Django: Writing Model Field-Value into another Models Dropdown List?

Question

I got a Model "PC_Configuration" with a bunch of Dropdown-Lists:

class PC_Configuration(models.Model):
PROCESSOR_CHOICES = (
    ('None', 'Wähle deinen Prozessor'),
    ('1', 'Prozessor1'),
    ('2', 'Prozessor2'),
    ('3', 'Prozessor3'),
)

GRAPHICSCARD_CHOICES = (
    ('None', 'Wähle deine Grafikkarte'),
    ('1', 'Grafikkarte1'),
    ('2', 'Grafikkarte2'),
    ('3', 'Grafikkarte3'),
)

OS_CHOICES = (
    ('None', 'Wähle dein Betriebssystem'),
    ('1', 'Betriebssystem1'),
    ('2', 'Betriebssystem2'),
    ('3', 'Betriebssystem3'),
)

RAM_CHOICES = (
    ('None', 'Wähle deinen Arbeitsspeicher'),
    ('1', 'RAM1'),
    ('2', 'RAM2'),
    ('3', 'RAM3'),
)

HARDDRIVE_CHOICES = (
    ('None', 'Wähle deine Restspeicher-Größe'),
    ('1', 'Festplatte1'),
    ('2', 'Festplatte2'),
    ('3', 'Festplatte3'),
)

processor = models.CharField(max_length=25, choices=PROCESSOR_CHOICES, default='None')
graphicscard = models.CharField(max_length=25, choices=GRAPHICSCARD_CHOICES, default='None')
ram = models.CharField(max_length=25, choices=RAM_CHOICES, default='None')
os = models.CharField(max_length=25, choices=OS_CHOICES, default='None')
harddrive = models.CharField(max_length=25, choices=HARDDRIVE_CHOICES, default='None')

I just tested the Choices of those Dropdown-Fields with some Hardcoded Inputs, but I actually want to get all Data for the Choices of eg the "processors" -Dropdown-Field from the Table of the field name of the Model Processors :

class Processors(models.Model):
name = models.CharField(max_length=50)

So my question is: Is it possible to get all the values inside the name -Fields of the Processors-Model , maybe write them into a Array just like the current Hardcoded Input for being able to show them inside the Dropdown-Field of the PC_Configuration Model?

Short Edit: I've tried to use something like:

list(PC_Configuration.objects.all().values_list('name', flat=True)) 

But it seems like "PC_Configuration.objects" isn't existing..

Answer 1

You can have a ForeignKey to that table in your model lets say:

processor = models.ForeignKey(Processors, models.DO_NOTHING)

Than you can create a model form for PC_Configuration

class MyForm(forms.ModelForm):
    class Meta:
        model = PC_Configuration

    def __init__(self, *args, **kwargs):
        super(MyForm, self).__init__(*args, **kwargs)
        self.fields['processors'].quereset = Processors.objects.all()
        self.fields['processors'].label_from_instance = lambda obj: "%s" % obj.name