added has_data method

stand/adb.py

@@ -38,4 +38,11 @@ class ArcticLibrary:
         return df
 
 
+    def has_data(self, *args, **kwargs):
+        try:
+            return not self.lib.read(*args, columns=[], **kwargs).data.index.empty
+        except adb.exceptions.NoSuchVersionException:
+            return False
+
+
 

stand/api.py

@@ -25,11 +25,7 @@ def append(beamline: Beamline, pgroup: PGroup, run: int, row: dict[str, Any]):
     index = pd.Timestamp(run) # adb supports update only for timeseries indexes
     index = pd.Index([index], name="run")
 
-    try:
-        run_exists = not lib.read(pgroup, date_range=index, columns=[]).data.index.empty
-    except adb.exceptions.NoSuchVersionException:
-        run_exists = False
-
+    run_exists = lib.has_data(pgroup, date_range=index)
     if run_exists:
         raise HTTPException(HTTPStatus.CONFLICT, f"run {run} exists already in {beamline}/{pgroup}")