34283a74e8
Fix #19513 This PR introduce a new db method `InTransaction(context.Context)`, and also builtin check on `db.TxContext` and `db.WithTx`. There is also a new method `db.AutoTx` has been introduced but could be used by other PRs. `WithTx` will always open a new transaction, if a transaction exist in context, return an error. `AutoTx` will try to open a new transaction if no transaction exist in context. That means it will always enter a transaction if there is no error. Co-authored-by: delvh <dev.lh@web.de> Co-authored-by: 6543 <6543@obermui.de>
57 lines
1.5 KiB
Go
57 lines
1.5 KiB
Go
// Copyright 2021 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 system
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import (
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"context"
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"code.gitea.io/gitea/models/db"
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)
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// AppState represents a state record in database
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// if one day we would make Gitea run as a cluster,
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// we can introduce a new field `Scope` here to store different states for different nodes
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type AppState struct {
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ID string `xorm:"pk varchar(200)"`
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Revision int64
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Content string `xorm:"LONGTEXT"`
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}
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func init() {
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db.RegisterModel(new(AppState))
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}
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// SaveAppStateContent saves the app state item to database
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func SaveAppStateContent(key, content string) error {
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return db.WithTx(db.DefaultContext, func(ctx context.Context) error {
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eng := db.GetEngine(ctx)
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// try to update existing row
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res, err := eng.Exec("UPDATE app_state SET revision=revision+1, content=? WHERE id=?", content, key)
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if err != nil {
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return err
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}
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rows, _ := res.RowsAffected()
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if rows != 0 {
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// the existing row is updated, so we can return
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return nil
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}
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// if no existing row, insert a new row
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_, err = eng.Insert(&AppState{ID: key, Content: content})
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return err
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})
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}
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// GetAppStateContent gets an app state from database
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func GetAppStateContent(key string) (content string, err error) {
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e := db.GetEngine(db.DefaultContext)
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appState := &AppState{ID: key}
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has, err := e.Get(appState)
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if err != nil {
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return "", err
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} else if !has {
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return "", nil
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}
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return appState.Content, nil
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}
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