Fix templates not to fail when footer or nav don't exist

.gitignore

@@ -31,6 +31,7 @@ venv.bak/
 
 #local db, must run migrations on production to sync
 dev.db
+data.json
 
 #credentials
 credentials.sh

apps/pep_theme/context_processors.py

@@ -1,9 +1,15 @@
 from mezzanine.pages.models import Page
 
 def footer(request):
-    footer_page = Page.objects.get(id=13)
-    return {'footer_page': footer_page}
+    if Page.objects.filter(slug='footer').exists():
+        footer_page = Page.objects.get(slug='footer')
+        return {'footer_page': footer_page}
+    else:
+        return {'footer_page': None}
 
 def navbar(request):
-    navbar_page = Page.objects.get(id=11)
-    return {'navbar_page': navbar_page}
+    if Page.objects.filter(slug='navbar').exists():
+        navbar_page = Page.objects.get(slug='navbar')
+        return {'navbar_page': navbar_page}
+    else:
+        return {'navbar_page': None}

apps/pep_theme/templates/base.html

@@ -54,9 +54,11 @@
 <div class="navbar navbar-default navbar-fixed-top" role="navigation">
 <div class="nav-logo">
 <div class="container">
+    {% if navbar_page %}
     {% editable navbar_page.get_content_model.image  %}
         <a href="/"><img src="{{ MEDIA_URL }}{{ navbar_page.get_content_model.image}}" alt=""{{navbar_page.title}}></a>
     {% endeditable %}
+    {% endif %}
 </div>
 </div>
 <div class="container">
@@ -116,6 +118,7 @@
 <footer>
 <div class="container">
 <div class="row">
+    {% if footer_page %}
     <div class="col-md-4">
         {% editable footer_page.get_content_model.text_1  %}
         {{ footer_page.get_content_model.text_1 | safe }}
@@ -131,6 +134,7 @@
         {{ footer_page.get_content_model.text_3 | safe }}
         {% endeditable %}    
     </div>
+    {% endif %}
 </div>
 </div>
 </footer>