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.