FloatField — Django Models

Syntax :

 field_name = models.FloatField ( ** options ) 

Django FloatField Model Explanation

FloatField 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.FloatField ()

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

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

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

Now run,

 Python manage.py migrate 

Thus, geeks_field FloatField is created when migrations are run in the project. This is a field for storing a floating point number.

How to use a FloatField?

A FloatField is used to store a floating point number represented in Python by a floating point instance. To learn more about float visit

# model import
# from the geek app

from geeks.models import GeeksModel

 
# create an instance
# float

d = float ( 21.89 )

 
# create an instance
# GeeksModel

geek_object = GeeksModel.objects.create (geeks_field = d)

geek_object.save ()

Now let’s check it out on the admin server. We have created a GeeksModel instance.

Field options

Field parameters — 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 FloatField will allow it to store empty values ​​for that table in a relational database. 
Here are the field options and attributes that the FloatField 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.