EmailField – Django Models
Last Updated :
19 Sep, 2023
EmailField is a CharField that checks the value for a valid email address using EmailValidator. EmailValidator validates a email through predefined regex which checks ‘@’ and a ‘.’ defined after it. One can change the regex by exploring options from EmailValidator itself. Syntax
field_name = models.EmailField(max_length=254, **options)
EmailField has one extra required argument:
EmailField.max_length
The maximum length (in characters) of the field. The max_length is enforced at the database level and in Django’s validation using MaxLengthValidator.
Django Model EmailField Explanation
Illustration of EmailField 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.
Python3
from django.db import models
from django.db.models import Model
class GeeksModel(Model):
geeks_field = models.EmailField(max_length = 254 )
|
Add the geeks app to INSTALLED_APPS
Python3
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
Python3
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.EmailField( max_length = 254 )),
],
),
]
|
Now run,
Python manage.py migrate
Thus, an geeks_field EmailField is created when you run migrations on the project. It is a field to store email address in database.
How to use EmailField ?
EmailField is used for storing an email address in the database. One can store email id form any domain. Let’s try storing an email id instance in model created above.
Python3
from geeks.models import GeeksModel
d = "abc@gmail.com"
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.
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 EmailField will enable it to store empty values for that table in relational database. Here are the field options and attributes that a EmailField can use.
.math-table { border-collapse: collapse; width: 100%; } .math-table td { border: 1px solid #5fb962; text-align: left !important; padding: 8px; } .math-table th { border: 1px solid #5fb962; padding: 8px; } .math-table tr>th{ background-color: #c6ebd9; vertical-align: middle; } .math-table tr:nth-child(odd) { background-color: #ffffff; }
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. |
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. |
Share your thoughts in the comments
Please Login to comment...