Form / view / etc for performing StockItem conversion

InvenTree/stock/forms.py

@@ -63,6 +63,18 @@ class EditStockLocationForm(HelperForm):
         ]
 
 
+class ConvertStockItemForm(HelperForm):
+    """
+    Form for converting a StockItem to a variant of its current part.
+    """
+
+    class Meta:
+        model = StockItem
+        fields = [
+            'part'
+        ]
+
+
 class CreateStockItemForm(HelperForm):
     """ Form for creating a new StockItem """
 

InvenTree/stock/templates/stock/item_base.html

@@ -93,6 +93,11 @@ InvenTree | {% trans "Stock Item" %} - {{ item }}
         <span class='fas fa-copy'/>
     </button>
     {% endif %}
+    {% if item.part.has_variants %}
+    <button type='button' class='btn btn-default' id='stock-convert' title="Convert stock to variant">
+        <span class='fas fa-screwdriver'/>
+    </button>
+    {% endif %}
     {% if item.part.has_test_report_templates %}
     <button type='button' class='btn btn-default' id='stock-test-report' title='Generate test report'>
         <span class='fas fa-tasks'/>
@@ -324,6 +329,16 @@ function itemAdjust(action) {
     );
 }
 
+{% if item.part.has_variants %}
+$("#stock-convert").click(function() {
+    launchModalForm("{% url 'stock-item-convert' item.id %}",
+        {
+            reload: true,
+        }
+    );
+});
+{% endif %}
+
 $("#stock-move").click(function() {
     itemAdjust("move");
 });

InvenTree/stock/templates/stock/stockitem_convert.html

@@ -0,0 +1,17 @@
+{% extends "modal_form.html" %}
+{% load i18n %}
+
+{% block pre_form_content %}
+
+<div class='alert alert-block alert-info'>
+    <b>{% trans "Convert Stock Item" %}</b><br>
+    {% trans "This stock item is current an instance of " %}<i>{{ item.part }}</i><br>
+    {% trans "It can be converted to one of the part variants listed below." %}
+</div>
+
+<div class='alert alert-block alert-warning'>
+    <b>{% trans "Warning" %}</b>
+    {% trans "This action cannot be easily undone" %}
+</div>
+
+{% endblock %}

InvenTree/stock/urls.py

@@ -18,6 +18,7 @@ stock_location_detail_urls = [
 
 stock_item_detail_urls = [
     url(r'^edit/', views.StockItemEdit.as_view(), name='stock-item-edit'),
+    url(r'^convert/', views.StockItemEdit.as_view(), name='stock-item-convert'),
     url(r'^serialize/', views.StockItemSerialize.as_view(), name='stock-item-serialize'),
     url(r'^delete/', views.StockItemDelete.as_view(), name='stock-item-delete'),
     url(r'^qr_code/', views.StockItemQRCode.as_view(), name='stock-item-qr'),

InvenTree/stock/views.py

@@ -887,6 +887,30 @@ class StockItemEdit(AjaxUpdateView):
         return form
 
 
+class StockItemEdit(AjaxUpdateView):
+    """
+    View for 'converting' a StockItem to a variant of its current part.
+    """
+
+    model = StockItem
+    form_class = StockForms.ConvertStockItemForm
+    ajax_form_title = _('Convert Stock Item')
+    ajax_template_name = 'stock/stockitem_convert.html'
+    context_object_name = 'item'
+
+    def get_form(self):
+        """
+        Filter the available parts.
+        """
+
+        form = super().get_form()
+        item = self.get_object()
+
+        form.fields['part'].queryset = item.part.get_all_variants()
+
+        return form
+
+
 class StockLocationCreate(AjaxCreateView):
     """
     View for creating a new StockLocation