如何构造一个 Django model 纯粹由 ticker 关联的其他模型制成的？

Question

How to make up a "parent" model that is solely composed of other models? I am currently thinking to use foreignkey relationships but I don't believe this is the right way to do so.

class BalanceSheet(models.Model):
    ticker = models.ForeignKey(
        Stock, on_delete=models.CASCADE, related_name="balance_sheets"
    )

    assets = models.ForeignKey(Assets, on_delete=models.CASCADE)
    liab_and_stockholders_equity = models.ForeignKey(LiabAndStockholdersEquity, on_delete=models.CASCADE)

    def __str__(self):
        return f"{self.ticker} Balance Sheet"

class Assets(model.Model):
    ticker = models.ForeignKey(
    Stock, on_delete=models.CASCADE, related_name="assets")
    balance_sheet = ????????????????????????????



class Assets(model.Model):
    ticker = models.ForeignKey(
    Stock, on_delete=models.CASCADE, related_name="liab_and_stockholders_equity")
    balance_sheet = ??????????????????????????

Answer 1

I think what you need to do is create a model for the parent table, and there you will have child1 = ForeignKey(Child1, on_delete=models.CASCADE) child2 = ForeignKey(Child2, on_delete=models.CASCADE) and so on for each child, you want to have a connection to. No need to write this in child models, only in the parent.