How to use Python to build the chart display function of CMS system

How to use Python to build the chart display function of the CMS system

With the development of the Internet, the Content Management System (CMS for short) system has become the infrastructure of many websites and applications. With the explosive growth of data, chart display function has gradually become an important requirement. This article will introduce how to use Python to build a CMS system and add chart display functions.

First, we need to choose a Python CMS framework. Django is a very popular choice with its powerful features and rich community support. To install Django, just use the pip command:

pip install django

After the installation is complete, we can start creating a new Django project. Open a command line terminal, change to a suitable directory, and run the following command:

django-admin startproject mycms

This will create a Django project named mycms. Next, we need to create a new application that will handle the functionality and pages of our CMS system. Run the following command:

cd mycms
python manage.py startapp charts

This will create an application called charts in our project.

In our application, we will add a model called chart to store the chart's data. In the charts/models.py file, add the following code:

from django.db import models

class Chart(models.Model):
    name = models.CharField(max_length=100)
    data = models.TextField()
    created_at = models.DateTimeField(auto_now_add=True)

    def __str__(self):
        return self.name

Here we define a name, data and creation time for the chart. Next, we need to run the following command to migrate the database to update the model:

python manage.py makemigrations
python manage.py migrate

Now, we can create and manage the chart’s data in the CMS system. Open the charts/admin.py file and add the following code:

from django.contrib import admin
from .models import Chart

admin.site.register(Chart)

This will add a chart model to Django's admin backend, allowing us to easily create and edit data.

Next, we need to create a view function to render the chart page. In the charts/views.py file, add the following code:

from django.shortcuts import render
from .models import Chart

def chart_view(request):
    charts = Chart.objects.all()
    return render(request, 'chart.html', {'charts': charts})

Here we get all the chart objects from the database and pass them to a template called chart.html. Next, create a template file named chart.html and add the following code:

{% for chart in charts %}
    <div>
        <h3 id="chart-name">{{ chart.name }}</h3>
        <p>{{ chart.data }}</p>
        <p>{{ chart.created_at }}</p>
    </div>
    <hr>
{% empty %}
    <p>No charts available.</p>
{% endfor %}

Here we display the name, data and creation time of each chart on the page by using Django's template engine . If no charts are available, the message "No charts available." will be displayed.

Now, we have completed the chart display function in the CMS system. We can further extend this functionality by introducing a charting library (such as Chart.js or Plotly) to draw charts.

The above is a brief introduction to the chart display function of building a CMS system using Python. By using the Django framework, creating models, managing background and view functions, we can easily create and display chart data. I hope this article can inspire you and help you build a more powerful and rich CMS system.

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