fix missing join in full post query

app/models.py

@@ -163,7 +163,25 @@ class Topics(Model):
 class Threads(Model):
     table = "threads"
 
+    def get_posts(self, limit, offset):
+        q = Posts.FULL_POSTS_QUERY + " WHERE posts.thread_id = ? ORDER BY posts.created_at ASC LIMIT ? OFFSET ?"
+        return db.query(q, self.id, limit, offset)
+
 class Posts(Model):
+    FULL_POSTS_QUERY = """
+        SELECT
+            posts.id, posts.created_at, post_history.content, post_history.edited_at, users.username, users.status, avatars.file_path AS avatar_path, posts.thread_id, users.id AS user_id, post_history.original_markup, users.signature_rendered, threads.slug AS thread_slug, threads.is_locked AS thread_is_locked
+        FROM
+            posts
+        JOIN
+            post_history ON posts.current_revision_id = post_history.id
+        JOIN
+            users ON posts.user_id = users.id
+        JOIN
+            threads ON posts.thread_id = threads.id
+        LEFT JOIN
+            avatars ON users.avatar_id = avatars.id"""
+
     table = "posts"
 
 class PostHistory(Model):