/
db_utils.go
100 lines (82 loc) · 1.78 KB
/
db_utils.go
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package service
import (
"fmt"
"strings"
"github.com/jmoiron/sqlx"
"github.com/vertex-center/vertex/core/types"
"github.com/vertex-center/vertex/pkg/log"
"github.com/vertex-center/vlog"
)
func (s *DbService) copyDb(from *sqlx.DB, to *sqlx.DB) error {
dbCopy := types.NewEventDbCopy()
dbCopy.AddTable("admin_settings")
dbCopy.AddTable("migrations")
err := s.ctx.DispatchEventWithErr(dbCopy)
if err != nil {
return err
}
toTx, err := to.Beginx()
if err != nil {
return err
}
for _, t := range dbCopy.All() {
err := s.copyDbTable(t, from, toTx)
if err != nil {
_ = toTx.Rollback()
return err
}
}
return toTx.Commit()
}
func (s *DbService) copyDbTable(name string, from *sqlx.DB, to *sqlx.Tx) error {
log.Info("copying table",
vlog.String("table", name),
vlog.String("from", from.DriverName()),
vlog.String("to", to.DriverName()),
)
rows, err := from.Queryx(fmt.Sprintf("SELECT * FROM %s", name))
if err != nil {
return err
}
defer rows.Close()
// Delete all rows in the table
_, err = to.Exec(fmt.Sprintf("DELETE FROM %s", name))
if err != nil {
return err
}
columns, err := rows.Columns()
if err != nil {
return err
}
for rows.Next() {
var values []string
row := map[string]interface{}{}
err := rows.MapScan(row)
if err != nil {
return err
}
for _, c := range columns {
v := row[c]
if v == nil {
values = append(values, "NULL")
continue
}
if _, ok := v.(string); ok {
values = append(values, fmt.Sprintf("'%s'", v))
continue
}
values = append(values, fmt.Sprintf("%v", v))
}
q := fmt.Sprintf("INSERT INTO %s (%s) VALUES (%s)",
name,
strings.Join(columns, ", "),
strings.Join(values, ", "),
)
log.Debug(q)
_, err = to.Exec(q)
if err != nil {
return err
}
}
return nil
}