Merge pull request #488 from SchrodingersGat/mptt

Mptt

InvenTree/InvenTree/models.py

@@ -11,10 +11,12 @@ from rest_framework.exceptions import ValidationError
 from django.db.models.signals import pre_delete
 from django.dispatch import receiver
 
+from mptt.models import MPTTModel, TreeForeignKey
+
 from .validators import validate_tree_name
 
 
-class InvenTreeTree(models.Model):
+class InvenTreeTree(MPTTModel):
     """ Provides an abstracted self-referencing tree model for data categories.
 
     - Each Category has one parent Category, which can be blank (for a top-level Category).
@@ -30,6 +32,9 @@ class InvenTreeTree(models.Model):
         abstract = True
         unique_together = ('name', 'parent')
 
+    class MPTTMeta:
+        order_insertion_by = ['name']
+
     name = models.CharField(
         blank=False,
         max_length=100,
@@ -43,11 +48,11 @@ class InvenTreeTree(models.Model):
     )
 
     # When a category is deleted, graft the children onto its parent
-    parent = models.ForeignKey('self',
-                               on_delete=models.DO_NOTHING,
-                               blank=True,
-                               null=True,
-                               related_name='children')
+    parent = TreeForeignKey('self',
+                            on_delete=models.DO_NOTHING,
+                            blank=True,
+                            null=True,
+                            related_name='children')
 
     @property
     def item_count(self):
@@ -60,59 +65,31 @@ class InvenTreeTree(models.Model):
         """
         return 0
 
-    def getUniqueParents(self, unique=None):
+    def getUniqueParents(self):
         """ Return a flat set of all parent items that exist above this node.
         If any parents are repeated (which would be very bad!), the process is halted
         """
 
-        item = self
+        return self.get_ancestors()
 
-        # Prevent infinite regression
-        max_parents = 500
-
-        unique = set()
-
-        while item.parent and max_parents > 0:
-            max_parents -= 1
-
-            unique.add(item.parent.id)
-            item = item.parent
-
-        return unique
-
-    def getUniqueChildren(self, unique=None, include_self=True):
+    def getUniqueChildren(self, include_self=True):
         """ Return a flat set of all child items that exist under this node.
         If any child items are repeated, the repetitions are omitted.
         """
 
-        if unique is None:
-            unique = set()
-
-        if self.id in unique:
-            return unique
-
-        if include_self:
-            unique.add(self.id)
-
-        # Some magic to get around the limitations of abstract models
-        contents = ContentType.objects.get_for_model(type(self))
-        children = contents.get_all_objects_for_this_type(parent=self.id)
-
-        for child in children:
-            child.getUniqueChildren(unique)
-
-        return unique
+        return self.get_descendants(include_self=include_self)
 
     @property
     def has_children(self):
         """ True if there are any children under this item """
-        return self.children.count() > 0
+        return self.getUniqueChildren(include_self=False).count() > 0
 
     def getAcceptableParents(self):
         """ Returns a list of acceptable parent items within this model
         Acceptable parents are ones which are not underneath this item.
         Setting the parent of an item to its own child results in recursion.
         """
+
         contents = ContentType.objects.get_for_model(type(self))
 
         available = contents.get_all_objects_for_this_type()
@@ -136,10 +113,7 @@ class InvenTreeTree(models.Model):
             List of category names from the top level to the parent of this category
         """
 
-        if self.parent:
-            return self.parent.parentpath + [self.parent]
-        else:
-            return []
+        return [a for a in self.get_ancestors()]
 
     @property
     def path(self):
@@ -183,7 +157,7 @@ class InvenTreeTree(models.Model):
             pass
 
         # Ensure that the new parent is not already a child
-        if self.id in self.getUniqueChildren(include_self=False):
+        if self.pk is not None and self.id in self.getUniqueChildren(include_self=False):
             raise ValidationError("Category cannot set a child as parent")
 
     def __str__(self):

InvenTree/InvenTree/settings.py

@@ -58,9 +58,7 @@ cors_opt = CONFIG.get('cors', None)
 if cors_opt:
     CORS_ORIGIN_ALLOW_ALL = cors_opt.get('allow_all', False)
 
