108 lines
3.3 KiB
Python
108 lines
3.3 KiB
Python
from django.db import models
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from django.utils import timezone
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class TimeOfDay(models.IntegerChoices):
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"""Integer-backed so that ordering by this field is chronological."""
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MORNING = 1, "Morning"
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NOON = 2, "Noon"
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EVENING = 3, "Evening"
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NIGHT = 4, "Night"
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class Medication(models.Model):
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"""A drug Osiris is on, e.g. "Vetmedin"."""
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name = models.CharField(max_length=100, unique=True)
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is_active = models.BooleanField(
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default=True, help_text="Uncheck when the treatment ends, instead of deleting."
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)
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notes = models.TextField(blank=True)
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created_at = models.DateTimeField(auto_now_add=True)
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class Meta:
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ordering = ["name"]
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def __str__(self):
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return self.name
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class ScheduledDose(models.Model):
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"""One recurring dose of a medication, e.g. "Vetmedin, 1/4, every morning".
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A medication taken morning and evening has two of these.
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"""
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medication = models.ForeignKey(
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Medication, on_delete=models.CASCADE, related_name="scheduled_doses"
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)
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time_of_day = models.IntegerField(choices=TimeOfDay.choices)
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amount = models.CharField(
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max_length=20, default="1/4", help_text='Free text, e.g. "1/4", "1", "5 mg".'
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)
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is_active = models.BooleanField(default=True)
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class Meta:
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ordering = ["medication__name", "time_of_day"]
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constraints = [
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models.UniqueConstraint(
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fields=["medication", "time_of_day"],
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name="unique_medication_time_of_day",
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)
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]
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def __str__(self):
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return f"{self.medication.name} — {self.amount} ({self.get_time_of_day_display().lower()})"
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class DoseLog(models.Model):
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"""Whether a given scheduled dose was actually given on a given day.
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A missing row means "not recorded"; a row with taken=False means "explicitly
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marked as not given", so unchecking a box is distinguishable from never
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having touched it.
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"""
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scheduled_dose = models.ForeignKey(
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ScheduledDose, on_delete=models.CASCADE, related_name="logs"
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)
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date = models.DateField(default=timezone.localdate)
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taken = models.BooleanField(default=True)
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taken_at = models.DateTimeField(null=True, blank=True)
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notes = models.TextField(blank=True)
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class Meta:
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ordering = ["-date", "scheduled_dose__time_of_day"]
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constraints = [
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models.UniqueConstraint(
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fields=["scheduled_dose", "date"], name="unique_dose_per_day"
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)
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]
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def __str__(self):
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state = "given" if self.taken else "missed"
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return f"{self.date} — {self.scheduled_dose} — {state}"
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def save(self, *args, **kwargs):
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if self.taken and self.taken_at is None:
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self.taken_at = timezone.now()
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if not self.taken:
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self.taken_at = None
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return super().save(*args, **kwargs)
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class PulseReading(models.Model):
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"""One heart-rate measurement per day, in beats per minute."""
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date = models.DateField(default=timezone.localdate, unique=True)
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bpm = models.PositiveSmallIntegerField(help_text="Beats per minute.")
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notes = models.TextField(blank=True)
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created_at = models.DateTimeField(auto_now_add=True)
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class Meta:
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ordering = ["-date"]
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def __str__(self):
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return f"{self.date} — {self.bpm} bpm"
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