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dbgorp.go
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dbgorp.go
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package gorp
import (
"database/sql"
sq "github.com/Masterminds/squirrel"
"github.com/go-gorp/gorp"
"github.com/terhitormanen/revel"
"github.com/terhitormanen/revel/logger"
)
// DB Gorp.
type DbGorp struct {
Map *gorp.DbMap
// The Sql statement builder to use to build select statements
SqlStatementBuilder sq.StatementBuilderType
// Database connection information
Info *DbInfo
// The database initialization function
dbInitFn func(dbMap *DbGorp) error
}
type DbInfo struct {
DbDriver string
DbHost string
DbUser string
DbPassword string
DbName string
DbSchema string
DbConnection string
Dialect gorp.Dialect
}
type (
DbGeneric interface {
Select(i interface{}, query string, args ...interface{}) ([]interface{}, error)
Exec(query string, args ...interface{}) (sql.Result, error)
Insert(list ...interface{}) error
Update(list ...interface{}) (int64, error)
Delete(i ...interface{}) (int64, error)
SelectOne(holder interface{}, query string, args ...interface{}) error
}
DbReadable interface {
Builder() sq.StatementBuilderType
Get(i interface{}, keys ...interface{}) (interface{}, error)
Select(i interface{}, builder sq.SelectBuilder) (l []interface{}, err error)
SelectOne(i interface{}, builder sq.SelectBuilder) (err error)
SelectInt(builder sq.SelectBuilder) (i int64, err error)
GetMap() DbGeneric
Schema() string
}
DbWriteable interface {
DbReadable
Insert(list ...interface{}) error
Update(list ...interface{}) (int64, error)
Delete(i ...interface{}) (int64, error)
ExecUpdate(builder sq.UpdateBuilder) (r sql.Result, err error)
ExecInsert(builder sq.InsertBuilder) (r sql.Result, err error)
}
)
// OpenDb database.
func (dbGorp *DbGorp) OpenDb() (err error) {
db, err := sql.Open(dbGorp.Info.DbDriver, dbGorp.Info.DbConnection)
if err != nil {
moduleLogger.Fatal("Open Database Error", "error", err)
}
// Create the database map
dbGorp.Map = &gorp.DbMap{Db: db, Dialect: dbGorp.Info.Dialect}
revel.OnAppStop(func() {
revel.RevelLog.Info("Closing the database (from module)")
if err := dbGorp.Close(); err != nil {
revel.AppLog.Error("Failed to close the database", "error", err)
}
})
return dbGorp.dbInit()
}
// Create a new database connection and open it from this one.
func (dbGorp *DbGorp) CloneDb(open bool) (newDb *DbGorp, err error) {
dbInfo := *dbGorp.Info
newDb = &DbGorp{Info: &dbInfo}
newDb.dbInitFn = dbGorp.dbInitFn
err = newDb.InitDb(open)
return
}
// Close the database connection.
func (dbGorp *DbGorp) Begin() (txn *Transaction, err error) {
tx, err := dbGorp.Map.Begin()
if err != nil {
return
}
txn = &Transaction{tx, dbGorp}
return
}
// Close the database connection.
func (dbGorp *DbGorp) Close() (err error) {
if dbGorp.Map.Db != nil {
err = dbGorp.Map.Db.Close()
}
return
}
// Called to perform table registration and anything else that needs to be done on a new connection.
func (dbGorp *DbGorp) dbInit() (err error) {
if dbGorp.dbInitFn != nil {
err = dbGorp.dbInitFn(dbGorp)
}
return
}
// Used to specify the init function to call when database is initialized
// Calls the init function immediately.
func (dbGorp *DbGorp) SetDbInit(dbInitFn func(dbMap *DbGorp) error) (err error) {
dbGorp.dbInitFn = dbInitFn
return dbGorp.dbInit()
}
func (dbGorp *DbGorp) Select(i interface{}, builder sq.SelectBuilder) (l []interface{}, err error) {
query, args, err := builder.ToSql()
if err == nil {
list, err := dbGorp.Map.Select(i, query, args...)
if err != nil && gorp.NonFatalError(err) {
return list, nil
}
if err == sql.ErrNoRows {
err = nil
}
return list, err
}
return
}
func (dbGorp *DbGorp) SelectOne(i interface{}, builder sq.SelectBuilder) (err error) {
query, args, err := builder.ToSql()
if err == nil {
err = dbGorp.Map.SelectOne(i, query, args...)
if err != nil && gorp.NonFatalError(err) {
return nil
}
}
return
}
func (dbGorp *DbGorp) SelectInt(builder sq.SelectBuilder) (i int64, err error) {
query, args, err := builder.ToSql()
if err == nil {
i, err = dbGorp.Map.SelectInt(query, args...)
}
return
}
func (dbGorp *DbGorp) ExecUpdate(builder sq.UpdateBuilder) (r sql.Result, err error) {
query, args, err := builder.ToSql()
if err == nil {
r, err = dbGorp.Map.Exec(query, args...)
}
return
}
func (dbGorp *DbGorp) ExecInsert(builder sq.InsertBuilder) (r sql.Result, err error) {
query, args, err := builder.ToSql()
if err == nil {
r, err = dbGorp.Map.Exec(query, args...)
}
return
}
// Shifted some common functions up a level
func (dbGorp *DbGorp) Insert(list ...interface{}) error {
return dbGorp.Map.Insert(list...)
}
func (dbGorp *DbGorp) Update(list ...interface{}) (int64, error) {
return dbGorp.Map.Update(list...)
}
func (dbGorp *DbGorp) Get(i interface{}, keys ...interface{}) (interface{}, error) {
return dbGorp.Map.Get(i, keys...)
}
func (dbGorp *DbGorp) Delete(i ...interface{}) (int64, error) {
return dbGorp.Map.Delete(i...)
}
func (dbGorp *DbGorp) TraceOn(log logger.MultiLogger) {
dbGorp.Map.TraceOn("", &simpleTrace{log.New("section", "gorp")})
}
func (dbGorp *DbGorp) TraceOff() {
}
func (dbGorp *DbGorp) Builder() sq.StatementBuilderType {
return dbGorp.SqlStatementBuilder
}
func (dbGorp *DbGorp) GetMap() DbGeneric {
return dbGorp.Map
}
func (dbGorp *DbGorp) Schema() (result string) {
if dbGorp.Info != nil {
result = dbGorp.Info.DbSchema
}
return
}
type simpleTrace struct {
log logger.MultiLogger
}
func (s *simpleTrace) Printf(format string, v ...interface{}) {
s.log.Infof(format, v...)
}