-    if CORS_ORIGIN_ALLOW_ALL:
-        eprint("Warning: CORS requests are allowed for any domain!")
-    else:
+    if not CORS_ORIGIN_ALLOW_ALL:
         CORS_ORIGIN_WHITELIST = cors_opt.get('whitelist', [])
 
 if DEBUG:
@@ -100,6 +98,7 @@ INSTALLED_APPS = [
     'import_export',                # Import / export tables to file
     'django_cleanup',               # Automatically delete orphaned MEDIA files
     'qr_code',                      # Generate QR codes
+    'mptt',                         # Modified Preorder Tree Traversal
 ]
 
 LOGGING = {

InvenTree/InvenTree/static/script/inventree/bom.js

@@ -330,7 +330,9 @@ function loadBomTable(table, options) {
                 },
                 {
                     method: 'PATCH',
-                    reloadOnSuccess: true
+                    success: function() {
+                        reloadBomTable(table);
+                    }
                 }
             );
         });

InvenTree/part/fixtures/category.yaml

@@ -6,7 +6,11 @@
     name: Electronics
     description: Electronic components
     parent: null
-    default_location: 1  # Home
+    default_location: 1
+    level: 0
+    tree_id: 1
+    lft: 1
+    rght: 12
 
 - model: part.partcategory
   pk: 2
@@ -15,6 +19,10 @@
     description: Resistors
     parent: 1
     default_location: null
+    level: 1
+    tree_id: 1
+    lft: 2
+    rght: 3
 
 - model: part.partcategory
   pk: 3
@@ -23,6 +31,10 @@
     description: Capacitors
     parent: 1
     default_location: null
+    level: 1
+    tree_id: 1
+    lft: 4
+    rght: 5
 
 - model: part.partcategory
   pk: 4
@@ -31,6 +43,10 @@
     description: Integrated Circuits
     parent: 1
     default_location: null
+    level: 1
+    tree_id: 1
+    lft: 6
+    rght: 11
 
 - model: part.partcategory
   pk: 5
@@ -39,6 +55,10 @@
     description: Microcontrollers
     parent: 4
     default_location: null
+    level: 2
+    tree_id: 1
+    lft: 7
+    rght: 8
 
 - model: part.partcategory
   pk: 6
@@ -47,6 +67,10 @@
     description: Communication interfaces
     parent: 4
     default_location: null
+    level: 2
+    tree_id: 1
+    lft: 9
+    rght: 10
 
 - model: part.partcategory
   pk: 7
@@ -54,6 +78,10 @@
     name: Mechanical
     description: Mechanical componenets
     default_location: null
+    level: 0
+    tree_id: 2
+    lft: 1
+    rght: 4
     
 - model: part.partcategory
   pk: 8
@@ -62,3 +90,7 @@
     description: Screws, bolts, etc
     parent: 7
     default_location: 5
+    level: 1
+    tree_id: 2
+    lft: 2
+    rght: 3

InvenTree/part/fixtures/params.yaml

@@ -0,0 +1,32 @@
+# Create some PartParameter templtes
+
+- model: part.PartParameterTemplate
+  pk: 1
+  fields:
+    name: Length
+    units: mm
+
+- model: part.PartParameterTemplate
+  pk: 2
+  fields:
+    name: Width
+    units: mm
+
+- model: part.PartParameterTemplate
+  pk: 3
+  fields:
+    name: Thickness
+    units: mm
+
+# And some parameters (requires part.yaml)
+- model: part.PartParameter
+  fields:
+    part: 1
+    template: 1
+    data: 4
+
+- model: part.PartParameter
+  fields:
+    part: 2
+    template: 1
+    data: 12

InvenTree/part/fixtures/part.yaml

@@ -60,3 +60,7 @@
     description: 'Can we build it?'
     assembly: true
     purchaseable: false
+    category: 7
+    active: False
+    IPN: BOB
+    revision: A2

