Building A Blog Website With Django Part 3 – isengkoding.com

Before doing this tutorial, make sure you finish part one and part two.

Now we will create a app name “blog”. Run this in your terminal inside root folder.

python manage.py startapp blog

Our current folders and files.

Object-Relational Mapping (ORM)

Object-Relational Mapping (ORM) is a programming technique that helps connect relational databases with object-oriented programming languages. It serves as a bridge between your code and the database, enabling you to interact with data using objects instead of writing raw SQL queries. Django using ORM interacts with its database models to add, delete, modify, and query objects. Now we will create the database models for our blog app.

Open file “myblog/blog/models.py”

from django.db import models

class Category(models.Model):
    name = models.CharField(max_length=50)

    class Meta:
        verbose_name_plural = "categories"

    def __str__(self):
        return self.name
    
class Post(models.Model):
    title = models.CharField(max_length=255)
    body = models.TextField()
    created_on = models.DateTimeField(auto_now_add=True)
    last_modified_on = models.DateTimeField(auto_now=True)
    categories = models.ManyToManyField("Category", related_name="posts")

    def __str__(self):
        return self.title

Before we migrate our pending blog database, open file “myblog/blogproject/settings.py” and write this code below into INSTALLED_APPS array. The word “blog” is a folder inside myblog, and “apps” is a python file inside blog folder. The word “BlogConfig” is a class name in apps.py.

'blog.apps.BlogConfig'

Now let’s migrate and synchronize database by running this two instructions in terminal.

python manage.py makemigrations blog

python manage.py migrate blog

We want Post and Category to be displayed on admin dashboard so we can add, update and delete it.

Open file “myblog/blog/admin.py”

from django.contrib import admin
from blog.models import Category,Post

class CategoryAdmin(admin.ModelAdmin):
    pass

class PostAdmin(admin.ModelAdmin):
    pass

class CommentAdmin(admin.ModelAdmin):
    pass

admin.site.register(Category,CategoryAdmin)
admin.site.register(Post,PostAdmin)

This is what adding in our admin dashboard point of view.