Django models for school timetable? - django

Question

I am building a school timetable app for each room? There are my models. Is there anything i am missing?
class Building(models.Model):
bid = models.CharField(max_length=10, primary_key=True)
name = models.CharField(max_length=255, unique=True)
class Meta:
ordering = ['bid']
def __str__(self):
return f'{self.bid}'
class Room(models.Model):
building = models.ForeignKey(Building, on_delete=models.CASCADE,
related_name='rooms')
number = models.PositiveIntegerField()
availability = models.BooleanField(default=False)
power = models.BooleanField(default=False)
class Meta:
ordering = ['building', 'number']
unique_together = ['building', 'number']
def __str__(self):
return f'{self.building.bid}/{self.number}'
class Occurrence(models.Model):
date = models.DateField('Date')
start_period = models.ForeignKey(Period, on_delete=models.CASCADE, related_name='start_at')
end_period = models.ForeignKey(Period, on_delete=models.CASCADE, related_name='end_at')
class Meta:
abstract = True
class Period(models.Model):
start = models.TimeField()
end = models.TimeField()
objects = PeriodManager()
class Meta:
ordering = ['start']
def __str__(self):
return f'{self.start}-{self.end}'
def check_time(self):
return True if self.start < self.end else False
def check_overlap(self):
pass
class TimetableModel(models.Model):
class Meta:
abstract =True
There will be a model name Booking which extends from Occurrence to allow students register to use a room in periods. I would like to make a Timetable model link to a Room Model for providing to context for rendering different weeks timetable for a room and Period models which are resemble school periods. Any advises?

Answer 1

I think you may need to re-think your actual models and what you're trying to achieve.
Having a look at your models you seemed to create models for different aspects of what you're trying to do but there doesn't seems to be coherence between the models.
For instance one way to look at it would be as follows:
Building
- Name
Room
- Number
- Building (FK)
Booking
- Room
- Period (you could just have statically defined list assume these are fixed)
- Duration (number of periods, this removes the need to specify end as you can calculate it.
To make a booking you need to know the following:
- The room you want to book
- The period you want to use it
- How long you'd like to book it for (ie. 2 periods)
From a data perspective that's probably the simplest models you can build (simple is always better). In terms of showing what is available you can do that at the point where you're making a booking (booking form).
I hope that gives you some idea of how to approach this, I didn't create models in this answer as I think your question wasn't really a technical how to but more of a point in the right direction.