Exemplo n.º 1
0
func (driver *Driver) Migrate(f file.File, pipe chan interface{}) {
	var err error
	defer func() {
		if err != nil {
			// Invert version direction if we couldn't apply the changes for some reason.
			if err := driver.version(f.Direction, true); err != nil {
				pipe <- err
			}
			pipe <- err
		}
		close(pipe)
	}()

	pipe <- f
	if err = driver.version(f.Direction, false); err != nil {
		return
	}

	if err = f.ReadContent(); err != nil {
		return
	}

	for _, query := range strings.Split(string(f.Content), ";") {
		query = strings.TrimSpace(query)
		if len(query) == 0 {
			continue
		}

		if err = driver.session.Query(query).Exec(); err != nil {
			return
		}
	}
}
Exemplo n.º 2
0
func (driver *Driver) Migrate(f file.File, pipe chan interface{}) {
	defer close(pipe)
	pipe <- f

	// http://go-database-sql.org/modifying.html, Working with Transactions
	// You should not mingle the use of transaction-related functions such as Begin() and Commit() with SQL statements such as BEGIN and COMMIT in your SQL code.
	tx, err := driver.db.Begin()
	if err != nil {
		pipe <- err
		return
	}

	if f.Direction == direction.Up {
		if _, err := tx.Exec("INSERT INTO "+tableName+" (version) VALUES (?)", f.Version); err != nil {
			pipe <- err
			if err := tx.Rollback(); err != nil {
				pipe <- err
			}
			return
		}
	} else if f.Direction == direction.Down {
		if _, err := tx.Exec("DELETE FROM "+tableName+" WHERE version = ?", f.Version); err != nil {
			pipe <- err
			if err := tx.Rollback(); err != nil {
				pipe <- err
			}
			return
		}
	}

	if err := f.ReadContent(); err != nil {
		pipe <- err
		return
	}
	f.Content = bytes.TrimSpace(f.Content)

	if driver.multiStatements && len(f.Content) > 0 {
		if _, err := tx.Exec(string(f.Content)); err != nil {
			pipe <- err
			if err := tx.Rollback(); err != nil {
				pipe <- err
			}
			return
		}
	} else {
		if err := driver.multiStatementsFallback(f.Content, tx); err != nil {
			pipe <- err
			if err := tx.Rollback(); err != nil {
				pipe <- err
			}
			return
		}
	}

	if err := tx.Commit(); err != nil {
		pipe <- err
		return
	}
}
Exemplo n.º 3
0
func (driver *Driver) Migrate(f file.File, pipe chan interface{}) {
	defer close(pipe)
	pipe <- f

	tx, err := driver.db.Begin()
	if err != nil {
		pipe <- err
		return
	}

	if f.Direction == direction.Up {
		if _, err := tx.Exec("INSERT INTO "+tableName+" (version) VALUES ($1)", f.Version); err != nil {
			pipe <- err
			if err := tx.Rollback(); err != nil {
				pipe <- err
			}
			return
		}
	} else if f.Direction == direction.Down {
		if _, err := tx.Exec("DELETE FROM "+tableName+" WHERE version=$1", f.Version); err != nil {
			pipe <- err
			if err := tx.Rollback(); err != nil {
				pipe <- err
			}
			return
		}
	}

	if err := f.ReadContent(); err != nil {
		pipe <- err
		return
	}

	if _, err := tx.Exec(string(f.Content)); err != nil {
		pqErr := err.(*pq.Error)
		offset, err := strconv.Atoi(pqErr.Position)
		if err == nil && offset >= 0 {
			lineNo, columnNo := file.LineColumnFromOffset(f.Content, offset-1)
			errorPart := file.LinesBeforeAndAfter(f.Content, lineNo, 5, 5, true)
			pipe <- errors.New(fmt.Sprintf("%s %v: %s in line %v, column %v:\n\n%s", pqErr.Severity, pqErr.Code, pqErr.Message, lineNo, columnNo, string(errorPart)))
		} else {
			pipe <- errors.New(fmt.Sprintf("%s %v: %s", pqErr.Severity, pqErr.Code, pqErr.Message))
		}

		if err := tx.Rollback(); err != nil {
			pipe <- err
		}
		return
	}

	if err := tx.Commit(); err != nil {
		pipe <- err
		return
	}
}