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90 lines
2.7 KiB
Python
90 lines
2.7 KiB
Python
from __future__ import unicode_literals
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from django.db import models
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from InvenTree.models import Company
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from part.models import Part
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class Supplier(Company):
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""" Represents a manufacturer or supplier
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"""
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pass
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class Manufacturer(Company):
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""" Represents a manfufacturer
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"""
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pass
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class Customer(Company):
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""" Represents a customer
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"""
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pass
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class SupplierPart(models.Model):
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""" Represents a unique part as provided by a Supplier
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Each SupplierPart is identified by a MPN (Manufacturer Part Number)
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Each SupplierPart is also linked to a Part object
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- A Part may be available from multiple suppliers
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"""
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class Meta:
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unique_together = ('part', 'supplier', 'SKU')
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part = models.ForeignKey(Part, null=True, blank=True, on_delete=models.CASCADE)
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supplier = models.ForeignKey(Supplier, on_delete=models.CASCADE)
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SKU = models.CharField(max_length=100)
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manufacturer = models.ForeignKey(Manufacturer, blank=True, null=True, on_delete=models.CASCADE)
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MPN = models.CharField(max_length=100, blank=True)
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URL = models.URLField(blank=True)
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description = models.CharField(max_length=250, blank=True)
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# Default price for a single unit
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single_price = models.DecimalField(max_digits=10, decimal_places=3, default=0)
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# Base charge added to order independent of quantity e.g. "Reeling Fee"
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base_cost = models.DecimalField(max_digits=10, decimal_places=3, default=0)
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# packaging that the part is supplied in, e.g. "Reel"
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packaging = models.CharField(max_length=50, blank=True)
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# multiple that the part is provided in
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multiple = models.PositiveIntegerField(default=1)
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# Mimumum number required to order
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minimum = models.PositiveIntegerField(default=1)
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# lead time for parts that cannot be delivered immediately
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lead_time = models.DurationField(blank=True, null=True)
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def __str__(self):
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return "{sku} - {supplier}".format(
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sku=self.SKU,
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supplier=self.supplier.name)
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class SupplierPriceBreak(models.Model):
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""" Represents a quantity price break for a SupplierPart
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- Suppliers can offer discounts at larger quantities
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- SupplierPart(s) may have zero-or-more associated SupplierPriceBreak(s)
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"""
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part = models.ForeignKey(SupplierPart, on_delete=models.CASCADE, related_name='price_breaks')
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quantity = models.PositiveIntegerField()
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cost = models.DecimalField(max_digits=10, decimal_places=3)
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class Meta:
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unique_together = ("part", "quantity")
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def __str__(self):
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return "{mpn} - {cost}{currency} @ {quan}".format(
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mpn=self.part.MPN,
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cost=self.cost,
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currency=self.currency if self.currency else '',
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quan=self.quantity)
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