Add ability to make variant from template

InvenTree/part/templates/part/variant_part.html

@@ -0,0 +1,12 @@
+{% extends "modal_form.html" %}
+
+{% block pre_form_content %}
+
+{{ block.super }}
+
+<div class='alert alert-info alert-block'>
+    <b>Create new part variant</b><br>
+    Create a new variant of template <i>'{{ part.full_name }}'</i>.
+</div>
+
+{% endblock %}

InvenTree/part/templates/part/variants.html

@@ -60,4 +60,13 @@
         sortable: true,
     });
 
+    $('#new-variant').click(function() {
+        launchModalForm(
+            "{% url 'make-part-variant' part.id %}",
+            {
+                follow: true,
+            }
+        );
+    });
+
 {% endblock %}

InvenTree/part/urls.py

@@ -24,6 +24,7 @@ part_detail_urls = [
     url(r'^bom-export/?', views.BomDownload.as_view(), name='bom-export'),
     url(r'^validate-bom/', views.BomValidate.as_view(), name='bom-validate'),
     url(r'^duplicate/', views.PartDuplicate.as_view(), name='part-duplicate'),
+    url(r'^make-variant/', views.MakePartVariant.as_view(), name='make-part-variant'),
     url(r'^pricing/', views.PartPricing.as_view(), name='part-pricing'),
     
     url(r'^variants/?', views.PartDetail.as_view(template_name='part/variants.html'), name='part-variants'),

InvenTree/part/views.py

@@ -124,6 +124,77 @@ class PartAttachmentDelete(AjaxDeleteView):
         }
 
 
+class MakePartVariant(AjaxCreateView):
+    """ View for creating a new variant based on an existing template Part 
+
+    - Part <pk> is provided in the URL '/part/<pk>/make_variant/'
+    - Automatically copy relevent data (BOM, etc, etc)
+
+    """
+
+    model = Part
+    form_class = part_forms.EditPartForm
+
+    ajax_form_title = 'Create Variant'
+    ajax_template_name = 'part/variant_part.html'
+
+    def get_part_template(self):
+        return get_object_or_404(Part, id=self.kwargs['pk'])
+
+    def get_context_data(self):
+        return {
+            'part': self.get_part_template(),
+        }
+
+    def get_form(self):
+        form = super(AjaxCreateView, self).get_form()
+
+        # Hide some variant-related fields
+        form.fields['is_template'].widget = HiddenInput()
+        form.fields['variant_of'].widget = HiddenInput()
+
+        return form
+
+    def post(self, request, *args, **kwargs):
+
+        form = self.get_form()
+        context = self.get_context_data()
+        part_template = self.get_part_template()
+
+        valid = form.is_valid()
+
+        data = {
+            'form_valid': valid,
+        }
+
+        if valid:
+            # Create the new part variant
+            part = form.save(commit=False)
+            part.variant_of = part_template
+            part.is_template = False
+
+            part.save()
+
+            data['pk'] = part.pk
+            data['text'] = str(part)
+            data['url'] = part.get_absolute_url()
+
+            # Copy relevent information from the template part
+            part.deepCopy(part_template, bom=True)
+
+        return self.renderJsonResponse(request, form, data, context=context)
+
+    def get_initial(self):
+
+        part_template = self.get_part_template()
+
+        initials = model_to_dict(part_template)
+        initials['is_template'] = False
+        initials['variant_of'] = part_template
+
+        return initials
+
+
 class PartDuplicate(AjaxCreateView):
     """ View for duplicating an existing Part object.