Question

I have the following models defined:

class Team(models.Model):
    Name = models.CharField(max_length=250)

class Fixture(models.Model):
    HomeTeam = models.ForeignKey(Team, related_name="HomeTeam")
    AwayTeam = models.ForeignKey(Team, related_name="AwayTeam")
    HomeTeamScore = models.IntegerField(blank=True, null=True)
    AwayTeamScore = models.IntegerField(blank=True, null=True)
    Date = models.DateTimeField()

class Prediction(models.Model):
    Fixture = models.ForeignKey(Fixture)
    PredictHomeTeam = models.IntegerField()
    PredictAwayTeam = models.IntegerField()
    PredictionDate = models.DateTimeField()
    User = models.ForeignKey(User)

So if use a filter to get 6 fixtures based on Date then I would like to pass these into a formset of PredictionForm but I am struggling on how to pass in the fixture since it is required as a foreignkey field.

This is my first django project so I guess I am also looking for confirmation on whether I am on the right lines with using formsets for this.

Answer 1

You want to use a model formset which works just like a normal formset but understands how to work with models.

from django.forms.models import modelformset_factory
PredictionFormSet = modelformset_factory(Prediction)

The formset documentation describes how to use initial data with your formset:

PredictionFormSet(initial=[{'Fixture': fixture, 'User': user}])

Just as a note, use lowercase and underscores for all of your class method/attributes. Instead of this:

Fixture = models.ForeignKey(Fixture)

Do this:

fixture = models.ForeignKey(Fixture)

This makes it easier to read and reason about your code for other programmers. You should read PEP 8 which is the official Python style guide.