CPkForeignKey

[Arisophy]

Need to make CpkForeignKey to treate grandchild records.

# GrandChild Model (CpkModel)
#   composite primary key: company_id, country_code, office_code
class CompanyBranchOffice(CPkModel):
    company_branch = CPkForeignKey(
        CompanyBranch,
        primary_key=True,       # for CompositePK
        on_delete=models.CASCADE)
    office_code = models.CharField(
        max_length=100,
        primary_key=True,       # for CompositePK
    )
    name = models.CharField(max_length=100)
    established_date = models.DateField()

    class Meta:
        managed = False  # for CompositePK
        db_table = 'CompanyBranchOffice'
        unique_together = (('company_branch', 'office_code'),)  # for CompositePK