rainbowstream/db.py

   1 import os
   2 from sqlalchemy import create_engine
   3 from sqlalchemy.orm import sessionmaker
   4 from table_def import Map
   5 from .table_def import *
   6
   7
   8 class RainbowDB():
   9
  10     engine = None
  11
  12     def __init__(self):
  13         if not os.path.isfile('rainbow.db'):
  14             init_db()
  15         self.engine = create_engine('sqlite:///rainbow.db', echo=False)
  16
  17     def store(self, tweet_id):
  18         """
  19         Store tweet id
  20         """
  21         Session = sessionmaker(bind=self.engine)
  22         session = Session()
  23         m = Map(tweet_id)
  24         session.add(m)
  25         session.commit()
  26
  27     def rainbow_query(self, rid):
  28         """
  29         Query base of rainbow id
  30         """
  31         Session = sessionmaker(bind=self.engine)
  32         session = Session()
  33         res = session.query(Map).filter("rainbow_id =:rid").params(rid=rid).all()
  34         return res
  35
  36     def tweet_query(self, tid):
  37         """
  38         Query base of tweet id
  39         """
  40         Session = sessionmaker(bind=self.engine)
  41         session = Session()
  42         res = session.query(Map).filter("tweet_id =:tid").params(tid=tid).all()
  43         return res
  44
  45     def truncate(self):
  46         """
  47         Truncate table
  48         """
  49         Session = sessionmaker(bind=self.engine)
  50         session = Session()
  51         session.query(Map).delete()
  52         session.commit()