87 lines
3.1 KiB
Python
87 lines
3.1 KiB
Python
from django.db import models
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from django.core.validators import MinValueValidator
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class Category(models.Model):
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name = models.CharField(max_length=100)
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description = models.TextField(blank=True)
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created_at = models.DateTimeField(auto_now_add=True)
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def __str__(self):
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return self.name
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class UnitOfMeasure(models.Model):
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name = models.CharField(max_length=50)
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abbreviation = models.CharField(max_length=10)
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def __str__(self):
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return self.name
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class Product(models.Model):
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PRODUCT_TYPES = [
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('raw_material', 'Raw Material'),
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('finished_good', 'Finished Good'),
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('component', 'Component'),
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]
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code = models.CharField(max_length=50, unique=True)
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name = models.CharField(max_length=200)
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description = models.TextField(blank=True)
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category = models.ForeignKey(Category, on_delete=models.SET_NULL, null=True, blank=True)
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unit_of_measure = models.ForeignKey(UnitOfMeasure, on_delete=models.SET_NULL, null=True)
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product_type = models.CharField(max_length=20, choices=PRODUCT_TYPES)
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reorder_level = models.DecimalField(max_digits=10, decimal_places=2, default=0)
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selling_price = models.DecimalField(max_digits=10, decimal_places=2, null=True, blank=True)
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cost_price = models.DecimalField(max_digits=10, decimal_places=2, null=True, blank=True)
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is_active = models.BooleanField(default=True)
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created_at = models.DateTimeField(auto_now_add=True)
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updated_at = models.DateTimeField(auto_now=True)
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def __str__(self):
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return f"{self.code} - {self.name}"
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class Warehouse(models.Model):
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name = models.CharField(max_length=100)
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location = models.CharField(max_length=200)
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is_active = models.BooleanField(default=True)
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created_at = models.DateTimeField(auto_now_add=True)
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def __str__(self):
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return self.name
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class Inventory(models.Model):
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product = models.ForeignKey(Product, on_delete=models.CASCADE)
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warehouse = models.ForeignKey(Warehouse, on_delete=models.CASCADE)
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quantity = models.DecimalField(max_digits=10, decimal_places=2, default=0)
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reserved_quantity = models.DecimalField(max_digits=10, decimal_places=2, default=0)
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updated_at = models.DateTimeField(auto_now=True)
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class Meta:
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unique_together = ('product', 'warehouse')
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@property
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def available_quantity(self):
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return self.quantity - self.reserved_quantity
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class StockMovement(models.Model):
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MOVEMENT_TYPES = [
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('in', 'Stock In'),
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('out', 'Stock Out'),
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('adjustment', 'Adjustment'),
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('transfer', 'Transfer'),
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]
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product = models.ForeignKey(Product, on_delete=models.CASCADE)
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warehouse = models.ForeignKey(Warehouse, on_delete=models.CASCADE)
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movement_type = models.CharField(max_length=20, choices=MOVEMENT_TYPES)
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quantity = models.DecimalField(max_digits=10, decimal_places=2)
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reference_number = models.CharField(max_length=100, blank=True)
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notes = models.TextField(blank=True)
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created_by = models.ForeignKey('accounts.User', on_delete=models.SET_NULL, null=True)
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created_at = models.DateTimeField(auto_now_add=True)
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