QR code improvements

- Display QR codes as links to served images
- The qr_code plugin caches these images in the background
- Make a qr_code template to push out as a modal form
- Create a QRCodeView to simplify display of QR codes
- Add option to launchModalForm() to disable the 'submit' button

Refactored QR code display for

- StockLocation
- StockItem
- Part

InvenTree/part/models.py

@@ -180,7 +180,6 @@ class Part(models.Model):
     def __str__(self):
         return "{n} - {d}".format(n=self.name, d=self.description)
 
-    @property
     def format_barcode(self):
         """ Return a JSON string for formatting a barcode for this Part object """
 

InvenTree/part/templates/part/detail.html

@@ -1,6 +1,5 @@
 {% extends "part/part_base.html" %}
 {% load static %}
-{% load qr_code %}
 {% block details  %}
 
 {% include 'part/tabs.html' with tab='detail' %}
@@ -24,6 +23,7 @@
                   {% else %}
                   <li><a href="#" id='activate-part' title='Activate part'>Activate</a></li>
                   {% endif %}
+                  <li><a href='#' id='show-qr-code' title='Generate QR Code'>Show QR Code</a></li>
                 </ul>
             </div>
         </h3>
@@ -116,8 +116,6 @@
 </div>
 {% endif %}
 
-{% qr_from_text part.format_barcode size="s" image_format="png" error_correction="L" %}
-
 {% endblock %}
 
 {% block js_load %}
@@ -128,6 +126,15 @@
 
 {% block js_ready %}
     {{ block.super }}
+
+    $("#show-qr-code").click(function() {
+        launchModalForm(
+            "{% url 'part-qr' part.id %}",
+            {
+                no_post: true,
+            }
+        );
+    });
     
     $("#duplicate-part").click(function() {
         launchModalForm(

InvenTree/part/templates/part/part_base.html

@@ -22,9 +22,7 @@
       </div>
     <div class="media-body">
         <h4>{{ part.name }}{% if part.active == False %} <i>- INACTIVE</i>{% endif %}</h4>
-        {% if part.description %}
         <p><i>{{ part.description }}</i></p>
-        {% endif %}
         {% if part.IPN %}
         <tr>
             <td>IPN</td>

InvenTree/part/urls.py

@@ -34,8 +34,9 @@ part_attachment_urls = [
 part_detail_urls = [
     url(r'^edit/?', views.PartEdit.as_view(), name='part-edit'),
     url(r'^delete/?', views.PartDelete.as_view(), name='part-delete'),
-    url(r'^track/?', views.PartDetail.as_view(template_name='part/track.html'), name='part-track'),
     url(r'^bom-export/?', views.BomDownload.as_view(), name='bom-export'),
+    
+    url(r'^track/?', views.PartDetail.as_view(template_name='part/track.html'), name='part-track'),
     url(r'^attachments/?', views.PartDetail.as_view(template_name='part/attachments.html'), name='part-attachments'),
     url(r'^bom/?', views.PartDetail.as_view(template_name='part/bom.html'), name='part-bom'),
     url(r'^build/?', views.PartDetail.as_view(template_name='part/build.html'), name='part-build'),
@@ -43,6 +44,8 @@ part_detail_urls = [
     url(r'^used/?', views.PartDetail.as_view(template_name='part/used_in.html'), name='part-used-in'),
     url(r'^allocation/?', views.PartDetail.as_view(template_name='part/allocation.html'), name='part-allocation'),
     url(r'^suppliers/?', views.PartDetail.as_view(template_name='part/supplier.html'), name='part-suppliers'),
+    
+    url(r'^qr_code/?', views.PartQRCode.as_view(), name='part-qr'),
 
     url(r'^thumbnail/?', views.PartImage.as_view(), name='part-image'),
 

InvenTree/part/views.py

@@ -27,6 +27,7 @@ from .forms import BomExportForm
 from .forms import EditSupplierPartForm
 
 from InvenTree.views import AjaxView, AjaxCreateView, AjaxUpdateView, AjaxDeleteView
+from InvenTree.views import QRCodeView
 
 from InvenTree.helpers import DownloadFile, str2bool
 
@@ -234,6 +235,21 @@ class PartDetail(DetailView):
         return context
 
 
+class PartQRCode(QRCodeView):
+    """ View for displaying a QR code for a Part object """
+
+    ajax_form_title = "Part QR Code"
+
+    def get_qr_data(self):
+        """ Generate QR code data for the Part """
+
+        try:
+            part = Part.objects.get(id=self.pk)
+            return part.format_barcode()
+        except Part.DoesNotExist:
+            return None
+
+
 class PartImage(AjaxUpdateView):
     """ View for uploading Part image """