Add redirect to page 1 from bare URL

Previously, you could browse /board/ and /board/page/1/ in the browser
and they would be the same thing. Now, /board/ redirects to
/board/page/1/ to keep things unambiguous.

Signed-off-by: Alek Ratzloff <alekratz@gmail.com>

board/templates/board/board_detail.html

@@ -66,19 +66,23 @@
 {# Page footer #}
 <div class="row pagination">
     {% if current_page > 1 %}
-    <a href="/{{board.url}}/page/{{ current_page|add:"-1" }}">{% localize on %}Prev{% endlocalize %}</a>
+        {% with prev_page=current_page|add:"-1" %}
+        <a href="{% url 'board:board_detail' board.url prev_page %}">{% localize on %}Prev{% endlocalize %}</a>
+        {% endwith %}
     {% endif %}
     [
         {% for page in pages %}
             {% if current_page == page %}
             <strong>{{page}}</strong>
             {% else %}
-            <a href="page/{{page}}">{{page}}</a>
+            <a href="{% url 'board:board_detail' board.url page %}">{{page}}</a>
             {% endif %}
         {% endfor %}
     ]
     {% if current_page < last_page %}
-    <a href="/{{board.url}}/page/{{ current_page|add:"1" }}">{% localize on %}Next{% endlocalize %}</a>
+        {% with next_page=current_page|add:"1" %}
+        <a href="{% url 'board:board_detail' board.url next_page %}">{% localize on %}Next{% endlocalize %}</a>
+        {% endwith %}
     {% endif %}
 </div>
 {% endblock content %}

board/views.py

@@ -3,6 +3,7 @@ from django.http import Http404, HttpResponseRedirect
 from django.shortcuts import render, get_object_or_404
 from django.views.generic import DetailView
 from django.views.generic.edit import CreateView
+from django.urls import reverse
 from board.models import Post, Board
 from board.forms import PostForm, ReplyForm
 
@@ -54,8 +55,16 @@ class BoardView(CreatePostView):
     slug_url_kwarg = "url"
     template_name = "board/board_detail.html"
 
+    def get(self, request, *args, **kwargs):
+        # If the page isn't set, then redirect to the /page/1 url
+        if "page" not in kwargs:
+            return HttpResponseRedirect(
+                reverse("board:board_detail", kwargs={"url": kwargs["url"], "page": 1})
+            )
+        return super(BoardView, self).get(request, *args, **kwargs)
+
     def get_context_data(self, **kwargs):
-        page = self.kwargs.get("page", 1)
+        page = self.kwargs["page"]
 
         if page not in range(1, self.board.max_pages + 1):
             raise Http404()