Borrowing-TrackerBackend/equipment_tracker/equipments/models.py

57 lines
2.5 KiB
Python

from django.db import models
from django.utils.timezone import now
from simple_history.models import HistoricalRecords
from django.db.models.signals import post_migrate
from django.dispatch import receiver
class Equipment(models.Model):
EQUIPMENT_CATEGORY_CHOICES = (
('Glassware', 'Glassware'),
('Miscellaneous', 'Miscellaneous')
)
name = models.CharField(max_length=40)
category = models.CharField(
max_length=20, choices=EQUIPMENT_CATEGORY_CHOICES, default='Miscellaneous')
description = models.TextField(max_length=512, null=True)
date_added = models.DateTimeField(default=now, editable=False)
last_updated = models.DateTimeField(auto_now=True, editable=False)
history = HistoricalRecords()
def __str__(self):
return f'{self.name} ID:{self.id}'
class EquipmentInstance(models.Model):
EQUIPMENT_INSTANCE_STATUS_CHOICES = (
('Available', 'Available'),
('Broken', 'Broken'),
('Borrowed', 'Borrowed'),
)
equipment = models.ForeignKey(Equipment, on_delete=models.CASCADE)
status = models.CharField(
max_length=20, choices=EQUIPMENT_INSTANCE_STATUS_CHOICES, default='Available')
remarks = models.TextField(max_length=512, null=True)
date_added = models.DateTimeField(default=now, editable=False)
last_updated = models.DateTimeField(auto_now=True, editable=False)
history = HistoricalRecords()
def __str__(self):
return f'{self.equipment.name} ID:{self.id}'
@receiver(post_migrate)
def create_superuser(sender, **kwargs):
if sender.name == 'equipments':
EQUIPMENT, CREATED = Equipment.objects.get_or_create(
name="Pyrex Beaker", description="", category="Glassware")
EQUIPMENT_INSTANCE, CREATED = EquipmentInstance.objects.get_or_create(
equipment=EQUIPMENT, status="Available", remarks="First beaker of equipment tracker!")
EQUIPMENT, CREATED = Equipment.objects.get_or_create(
name="Bunsen Burner", description="", category="Miscellaneous")
EQUIPMENT_INSTANCE, CREATED = EquipmentInstance.objects.get_or_create(
equipment=EQUIPMENT, status="Available", remarks="First bunsen burner of equipment tracker!")
EQUIPMENT, CREATED = Equipment.objects.get_or_create(
name="Microscope", description="", category="Miscellaneous")
EQUIPMENT_INSTANCE, CREATED = EquipmentInstance.objects.get_or_create(
equipment=EQUIPMENT, status="Available", remarks="First microscope of equipment tracker!")