Some copy/paste related fixes:

* In firestore compat `doc` function, client variant: if doc path is not provided (we wish a new server-assigned id), pass only the parent node (to prevent empty path crashes)
* In firestore compat `batch` function, bind `this` to returned `commit` methods (for both client and server variant)

packages/client/src/store/actions/copyPaste.ts

@@ -216,6 +216,7 @@ export const pasteSlotsWeek =
       slots.forEach(({ id, date: oldDate, ...slotData }) => {
         const luxonDate = fromISO(oldDate).plus({ weeks: jump });
         const date = luxon2ISODate(luxonDate);
+        console.log("Slot coll ref", slotsCollRef);
         const newSlotRef = doc(slotsCollRef);
         batch.set(newSlotRef, { ...slotData, date });
       });

packages/client/src/utils/firestore/compat.ts

@@ -96,10 +96,12 @@ export const doc = (
       FirestoreDocVariant.client({
         // Even though 'doc' (aliased as 'clientDoc' here) works on both firestore and collection instanceerences,
         // it doesn't work well on unions because of slightly different type overloads, hence the typecast.
-        instance: clientDoc(
-          instance as ClientFirestore,
-          pathSegments.join("/")
-        ),
+        instance: docPath.length
+          ? clientDoc(
+              instance as ClientCollectionReference,
+              docPath.length ? docPath : undefined
+            )
+          : clientDoc(instance as ClientCollectionReference),
       }),
     [FirestoreEnv.Server]: ({ instance }) =>
       FirestoreDocVariant.server({
@@ -235,7 +237,7 @@ export const writeBatch = (db: FirestoreVariant) =>
           }
           return batch.set(doc.instance, data);
         },
-        commit: batch.commit,
+        commit: batch.commit.bind(batch),
       };
     },
     [FirestoreEnv.Server]: ({ instance }) => {
@@ -248,7 +250,7 @@ export const writeBatch = (db: FirestoreVariant) =>
           }
           return batch.set(doc.instance, data);
         },
-        commit: batch.commit,
+        commit: batch.commit.bind(batch),
       };
     },
   });