Adding automatic attachment point addition

app/crud/iso_thread.py

@@ -8,6 +8,26 @@ async def get(db: AsyncSession, iso_thread_id: int) -> IsoThread | None:
     return await db.get(IsoThread, iso_thread_id)
 
 
+async def get_by_values(
+    db: AsyncSession,
+    *,
+    diameter_mm: float,
+    pitch_mm: float,
+    depth_mm: float | None,
+) -> IsoThread | None:
+    depth_clause = (
+        IsoThread.depth_mm.is_(None) if depth_mm is None else IsoThread.depth_mm == depth_mm
+    )
+    result = await db.execute(
+        select(IsoThread).where(
+            IsoThread.diameter_mm == diameter_mm,
+            IsoThread.pitch_mm == pitch_mm,
+            depth_clause,
+        )
+    )
+    return result.scalar_one_or_none()
+
+
 async def list_all(db: AsyncSession, skip: int = 0, limit: int = 100) -> list[IsoThread]:
     result = await db.execute(
         select(IsoThread).order_by(IsoThread.id).offset(skip).limit(limit)