photoprism/internal/entity/entity_update.go

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package entity
import (
"fmt"
)
// Update updates an existing record in the database.
func Update(m interface{}, keyNames ...string) (err error) {
// Unscoped so soft-deleted records can still be updated.
db := UnscopedDb()
// New entity?
if db.NewRecord(m) {
return fmt.Errorf("new record")
}
// Extract interface slice with all values including zero.
values, keys, err := ModelValues(m, keyNames...)
// Has keys and values?
if err != nil {
return err
} else if len(keys) != len(keyNames) {
return fmt.Errorf("record keys missing")
}
// Update values.
result := db.Model(m).Updates(values)
// Successful?
if result.Error != nil {
return err
} else if result.RowsAffected > 1 {
log.Debugf("entity: updated statement affected more than one record - you may have found a bug")
return nil
} else if result.RowsAffected == 1 {
return nil
} else if Count(m, keyNames, keys) != 1 {
return fmt.Errorf("record not found")
}
return err
}