Add navigation bar and fix the bug of "too many values to unbound"

templates/category.html

@@ -1,6 +1,7 @@
 {% extends "templates/base.html" %}
 
 {% block content %}
+<a href="/blog/{{ blog.id }}?page=0">Home</a> <a href="/category/{{ blog.id }}">Categories</a> <a href="/tag/{{ blog.id }}">Tags</a><br/><br/>
 {% if categories|length == 0 %}
 <b>Any category available</b><br/><br/>
 {% else %}

templates/generate.html

@@ -31,4 +31,8 @@
 {% endfor %}
 {% endif %}
 </table>
+<br/><br/>
+{% autoescape off %}
+<center>{{ navigation_bar }}</center>
+{% endautoescape %}
 {% endblock %}

templates/tag.html

@@ -1,6 +1,7 @@
 {% extends "templates/base.html" %}
 
 {% block content %}
+<a href="/blog/{{ blog.id }}?page=0">Home</a> <a href="/category/{{ blog.id }}">Categories</a> <a href="/tag/{{ blog.id }}">Tags</a><br/><br/>
 {% if tags|length == 0 %}
 <b>Any tag available</b><br/><br/>
 {% else %}

templates/view_blog.html

@@ -1,7 +1,7 @@
 {% extends "templates/base.html" %}
 
 {% block content %}
-<a href="/blog/{{ blog.id }}">Home</a> <a href="/category/{{ blog.id }}">Categories</a> <a href="/tag/{{ blog.id }}">Tags</a>
+<a href="/blog/{{ blog.id }}?page=0">Home</a> <a href="/category/{{ blog.id }}">Categories</a> <a href="/tag/{{ blog.id }}">Tags</a>
 {% if user.is_superuser %}
 <form action="/blog/edit/{{ blog.id }}" method="post">
 {% csrf_token %}
@@ -24,4 +24,8 @@
 {% endfor %}
 {% endif %}
 </table>
+<br/><br/>
+{% autoescape off %}
+<center>{{ navigation_bar }}</center>
+{% endautoescape %}
 {% endblock %}