Exec("ALTER TABLE ? ADD "+sql, append([]interface{}{clause.Table{Name: stmt.Table}}, values...)...).Error
return m.DB.Exec("ALTER TABLE ? ADD "+sql, append([]interface{}{clause.Table{Name: stmt.Table}}, values...)...).Error
}
}
err := fmt.Errorf("failed to create constraint with name %v", name)
if field := stmt.Schema.LookUpField(name); field != nil {
for _, cc := range checkConstraints {
if err = migrator.CreateIndex(value, cc.Name); err != nil {
if err = m.CreateIndex(value, cc.Name); err != nil {
return err
}
}
for _, rel := range stmt.Schema.Relationships.Relations {
if constraint := rel.ParseConstraint(); constraint != nil && constraint.Field == field {
if err = migrator.CreateIndex(value, constraint.Name); err != nil {
if err = m.CreateIndex(value, constraint.Name); err != nil {
return err
}
}
@ -338,32 +337,29 @@ func (migrator Migrator) CreateConstraint(value interface{}, name string) error
})
}
func (migrator Migrator) DropConstraint(value interface{}, name string) error {
return migrator.RunWithValue(value, func(stmt *gorm.Statement) error {
return migrator.DB.Exec(
func (m Migrator) DropConstraint(value interface{}, name string) error {
return m.RunWithValue(value, func(stmt *gorm.Statement) error {
return m.DB.Exec(
"ALTER TABLE ? DROP CONSTRAINT ?",
clause.Table{Name: stmt.Table}, clause.Column{Name: name},
).Error
})
}
func (migrator Migrator) HasConstraint(value interface{}, name string) bool {
func (m Migrator) HasConstraint(value interface{}, name string) bool {
var count int64
migrator.RunWithValue(value, func(stmt *gorm.Statement) error {
currentDatabase := migrator.DB.Migrator().CurrentDatabase()
return migrator.DB.Raw(
m.RunWithValue(value, func(stmt *gorm.Statement) error {
currentDatabase := m.DB.Migrator().CurrentDatabase()
return m.DB.Raw(
"SELECT count(*) FROM INFORMATION_SCHEMA.referential_constraints WHERE constraint_schema = ? AND table_name = ? AND constraint_name = ?",
currentDatabase, stmt.Table, name,
).Scan(&count).Error
).Row().Scan(&count)
})
if count != 0 {
return true
}
return false
return count > 0
}
func buildIndexOptions(opts []schema.IndexOption, stmt *gorm.Statement) (results []interface{}) {
func (m Migrator) BuildIndexOptions(opts []schema.IndexOption, stmt *gorm.Statement) (results []interface{}) {
for _, opt := range opts {
str := stmt.Quote(opt.DBName)
if opt.Expression != "" {
@ -372,6 +368,10 @@ func buildIndexOptions(opts []schema.IndexOption, stmt *gorm.Statement) (results
str += fmt.Sprintf("(%d)", opt.Length)
}
if opt.Collate != "" {
str += " COLLATE " + opt.Collate
}
if opt.Sort != "" {
str += " " + opt.Sort
}
@ -380,13 +380,17 @@ func buildIndexOptions(opts []schema.IndexOption, stmt *gorm.Statement) (results
return
}
func (migrator Migrator) CreateIndex(value interface{}, name string) error {
return migrator.RunWithValue(value, func(stmt *gorm.Statement) error {
type BuildIndexOptionsInterface interface {
BuildIndexOptions([]schema.IndexOption, *gorm.Statement) []interface{}
}
func (m Migrator) CreateIndex(value interface{}, name string) error {
return m.RunWithValue(value, func(stmt *gorm.Statement) error {
err := fmt.Errorf("failed to create index with name %v", name)
indexes := stmt.Schema.ParseIndexes()
if idx, ok := indexes[name]; ok {
opts := buildIndexOptions(idx.Fields, stmt)
opts := m.DB.Migrator().(BuildIndexOptionsInterface).BuildIndexOptions(idx.Fields, stmt)
values := []interface{}{clause.Column{Name: idx.Name}, clause.Table{Name: stmt.Table}, opts}
createIndexSQL := "CREATE "
@ -404,12 +408,12 @@ func (migrator Migrator) CreateIndex(value interface{}, name string) error {
createIndexSQL += " USING " + idx.Type
}
return migrator.DB.Raw(createIndexSQL, values...).Error
return m.DB.Exec(createIndexSQL, values...).Error
} else if field := stmt.Schema.LookUpField(name); field != nil {
for _, idx := range indexes {
for _, idxOpt := range idx.Fields {
if idxOpt.Field == field {
if err = migrator.CreateIndex(value, idx.Name); err != nil {
if err = m.CreateIndex(value, idx.Name); err != nil {
return err
}
}
@ -420,38 +424,35 @@ func (migrator Migrator) CreateIndex(value interface{}, name string) error {
})
}
func (migrator Migrator) DropIndex(value interface{}, name string) error {
return migrator.RunWithValue(value, func(stmt *gorm.Statement) error {
return migrator.DB.Raw("DROP INDEX ? ON ?", clause.Column{Name: name}, clause.Table{Name: stmt.Table}).Error
func (m Migrator) DropIndex(value interface{}, name string) error {
return m.RunWithValue(value, func(stmt *gorm.Statement) error {
return m.DB.Exec("DROP INDEX ? ON ?", clause.Column{Name: name}, clause.Table{Name: stmt.Table}).Error
})
}
func (migrator Migrator) HasIndex(value interface{}, name string) bool {
func (m Migrator) HasIndex(value interface{}, name string) bool {
var count int64
migrator.RunWithValue(value, func(stmt *gorm.Statement) error {
currentDatabase := migrator.DB.Migrator().CurrentDatabase()
return migrator.DB.Raw(
m.RunWithValue(value, func(stmt *gorm.Statement) error {
currentDatabase := m.DB.Migrator().CurrentDatabase()
return m.DB.Raw(
"SELECT count(*) FROM information_schema.statistics WHERE table_schema = ? AND table_name = ? AND index_name = ?",
currentDatabase, stmt.Table, name,
).Scan(&count).Error
).Row().Scan(&count)
})
if count != 0 {
return true
}
return false
return count > 0
}
func (migrator Migrator) RenameIndex(value interface{}, oldName, newName string) error {
return migrator.RunWithValue(value, func(stmt *gorm.Statement) error {
return migrator.DB.Exec(
func (m Migrator) RenameIndex(value interface{}, oldName, newName string) error {
return m.RunWithValue(value, func(stmt *gorm.Statement) error {
return m.DB.Exec(
"ALTER TABLE ? RENAME INDEX ? TO ?",
clause.Table{Name: stmt.Table}, clause.Column{Name: oldName}, clause.Column{Name: newName},
).Error
})
}
func (migrator Migrator) CurrentDatabase() (name string) {
migrator.DB.Raw("SELECT DATABASE()").Scan(&name)
func (m Migrator) CurrentDatabase() (name string) {
m.DB.Raw("SELECT DATABASE()").Row().Scan(&name)
return
}

5
schema/field.go
View File

@ -138,7 +138,10 @@ func (schema *Schema) ParseField(fieldStruct reflect.StructField) *Field {
}
if num, ok := field.TagSettings["SIZE"]; ok {
field.Size, _ = strconv.Atoi(num)
var err error
if field.Size, err = strconv.Atoi(num); err != nil {
field.Size = -1
}
}
if p, ok := field.TagSettings["PRECISION"]; ok {