sql - Python Peewee execute_sql() example -


i using peewee module orm project.

i read entire documentation, there no clear example on how process result db.execute_sql().

i traced code, can find db.execute_sql() return cursor.

does knows how process cursor, such iterate on , result complex select statement.

update: found following source code peewee folder, should me resolve problem.

 class queryresultwrapper(object):     """     provides iterator on results of raw query, additionally doing     2 things:     - converts rows database python representations     - ensures multiple iterations not result in multiple queries     """     def __init__(self, model, cursor, meta=none):         self.model = model         self.cursor = cursor          self.__ct = 0         self.__idx = 0          self._result_cache = []         self._populated = false         self._initialized = false          if meta not none:             self.column_meta, self.join_meta = meta         else:             self.column_meta = self.join_meta = none      def __iter__(self):         self.__idx = 0          if not self._populated:             return self         else:             return iter(self._result_cache)      def process_row(self, row):         return row      def iterate(self):         row = self.cursor.fetchone()         if not row:             self._populated = true             raise stopiteration         elif not self._initialized:             self.initialize(self.cursor.description)             self._initialized = true         return self.process_row(row)      def iterator(self):         while true:             yield self.iterate()      def next(self):         if self.__idx  self.__ct):             try:                 self.next()             except stopiteration:                 break 

peewee returns cursor. can use db-api 2 iterate on it:

cursor = db.execute_sql('select * tweets;') row in cursor.fetchall():     print row  cursor = db.execute_sql('select count(*) tweets;') res = cursor.fetchone() print 'total: ', res[0] 

Comments

Popular posts from this blog

Unable to remove the www from url on https using .htaccess -