voidwalker/db/init.go

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package db
import (
"database/sql"
"fmt"
"voidwalker/configs"
"voidwalker/migration"
_ "github.com/go-sql-driver/mysql" // import mysql
"github.com/lbryio/lbry.go/v2/extras/errors"
migrate "github.com/rubenv/sql-migrate"
log "github.com/sirupsen/logrus"
"github.com/volatiletech/sqlboiler/boil"
)
// Init initializes a database connection based on the dsn provided. It also sets it as the global db connection.
func Init(debug bool) (*QueryLogger, error) {
conf := configs.Configuration
dbConn, err := sql.Open("mysql", fmt.Sprintf(
"%s:%s@tcp(%s:3306)/%s?parseTime=1&collation=utf8mb4_unicode_ci",
conf.Voidwalker.User,
conf.Voidwalker.Password,
conf.Voidwalker.Host,
conf.Voidwalker.Database,
))
if err != nil {
return nil, errors.Err(err)
}
err = dbConn.Ping()
if err != nil {
return nil, errors.Err(err)
}
logWrapper := &QueryLogger{DB: dbConn}
if debug {
boil.DebugMode = true
}
boil.SetDB(dbConn)
migrations := &migrate.AssetMigrationSource{
Asset: migration.Asset,
AssetDir: migration.AssetDir,
Dir: "migration",
}
n, migrationErr := migrate.Exec(dbConn, "mysql", migrations, migrate.Up)
if migrationErr != nil {
return nil, errors.Err(migrationErr)
}
log.Printf("Applied %d migrations", n)
return logWrapper, nil
}
func dbInitConnection(dsn string, driverName string, debug bool) (*sql.DB, *QueryLogger, error) {
dsn += "?parseTime=1&collation=utf8mb4_unicode_ci"
dbConn, err := sql.Open(driverName, dsn)
if err != nil {
return nil, nil, errors.Err(err)
}
err = dbConn.Ping()
if err != nil {
return nil, nil, errors.Err(err)
}
logWrapper := &QueryLogger{DB: dbConn}
if debug {
logWrapper.Logger = log.StandardLogger()
//boil.DebugMode = true // this just prints everything twice
}
return dbConn, logWrapper, nil
}
// CloseDB is a wrapper function to allow error handle when it is usually deferred.
func CloseDB(db *QueryLogger) {
if err := db.Close(); err != nil {
log.Error("Closing DB Error: ", err)
}
}