photoprism/internal/entity/subjects.go

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package entity
import (
"fmt"
)
// Subjects represents a list of subjects.
type Subjects []Subject
// Delete (soft) deletes all subjects.
func (m Subjects) Delete() error {
for _, subj := range m {
if err := subj.Delete(); err != nil {
return err
}
}
return nil
}
// OrphanPeople returns unused subjects.
func OrphanPeople() (Subjects, error) {
orphans := Subjects{}
err := Db().
Where("subj_type = ?", SubjPerson).
Where(fmt.Sprintf("subj_uid NOT IN (SELECT DISTINCT subj_uid FROM %s)", Marker{}.TableName())).
Find(&orphans).Error
return orphans, err
}
// DeleteOrphanPeople finds and (soft) deletes all unused people.
func DeleteOrphanPeople() (count int, err error) {
subj, err := OrphanPeople()
if err != nil {
return 0, err
}
return len(subj), subj.Delete()
}