from django.db import models

class Classification(models.Model):

    code = models.CharField(max_length=10)

class Employee(models.Model):

    name = models.CharField(max_length=40, blank=False, null=False)

    salary = models.PositiveIntegerField()

    department = models.CharField(max_length=40, blank=False, null=False)

    hire_date = models.DateField(blank=False, null=False)

    age = models.IntegerField(blank=False, null=False)

    classification = models.ForeignKey(

        "Classification", on_delete=models.CASCADE, null=True

    )

    bonus = models.DecimalField(decimal_places=2, max_digits=15, null=True)

class Detail(models.Model):

    value = models.JSONField()

    class Meta:

        required_db_features = {"supports_json_field"}