forms.py:

from django import forms
from .models import Customers


class CustomerEnrollment(forms.ModelForm):

    class Meta:
        model = Customers
        fields = ('name', 'address', 'contact_no', 'email', 'sport_name', 'applied_date')

        widgets = {
            'name': forms.CharField(attrs={'class': 'form-control', 'placeholder':'Enter Your Name',
                                                    'onfocus':'this.placeholder = " "',
                                                    'onblur':'this.placeholder = "Enter Your Name"'}),
            'address': forms.CharField(attrs={'class': 'form-control', 'placeholder': 'Enter your mail ID',
                                                    'onfocus': 'this.placeholder = " "',
                                                    'onblur': 'this.placeholder = "Enter your mail ID"'}),
            'contact_no': forms.IntegerField(attrs={'class': 'form-control', 'placeholder': 'Enter your Contact No',
                                                    'onfocus': 'this.placeholder = " "',
                                                    'onblur': 'this.placeholder = "Enter your Contact No"', 'required':'True'}),
        }


models:
class Customers(models.Model):
    name = models.CharField(default="-", max_length=50)
    email = models.EmailField()
    address = models.CharField(max_length=200, null=True)
    contact_no = models.PositiveIntegerField(validators=[MaxValueValidator(999999999999)], null=True)
    sport_name = models.CharField(max_length=100, null=True)
    applied_date = models.DateField()
    confirmation_status = models.BooleanField(default=False)

    def __str__(self):
        return self.name

    class Meta:
        verbose_name_plural = "Customers"