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Allow detect whether it's in a database transaction for a context.Context (#21756)

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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>
This commit is contained in:
Lunny Xiao
2022-11-13 04:18:50 +08:00
committed by GitHub
parent a0a425a13b
commit 34283a74e8
91 changed files with 252 additions and 176 deletions
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2
models/system/appstate.go
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@@ -25,7 +25,7 @@ func init() {
// SaveAppStateContent saves the app state item to database
func SaveAppStateContent(key, content string) error {
return db.WithTx(func(ctx context.Context) error {
return db.WithTx(db.DefaultContext, func(ctx context.Context) error {
eng := db.GetEngine(ctx)
// try to update existing row
res, err := eng.Exec("UPDATE app_state SET revision=revision+1, content=? WHERE id=?", content, key)