Adding automatic attachment point addition

app/crud/unc_thread.py

@@ -8,6 +8,28 @@ async def get(db: AsyncSession, unc_thread_id: int) -> UncThread | None:
     return await db.get(UncThread, unc_thread_id)
 
 
+async def get_by_values(
+    db: AsyncSession,
+    *,
+    diameter_fraction: str,
+    tpi: int,
+    series: UncSeries,
+    depth_in: float | None,
+) -> UncThread | None:
+    depth_clause = (
+        UncThread.depth_in.is_(None) if depth_in is None else UncThread.depth_in == depth_in
+    )
+    result = await db.execute(
+        select(UncThread).where(
+            UncThread.diameter_fraction == diameter_fraction,
+            UncThread.tpi == tpi,
+            UncThread.series == series,
+            depth_clause,
+        )
+    )
+    return result.scalar_one_or_none()
+
+
 async def list_all(db: AsyncSession, skip: int = 0, limit: int = 100) -> list[UncThread]:
     result = await db.execute(
         select(UncThread).order_by(UncThread.id).offset(skip).limit(limit)