Added stock page

InvenTree/stock/models.py

@@ -0,0 +1,36 @@
+from __future__ import unicode_literals
+
+from django.db import models
+
+from part.models import Part
+
+class Warehouse(models.Model):
+    name = models.CharField(max_length=100)
+    description = models.CharField(max_length=250, blank=True)
+    parent = models.ForeignKey('self', on_delete=models.CASCADE, blank=True, null=True)
+    
+    def __str__(self):
+        if self.parent:
+            return "/".join([p.name for p in self.path]) + "/" + self.name
+        else:
+            return self.name
+    
+    # Return path of this category
+    @property
+    def path(self):
+        if self.parent:
+            return self.parent.path + [self.parent]
+        else:
+            return []
+    
+class StockItem(models.Model):
+    part = models.ForeignKey(Part, on_delete=models.CASCADE)
+    location = models.ForeignKey(Warehouse, on_delete=models.CASCADE)
+    quantity = models.IntegerField()
+    updated = models.DateField(auto_now=True)
+    
+    def __str__(self):
+        return "{n} x {part} @ {loc}".format(
+            n = self.quantity,
+            part = self.part.name,
+            loc = self.location.name)