bugfix: 如果用户删除分组后，分组数据不存在会出现null问题 #273

	# https://github.com/actions/starter-workflows/blob/main/ci/python-publish.yml
	name: Doc Build

	on:
	push:
	branch: ['master']

	permissions:
	contents: write

	jobs:
	deploy:

	runs-on: ubuntu-latest

	steps:
	- name: Checkout
	uses: actions/checkout@v3

	- name: Set up Python
	uses: actions/setup-python@v3
	with:
	python-version: '3.7'

	- name: Install dependencies
	run: \|
	python -m pip install --upgrade pip
	pip install -r doc/requirements.txt

	- name: Build and publish
	run: \|
	cd ./doc && make html && cd ../

	- name: Deploy 🚀
	uses: JamesIves/[email protected]
	with:
	branch: doc # The branch the action should deploy to.
	folder: doc/build/html # The folder the action should deploy.

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