update django, use url instead of _get_url

oxdata/cover/models.py

@@ -20,7 +20,7 @@ def getCovers(isbn, url_prefix='', limit=lambda x, y: 0.3 < x/y < 1):
         cover = p.get()
         if cover:
             pjson = {}
-            pjson['url'] = url_prefix + cover._get_url()
+            pjson['url'] = url_prefix + cover.url
             pjson['width'] = cover.width
             pjson['height'] = cover.height
             if p.site not in ['other', 'wikipedia.org'] or limit(cover.width, cover.height):

oxdata/poster/models.py

@@ -39,7 +39,7 @@ def getPosters(movie_id, url_prefix='', limit=lambda x, y: 0.3 < x/y < 1):
             poster = None
         if poster:
             pjson = {}
-            pjson['url'] = url_prefix + poster._get_url()
+            pjson['url'] = url_prefix + poster.url
             pjson['width'] = poster.width
             pjson['height'] = poster.height
             if p.site not in ['other', 'wikipedia.org'] or limit(poster.width, poster.height):

requirements.txt

@@ -1,4 +1,4 @@
-Django==1.9.9
+Django<2
 celery==3.1.23
 django-celery==3.1.17
 django-extensions==1.7.4