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adapted the sqlite driver for v3 (golang-migrate#165)
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DROP TABLE IF EXISTS pets; |
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CREATE TABLE pets ( | ||
name string | ||
); |
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DROP TABLE IF EXISTS pets; |
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ALTER TABLE pets ADD predator bool; |
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package sqlite3 | ||
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||
import ( | ||
"database/sql" | ||
"fmt" | ||
"github.com/mattes/migrate" | ||
"github.com/mattes/migrate/database" | ||
_ "github.com/mattn/go-sqlite3" | ||
"io" | ||
"io/ioutil" | ||
nurl "net/url" | ||
"strings" | ||
) | ||
|
||
func init() { | ||
database.Register("sqlite3", &Sqlite{}) | ||
} | ||
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var DefaultMigrationsTable = "schema_migrations" | ||
var ( | ||
ErrDatabaseDirty = fmt.Errorf("database is dirty") | ||
ErrNilConfig = fmt.Errorf("no config") | ||
ErrNoDatabaseName = fmt.Errorf("no database name") | ||
) | ||
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type Config struct { | ||
MigrationsTable string | ||
DatabaseName string | ||
} | ||
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type Sqlite struct { | ||
db *sql.DB | ||
isLocked bool | ||
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config *Config | ||
} | ||
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func WithInstance(instance *sql.DB, config *Config) (database.Driver, error) { | ||
if config == nil { | ||
return nil, ErrNilConfig | ||
} | ||
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if err := instance.Ping(); err != nil { | ||
return nil, err | ||
} | ||
if len(config.MigrationsTable) == 0 { | ||
config.MigrationsTable = DefaultMigrationsTable | ||
} | ||
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mx := &Sqlite{ | ||
db: instance, | ||
config: config, | ||
} | ||
if err := mx.ensureVersionTable(); err != nil { | ||
return nil, err | ||
} | ||
return mx, nil | ||
} | ||
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func (m *Sqlite) ensureVersionTable() error { | ||
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query := fmt.Sprintf(` | ||
CREATE TABLE IF NOT EXISTS %s (version uint64,dirty bool); | ||
CREATE UNIQUE INDEX IF NOT EXISTS version_unique ON %s (version); | ||
`, DefaultMigrationsTable, DefaultMigrationsTable) | ||
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if _, err := m.db.Exec(query); err != nil { | ||
return err | ||
} | ||
return nil | ||
} | ||
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func (m *Sqlite) Open(url string) (database.Driver, error) { | ||
purl, err := nurl.Parse(url) | ||
if err != nil { | ||
return nil, err | ||
} | ||
dbfile := strings.Replace(migrate.FilterCustomQuery(purl).String(), "sqlite3://", "", 1) | ||
db, err := sql.Open("sqlite3", dbfile) | ||
if err != nil { | ||
return nil, err | ||
} | ||
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migrationsTable := purl.Query().Get("x-migrations-table") | ||
if len(migrationsTable) == 0 { | ||
migrationsTable = DefaultMigrationsTable | ||
} | ||
mx, err := WithInstance(db, &Config{ | ||
DatabaseName: purl.Path, | ||
MigrationsTable: migrationsTable, | ||
}) | ||
if err != nil { | ||
return nil, err | ||
} | ||
return mx, nil | ||
} | ||
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func (m *Sqlite) Close() error { | ||
return m.db.Close() | ||
} | ||
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func (m *Sqlite) Drop() error { | ||
query := `SELECT name FROM sqlite_master WHERE type = 'table';` | ||
tables, err := m.db.Query(query) | ||
if err != nil { | ||
return &database.Error{OrigErr: err, Query: []byte(query)} | ||
} | ||
defer tables.Close() | ||
tableNames := make([]string, 0) | ||
for tables.Next() { | ||
var tableName string | ||
if err := tables.Scan(&tableName); err != nil { | ||
return err | ||
} | ||
if len(tableName) > 0 { | ||
tableNames = append(tableNames, tableName) | ||
} | ||
} | ||
if len(tableNames) > 0 { | ||
for _, t := range tableNames { | ||
query := "DROP TABLE " + t | ||
err = m.executeQuery(query) | ||
if err != nil { | ||
return &database.Error{OrigErr: err, Query: []byte(query)} | ||
} | ||
} | ||
if err := m.ensureVersionTable(); err != nil { | ||
return err | ||
} | ||
query := "VACUUM" | ||
_, err = m.db.Query(query) | ||