InvenTree/part/migrations/0019_auto_20190908_0404.py

@@ -0,0 +1,37 @@
+# Generated by Django 2.2.5 on 2019-09-08 04:04
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('part', '0018_auto_20190907_0941'),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name='partcategory',
+            name='level',
+            field=models.PositiveIntegerField(default=0, editable=False),
+            preserve_default=False,
+        ),
+        migrations.AddField(
+            model_name='partcategory',
+            name='lft',
+            field=models.PositiveIntegerField(default=0, editable=False),
+            preserve_default=False,
+        ),
+        migrations.AddField(
+            model_name='partcategory',
+            name='rght',
+            field=models.PositiveIntegerField(default=0, editable=False),
+            preserve_default=False,
+        ),
+        migrations.AddField(
+            model_name='partcategory',
+            name='tree_id',
+            field=models.PositiveIntegerField(db_index=True, default=0, editable=False),
+            preserve_default=False,
+        ),
+    ]

InvenTree/part/migrations/0020_auto_20190908_0404.py

@@ -0,0 +1,21 @@
+# Generated by Django 2.2.5 on 2019-09-08 04:04
+
+from django.db import migrations
+from part import models
+
+
+def update_tree(apps, schema_editor):
+    # Update the PartCategory MPTT model
+
+    models.PartCategory.objects.rebuild()
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('part', '0019_auto_20190908_0404'),
+    ]
+
+    operations = [
+        migrations.RunPython(update_tree)
+    ]

InvenTree/part/migrations/0021_auto_20190908_0916.py

@@ -0,0 +1,30 @@
+# Generated by Django 2.2.5 on 2019-09-08 09:16
+
+from django.db import migrations
+import django.db.models.deletion
+import mptt.fields
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('part', '0020_auto_20190908_0404'),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name='part',
+            name='category',
+            field=mptt.fields.TreeForeignKey(blank=True, help_text='Part category', null=True, on_delete=django.db.models.deletion.DO_NOTHING, related_name='parts', to='part.PartCategory'),
+        ),
+        migrations.AlterField(
+            model_name='part',
+            name='default_location',
+            field=mptt.fields.TreeForeignKey(blank=True, help_text='Where is this item normally stored?', null=True, on_delete=django.db.models.deletion.SET_NULL, related_name='default_parts', to='stock.StockLocation'),
+        ),
+        migrations.AlterField(
+            model_name='partcategory',
+            name='default_location',
+            field=mptt.fields.TreeForeignKey(blank=True, help_text='Default location for parts in this category', null=True, on_delete=django.db.models.deletion.SET_NULL, related_name='default_categories', to='stock.StockLocation'),
+        ),
+    ]

InvenTree/part/migrations/0022_auto_20190908_0918.py

@@ -0,0 +1,20 @@
+# Generated by Django 2.2.5 on 2019-09-08 09:18
+
+from django.db import migrations
+import django.db.models.deletion
+import mptt.fields
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('part', '0021_auto_20190908_0916'),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name='partcategory',
+            name='parent',
+            field=mptt.fields.TreeForeignKey(blank=True, null=True, on_delete=django.db.models.deletion.DO_NOTHING, related_name='children', to='part.PartCategory'),
+        ),
+    ]

InvenTree/part/models.py

@@ -25,6 +25,8 @@ from django.contrib.auth.models import User
 from django.db.models.signals import pre_delete
 from django.dispatch import receiver
 
+from mptt.models import TreeForeignKey
+
 from datetime import datetime
 from fuzzywuzzy import fuzz
 import hashlib
@@ -48,7 +50,7 @@ class PartCategory(InvenTreeTree):
         default_keywords: Default keywords for parts created in this category
     """
 
-    default_location = models.ForeignKey(
+    default_location = TreeForeignKey(
         'stock.StockLocation', related_name="default_categories",
         null=True, blank=True,
         on_delete=models.SET_NULL,
@@ -64,21 +66,31 @@ class PartCategory(InvenTreeTree):
         verbose_name = "Part Category"
         verbose_name_plural = "Part Categories"
 
