Superset throws unexpected error while loading filters in a dashboard. about superset HOT 1 OPEN

@Thoufiqkhan Hello there! I'm here to help you with any bugs, questions, or becoming a contributor. Let's tackle this together!

To resolve the JavaScript runtime error "Cannot read properties of undefined (reading 'filter')" that occurs while loading filters in an Apache Superset dashboard, you need to ensure that the dataMask object is properly defined and not undefined before calling the filter method on it.

In the provided code, the useNativeFiltersDataMask function is where the filter method is used on dataMask. To prevent the error, you should add a check to ensure dataMask is defined before attempting to use the filter method.

Here is the modified useNativeFiltersDataMask function with the necessary check:

export const useNativeFiltersDataMask = () => {
  const dataMask = useSelector<RootState, DataMaskStateWithId>(
    state => state.dataMask,
  );

  return useMemo(
    () =>
      dataMask
        ? Object.values(dataMask)
            .filter((item: DataMaskWithId) =>
              String(item.id).startsWith(NATIVE_FILTER_PREFIX),
            )
            .reduce(
              (prev, next: DataMaskWithId) => ({ ...prev, [next.id]: next }),
              {},
            ) as DataMaskStateWithId
        : {},
    [dataMask],
  );
};

Additionally, ensure that the dataMask object is correctly initialized and populated in the relevant parts of your codebase. For example, in the createHandleSave function, make sure that the defaultDataMask is set properly:

defaultDataMask: formInputs.defaultDataMask ?? getInitialDataMask(),

Moreover, you can refer to the superset-frontend/src/dashboard/components/nativeFilters/utils.ts file for additional context on how filters are managed and applied in Apache Superset. This file includes functions like getFormData, mergeExtraFormData, and getExtraFormData which handle the form data and extra form data for filters. Ensuring these functions are correctly implemented and that dataMask and other related objects are properly managed can help prevent such runtime errors ^[1][2][3][4].

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