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BigIntegerField — Django Models

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.

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.

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