+    def get_parts(self, cascade=True):
+        """ Return a queryset for all parts under this category.
+
+        args:
+            cascade - If True, also look under subcategories (default = True)
+        """
+
+        if cascade:
+            """ Select any parts which exist in this category or any child categories """
+            query = Part.objects.filter(category__in=self.getUniqueChildren(include_self=True))
+        else:
+            query = Part.objects.filter(category=self.pk)
+
+        return query
+
     @property
     def item_count(self):
         return self.partcount()
 
-    def partcount(self, cascade=True, active=True):
+    def partcount(self, cascade=True, active=False):
         """ Return the total part count under this category
         (including children of child categories)
         """
 
-        cats = [self.id]
-
-        if cascade:
-            cats += [cat for cat in self.getUniqueChildren()]
-
-        query = Part.objects.filter(category__in=cats)
+        query = self.get_parts(cascade=cascade)
 
         if active:
             query = query.filter(active=True)
@@ -88,7 +100,7 @@ class PartCategory(InvenTreeTree):
     @property
     def has_parts(self):
         """ True if there are any parts in this category """
-        return self.parts.count() > 0
+        return self.partcount() > 0
 
 
 @receiver(pre_delete, sender=PartCategory, dispatch_uid='partcategory_delete_log')
@@ -253,17 +265,9 @@ class Part(models.Model):
 
     def set_category(self, category):
 
-        if not type(category) == PartCategory:
-            raise ValidationError({
-                'category': _('Invalid object supplied to part.set_category')
-            })
-
-        try:
-            # Already in this category!
-            if category == self.category:
-                return
-        except PartCategory.DoesNotExist:
-            pass
+        # Ignore if the category is already the same
+        if self.category == category:
+            return
 
         self.category = category
         self.save()
@@ -340,10 +344,10 @@ class Part(models.Model):
 
     keywords = models.CharField(max_length=250, blank=True, help_text='Part keywords to improve visibility in search results')
 
-    category = models.ForeignKey(PartCategory, related_name='parts',
-                                 null=True, blank=True,
-                                 on_delete=models.DO_NOTHING,
-                                 help_text='Part category')
+    category = TreeForeignKey(PartCategory, related_name='parts',
+                              null=True, blank=True,
+                              on_delete=models.DO_NOTHING,
+                              help_text='Part category')
 
     IPN = models.CharField(max_length=100, blank=True, help_text='Internal Part Number')
 
@@ -353,10 +357,10 @@ class Part(models.Model):
 
     image = models.ImageField(upload_to=rename_part_image, max_length=255, null=True, blank=True)
 
-    default_location = models.ForeignKey('stock.StockLocation', on_delete=models.SET_NULL,
-                                         blank=True, null=True,
-                                         help_text='Where is this item normally stored?',
-                                         related_name='default_parts')
+    default_location = TreeForeignKey('stock.StockLocation', on_delete=models.SET_NULL,
+                                      blank=True, null=True,
+                                      help_text='Where is this item normally stored?',
+                                      related_name='default_parts')
 
     def get_default_location(self):
         """ Get the default location for a Part (may be None).
@@ -370,13 +374,11 @@ class Part(models.Model):
             return self.default_location
         elif self.category:
             # Traverse up the category tree until we find a default location
-            cat = self.category
+            cats = self.category.get_ancestors(ascending=True, include_self=True)
 
-            while cat:
+            for cat in cats:
                 if cat.default_location:
                     return cat.default_location
-                else:
-                    cat = cat.parent
 
         # Default case - no default category found
         return None
@@ -1055,7 +1057,7 @@ class PartParameterTemplate(models.Model):
         super().validate_unique(exclude)
 
         try:
-            others = PartParameterTemplate.objects.exclude(id=self.id).filter(name__iexact=self.name)
+            others = PartParameterTemplate.objects.filter(name__iexact=self.name).exclude(pk=self.pk)
 
             if others.exists():
                 msg = _("Parameter template name must be unique")
@@ -1063,11 +1065,6 @@ class PartParameterTemplate(models.Model):
         except PartParameterTemplate.DoesNotExist:
             pass
 
