URLs are now unique.

lolbot.py

@@ -78,7 +78,7 @@ class Url(SqlBase):
   id        = Column(Integer, primary_key=True)
   timestamp = Column(DateTime)
   nickname  = Column(String(20))
-  url       = Column(String(200))
+  url       = Column(String(200), unique=True)
   title     = Column(Text)
 
   def __init__(self, nickname, url, title=None, timestamp=None):
@@ -193,10 +193,18 @@ class LolBot(SingleServerIRCBot):
     return datetime.today().strftime("%Y-%m-%d %H:%M:%S")
 
   def save_url(self, nickname, url):
-    theurl = Url(nickname, url)
     db = self.get_session()
-    db.add(theurl)
-    db.commit()
+    if not db.query(Url).filter(Url.url == url).count():
+      theurl = Url(nickname, url)
+      db.add(theurl)
+      db.commit()
+    else:
+      try:
+        theurl = db.query(Url).filter(Url.url == url).one()
+      except MultipleResultsFound, ex:
+        print ex  #wtf
+      except NoResultsFound, ex:
+        print ex  #wtf
     print theurl
     return theurl.title