# Create your models here. After running makemigrations and migrate on Django and rendering the above model, let us create an instance from Django admin interface with string “a“. … More Built-in Field Validations. Field OptionsDescriptionUniqueIf True, this field must be unique throughout the table.unique=True – Django Built-in Field Validation – GeeksforGeeks www.geeksforgeeks.org › uniquetrue-django-built-in-field-validation