-    @property
-    def instance_count(self):
-        """ Return the number of instances of this Parameter Template """
-        return self.instances.count()
-
     name = models.CharField(max_length=100, help_text='Parameter Name', unique=True)
 
     units = models.CharField(max_length=25, help_text='Parameter Units', blank=True)
@@ -1086,7 +1083,7 @@ class PartParameter(models.Model):
     def __str__(self):
         # String representation of a PartParameter (used in the admin interface)
         return "{part} : {param} = {data}{units}".format(
-            part=str(self.part),
+            part=str(self.part.full_name),
             param=str(self.template.name),
             data=str(self.data),
             units=str(self.template.units)
@@ -1096,8 +1093,7 @@ class PartParameter(models.Model):
         # Prevent multiple instances of a parameter for a single part
         unique_together = ('part', 'template')
 
-    part = models.ForeignKey(Part, on_delete=models.CASCADE,
-                             related_name='parameters', help_text='Parent Part')
+    part = models.ForeignKey(Part, on_delete=models.CASCADE, related_name='parameters', help_text='Parent Part')
 
     template = models.ForeignKey(PartParameterTemplate, on_delete=models.CASCADE, related_name='instances', help_text='Parameter Template')
 

InvenTree/part/test_bom_item.py

@@ -19,7 +19,7 @@ class BomItemTest(TestCase):
 
     def test_str(self):
         b = BomItem.objects.get(id=1)
-        self.assertEqual(str(b), '10 x M2x4 LPHS to make Bob')
+        self.assertEqual(str(b), '10 x M2x4 LPHS to make BOB | Bob | A2')
 
     def test_has_bom(self):
         self.assertFalse(self.orphan.has_bom)

InvenTree/part/test_category.py

@@ -48,7 +48,7 @@ class CategoryTest(TestCase):
     def test_unique_childs(self):
         """ Test the 'unique_children' functionality """
 
-        childs = self.electronics.getUniqueChildren()
+        childs = [item.pk for item in self.electronics.getUniqueChildren()]
 
         self.assertIn(self.transceivers.id, childs)
         self.assertIn(self.ic.id, childs)
@@ -58,7 +58,7 @@ class CategoryTest(TestCase):
     def test_unique_parents(self):
         """ Test the 'unique_parents' functionality """
         
-        parents = self.transceivers.getUniqueParents()
+        parents = [item.pk for item in self.transceivers.getUniqueParents()]
 
         self.assertIn(self.electronics.id, parents)
         self.assertIn(self.ic.id, parents)
@@ -87,6 +87,12 @@ class CategoryTest(TestCase):
 
         self.assertEqual(self.electronics.partcount(), 3)
 
+        self.assertEqual(self.mechanical.partcount(), 4)
+        self.assertEqual(self.mechanical.partcount(active=True), 3)
+        self.assertEqual(self.mechanical.partcount(False), 2)
+
+        self.assertEqual(self.electronics.item_count, self.electronics.partcount())
+
     def test_delete(self):
         """ Test that category deletion moves the children properly """
 

InvenTree/part/test_param.py

@@ -0,0 +1,42 @@
+# Tests for Part Parameters
+
+# -*- coding: utf-8 -*-
+from __future__ import unicode_literals
+
+from django.test import TestCase
+import django.core.exceptions as django_exceptions
+
+from .models import PartParameter, PartParameterTemplate
+
+
+class TestParams(TestCase):
+
+    fixtures = [
+        'location',
+        'category',
+        'part',
+        'params'
+    ]
+
+    def test_str(self):
+
+        t1 = PartParameterTemplate.objects.get(pk=1)
+        self.assertEquals(str(t1), 'Length (mm)')
+
+        p1 = PartParameter.objects.get(pk=1)
+        self.assertEqual(str(p1), "M2x4 LPHS : Length = 4mm")
+
+    def test_validate(self):
+        
+        n = PartParameterTemplate.objects.all().count()
+
+        t1 = PartParameterTemplate(name='abcde', units='dd')
+        t1.save()
+
+        self.assertEqual(n + 1, PartParameterTemplate.objects.all().count())
+
+        # Test that the case-insensitive name throws a ValidationError
+        with self.assertRaises(django_exceptions.ValidationError):
+            t3 = PartParameterTemplate(name='aBcde', units='dd')
+            t3.full_clean()
+            t3.save()

