Question

Sorry for probably simple question but I’m a newby in Django and really confused.

I have an ugly legacy tables that I can not change.
It has 2 tables:

class Salespersons(models.Model):
    id = models.IntegerField(unique=True, primary_key=True)
    xsin = models.IntegerField()
    name = models.CharField(max_length=200)
    surname = models.CharField(max_length=200)

class Store(models.Model):
    id = models.IntegerField(unique=True, primary_key=True)
    xsin = models.IntegerField()
    brand = models.CharField(max_length=200)

So I suppose I can not add Foreign keys in class definitions because they change the tables.

I need to execute such sql request:

SELECT * FROM Salespersons, Store INNER JOIN Store ON (Salespersons.xsin = Store.xsin);

How can I achieve it using Django ORM?
Or I’m allowed to get Salespersons and Store separately i.e.

stores = Store.objects.filter(xsin = 1000)
salespersons = Salespersons.objects.filter(xsin = 1000)

Answer 1

Given your example query, are your tables actually named Salespersons/Store?
Anyway, something like this should work:

results = Salespersons.objects.extra(tables=["Store"],
                          where=["""Salespersons.xsin = Store.xsin"""])

However, given the names of the tables/models it doesn’t seem to me that an inner join would be logically correct. Unless you always have just 1 salesperson per store with same xsin.