fix: 조합 필터링 로직 수정

src/repositories/partRepository.js

@@ -72,18 +72,24 @@ const PartRepository = {
 
   async getFilteredCombinations(queryValues) {
     const query = `
+    WITH input_parts AS (
+      SELECT array_agg(unnest) AS required_parts
+      FROM unnest($1::int[]) AS unnest
+    ),
+    parts AS (
       SELECT
-      c.id AS combination_id,
-      array_agg(r.part_id) AS partIds
-    FROM combinations c
-    LEFT JOIN relations r ON c.id = r.combination_id
-    WHERE r.combination_id IN (
-      SELECT DISTINCT combination_id
+        combination_id,
+        array_agg(part_id ORDER BY part_id) AS existing_parts
       FROM relations
-      WHERE part_id = ANY($1::int[])
+      GROUP BY combination_id
     )
-    GROUP BY c.id;
+    SELECT 
+      p.combination_id,
+      p.existing_parts AS partIds
+    FROM parts p, input_parts i
+    WHERE p.existing_parts @> i.required_parts;
   `;
+
     const result = await pool.query(query, queryValues);
     return result.rows;
   },