InvenTree/part/test_part.py

@@ -1,9 +1,14 @@
+# Tests for the Part model
+
+# -*- coding: utf-8 -*-
+from __future__ import unicode_literals
+
 from django.test import TestCase
 
 import os
 
 from .models import Part
-from .models import rename_part_image
+from .models import rename_part_image, match_part_names
 from .templatetags import inventree_extras
 
 
@@ -39,6 +44,10 @@ class PartTest(TestCase):
 
         self.C1 = Part.objects.get(name='C_22N_0805')
 
+    def test_str(self):
+        p = Part.objects.get(pk=100)
+        self.assertEqual(str(p), "BOB | Bob | A2 - Can we build it?")
+
     def test_metadata(self):
         self.assertEqual(self.R1.name, 'R_2K2_0805')
         self.assertEqual(self.R1.get_absolute_url(), '/part/3/')
@@ -70,5 +79,10 @@ class PartTest(TestCase):
         self.assertIn(self.R1.name, barcode)
 
     def test_copy(self):
-
         self.R2.deepCopy(self.R1, image=True, bom=True)
+
+    def test_match_names(self):
+
+        matches = match_part_names('M2x5 LPHS')
+
+        self.assertTrue(len(matches) > 0)

InvenTree/stock/fixtures/location.yaml

@@ -5,6 +5,10 @@
   fields:
     name: 'Home'
     description: 'My house'
+    level: 0
+    tree_id: 1
+    lft: 1
+    rght: 6
 
 - model: stock.stocklocation
   pk: 2
@@ -12,6 +16,10 @@
     name: 'Bathroom'
     description: 'Where I keep my bath'
     parent: 1
+    level: 1
+    tree_id: 1
+    lft: 2
+    rght: 3
 
 - model: stock.stocklocation
   pk: 3
@@ -19,12 +27,20 @@
     name: 'Dining Room'
     description: 'A table lives here'
     parent: 1
+    level: 0
+    tree_id: 1
+    lft: 4
+    rght: 5
 
 - model: stock.stocklocation
   pk: 4
   fields:
     name: 'Office'
     description: 'Place of work'
+    level: 0
+    tree_id: 2
+    lft: 1
+    rght: 8
 
 - model: stock.stocklocation
   pk: 5
@@ -32,6 +48,10 @@
     name: 'Drawer_1'
     description: 'In my desk'
     parent: 4
+    level: 0
+    tree_id: 2
+    lft: 2
+    rght: 3
 
 - model: stock.stocklocation
   pk: 6
@@ -39,6 +59,10 @@
     name: 'Drawer_2'
     description: 'Also in my desk'
     parent: 4
+    level: 0
+    tree_id: 2
+    lft: 4
+    rght: 5
     
 - model: stock.stocklocation
   pk: 7
@@ -46,3 +70,7 @@
     name: 'Drawer_3'
     description: 'Again, in my desk'
     parent: 4
+    level: 0
+    tree_id: 2
+    lft: 6
+    rght: 7

InvenTree/stock/migrations/0011_auto_20190908_0404.py

@@ -0,0 +1,37 @@
+# Generated by Django 2.2.5 on 2019-09-08 04:04
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('stock', '0010_stockitem_build'),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name='stocklocation',
+            name='level',
+            field=models.PositiveIntegerField(default=0, editable=False),
+            preserve_default=False,
+        ),
+        migrations.AddField(
+            model_name='stocklocation',
+            name='lft',
+            field=models.PositiveIntegerField(default=0, editable=False),
+            preserve_default=False,
+        ),
+        migrations.AddField(
+            model_name='stocklocation',
+            name='rght',
+            field=models.PositiveIntegerField(default=0, editable=False),
+            preserve_default=False,
+        ),
+        migrations.AddField(
+            model_name='stocklocation',
+            name='tree_id',
+            field=models.PositiveIntegerField(db_index=True, default=0, editable=False),
+            preserve_default=False,
+        ),
+    ]

