added deploys

db/manager.py

@@ -1,10 +1,9 @@
 from bson import ObjectId
 from mongoengine import connect
-from pymongo import MongoClient
+from pymongo import MongoClient, DESCENDING
 from config.db import MONGO_HOST, MONGO_PORT, MONGO_DB
 from utils import is_object_id
 
-
 connect(db=MONGO_DB, host=MONGO_HOST, port=MONGO_PORT)
 
 
@@ -48,5 +47,11 @@ class DbManager(object):
         col = self.db[col_name]
         return col.count(cond)
 
+    def get_latest_version(self, spider_id):
+        col = self.db['deploys']
+        for item in col.find({'spider_id': ObjectId(spider_id)}).sort('version', DESCENDING):
+            return item.version
+        return None
+
 
 db_manager = DbManager()