"""

Custom column/table names

If your database column name is different than your model attribute, use the

``db_column`` parameter. Note that you'll use the field's name, not its column

name, in API usage.

If your database table name is different than your model name, use the

``db_table`` Meta attribute. This has no effect on the API used to

query the database.

If you need to use a table name for a many-to-many relationship that differs

from the default generated name, use the ``db_table`` parameter on the

``ManyToManyField``. This has no effect on the API for querying the database.

"""

from django.db import models

class Author(models.Model):

    Author_ID = models.AutoField(primary_key=True, db_column="Author ID")

    first_name = models.CharField(max_length=30, db_column="firstname")

    last_name = models.CharField(max_length=30, db_column="last")

    class Meta:

        db_table = "my_author_table"

        ordering = ("last_name", "first_name")

    def __str__(self):

        return "%s %s" % (self.first_name, self.last_name)

class Article(models.Model):

    Article_ID = models.AutoField(primary_key=True, db_column="Article ID")

    headline = models.CharField(max_length=100)

    authors = models.ManyToManyField(Author, db_table="my_m2m_table")

    primary_author = models.ForeignKey(

        Author,

        models.SET_NULL,

        db_column="Author ID",

        related_name="primary_set",

        null=True,

    )

    class Meta:

        ordering = ("headline",)

    def __str__(self):

        return self.headline