Add 'other discussions' tab for self-posts

Shows submissions linking to the self-post

r2/r2/controllers/front.py

@@ -759,16 +759,11 @@ class FrontController(RedditController, OAuth2ResourceController):
         if not can_view_link_comments(article):
             abort(403, 'forbidden')
 
-        # only look up duplicates if it's not a self-post
-        if not getattr(article, 'is_self', False):
-            builder = url_links_builder(article.url, exclude=article._fullname,
-                                        num=num, after=after, reverse=reverse,
-                                        count=count)
-            num_duplicates = len(builder.get_items()[0])
-            listing = LinkListing(builder).listing()
-        else:
-            num_duplicates = 0
-            listing = None
+        builder = url_links_builder(article.url, exclude=article._fullname,
+                                    num=num, after=after, reverse=reverse,
+                                    count=count)
+        num_duplicates = len(builder.get_items()[0])
+        listing = LinkListing(builder).listing()
 
         res = LinkInfoPage(link=article,
                            comment=None,

r2/r2/lib/pages/pages.py

@@ -1167,7 +1167,7 @@ class LinkInfoPage(Reddit):
             buttons.extend([info_button('comments'),
                             info_button('related')])
 
-            if not self.link.is_self and self.num_duplicates > 0:
+            if self.num_duplicates > 0:
                 buttons.append(info_button('duplicates', num=self.num_duplicates))
 
         if c.user_is_admin:

r2/r2/lib/utils/utils.py

@@ -1030,9 +1030,13 @@ def filter_links(links, filter_spam = False, multiple = True):
 
 def url_links_builder(url, exclude=None, num=None, after=None, reverse=None,
                       count=None):
+    from r2.lib.template_helpers import add_sr
     from r2.models import IDBuilder, Link, NotFound
     from operator import attrgetter
 
+    if url.startswith('/'):
+        url = add_sr(url, force_hostname=True)
+
     try:
         links = tup(Link._by_url(url, None))
     except NotFound: