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
}
}
}
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
}
}