BigIntegerField — Django Models

Michael Zippo

Syntax

 field_name = models.BigIntegerField ( ** options )

Django’s BigIntegerField Model Explanation

BigAutoField illustration using example. Consider a project named pythonengineering that has an application named geeks .

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

How to Create a Basic Project using MVT in Django?

How to Create an App in Django?

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

Add the geek app to INSTALLED_APPS

from django.db import models

from django.db.models import Model

# Create your models here.

class GeeksModel (Model):

geeks_field = models.BigIntegerField ()

# 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 the makemigrations command from the terminal

 Python manage.py makemigrations

In the geeks directory a new folder named migrations will be created with a file named 0001_initial.py

       # Generated by Django 2.2.5 2019- 09-25 06:00  
   
   from   django.db   import   migrations, models 
   
   class   Migration (migrations.Migration):  
   
   initial   =   True  
    
   dependencies   =   [
  ]  
   
   operations   =   [
   migrations.CreateModel (
   name   =   ’GeeksModel’  , 
     fields   =   [
   (  ’big_id’  ,  
   models.BigAutoField (auto_created   =   True  , 
   primary_key   =   True  , 
   serialize   =   False  , 
   verbose_name   =  ’ ID’  
  )), 
   (  ’ geeks_field’  , models.BigIntegerField ()), 
  ], 
  ),  
  ] 
  So the  geeks_field   BigIntegerField  is created when you run makemigrations for the project. This is a field that can store integers ranging from  -9223372036854775808  to  9223372036854775807 . 
  If we create objects of this model from the admin server. we can see geeks_field where numbers can be stored. 
  
  Field options 
  Field options — they are arguments given to each field to apply some constraint or to convey a particular characteristic to a particular field. For example, adding the  null = True  argument to the BigIntegerField will allow it to store empty values for that table in a relational database. 
 Here are the options and attributes BigIntegerfield 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.
 Choices   An iterable (eg, a list or tuple) of 2-tuples to use as choices for this field.  
   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 .  
   Unique   If True, this field must be unique throughout the table.

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.
Choices	An iterable (eg, a list or tuple) of 2-tuples to use as choices for this field.
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 .
Unique	If True, this field must be unique throughout the table.