Editing User:Niraj/Teaching-25

'''Teaching lesson plan 25 Subject: Python programming'''

'''Date: 12 Feb 2024'''

'''Time: 60 minutes'''

'''Period: 3rd'''

'''Teaching Item: Introduction to Django Models'''

'''Class: Bachelor'''

'''Objective:''' 

Students will learn the fundamentals of Django models, including defining models, creating database tables, performing CRUD operations, and understanding relationships between models.

'''Materials Needed:'''

* Python installed (preferably Python 3.x)
* Text editor or integrated development environment (IDE) such as VSCode, PyCharm, or Sublime Text
* Django framework installed (<code>pip install django</code>)
* Projector

'''1. Introduction to Django Models (15 mins)'''

* Overview of Django models:
** Django models represent database tables and their relationships.
** Models are defined using Python classes that inherit from <code>django.db.models.Model</code>.
* Discuss the importance of models in Django projects and their role in data persistence.

'''2. Defining Models (20 mins)'''

* Creating a Django app for models: <code>python manage.py startapp myapp</code>
* Defining model classes:
** Define model fields to represent database columns.
** Specify field types (e.g., CharField, IntegerField, ForeignKey).
** Add meta options such as <code>verbose_name</code> and <code>verbose_name_plural</code>.
* Example: Creating a <code>Book</code> model with fields like <code>title</code>, <code>author</code>, <code>published_date</code>, etc.

'''3. Migrations and Database Schema (20 mins)'''

* Generating migrations: <code>python manage.py makemigrations</code>
* Applying migrations to create database tables: <code>python manage.py migrate</code>
* Understanding migration files and their role in database schema evolution.
* Discussing how Django manages database schema changes over time.

'''4. Performing CRUD Operations (25 mins)'''

* Creating records:
** Using model classes to create new records.
** Saving records to the database using the <code>save()</code> method.
* Retrieving records:
** Querying records using the model's <code>objects</code> manager.
** Filtering records based on specific criteria using <code>filter()</code>, <code>get()</code>, and <code>exclude()</code>.
* Updating records:
** Retrieving records, modifying their attributes, and saving them back to the database.
* Deleting records:
** Deleting records using the <code>delete()</code> method or bulk delete operations.

'''5. Model Relationships (25 mins)'''

* One-to-Many (ForeignKey) relationship:
** Defining relationships between models using ForeignKey fields.
** Understanding the concept of related objects and reverse relationships.
* Many-to-Many relationship:
** Defining many-to-many relationships using ManyToManyField.
** Accessing related objects using querysets and reverse relationships.
* One-to-One relationship:
** Defining one-to-one relationships using OneToOneField.
** Use cases and examples of one-to-one relationships.

'''6. Exercise: Create and Manipulate Models (20 mins)'''

* Provide a hands-on exercise where students create Django models and perform CRUD operations.
* Task:
** Define multiple models representing real-world entities (e.g., Book, Author, Publisher).
** Create relationships between models (e.g., Book has an Author).
** Write Python code to create, retrieve, update, and delete records using Django models.

'''7. Conclusion (10 mins)'''

* Recap the key points covered in the lesson:
** Django models represent database tables and define the structure of data.
** Migrations are used to manage changes to the database schema over time.
** CRUD operations (Create, Retrieve, Update, Delete) can be performed using Django model objects.
** Relationships between models enable complex data modeling and querying.
* Encourage students to practice creating models and performing CRUD operations in their Django projects.