InvenTree/stock/migrations/0012_auto_20190908_0405.py

@@ -0,0 +1,22 @@
+# Generated by Django 2.2.5 on 2019-09-08 04:05
+
+from django.db import migrations
+
+from stock import models
+
+
+def update_tree(apps, schema_editor):
+    # Update the StockLocation MPTT model
+
+    models.StockLocation.objects.rebuild()
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('stock', '0011_auto_20190908_0404'),
+    ]
+
+    operations = [
+        migrations.RunPython(update_tree)
+    ]

InvenTree/stock/migrations/0013_auto_20190908_0916.py

@@ -0,0 +1,20 @@
+# Generated by Django 2.2.5 on 2019-09-08 09:16
+
+from django.db import migrations
+import django.db.models.deletion
+import mptt.fields
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('stock', '0012_auto_20190908_0405'),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name='stockitem',
+            name='location',
+            field=mptt.fields.TreeForeignKey(blank=True, help_text='Where is this stock item located?', null=True, on_delete=django.db.models.deletion.DO_NOTHING, related_name='stock_items', to='stock.StockLocation'),
+        ),
+    ]

InvenTree/stock/migrations/0014_auto_20190908_0918.py

@@ -0,0 +1,20 @@
+# Generated by Django 2.2.5 on 2019-09-08 09:18
+
+from django.db import migrations
+import django.db.models.deletion
+import mptt.fields
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('stock', '0013_auto_20190908_0916'),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name='stocklocation',
+            name='parent',
+            field=mptt.fields.TreeForeignKey(blank=True, null=True, on_delete=django.db.models.deletion.DO_NOTHING, related_name='children', to='stock.StockLocation'),
+        ),
+    ]

InvenTree/stock/models.py

@@ -16,6 +16,8 @@ from django.contrib.auth.models import User
 from django.db.models.signals import pre_delete
 from django.dispatch import receiver
 
+from mptt.models import TreeForeignKey
+
 from datetime import datetime
 from InvenTree import helpers
 
@@ -34,9 +36,6 @@ class StockLocation(InvenTreeTree):
     def get_absolute_url(self):
         return reverse('stock-location-detail', kwargs={'pk': self.id})
 
-    def has_items(self):
-        return self.stock_items.count() > 0
-
     def format_barcode(self):
         """ Return a JSON string for formatting a barcode for this StockLocation object """
 
@@ -49,16 +48,33 @@ class StockLocation(InvenTreeTree):
             }
         )
 
+    def get_stock_items(self, cascade=True):
+        """ Return a queryset for all stock items under this category.
+
+        Args:
+            cascade: If True, also look under sublocations (default = True)
+        """
+
+        if cascade:
+            query = StockItem.objects.filter(location__in=self.getUniqueChildren(include_self=True))
+        else:
+            query = StockItem.objects.filter(location=self.pk)
+
+        return query
+
     def stock_item_count(self, cascade=True):
         """ Return the number of StockItem objects which live in or under this category
         """
 
-        if cascade:
-            query = StockItem.objects.filter(location__in=self.getUniqueChildren())
-        else:
-            query = StockItem.objects.filter(location=self)
+        return self.get_stock_items(cascade).count()
 
-        return query.count()
+    def has_items(self, cascade=True):
+        """ Return True if there are StockItems existing in this category.
+
+        Args:
+            cascade: If True, also search an sublocations (default = True)
+        """
+        return self.stock_item_count(cascade) > 0
 
     @property
     def item_count(self):
@@ -277,9 +293,9 @@ class StockItem(models.Model):
     supplier_part = models.ForeignKey('company.SupplierPart', blank=True, null=True, on_delete=models.SET_NULL,
                                       help_text='Select a matching supplier part for this stock item')
 
