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"""
Using a custom primary key
By default, Django adds an ``"id"`` field to each model. But you can override
this behavior by explicitly adding ``primary_key=True`` to a field.
"""
from django.db import models
from .fields import MyAutoField, MyWrapperField
class Employee(models.Model):
employee_code = models.IntegerField(primary_key=True, db_column="code")
first_name = models.CharField(max_length=20)
last_name = models.CharField(max_length=20)
class Meta:
ordering = ("last_name", "first_name")
def __str__(self):
return "%s %s" % (self.first_name, self.last_name)
class Business(models.Model):
name = models.CharField(max_length=20, primary_key=True)
employees = models.ManyToManyField(Employee)
class Meta:
verbose_name_plural = "businesses"
class Bar(models.Model):
id = MyWrapperField(primary_key=True, db_index=True)
class Foo(models.Model):
bar = models.ForeignKey(Bar, models.CASCADE)
class CustomAutoFieldModel(models.Model):
id = MyAutoField(primary_key=True)
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