if err != nil { | ||
return &database.Error{OrigErr: err, Query: []byte(query)} | ||
} | ||
} | ||
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return nil | ||
} | ||
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func (m *Sqlite) Lock() error { | ||
if m.isLocked { | ||
return database.ErrLocked | ||
} | ||
m.isLocked = true | ||
return nil | ||
} | ||
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func (m *Sqlite) Unlock() error { | ||
if !m.isLocked { | ||
return nil | ||
} | ||
m.isLocked = false | ||
return nil | ||
} | ||
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func (m *Sqlite) Run(migration io.Reader) error { | ||
migr, err := ioutil.ReadAll(migration) | ||
if err != nil { | ||
return err | ||
} | ||
query := string(migr[:]) | ||
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return m.executeQuery(query) | ||
} | ||
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func (m *Sqlite) executeQuery(query string) error { | ||
tx, err := m.db.Begin() | ||
if err != nil { | ||
return &database.Error{OrigErr: err, Err: "transaction start failed"} | ||
} | ||
if _, err := tx.Exec(query); err != nil { | ||
tx.Rollback() | ||
return &database.Error{OrigErr: err, Query: []byte(query)} | ||
} | ||
if err := tx.Commit(); err != nil { | ||
return &database.Error{OrigErr: err, Err: "transaction commit failed"} | ||
} | ||
return nil | ||
} | ||
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func (m *Sqlite) SetVersion(version int, dirty bool) error { | ||
tx, err := m.db.Begin() | ||
if err != nil { | ||
return &database.Error{OrigErr: err, Err: "transaction start failed"} | ||
} | ||
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query := "DELETE FROM " + m.config.MigrationsTable | ||
if _, err := tx.Exec(query); err != nil { | ||
return &database.Error{OrigErr: err, Query: []byte(query)} | ||
} | ||
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if version >= 0 { | ||
query := fmt.Sprintf(`INSERT INTO %s (version, dirty) VALUES (%d, '%t')`, m.config.MigrationsTable, version, dirty) | ||
if _, err := tx.Exec(query); err != nil { | ||
tx.Rollback() | ||
return &database.Error{OrigErr: err, Query: []byte(query)} | ||
} | ||
} | ||
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if err := tx.Commit(); err != nil { | ||
return &database.Error{OrigErr: err, Err: "transaction commit failed"} | ||
} | ||
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return nil | ||
} | ||
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func (m *Sqlite) Version() (version int, dirty bool, err error) { | ||
query := "SELECT version, dirty FROM " + m.config.MigrationsTable + " LIMIT 1" | ||
err = m.db.QueryRow(query).Scan(&version, &dirty) | ||
if err != nil { | ||
return database.NilVersion, false, nil | ||
} | ||
return version, dirty, nil | ||
} |
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@@ -0,0 +1,61 @@ | ||
package sqlite3 | ||
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import ( | ||
"database/sql" | ||
"fmt" | ||
"github.com/mattes/migrate" | ||
dt "github.com/mattes/migrate/database/testing" | ||
_ "github.com/mattes/migrate/source/file" | ||
_ "github.com/mattn/go-sqlite3" | ||
"io/ioutil" | ||
"os" | ||
"path/filepath" | ||
"testing" | ||
) | ||
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func Test(t *testing.T) { | ||
dir, err := ioutil.TempDir("", "sqlite3-driver-test") | ||
if err != nil { | ||
return | ||
} | ||
defer func() { | ||
os.RemoveAll(dir) | ||
}() | ||
fmt.Printf("DB path : %s\n", filepath.Join(dir, "sqlite3.db")) | ||
p := &Sqlite{} | ||
addr := fmt.Sprintf("sqlite3://%s", filepath.Join(dir, "sqlite3.db")) | ||
d, err := p.Open(addr) | ||
if err != nil { | ||
t.Fatalf("%v", err) | ||
} | ||
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db, err := sql.Open("sqlite3", filepath.Join(dir, "sqlite3.db")) | ||
if err != nil { | ||
return | ||
} | ||
defer func() { | ||
if err := db.Close(); err != nil { | ||
return | ||
} | ||
}() | ||
dt.Test(t, d, []byte("CREATE TABLE t (Qty int, Name string);")) | ||
driver, err := WithInstance(db, &Config{}) | ||
if err != nil { | ||
t.Fatalf("%v", err) | ||
} | ||
if err := d.Drop(); err != nil { | ||
t.Fatal(err) | ||
} | ||
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m, err := migrate.NewWithDatabaseInstance( | ||
"file://./migration", | ||
"ql", driver) | ||
if err != nil { | ||
t.Fatalf("%v", err) | ||
} | ||
fmt.Println("UP") | ||
err = m.Up() | ||
if err != nil { | ||
t.Fatalf("%v", err) | ||
} | ||
} |