Move BomItem into the Part app

- Does not make sense to keep these separate
- Removed bom app entirely

InvenTree/part/admin.py

@@ -1,6 +1,7 @@
 from django.contrib import admin
 
 from .models import PartCategory, Part
+from .models import BomItem
 
 class PartAdmin(admin.ModelAdmin):
 
@@ -11,6 +12,9 @@ class PartCategoryAdmin(admin.ModelAdmin):
 
     list_display = ('name', 'pathstring', 'description')
 
+class BomItemAdmin(admin.ModelAdmin):
+    list_display=('part', 'sub_part', 'quantity')
+
 """
 class ParameterTemplateAdmin(admin.ModelAdmin):
     list_display = ('name', 'units', 'format')
@@ -22,6 +26,7 @@ class ParameterAdmin(admin.ModelAdmin):
 
 admin.site.register(Part, PartAdmin)
 admin.site.register(PartCategory, PartCategoryAdmin)
+admin.site.register(BomItem, BomItemAdmin)
 
 #admin.site.register(PartParameter, ParameterAdmin)
 #admin.site.register(PartParameterTemplate, ParameterTemplateAdmin)

InvenTree/part/api.py

@@ -1,11 +1,12 @@
 from .serializers import PartSerializer
 from .serializers import PartCategorySerializer
+from .serializers import BomItemSerializer
 
 from rest_framework import generics, permissions
 
 from django_filters.rest_framework import FilterSet, DjangoFilterBackend
 
-from .models import PartCategory, Part
+from .models import PartCategory, Part, BomItem
 
 class PartDetail(generics.RetrieveUpdateDestroyAPIView):
     """
@@ -172,3 +173,28 @@ class PartTemplateList(generics.ListCreateAPIView):
     permission_classes = (permissions.IsAuthenticatedOrReadOnly,)
 
 """
+
+class BomItemDetail(generics.RetrieveUpdateDestroyAPIView):
+
+    queryset = BomItem.objects.all()
+    serializer_class = BomItemSerializer
+    permission_classes = (permissions.IsAuthenticatedOrReadOnly,)
+
+
+class BomItemFilter(FilterSet):
+
+    class Meta:
+        model = BomItem
+        fields = ['part', 'sub_part']
+
+
+class BomItemList(generics.ListCreateAPIView):
+
+    #def get_queryset(self):
+    #    params = self.request.
+
+    queryset = BomItem.objects.all()
+    serializer_class = BomItemSerializer
+    permission_classes = (permissions.IsAuthenticatedOrReadOnly,)
+    filter_backends = (DjangoFilterBackend,)
+    filter_class = BomItemFilter

InvenTree/part/models.py

@@ -118,3 +118,32 @@ class Part(models.Model):
     """
 
 
+class BomItem(models.Model):
+    """ A BomItem links a part to its component items.
+    A part can have a BOM (bill of materials) which defines
+    which parts are required (and in what quatity) to make it
+    """
+
+    # A link to the parent part
+    # Each part will get a reverse lookup field 'bom_items'
+    part = models.ForeignKey(Part, on_delete=models.CASCADE, related_name='bom_items')
+
+    # A link to the child item (sub-part)
+    # Each part will get a reverse lookup field 'used_in'
+    sub_part = models.ForeignKey(Part, on_delete=models.CASCADE, related_name='used_in')
+
+    # Quantity required
+    quantity = models.PositiveIntegerField(default=1, validators=[MinValueValidator(0)])
+
+
+    class Meta:
+        verbose_name = "BOM Item"
+
+        # Prevent duplication of parent/child rows
+        unique_together = ('part', 'sub_part')
+
+    def __str__(self):
+        return "{par} -> {child} ({n})".format(
+            par=self.part.name,
+            child=self.sub_part.name,
+            n=self.quantity)

InvenTree/part/serializers.py

@@ -1,6 +1,16 @@
 from rest_framework import serializers
 
 from .models import Part, PartCategory
+from .models import BomItem
+
+class BomItemSerializer(serializers.ModelSerializer):
+
+    class Meta:
+        model = BomItem
+        fields = ('url',
+                  'part',
+                  'sub_part',
+                  'quantity')
 
 """
 class PartParameterSerializer(serializers.HyperlinkedModelSerializer):

InvenTree/part/urls.py

@@ -29,6 +29,15 @@ part_api_urls = [
     url(r'^$', api.PartList.as_view()),
 ]
 
+bom_api_urls = [
+    # Bom Item detail
+    url(r'^(?P<pk>[0-9]+)/?$', api.BomItemDetail.as_view(), name='bomitem-detail'),
+
+    # List of top-level categories
+    url(r'^\?*.*/?$', api.BomItemList.as_view()),
+    url(r'^$', api.BomItemList.as_view())
+]
+
 part_detail_urls = [
     url(r'^track/?', views.track, name='track'),
     url(r'^bom/?', views.bom, name='bom'),
@@ -47,6 +56,8 @@ part_urls = [
      url(r'^.*$', RedirectView.as_view(url='list', permanent=False), name='index'),
 ]
 
+
+
 """
 part_param_urls = [
     # Detail of a single part parameter