如何将条形图添加到基于Django的数据库？

from django.db import models

class BarChart(models.Model):
    data = models.TextField()

python manage.py makemigrations
python manage.py migrate

import matplotlib.pyplot as plt
from .models import BarChart

def bar_chart_view(request):
    data = BarChart.objects.first().data  # 获取数据库中的数据
    # 解析数据并生成条形图
    # ...

    # 将生成的条形图保存为图片文件
    plt.savefig('bar_chart.png')

    return render(request, 'bar_chart.html')

<img src="{% static 'bar_chart.png' %}" alt="Bar Chart">

from django.urls import path
from .views import bar_chart_view

urlpatterns = [
    path('bar-chart/', bar_chart_view, name='bar_chart'),
]