Add function to duplicate stock item

InvenTree/part/templates/part/part_base.html

@@ -102,7 +102,7 @@
             {
                 follow: true,
                 data: {
-                    copy_part: {{ part.id }},
+                    copy: {{ part.id }},
                 },
             }
         );

InvenTree/part/views.py

@@ -78,7 +78,7 @@ class PartCreate(AjaxCreateView):
     def get_initial(self):
 
         # Is the client attempting to copy an existing part?
-        part_to_copy = self.request.GET.get('copy_part', None)
+        part_to_copy = self.request.GET.get('copy', None)
 
         if part_to_copy:
             try:

InvenTree/stock/templates/stock/item.html

@@ -13,6 +13,7 @@
     <h3>
     <div style='float: right;'>
     <div class="dropdown" style="float: right;">
+        <button class='btn btn-primary' type='button' id='duplicate-item'>Copy Stock Item</button>
         <button class="btn btn-primary dropdown-toggle" type="button" data-toggle="dropdown">Options
         <span class="caret"></span></button>
         <ul class="dropdown-menu">
@@ -140,6 +141,19 @@
 {% endblock %}
 {% block js_ready %}
 {{ block.super }}
+
+    $("#duplicate-item").click(function() {
+        launchModalForm(
+            "{% url 'stock-item-create' %}",
+            {
+                follow: true,
+                data: {
+                    copy: {{ item.id }},
+                },
+            }
+        );
+    });
+
     $("#stock-edit").click(function () {
         launchModalForm(
                         "{% url 'stock-item-edit' item.id %}",

InvenTree/stock/views.py

@@ -4,6 +4,7 @@ from __future__ import unicode_literals
 from django.shortcuts import get_object_or_404
 
 from django.views.generic import DetailView, ListView
+from django.forms.models import model_to_dict
 
 from InvenTree.views import AjaxUpdateView, AjaxDeleteView, AjaxCreateView
 
@@ -126,7 +127,20 @@ class StockItemCreate(AjaxCreateView):
     ajax_form_title = 'Create new Stock Item'
 
     def get_initial(self):
-        initials = super(StockItemCreate, self).get_initial().copy()
+
+        # Is the client attempting to copy an existing stock item?
+        item_to_copy = self.request.GET.get('copy', None)
+
+        if item_to_copy:
+            try:
+                original = StockItem.objects.get(pk=item_to_copy)
+                initials = model_to_dict(original)
+                self.ajax_form_title = "Copy Stock Item"
+            except StockItem.DoesNotExist:
+                initials = super(StockItemCreate, self).get_initial().copy()
+
+        else:
+            initials = super(StockItemCreate, self).get_initial().copy()
 
         part_id = self.request.GET.get('part', None)
         loc_id = self.request.GET.get('location', None)