Field types (CharField, IntegerField, DateField) in Django

Introduction

Field types define what kind of data each part of your database will hold, like words, numbers, or dates.

When you want to store names or short text, use CharField.

When you need to save whole numbers like age or quantity, use IntegerField.

When you want to keep track of dates like birthdays or event days, use DateField.

Syntax

Django

class ModelName(models.Model):
    field_name = models.CharField(max_length=100)
    field_number = models.IntegerField()
    field_date = models.DateField()

CharField requires a max_length to limit how many characters it can store.

DateField stores dates without time, useful for birthdays or deadlines.

Examples

Stores a short text up to 50 characters, like a person's name.

Django

name = models.CharField(max_length=50)

Stores a whole number, such as someone's age.

Django

age = models.IntegerField()

Stores a date, for example, a birthday.

Django

birth_date = models.DateField()

Sample Program

This model defines a Person with a name, age, and birth date. Each field uses the right type to store the correct kind of data.

Django

from django.db import models

class Person(models.Model):
    name = models.CharField(max_length=100)
    age = models.IntegerField()
    birth_date = models.DateField()

    def __str__(self):
        return f"{self.name}, Age: {self.age}, Born on: {self.birth_date}"

Important Notes

Always set max_length for CharField to avoid errors.

IntegerField only stores whole numbers, no decimals.

DateField expects a date format like YYYY-MM-DD.

Summary

CharField stores text with a max length limit.

IntegerField stores whole numbers.

DateField stores dates without time.