Add Exception handling of SNA Interactive

Author: devbruce

app/templates/index.html

@@ -60,7 +60,7 @@ <h2 class="text-center">Text Data Visualizer</h2>
             <button class="btn btn-lg btn-primary dropdown-toggle mt-3 mb-3" type="button" data-toggle="collapse" data-target="#mode-default" aria-expanded="false" aria-controls="mode-default">Data Input Mode : Default</button>
             <div class="collapse" id="mode-default">
                 <div class="card card-body bg-light mb-3">
-                    <a class="btn btn-lg btn-outline-dark mb-3" href="{% url 'viz:sna_interactive' %}"><h5 class="set-inline">Semantic Network Analysis</h5> <span class="badge badge-pill badge-danger">Interactive</span></a>
+                    <a class="btn btn-lg btn-outline-dark mb-3" href="{% url 'viz:sna-interactive' %}"><h5 class="set-inline">Semantic Network Analysis</h5> <span class="badge badge-pill badge-danger">Interactive</span></a>
                     <a class="btn btn-lg btn-outline-dark" href="{% url 'viz:wc' %}"><h5 class="set-inline">Word Cloud</h5> <span class="badge badge-pill badge-warning">Simple Image</span></a>
                 </div>
             </div>
@@ -70,8 +70,8 @@ <h2 class="text-center">Text Data Visualizer</h2>
             <button class="btn btn-lg btn-primary dropdown-toggle mt-3 mb-3" type="button" data-toggle="collapse" data-target="#mode-file" aria-expanded="false" aria-controls="mode-file">Data Input Mode : File</button>
             <div class="collapse" id="mode-file">
                 <div class="card card-body bg-light mb-3">
-                    <a class="btn btn-lg btn-outline-dark mb-3" href="{% url 'viz:sna_interactive_file' %}"><h5 class="set-inline">Semantic Network Analysis</h5> <span class="badge badge-pill badge-danger">Interactive</span></a>
-                    <a class="btn btn-lg btn-outline-dark" href="{% url 'viz:wc_file' %}"><h5 class="set-inline">Word Cloud</h5> <span class="badge badge-pill badge-warning">Simple Image</span></a>
+                    <a class="btn btn-lg btn-outline-dark mb-3" href="{% url 'viz:sna-interactive-file' %}"><h5 class="set-inline">Semantic Network Analysis</h5> <span class="badge badge-pill badge-danger">Interactive</span></a>
+                    <a class="btn btn-lg btn-outline-dark" href="{% url 'viz:wc-file' %}"><h5 class="set-inline">Word Cloud</h5> <span class="badge badge-pill badge-warning">Simple Image</span></a>
                 </div>
             </div>
         </div>

app/templates/viz/show_result/sna_interactive.html

@@ -113,9 +113,9 @@ <h3 class="alert-heading">Data Error</h3>
                 <p>If you see this page, it will be in one of the following cases.</p>
                 <hr>
                 <p class="mb-2">- The amount of data entered is so small that it can not be analyzed.</p>
-                <p class="mb-2">- The value of Edge Remove Threshold is too high. Edge Remove Threshold should be a reasonable value for the amount of data.</p>
+                <p class="mb-2">- The value of Edge Remove Threshold is too high. It should be a reasonable value for the amount of data.</p>
         </div>
-        <a href="{% if mode_file %}{% url 'viz:sna_file' %}{% else %}{% url 'viz:sna' %}{% endif %}" class="btn btn-danger btn-lg btn-block">Back To Configuration</a>
+        <a href="{% if mode_file %}{% url 'viz:sna-interactive-file' %}{% else %}{% url 'viz:sna-interactive' %}{% endif %}" class="btn btn-danger btn-lg btn-block">Back To Configuration</a>
 </div>
 
 <div class="block-content"></div>

app/templates/viz/show_result/wc.html

@@ -7,7 +7,7 @@
 <div class="text-center">
     <img src="{% url 'viz:wc_result' %}" alt="WC Result Image">
 </div>
-<a href="{% if mode_file %}{% url 'viz:wc_file' %}{% else %}{% url 'viz:wc' %}{% endif %}" class="btn btn-info btn-lg btn-block border-radius-0">Back To Configuration</a>
+<a href="{% if mode_file %}{% url 'viz:wc-file' %}{% else %}{% url 'viz:wc' %}{% endif %}" class="btn btn-info btn-lg btn-block border-radius-0">Back To Configuration</a>
 
 {% else %}
 
@@ -18,7 +18,7 @@ <h3 class="alert-heading">Data Error</h3>
         <hr>
         <p class="mb-2">- The amount of data entered is so small that it can not be analyzed.</p>
     </div>
-    <a href="{% if mode_file %}{% url 'viz:wc_file' %}{% else %}{% url 'viz:wc' %}{% endif %}" class="btn btn-danger btn-lg btn-block">Back To Configuration</a>
+    <a href="{% if mode_file %}{% url 'viz:wc-file' %}{% else %}{% url 'viz:wc' %}{% endif %}" class="btn btn-danger btn-lg btn-block">Back To Configuration</a>
 </div>
 
 <div class="block-content"></div>

app/viz/core/sna_sub.py

@@ -160,6 +160,11 @@ def get_sub_data(graph, node_num, edge_remove_threshold, remove_isolated_node, m
             sub_nodes.append(node_data[0])
 
     sub_graph = graph.subgraph(sub_nodes)
+
+    # Exception Handling : If No Edges or No Nodes
+    if not sub_graph.edges or not sub_graph.nodes:
+        raise ValueError()
+
     result = {
         'sub_graph': sub_graph,
         'tf_sum_dict': tf_sum_dict,

app/viz/urls.py

@@ -4,10 +4,10 @@
 app_name = 'viz'
 
 urlpatterns = [
-    path('sna_interactive/', views.sna_interactive, name='sna_interactive'),
-    path('sna_interactive_file/', views.sna_interactive_file, name='sna_interactive_file'),
-    path('sna_gexf/', views.get_gexf, name='get_gexf'),
+    path('sna_interactive/', views.sna_interactive, name='sna-interactive'),
+    path('sna_interactive_file/', views.sna_interactive_file, name='sna-interactive-file'),
+    path('sna_gexf/', views.get_gexf, name='get-gexf'),
     path('wc/', views.wc, name='wc'),
-    path('wc_file/', views.wc_file, name='wc_file'),
-    path('wc_result/', views.wc_result, name='wc_result'),
+    path('wc_file/', views.wc_file, name='wc-file'),
+    path('wc_result/', views.wc_result, name='wc-result'),
 ]

app/viz/views.py

@@ -25,8 +25,9 @@ def sna_interactive(request):
                 'theme': theme,
                 'value_error': value_error,
                 'footer_sticky': footer_sticky,
-                'partition_data': partition_data,
             }
+            if not value_error:
+                context['partition_data'] = partition_data
             return render(request, 'viz/show_result/sna_interactive.html', context)
     else:
         form = forms.SnaInteractiveForm()
@@ -73,8 +74,9 @@ def sna_interactive_file(request):
                 'theme': theme,
                 'value_error': value_error,
                 'footer_sticky': footer_sticky,
-                'partition_data': partition_data,
             }
+            if not value_error:
+                context['partition_data'] = partition_data
             return render(request, 'viz/show_result/sna_interactive.html', context)
     else:
         form = forms.SnaInteractiveFileForm()