guild-journal/guild/forms.py

from django import forms
from guild.models import PlaySession, Character


class PlaySessionCharacterForm(forms.ModelMultipleChoiceField):
    def label_from_instance(self, character):
        if character.player:
            return "{} ({})".format(character.name, character.player.name)
        else:
            return character.name


class PlaySessionForm(forms.ModelForm):
    characters = PlaySessionCharacterForm(
        queryset=Character.objects.all(), widget=forms.CheckboxSelectMultiple
    )

    class Meta:
        model = PlaySession
        fields = ["date", "characters", "summary"]
        # set date wideget to type="date"
        widgets = {
            "date": forms.DateInput(attrs={"type": "date"}),
            "summary": forms.Textarea(attrs={"rows": 32}),
        }