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