42 lines
1.4 KiB
Python
42 lines
1.4 KiB
Python
from django.contrib.auth import get_user_model
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from django.db import models
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class LockerBank(models.Model):
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name = models.CharField(max_length=200)
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location = models.CharField(max_length=200)
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slug = models.SlugField(unique=True)
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rows = models.PositiveIntegerField()
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columns = models.PositiveIntegerField()
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# TODO: add constraint for unique first letter?
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def __str__(self):
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return f"{self.name} ({self.columns}x{self.rows})"
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@property
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def initial(self):
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return self.name[0].upper()
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@property
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def iter_doors(self):
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for row in range(self.rows):
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for column in range(self.columns):
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# TODO: filter could be optimized
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yield chr(row + ord('A')), column + 1, self.rentals.filter(row=row, column=column)
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class LockerRental(models.Model):
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locker_bank = models.ForeignKey(LockerBank, on_delete=models.CASCADE, related_name="rentals")
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user = models.ForeignKey(get_user_model(), on_delete=models.CASCADE)
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row = models.PositiveIntegerField()
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column = models.PositiveIntegerField()
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# TODO: add check constraint to ensure that row and column are within locker_bank bounds
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# TODO: add unique constraint on (bank, row, column)?
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@property
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def address(self) -> str:
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return f"{self.locker_bank.name}-{self.locker_bank.initial}{chr(self.row + ord('A'))}{self.column}"
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def __str__(self):
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return f"{self.user}: {self.address}"
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