Limit returned results

Limit the number of results returned to make page more
responsive. This is buggy at this point — it doesn't do exactly what I
expect, e.g. when I attempt to scroll, or use pagination, it doesn't
actually display all the pages as expected.

1 files changed, 12 insertions, 3 deletions

diff --git a/uploader/publications/views.py b/uploader/publications/views.py
index 63acf1b..8a65ff2 100644
--- a/uploader/publications/views.py
+++ b/uploader/publications/views.py
@@ -38,6 +38,10 @@ def index():
 def list_publications():
     # request breakdown:
     # https://datatables.net/manual/server-side
+    _page = int(request.args.get("draw"))
+    _length = int(request.args.get("length") or '-1')
+    _start = int(request.args.get("start") or '0')
+    _search = request.args["search[value]"]
     with (database_connection(app.config["SQL_URI"]) as conn,
           conn.cursor(cursorclass=DictCursor) as cursor):
         cursor.execute("SELECT COUNT(*) FROM Publication")
@@ -46,12 +50,17 @@ def list_publications():
             **row, "index": idx
         } for idx,row in enumerate(
             fetch_publications(
-                conn, request.args["search[value]"]), start=1))
+                conn,
+                _search,
+                offset=_length * (_page-1),
+                limit=_length),
+            start=(_start + 1)))
 
         return json.dumps({
-            "draw": request.args.get("draw"),
+            "draw": _page,
             "recordsTotal": _totalrows,
-            "recordsFiltered": len(_publications),
+            "recordsFiltered": (
+                len(_publications) if bool(_search) else _totalrows),
             "publications": _publications,
             "status": "success"
         })