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mysql.go
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mysql.go
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package pop
import (
"fmt"
"io"
"os"
"os/exec"
"strings"
// Load MySQL Go driver
_ "github.com/go-sql-driver/mysql"
"github.com/gobuffalo/pop/columns"
"github.com/gobuffalo/pop/fizz"
"github.com/gobuffalo/pop/fizz/translators"
"github.com/jmoiron/sqlx"
"github.com/pkg/errors"
)
var _ dialect = &mysql{}
type mysql struct {
ConnectionDetails *ConnectionDetails
}
func (m *mysql) Details() *ConnectionDetails {
return m.ConnectionDetails
}
func (m *mysql) URL() string {
c := m.ConnectionDetails
if m.ConnectionDetails.URL != "" {
return strings.TrimPrefix(m.ConnectionDetails.URL, "mysql://")
}
s := "%s:%s@(%s:%s)/%s?parseTime=true&multiStatements=true&readTimeout=1s"
return fmt.Sprintf(s, c.User, c.Password, c.Host, c.Port, c.Database)
}
func (m *mysql) urlWithoutDb() string {
c := m.ConnectionDetails
if m.ConnectionDetails.URL != "" {
// respect user's own URL definition (with options).
url := strings.TrimPrefix(m.ConnectionDetails.URL, "mysql://")
return strings.Replace(url, "/"+c.Database+"?", "/?", 1)
}
s := "%s:%s@(%s:%s)/?parseTime=true&multiStatements=true&readTimeout=1s"
return fmt.Sprintf(s, c.User, c.Password, c.Host, c.Port)
}
func (m *mysql) MigrationURL() string {
return m.URL()
}
func (m *mysql) Create(s store, model *Model, cols columns.Columns) error {
return errors.Wrap(genericCreate(s, model, cols), "mysql create")
}
func (m *mysql) Update(s store, model *Model, cols columns.Columns) error {
return errors.Wrap(genericUpdate(s, model, cols), "mysql update")
}
func (m *mysql) Destroy(s store, model *Model) error {
return errors.Wrap(genericDestroy(s, model), "mysql destroy")
}
func (m *mysql) SelectOne(s store, model *Model, query Query) error {
return errors.Wrap(genericSelectOne(s, model, query), "mysql select one")
}
func (m *mysql) SelectMany(s store, models *Model, query Query) error {
return errors.Wrap(genericSelectMany(s, models, query), "mysql select many")
}
// CreateDB creates a new database, from the given connection credentials
func (m *mysql) CreateDB() error {
deets := m.ConnectionDetails
db, err := sqlx.Open(deets.Dialect, m.urlWithoutDb())
if err != nil {
return errors.Wrapf(err, "error creating MySQL database %s", deets.Database)
}
defer db.Close()
query := fmt.Sprintf("CREATE DATABASE `%s` DEFAULT COLLATE `utf8_general_ci`", deets.Database)
Log(query)
_, err = db.Exec(query)
if err != nil {
return errors.Wrapf(err, "error creating MySQL database %s", deets.Database)
}
fmt.Printf("created database %s\n", deets.Database)
return nil
}
// DropDB drops an existing database, from the given connection credentials
func (m *mysql) DropDB() error {
deets := m.ConnectionDetails
db, err := sqlx.Open(deets.Dialect, m.urlWithoutDb())
if err != nil {
return errors.Wrapf(err, "error dropping MySQL database %s", deets.Database)
}
defer db.Close()
query := fmt.Sprintf("DROP DATABASE `%s`", deets.Database)
Log(query)
_, err = db.Exec(query)
if err != nil {
return errors.Wrapf(err, "error dropping MySQL database %s", deets.Database)
}
fmt.Printf("dropped database %s\n", deets.Database)
return nil
}
func (m *mysql) TranslateSQL(sql string) string {
return sql
}
func (m *mysql) FizzTranslator() fizz.Translator {
t := translators.NewMySQL(m.URL(), m.Details().Database)
return t
}
func (m *mysql) Lock(fn func() error) error {
return fn()
}
func (m *mysql) DumpSchema(w io.Writer) error {
deets := m.Details()
cmd := exec.Command("mysqldump", "-d", "-h", deets.Host, "-P", deets.Port, "-u", deets.User, fmt.Sprintf("--password=%s", deets.Password), deets.Database)
if deets.Port == "socket" {
cmd = exec.Command("mysqldump", "-d", "-S", deets.Host, "-u", deets.User, fmt.Sprintf("--password=%s", deets.Password), deets.Database)
}
Log(strings.Join(cmd.Args, " "))
cmd.Stdout = w
cmd.Stderr = os.Stderr
err := cmd.Run()
if err != nil {
return err
}
fmt.Printf("dumped schema for %s\n", m.Details().Database)
return nil
}
func (m *mysql) LoadSchema(r io.Reader) error {
deets := m.Details()
cmd := exec.Command("mysql", "-u", deets.User, fmt.Sprintf("--password=%s", deets.Password), "-h", deets.Host, "-P", deets.Port, "-D", deets.Database)
if deets.Port == "socket" {
cmd = exec.Command("mysql", "-u", deets.User, fmt.Sprintf("--password=%s", deets.Password), "-S", deets.Host, "-D", deets.Database)
}
in, err := cmd.StdinPipe()
if err != nil {
return err
}
go func() {
defer in.Close()
io.Copy(in, r)
}()
Log(strings.Join(cmd.Args, " "))
err = cmd.Start()
if err != nil {
return err
}
err = cmd.Wait()
if err != nil {
return err
}
fmt.Printf("loaded schema for %s\n", m.Details().Database)
return nil
}
func (m *mysql) TruncateAll(tx *Connection) error {
stmts := []struct {
Stmt string `db:"stmt"`
}{}
err := tx.RawQuery(mysqlTruncate, m.Details().Database).All(&stmts)
if err != nil {
return err
}
if len(stmts) == 0 {
return nil
}
qs := []string{}
for _, x := range stmts {
qs = append(qs, x.Stmt)
}
return tx.RawQuery(strings.Join(qs, " ")).Exec()
}
func newMySQL(deets *ConnectionDetails) dialect {
cd := &mysql{
ConnectionDetails: deets,
}
return cd
}
const mysqlTruncate = "SELECT concat('TRUNCATE TABLE `', TABLE_NAME, '`;') as stmt FROM INFORMATION_SCHEMA.TABLES where TABLE_SCHEMA = ?"