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