update entire set

entireset.ts

 const [mutate] = useMutation<
    CompleteAllCourses.CompleteCourses
  >(
    COMPLETE_ALL_COURSES,
    {
      update (cache, { data }) {
        const completedCourses = data?.completeAllCourses.courses;
        const allCourses = cache.readQuery<GetAllCourses>({
          query: GET_ALL_COURSES
        }); 

        cache.writeQuery({
          query: GET_ALL_COURSES,
          data: {
            courses: allcourses.map((t) => !!completedCourses
              .find((completed) => completed.id === t.id)
          }
        })
      }
    }
  )