Open In App

SmallIntegerField – Django Models

Last Updated : 12 Feb, 2020
Improve
Improve
Like Article
Like
Save
Share
Report

SmallIntegerField is a integer number represented in Python by a int instance. This field is like a IntegerField and supports values from -32768 to 32767. The default form widget for this field is a NumberInput when localize is False or TextInput otherwise. It uses MinValueValidator and MaxValueValidator to validate the input based on the values that the default database supports.

Syntax:

field_name = models.SmallIntegerField(**options)

Django Model SmallIntegerField Explanation

Illustration of SmallIntegerField using an Example. Consider a project named geeksforgeeks having an app named geeks.

Refer to the following articles to check how to create a project and an app in Django.

Enter the following code into models.py file of geeks app.




from django.db import models
from django.db.models import Model
# Create your models here.
  
class GeeksModel(Model):
    geeks_field = models.SmallIntegerField()


Add the geeks app to INSTALLED_APPS




# Application definition
  
INSTALLED_APPS = [
    'django.contrib.admin',
    'django.contrib.auth',
    'django.contrib.contenttypes',
    'django.contrib.sessions',
    'django.contrib.messages',
    'django.contrib.staticfiles',
    'geeks',
]


Now when we run makemigrations command from the terminal,

Python manage.py makemigrations

A new folder named migrations would be created in geeks directory with a file named 0001_initial.py




# Generated by Django 2.2.5 on 2019-09-25 06:00
  
from django.db import migrations, models
  
class Migration(migrations.Migration):
  
    initial = True
  
    dependencies = [
    ]
  
    operations = [
        migrations.CreateModel(
            name ='GeeksModel',
            fields =[
                ('id'
                  models.AutoField(
                  auto_created = True,
                  primary_key = True,
                  serialize = False
                  verbose_name ='ID'
                )),
                ('geeks_field'
                  models.SmallIntegerField()),
            ],
        ),
    ]


Now run,

Python manage.py migrate

Thus, an geeks_field SmallIntegerField is created when you run migrations on the project. It is a field to store small integer numbers.

How to use SmallIntegerField ?

SmallIntegerField is used for storing a integer number represented in Python by a int instance. To know more about int, visit Python | int() function. Let’s try to save a small integer number in SmallIntegerField.




# importing the model
# from geeks app
from geeks.models import GeeksModel
  
# creating an instance of
# int
d = int(2189)
  
# creating a instance of 
# GeeksModel
geek_object = GeeksModel.objects.create(geeks_field = d)
geek_object.save()


Now let’s check it in admin server. We have created an instance of GeeksModel.

SmallIntegerField django models

Field Options

Field Options are the arguments given to each field for applying some constraint or imparting a particular characteristic to a particular Field. For example, adding an argument null = True to SmallIntegerField will enable it to store empty values for that table in relational database.
Here are the field options and attributes that an SmallIntegerField can use.

Field Options Description
Null If True, Django will store empty values as NULL in the database. Default is False.
Blank If True, the field is allowed to be blank. Default is False.
db_column The name of the database column to use for this field. If this isn’t given, Django will use the field’s name.
Default The default value for the field. This can be a value or a callable object. If callable it will be called every time a new object is created.
help_text Extra “help” text to be displayed with the form widget. It’s useful for documentation even if your field isn’t used on a form.
primary_key If True, this field is the primary key for the model.
editable If False, the field will not be displayed in the admin or any other ModelForm. They are also skipped during model validation. Default is True.
error_messages The error_messages argument lets you override the default messages that the field will raise. Pass in a dictionary with keys matching the error messages you want to override.
help_text Extra “help” text to be displayed with the form widget. It’s useful for documentation even if your field isn’t used on a form.
verbose_name A human-readable name for the field. If the verbose name isn’t given, Django will automatically create it using the field’s attribute name, converting underscores to spaces.
validators A list of validators to run for this field. See the validators documentation for more information.
Unique If True, this field must be unique throughout the table.


Previous Article
Next Article

Similar Reads

Django Models | Set - 1
Prerequisites : Django Creating apps Models - According to Django Models, A model is the single, definitive source of information about your data. It contains the essential fields and behaviors of the data you’re storing. Generally, each model maps to a single database table. The basics: Each model is a Python class that subclasses django.db.models
2 min read
Django Models | Set - 2
Model Fields - Model fields define the datatype which will be stored in the provided variable. To store price, the integer type is more suitable. To store height, length etc. float/decimal type is more suitable. To store title or heading, it is better to provide character limit. For writing an article, it is better to have a textbox with no charact
2 min read
Python | Relational fields in Django models
Prerequisite: Django models Django models represent real-world entities, and it is rarely the case that real-world entities are entirely independent of each other. Hence Django supports relational databases and allows us to establish relations between different models. There are three types of relational fields which Django supports: many-to-one, m
4 min read
BigIntegerField - Django Models
BigIntegerField is a 64-bit integer, much like an IntegerField except that it is guaranteed to fit numbers from -9223372036854775808 to 9223372036854775807. The default form widget for this field is a TextInput. Syntax field_name = models.BigIntegerField(**options) Django Model BigIntegerField Explanation Illustration of BigAutoField using an Examp
4 min read
AutoField - Django Models
According to documentation, An AutoField is an IntegerField that automatically increments according to available IDs. One usually won’t need to use this directly because a primary key field will automatically be added to your model if you don’t specify otherwise. By default, Django gives each model the following field: id = models.AutoField(primary
4 min read
BigAutoField - Django Models
BigAutoField is a 64-bit integer, much like an AutoField except that it is guaranteed to fit numbers from 1 to 9223372036854775807. One can create a BigAutoField using the following syntax, id = models.BigAutoField(primary_key=True, **options) This is an auto-incrementing primary key just like AutoField. Django Model BigAutoField Explanation Illust
4 min read
BooleanField - Django Models
BooleanField is a true/false field. It is like a bool field in C/C++. The default form widget for this field is CheckboxInput, or NullBooleanSelect if null=True. The default value of BooleanField is None when Field.default isn’t defined. One can define the default value as true or false by setting the default attribute to true/false simultaneously.
4 min read
CharField - Django Models
CharField is a string field, for small- to large-sized strings. It is like a string field in C/C++. CharField is generally used for storing small strings like first name, last name, etc. To store larger text TextField is used. The default form widget for this field is TextInput. CharField has one extra required argument: CharField.max_length The ma
4 min read
DateField - Django Models
DateField is a field that stores date, represented in Python by a datetime.date instance. As the name suggests, this field is used to store an object of date created in python. The default form widget for this field is a TextInput. The admin can add a JavaScript calendar and a shortcut for “Today” explicitly. Syntax: field_name = models.DateField(*
5 min read
DateTimeField - Django Models
DateTimeField is a date and time field which stores date, represented in Python by a datetime.datetime instance. As the name suggests, this field is used to store an object of datetime created in python. The default form widget for this field is a TextInput. The admin uses two separate TextInput widgets with JavaScript shortcuts. Syntax field_name
5 min read
Practice Tags :