mirror of
https://github.com/inventree/InvenTree
synced 2024-08-30 18:33:04 +00:00
101 lines
2.8 KiB
Python
101 lines
2.8 KiB
Python
from __future__ import unicode_literals
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from django.db import models
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from django.db.models import Sum
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from django.core.exceptions import ObjectDoesNotExist
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from InvenTree.models import InvenTreeTree
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class PartCategory(InvenTreeTree):
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""" PartCategory provides hierarchical organization of Part objects.
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"""
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class Meta:
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verbose_name = "Part Category"
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verbose_name_plural = "Part Categories"
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class Part(models.Model):
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""" Represents a """
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name = models.CharField(max_length=100)
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description = models.CharField(max_length=250, blank=True)
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IPN = models.CharField(max_length=100, blank=True)
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category = models.ForeignKey(PartCategory, on_delete=models.CASCADE)
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minimum_stock = models.IntegerField(default=0)
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units = models.CharField(max_length=20, default="pcs", blank=True)
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trackable = models.BooleanField(default=False)
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def __str__(self):
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if self.IPN:
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return "{name} ({ipn})".format(
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ipn = self.IPN,
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name = self.name)
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else:
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return self.name
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class Meta:
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verbose_name = "Part"
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verbose_name_plural = "Parts"
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@property
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def stock_list(self):
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""" Return a list of all stock objects associated with this part
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"""
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return self.stockitem_set.all()
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@property
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def stock(self):
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""" Return the total stock quantity for this part.
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Part may be stored in multiple locations
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"""
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stocks = self.stock_list
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if len(stocks) == 0:
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return 0
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result = stocks.aggregate(total=Sum('quantity'))
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return result['total']
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@property
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def projects(self):
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""" Return a list of unique projects that this part is associated with
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"""
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project_ids = set()
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project_parts = self.projectpart_set.all()
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projects = []
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for pp in project_parts:
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if pp.project.id not in project_ids:
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project_ids.add(pp.project.id)
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projects.append(pp.project)
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return projects
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class PartRevision(models.Model):
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""" A PartRevision represents a change-notification to a Part
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A Part may go through several revisions in its lifetime,
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which should be tracked.
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UniqueParts can have a single associated PartRevision
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"""
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part = models.ForeignKey(Part, on_delete=models.CASCADE)
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name = models.CharField(max_length=100)
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description = models.CharField(max_length=500)
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revision_date = models.DateField(auto_now_add = True)
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def __str__(self):
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return self.name |