foerderbarometer/input/models.py

from django.db import models


class Volunteer(models.Model):
    realname = models.CharField(max_length=200, null=True)
    email = models.CharField(max_length=200, null=True)
    username = models.CharField(max_length=200, null=True)
    granted = models.BooleanField(null=True)

    @classmethod
    def set_granted(cl, key, b):
        obj = cl.objects.get(pk=key)
        obj.granted = b
        obj.save()

    class Meta:
        abstract = True

class Project(Volunteer):
    name = models.CharField(max_length=200)
    start = models.DateField('start date')

    pid = models.IntegerField(null=True, blank=True) # automaticly generated

    def save(self,*args,**kwargs):
        # is there a way to call super().save() only once?
        super().save(*args,*kwargs)
        self.pid = 10000 + self.pk
        super().save(*args,*kwargs)

    def __str__(self):
        return f"{self.pid} {self.name}" 

class HonoraryCertificate(Volunteer):
    request_url = models.CharField(max_length=2000)
    project = models.ForeignKey(Project, null = True, on_delete = models.SET_NULL)

    def __str__(self):
        return "Certificate for " + self.realname

#abstract class for Library, IFG, ...
class Grant(Volunteer):
    cost = models.CharField(max_length=10)
    notes = models.CharField(max_length=500)

    class Meta:
        abstract = True


TYPE_CHOICES = [('BIB', 'Bibliotheksstipendium'),
           ('ELIT', 'eLiteraturstipendium'),
           ('SOFT', 'Softwarestipendium'),
           ('VIS', 'Visitenkarten'),
           ('LIST', 'Mailingliste'),
           ('MAIL', 'E-Mail-Adresse'),
           ('IFG', 'Kostenübernahme IFG-Anfrage'),
           ('LIT', 'Literaturstipendium'),]

# same model is used for Library, ELitStip and Software!
class Library(Grant):

    type = models.CharField(
        max_length=4,
        choices=TYPE_CHOICES, #attention: actually only BIB, ELIT, SOFT should be used here
        default='LIB',
    )
    library = models.CharField(max_length=200)
    duration = models.CharField(max_length=100)

    def __str__(self):
        return self.library

class IFG(Grant):
    url = models.CharField(max_length=2000)

    def __str__(self):
        return "IFG-Anfrage von " + self.realname