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// SPDX-FileCopyrightText: 2026 Stefan Majewsky <majewsky@gmx.net>
// SPDX-License-Identifier: Apache-2.0
package oblast
import (
"fmt"
"reflect"
"strings"
)
// MissingRecordError is returned by [Store.Update] if one of the rows to be updated does not exist in the DB.
type MissingRecordError[R any] struct {
// The record that was provided to [Store.Update],
// but for which no row with the same primary key values could be located.
Record R
plan plan
}
// Error implements the builtin/error interface.
func (e MissingRecordError[R]) Error() string {
keyDescs := make([]string, len(e.plan.PrimaryKeyColumnNames))
v := reflect.ValueOf(e.Record)
for idx, columnName := range e.plan.PrimaryKeyColumnNames {
keyDescs[idx] = fmt.Sprintf("%s = %#v", columnName, v.FieldByIndex(e.plan.IndexByColumnName[columnName]))
}
return "could not UPDATE record that does not exist in the database: " + strings.Join(keyDescs, ", ")
}
// An error type that optionally contains either one of the following or both:
// - a core error from an IO operation (e.g. a database read)
// - an auxiliary error from closing or otherwise cleaning up the respective IO handle
type ioError struct {
MainError error
CleanupError error
CleanupOperation string
}
func newIOError(err error, cleanupOperation string, cleanupErr error) error {
if err == nil && cleanupErr == nil {
return nil
}
return ioError{err, cleanupErr, cleanupOperation}
}
// Error implements the builtin/error interface.
func (e ioError) Error() string {
switch {
case e.CleanupError == nil:
return e.MainError.Error()
case e.MainError == nil:
return fmt.Sprintf("during %s(): %s", e.CleanupOperation, e.CleanupError.Error())
default:
return fmt.Sprintf("%s (additional error during %s(): %s)", e.MainError.Error(), e.CleanupOperation, e.CleanupError.Error())
}
}
// Unwrap implements the interface implied by the documentation of package errors.
func (e ioError) Unwrap() []error {
result := make([]error, 0, 2)
if e.MainError != nil {
result = append(result, e.MainError)
}
if e.CleanupError != nil {
result = append(result, e.CleanupError)
}
return result
}
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