mirror of
https://github.com/nottinghamtec/PyRIGS.git
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92 lines
3.1 KiB
Python
92 lines
3.1 KiB
Python
from django.db import models
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from django.urls import reverse
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class AssetCategory(models.Model):
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class Meta:
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verbose_name = 'Asset Category'
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verbose_name_plural = 'Asset Categories'
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name = models.CharField(max_length=80)
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def __str__(self):
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return self.name
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class AssetStatus(models.Model):
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class Meta:
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verbose_name = 'Asset Status'
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verbose_name_plural = 'Asset Statuses'
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name = models.CharField(max_length=80)
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def __str__(self):
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return self.name
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class Supplier(models.Model):
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name = models.CharField(max_length=80)
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def get_absolute_url(self):
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return reverse('supplier_list')
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def __str__(self):
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return self.name
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class BaseAsset(models.Model):
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class Meta:
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abstract = True
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parent = models.ForeignKey(to='self', related_name='asset_parent', blank=True, null=True, on_delete=models.SET_NULL)
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asset_id = models.CharField(max_length=10)
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description = models.CharField(max_length=120)
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category = models.ForeignKey(to=AssetCategory, on_delete=models.CASCADE)
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status = models.ForeignKey(to=AssetStatus, on_delete=models.CASCADE)
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serial_number = models.CharField(max_length=150, blank=True)
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purchased_from = models.ForeignKey(to=Supplier, on_delete=models.CASCADE, blank=True, null=True)
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date_acquired = models.DateField()
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date_sold = models.DateField(blank=True, null=True)
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purchase_price = models.DecimalField(blank=True, null=True, decimal_places=2, max_digits=10)
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salvage_value = models.DecimalField(blank=True, null=True, decimal_places=2, max_digits=10)
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comments = models.TextField(blank=True)
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next_sched_maint = models.DateField(blank=True, null=True)
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# Cable assets
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is_cable = models.BooleanField(default=False)
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length = models.DecimalField(decimal_places=1, max_digits=10, blank=True, null=True)
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def get_absolute_url(self):
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return reverse('asset_detail', kwargs={'pk': self.pk})
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def __str__(self):
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return str(self.asset_id) + ' - ' + self.description
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class Asset(BaseAsset):
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pass
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class Connector(models.Model):
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description = models.CharField(max_length=80)
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current_rating = models.DecimalField(decimal_places=2, max_digits=10, help_text='Amps')
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voltage_rating = models.IntegerField(help_text='Volts')
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num_pins = models.IntegerField(blank=True, null=True)
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def __str__(self):
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return self.description
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class Cable(BaseAsset):
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plug = models.ForeignKey(Connector, on_delete=models.SET_NULL, related_name='plug', null=True)
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socket = models.ForeignKey(Connector, on_delete=models.SET_NULL, related_name='socket', null=True)
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length = models.DecimalField(decimal_places=1, max_digits=10, blank=True, null=True, help_text='m')
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csa = models.DecimalField(decimal_places=2, max_digits=10, blank=True, null=True, help_text='mm^2')
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circuits = models.IntegerField(blank=True, null=True)
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cores = models.IntegerField(blank=True, null=True)
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def cable_resistance(self):
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rho = 0.0000000168
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return (rho * self.length) / (self.csa * 1000000)
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def __str__(self):
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return '{} - {}m - {}'.format(self.plug, self.length, self.socket)
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