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feat(#248): add merge/delete/count native queries to TagRepository

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Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
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Marcel
2026-04-16 22:15:14 +02:00
parent a05d9c22ae
commit b9b572436a
1 changed files with 65 additions and 0 deletions
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65
backend/src/main/java/org/raddatz/familienarchiv/repository/TagRepository.java
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@@ -1,11 +1,13 @@
package org.raddatz.familienarchiv.repository;
import java.util.Collection;
import java.util.List;
import java.util.Optional;
import java.util.UUID;
import org.raddatz.familienarchiv.model.Tag;
import org.springframework.data.jpa.repository.JpaRepository;
import org.springframework.data.jpa.repository.Modifying;
import org.springframework.data.jpa.repository.Query;
import org.springframework.data.repository.query.Param;
@@ -51,4 +53,67 @@ public interface TagRepository extends JpaRepository<Tag, UUID> {
SELECT id FROM descendants
""", nativeQuery = true)
List<UUID> findDescendantIdsByName(@Param("name") String name);
/**
* Returns the IDs of the tag with the given ID AND all of its descendants
* via a recursive CTE. Used for merge validation and subtree delete.
* Includes a depth guard of 50 levels to prevent runaway queries.
*/
@Query(value = """
WITH RECURSIVE descendants AS (
SELECT id, 0 AS depth FROM tag WHERE id = :tagId
UNION ALL
SELECT t.id, d.depth + 1 FROM tag t
JOIN descendants d ON t.parent_id = d.id
WHERE d.depth < 50
)
SELECT id FROM descendants
""", nativeQuery = true)
List<UUID> findDescendantIds(@Param("tagId") UUID tagId);
/**
* Reassigns document_tags rows from source to target, skipping rows where
* the target tag is already present (to avoid PK conflicts).
*/
@Modifying(clearAutomatically = true)
@Query(value = """
UPDATE document_tags
SET tag_id = :targetId
WHERE tag_id = :sourceId
AND NOT EXISTS (
SELECT 1 FROM document_tags d2
WHERE d2.document_id = document_tags.document_id
AND d2.tag_id = :targetId
)
""", nativeQuery = true)
void reassignDocumentTags(@Param("sourceId") UUID sourceId, @Param("targetId") UUID targetId);
/**
* Removes all document_tags rows for the given tag.
*/
@Modifying(clearAutomatically = true)
@Query(value = "DELETE FROM document_tags WHERE tag_id = :tagId", nativeQuery = true)
void deleteDocumentTagsByTagId(@Param("tagId") UUID tagId);
/**
* Removes all document_tags rows for the given collection of tag IDs.
* Caller must guard against an empty collection — PostgreSQL rejects IN ().
*/
@Modifying(clearAutomatically = true)
@Query(value = "DELETE FROM document_tags WHERE tag_id IN :ids", nativeQuery = true)
void deleteDocumentTagsByTagIds(@Param("ids") Collection<UUID> ids);
/**
* Re-parents all direct children of sourceId to targetId.
*/
@Modifying(clearAutomatically = true)
@Query(value = "UPDATE tag SET parent_id = :targetId WHERE parent_id = :sourceId", nativeQuery = true)
void reparentChildren(@Param("sourceId") UUID sourceId, @Param("targetId") UUID targetId);
/**
* Returns (tag_id, count) pairs for all tags that appear in document_tags.
* Used to populate documentCount in the tag tree without N+1 queries.
*/
@Query(value = "SELECT tag_id, COUNT(*) FROM document_tags GROUP BY tag_id", nativeQuery = true)
List<Object[]> findDocumentCountsPerTag();
}