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// Copyright 2019 The Gitea Authors. All rights reserved.
// Use of this source code is governed by a MIT-style
// license that can be found in the LICENSE file.
package models
import (
"code.gitea.io/gitea/modules/setting"
"xorm.io/builder"
)
// DBContext represents a db context
type DBContext struct {
e Engine
}
// DefaultDBContext represents a DBContext with default Engine
func DefaultDBContext() DBContext {
return DBContext{x}
}
// Committer represents an interface to Commit or Close the dbcontext
type Committer interface {
Commit() error
Close()
}
// TxDBContext represents a transaction DBContext
func TxDBContext() (DBContext, Committer, error) {
sess := x.NewSession()
if err := sess.Begin(); err != nil {
sess.Close()
return DBContext{}, nil, err
}
return DBContext{sess}, sess, nil
}
// WithContext represents executing database operations
func WithContext(f func(ctx DBContext) error) error {
return f(DBContext{x})
}
// WithTx represents executing database operations on a trasaction
func WithTx(f func(ctx DBContext) error) error {
sess := x.NewSession()
if err := sess.Begin(); err != nil {
sess.Close()
return err
}
if err := f(DBContext{sess}); err != nil {
sess.Close()
return err
}
err := sess.Commit()
sess.Close()
return err
}
// Iterate iterates the databases and doing something
func Iterate(ctx DBContext, tableBean interface{}, cond builder.Cond, fun func(idx int, bean interface{}) error) error {
return ctx.e.Where(cond).
BufferSize(setting.Database.IterateBufferSize).
Iterate(tableBean, fun)
}
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