-    location = models.ForeignKey(StockLocation, on_delete=models.DO_NOTHING,
-                                 related_name='stock_items', blank=True, null=True,
-                                 help_text='Where is this stock item located?')
+    location = TreeForeignKey(StockLocation, on_delete=models.DO_NOTHING,
+                              related_name='stock_items', blank=True, null=True,
+                              help_text='Where is this stock item located?')
 
     belongs_to = models.ForeignKey('self', on_delete=models.DO_NOTHING,
                                    related_name='owned_parts', blank=True, null=True,

InvenTree/stock/templates/stock/location_list.html

@@ -7,8 +7,8 @@ Sub-Locations<span class='badge'>{{ children|length }}</span>
 {% block collapse_content %}
 <ul class="list-group">
 {% for child in children %}
-<li class="list-group-item"><a href="{% url 'stock-location-detail' child.id %}">{{ child.name }}</a> - <i>{{ child.description }}</i></li>
-    <span class='badge'>{{ child.partcount }}</span>
+<li class="list-group-item"><a href="{% url 'stock-location-detail' child.id %}">{{ child.name }}</a> - <i>{{ child.description }}</i>
+    <span class='badge'>{{ child.item_count }}</span>
 </li>
 {% endfor %}
 </ul>

InvenTree/stock/tests.py

@@ -67,15 +67,18 @@ class StockTest(TestCase):
 
         # Move one of the drawers
         self.drawer3.parent = self.home
+        self.drawer3.save()
+
         self.assertNotEqual(self.drawer3.parent, self.office)
         
         self.assertEqual(self.drawer3.pathstring, 'Home/Drawer_3')
 
     def test_children(self):
         self.assertTrue(self.office.has_children)
+
         self.assertFalse(self.drawer2.has_children)
 
-        childs = self.office.getUniqueChildren()
+        childs = [item.pk for item in self.office.getUniqueChildren()]
 
         self.assertIn(self.drawer1.id, childs)
         self.assertIn(self.drawer2.id, childs)

InvenTree/templates/about.html

@@ -17,10 +17,10 @@
                     <h4>InvenTree Version Information</h4>
                     <table class='table table-striped table-condensed'>
                         <tr>
-                            <td>Version</td><td>{% inventree_version %}</td>
+                            <td>Version</td><td><a href="https://github.com/inventree/InvenTree/releases">{% inventree_version %}</a></td>
                         </tr>
                         <tr>
-                            <td>Commit Hash</td><td>{% inventree_commit %}</td>
+                            <td>Commit Hash</td><td><a href="https://github.com/inventree/InvenTree/commit/{% inventree_commit %}">{% inventree_commit %}</a></td>
                         </tr>
                         <tr>
                             <td colspan="2"></td>

Makefile

@@ -7,6 +7,8 @@ clean:
 	rm -rf .tox
 	rm -f .coverage
 
+update: backup migrate
+
 # Perform database migrations (after schema changes are made)
 migrate:
 	python3 InvenTree/manage.py makemigrations common
@@ -64,4 +66,4 @@ backup:
 	python3 InvenTree/manage.py dbbackup
 	python3 InvenTree/manage.py mediabackup
 
-.PHONY: clean migrate superuser install mysql style test coverage docreqs docs backup
+.PHONY: clean migrate superuser install mysql style test coverage docreqs docs backup update

docs/update.rst

@@ -29,7 +29,13 @@ Perform Migrations
 
 Updating the database is as simple as calling the makefile target:
 
-``make migrate``
+``make update``
+
+This command performs the following steps:
+
+* Backup database entries and uploaded media files
+* Perform required database schema changes
+* Collect required static files
 
 Restart Server
 --------------

requirements.txt

@@ -3,6 +3,7 @@ pillow>=5.0.0                   # Image manipulation
 djangorestframework>=3.6.2      # DRF framework
 django-cors-headers>=2.5.3      # CORS headers extension for DRF
 django_filter>=1.0.2            # Extended filtering options
+django-mptt>=0.10.0             # Modified Preorder Tree Traversal
 django-dbbackup==3.2.0          # Database backup / restore functionality
 coreapi>=2.3.0                  # API documentation
 pygments>=2.2.0                 # Syntax highlighting