def test_invalid_scalar_index(adata, index):
    # https://github.com/theislab/anndata/issues/619
    with pytest.raises(IndexError, match=r".*index.* out of range\."):
        _ = adata[index]
def add_category():
    form = CategoryForm()

    if form.validate_on_submit():
        form.save()
        flash(_("Category added."), "success")
        return redirect(url_for("management.forums"))

    return render_template("management/category_form.html", form=form,
                           title=_("Add Category"))