add endpoints to get items by id

kontor-api/src/apis/version1/tysc/vendor.py

@@ -1,6 +1,6 @@
 from typing import List
 
-from fastapi import APIRouter
+from fastapi import APIRouter, HTTPException
 
 from src.db.models.tysc import Vendor
 from src.db.session import SessionDep
@@ -20,3 +20,14 @@ def get_all_vendors(db: SessionDep) -> List[VendorResponse]:
         response = to_response(vendor)
         results.append(response)
     return results
+
+@router.get("/vendors/{vendor_id}", response_model=VendorResponse)
+def get_vendor(vendor_id: str, db: SessionDep) -> VendorResponse:
+    """
+    retrieve vendor by id as json response.
+    """
+    vendor = db.get(Vendor, vendor_id)
+    if vendor is None:
+        raise HTTPException(status_code=404, detail="Vendor could not be found")
+    response = to_response(vendor)
+    return response