forked from gitea/gitea
44 lines
860 B
Go
44 lines
860 B
Go
// Copyright 2022 The Gitea Authors. All rights reserved.
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// SPDX-License-Identifier: MIT
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package db
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import (
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"context"
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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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// Iterate iterate all the Bean object
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func Iterate[Bean any](ctx context.Context, cond builder.Cond, f func(ctx context.Context, bean *Bean) error) error {
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var start int
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batchSize := setting.Database.IterateBufferSize
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sess := GetEngine(ctx)
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for {
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select {
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case <-ctx.Done():
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return ctx.Err()
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default:
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beans := make([]*Bean, 0, batchSize)
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if cond != nil {
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sess = sess.Where(cond)
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}
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if err := sess.Limit(batchSize, start).Find(&beans); err != nil {
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return err
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}
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if len(beans) == 0 {
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return nil
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}
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start += len(beans)
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for _, bean := range beans {
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if err := f(ctx, bean); err != nil {
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return err
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}
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}
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}
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}
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}
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