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A Django model is a table in your database.

Django Models

Up until now in this tutorial, output has been static data from Python or HTML templates.

Now we will see how Django allows us to work with data, without having to change or upload files in the prosess.

In Django, data is created in objects, called Models, and is actually tables in a database.

Create Table (Model)

To create a model, navigate to the models.py file in the /members/ folder.

Open it, and add a Member table by creating a Member class, and describe the table fields in it:

my_tennis_club/members/models.py:

from django.db import models

 

class Member(models.Model):

  firstname = models.CharField(max_length=255)

  lastname = models.CharField(max_length=255)

The first field, firstname, is a Text field, and will contain the first name of the members.

The second field, lastname, is also a Text field, with the member's last name.

Both firstname and lastname is set up to have a maximum of 255 characters.

SQLite Database

When we created the Django project, we got an empty SQLite database.

It was created in the my_tennis_club root folder, and has the filename db.sqlite3.

By default, all Models created in the Django project will be created as tables in this database.

Migrate

Now when we have described a Model in the models.py file, we must run a command to actually create the table in the database.

Navigate to the /my_tennis_club/ folder and run this command:

py manage.py makemigrations members

Which will result in this output:

Migrations for 'members':
  membersmigrations001_initial.py
    - Create model Member

(myworld) C:UsersYour Namemyworldmy_tennis_club>

Django creates a file describing the changes and stores the file in the /migrations/ folder:

my_tennis_club/members/migrations/0001_initial.py:

# Generated by Django 4.1.2 on 2022-10-27 11:14

 

from django.db import migrations, models

 

 

class Migration(migrations.Migration):

 

    initial = True

 

    dependencies = [

    ]

 

    operations = [

        migrations.CreateModel(

            name='Member',

            fields=[

                ('id', models.BigAutoField(auto_created=True, primary_key=True, serialize=False, verbose_name='ID')),

                ('firstname', models.CharField(max_length=255)),

                ('lastname', models.CharField(max_length=255)),

            ],

        ),

    ]

Note that Django inserts an id field for your tables, which is an auto increment number Django Insert Data

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