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Move SupplierPart and SupplierPriceBreak to the 'Company' app
- https://docs.djangoproject.com/en/2.2/ref/models/options/#django.db.models.Options.db_table - https://stackoverflow.com/questions/3519143/django-how-to-specify-a-database-for-a-model - And others, presumably
This commit is contained in:
Oliver Walters
@ -32,7 +32,8 @@ import hashlib
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from InvenTree import helpers
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from InvenTree import validators
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from InvenTree.models import InvenTreeTree
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from company.models import Company
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from company.models import SupplierPart
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class PartCategory(InvenTreeTree):
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@ -317,7 +318,7 @@ class Part(models.Model):
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# Default to None if there are multiple suppliers to choose from
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return None
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default_supplier = models.ForeignKey('part.SupplierPart',
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default_supplier = models.ForeignKey(SupplierPart,
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on_delete=models.SET_NULL,
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blank=True, null=True,
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help_text='Default supplier part',
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@ -800,167 +801,3 @@ class BomItem(models.Model):
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return base_quantity + self.get_overage_quantity(base_quantity)
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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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Attributes:
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part: Link to the master Part
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supplier: Company that supplies this SupplierPart object
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SKU: Stock keeping unit (supplier part number)
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manufacturer: Manufacturer name
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MPN: Manufacture part number
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URL: Link to external website for this part
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description: Descriptive notes field
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note: Longer form note field
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base_cost: Base charge added to order independent of quantity e.g. "Reeling Fee"
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multiple: Multiple that the part is provided in
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minimum: MOQ (minimum order quantity) required for purchase
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lead_time: Supplier lead time
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packaging: packaging that the part is supplied in, e.g. "Reel"
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"""
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def get_absolute_url(self):
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return reverse('supplier-part-detail', kwargs={'pk': self.id})
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class Meta:
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unique_together = ('part', 'supplier', 'SKU')
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part = models.ForeignKey(Part, on_delete=models.CASCADE,
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related_name='supplier_parts',
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limit_choices_to={'purchaseable': True},
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help_text='Select part',
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)
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supplier = models.ForeignKey(Company, on_delete=models.CASCADE,
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related_name='parts',
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limit_choices_to={'is_supplier': True},
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help_text='Select supplier',
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)
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SKU = models.CharField(max_length=100, help_text='Supplier stock keeping unit')
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manufacturer = models.CharField(max_length=100, blank=True, help_text='Manufacturer')
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MPN = models.CharField(max_length=100, blank=True, help_text='Manufacturer part number')
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URL = models.URLField(blank=True, help_text='URL for external supplier part link')
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description = models.CharField(max_length=250, blank=True, help_text='Supplier part description')
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note = models.CharField(max_length=100, blank=True, help_text='Notes')
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base_cost = models.DecimalField(max_digits=10, decimal_places=3, default=0, validators=[MinValueValidator(0)], help_text='Minimum charge (e.g. stocking fee)')
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packaging = models.CharField(max_length=50, blank=True, help_text='Part packaging')
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multiple = models.PositiveIntegerField(default=1, validators=[MinValueValidator(1)], help_text='Order multiple')
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minimum = models.PositiveIntegerField(default=1, validators=[MinValueValidator(1)], help_text='Minimum order quantity (MOQ)')
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lead_time = models.DurationField(blank=True, null=True)
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@property
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def manufacturer_string(self):
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items = []
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if self.manufacturer:
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items.append(self.manufacturer)
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if self.MPN:
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items.append(self.MPN)
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return ' | '.join(items)
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@property
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def has_price_breaks(self):
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return self.price_breaks.count() > 0
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@property
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def price_breaks(self):
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""" Return the associated price breaks in the correct order """
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return self.pricebreaks.order_by('quantity').all()
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def get_price(self, quantity, moq=True, multiples=True):
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""" Calculate the supplier price based on quantity price breaks.
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- Don't forget to add in flat-fee cost (base_cost field)
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- If MOQ (minimum order quantity) is required, bump quantity
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- If order multiples are to be observed, then we need to calculate based on that, too
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"""
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price_breaks = self.price_breaks.all()
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# No price break information available?
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if len(price_breaks) == 0:
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return None
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# Minimum ordering requirement
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if moq and self.minimum > quantity:
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quantity = self.minimum
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# Order multiples
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if multiples:
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quantity = int(math.ceil(quantity / self.multipe) * self.multiple)
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pb_found = False
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pb_quantity = -1
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pb_cost = 0.0
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for pb in self.price_breaks.all():
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# Ignore this pricebreak (quantity is too high)
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if pb.quantity > quantity:
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continue
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pb_found = True
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# If this price-break quantity is the largest so far, use it!
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if pb.quantity > pb_quantity:
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pb_quantity = pb.quantity
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pb_cost = pb.cost
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if pb_found:
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cost = pb_cost * quantity
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return cost + self.base_cost
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else:
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return None
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def __str__(self):
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s = "{supplier} ({sku})".format(
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sku=self.SKU,
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supplier=self.supplier.name)
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if self.manufacturer_string:
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s = s + ' - ' + self.manufacturer_string
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return s
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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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Attributes:
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part: Link to a SupplierPart object that this price break applies to
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quantity: Quantity required for price break
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cost: Cost at specified quantity
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"""
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part = models.ForeignKey(SupplierPart, on_delete=models.CASCADE, related_name='pricebreaks')
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quantity = models.PositiveIntegerField(default=1, validators=[MinValueValidator(1)])
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cost = models.DecimalField(max_digits=10, decimal_places=3, validators=[MinValueValidator(0)])
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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} @ {quan}".format(
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mpn=self.part.MPN,
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cost=self.cost,
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quan=self.quantity)
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