diff --git a/oxdata/lookup/views.py b/oxdata/lookup/views.py
index 722a215..07b898f 100644
--- a/oxdata/lookup/views.py
+++ b/oxdata/lookup/views.py
@@ -14,12 +14,12 @@ def get_movie_id(request):
     if 'movieId' in request.GET:
         movieId = request.GET['movieId']
         if len(movieId) == 7:
-            movie_id = models.MovieId.objects.get(imdb_id=movieId)
+            movie_id = models.getMovieIdByImdbId(imdb_id=movieId)
         else:
             movie_id = models.MovieId.objects.get(oxdb_id=movieId)
     if 'imdb' in request.GET:
-        imdbId = request.GET['imdb']
-        movie_id = models.MovieId.objects.get(imdb_id=imdbId)
+        movieId = request.GET['imdb']
+        movie_id = models.getMovieIdByImdbId(imdb_id=movieId)
     elif 'oxdb' in request.GET:
         oxdbId = request.GET['oxdb']
         movie_id = models.MovieId.objects.get(oxdb_id=oxdbId)
diff --git a/oxdata/poster/models.py b/oxdata/poster/models.py
index ddf39d0..904f52c 100644
--- a/oxdata/poster/models.py
+++ b/oxdata/poster/models.py
@@ -17,6 +17,8 @@ import ox.web.impawards
 from oxdata.lookup.models import MovieId
 
 def getPosters(movie_id, url_prefix='', limit=lambda x, y: x<y):
+    if not movie_id:
+        return {}
     getPosterUrls(movie_id)
     posters = {}
     if url_prefix.endswith('/'): url_prefix = url_prefix[:-1]