From 2fa284d37bcb97aca87162807e0abe6e6b369cc3 Mon Sep 17 00:00:00 2001
From: eeintech <eeintech@eeinte.ch>
Date: Fri, 4 Sep 2020 17:20:17 -0500
Subject: [PATCH] Added PartDetailFromIPN view (subclass of PartDetail) and url
 pattern

---
 InvenTree/part/urls.py  |  4 +++-
 InvenTree/part/views.py | 35 +++++++++++++++++++++++++++++++++++
 2 files changed, 38 insertions(+), 1 deletion(-)

diff --git a/InvenTree/part/urls.py b/InvenTree/part/urls.py
index 7d5c279e75..037c792480 100644
--- a/InvenTree/part/urls.py
+++ b/InvenTree/part/urls.py
@@ -99,8 +99,10 @@ part_urls = [
     # Export data for multiple parts
     url(r'^export/', views.PartExport.as_view(), name='part-export'),
 
-    # Individual part
+    # Individual part using pk
     url(r'^(?P<pk>\d+)/', include(part_detail_urls)),
+    # Individual part using IPN as slug
+    url(r'^(?P<slug>[-\w]+)/', views.PartDetailFromIPN.as_view(), name='part-detail-from-ipn'),
 
     # Part category
     url(r'^category/(?P<pk>\d+)/', include(part_category_urls)),
diff --git a/InvenTree/part/views.py b/InvenTree/part/views.py
index f2d0089e60..ed6367eba4 100644
--- a/InvenTree/part/views.py
+++ b/InvenTree/part/views.py
@@ -647,6 +647,41 @@ class PartDetail(DetailView):
         return context
 
 
+class PartDetailFromIPN(PartDetail):
+    slug_field = 'IPN'
+    slug_url_kwarg = 'slug'
+
+    def get_object(self):
+        """ Return Part object which IPN field matches the slug value """
+        queryset = self.get_queryset()
+        # Get slug
+        slug = self.kwargs.get(self.slug_url_kwarg)
+
+        if slug is not None:
+            slug_field = self.get_slug_field()
+            # Filter by the slug value
+            queryset = queryset.filter(**{slug_field: slug})
+
+            try:
+                # Get unique part from queryset
+                part = queryset.get()
+                # Return Part object
+                return part
+            except queryset.model.DoesNotExist:
+                pass
+        
+        return None
+
+    def get(self, request, *args, **kwargs):
+        """ Attempt to match slug to a Part, else redirect to PartIndex view """
+        self.object = self.get_object()
+
+        if not self.object:
+            return HttpResponseRedirect(reverse('part-index'))
+
+        return super(PartDetailFromIPN, self).get(request, *args, **kwargs)
+
+
 class PartQRCode(QRCodeView):
     """ View for displaying a QR code for a Part object """