I use Entry to control the data. The SQLAction only do easy works.
Python, 213 lines
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# -*- coding:utf-8 -*-
# author: lintao
import MySQLdb
from gensql import gensql
from Entry import Entry
class Error(Exception):
pass
class SQLAction(object):
def __init__(self, logininfo):
self.__login(logininfo)
self.__entryies = {}
self.cursor = {}
def __login(self, logininfo):
try:
self.conn = MySQLdb.connect(
**logininfo)
except:
raise Error,"Login failed"
def execute(self, sql, tablename):
self.cursor[tablename] = self.conn.cursor()
self.cursor[tablename].execute(sql)
def commit(self):
self.conn.commit()
def __describe(self, tablename):
sql = "describe %s;"%tablename
self.execute(sql, tablename)
return list(i[0] for i in self.cursor[tablename].fetchall())
pass
# Begin with statement, select
def select(self, tablename, conddicts=None):
return self.innerSelect(self, tablename, conddicts)
class innerSelect(object):
def __init__(self, outer, tablename, cond=None):
self.outer = outer
self.tablename = tablename
self.cond = cond
self.entry = self.outer.getentry(self.tablename)
self.select()
def select(self):
sql = gensql("select", \
self.tablename, \
self.entry.getfield(), \
self.cond)
#print sql
self.outer.execute(sql, self.tablename)
pass
def next(self):
tmpone = self.outer.cursor[self.tablename].fetchone()
if not tmpone:
return False
with self.entry.edit():
self.entry.update(dict(zip(self.entry.getfield(), tmpone)))
self.entry.enablequery()
return True
def __enter__(self):
self.entry.enablequery()
return self
pass
def __getitem__(self, key):
return self.entry[key]
def __setitem__(self, key, value):
raise Error, "Can't set key and value"
def __exit__(self, exc_type, exc_value, traceback):
self.entry.disablequery()
pass
# End with statement, select
# Begin with statement, update
def update(self, tablename, conddicts):
return self.innerUpdate(self, tablename, conddicts)
class innerUpdate(object):
def __init__(self, outer, tablename, cond):
self.outer = outer
self.tablename = tablename
self.cond = cond
self.entry = self.outer.getentry(self.tablename)
self.select()
def __getitem__(self, key):
return self.entry[key]
def __setitem__(self, key, value):
self.entry[key] = value
def select(self):
sql = gensql("select", \
self.tablename, \
self.entry.getfield(), \
self.cond)
#print sql
self.outer.execute(sql, self.tablename)
pass
def next(self):
tmpone = self.outer.cursor[self.tablename].fetchone()
if not tmpone:
return False
with self.entry.edit():
self.entry.update(dict(zip(self.entry.getfield(), tmpone)))
self.entry.enableedit()
self.oldentry = self.entry.copydict()
return True
def update(self):
sql = gensql("update", \
self.tablename, \
self.entry.copydict(), \
self.oldentry)
self.outer.execute(sql, self.tablename)
self.outer.commit()
pass
def ok(self):
self.update()
def __enter__(self):
self.entry.enableedit()
return self
pass
def __exit__(self, exc_type, exc_value, traceback):
self.entry.disableedit()
pass
# End with statement, update
# Begin with statement, insert
def insert(self, tablename):
return self.innerInsert(self, tablename)
class innerInsert(object):
def __init__(self, outer, tablename):
self.outer = outer
self.tablename = tablename
self.entry = self.outer.getentry(self.tablename)
def __enter__(self):
self.entry.enableedit()
return self
pass
def __getitem__(self, key):
return self.entry[key]
def __setitem__(self, key, value):
self.entry[key] = value
def ok(self):
self.insert()
def insert(self):
sql = gensql("insert", \
self.tablename, \
self.entry.copydict())
self.outer.execute(sql, self.tablename)
self.outer.commit()
def __exit__(self, exc_type, exc_value, traceback):
self.entry.disableedit()
pass
# End with statement, insert
def newentry(self, tablename):
self.__entryies[tablename] = Entry(self.__describe(tablename))
def getentry(self, tablename):
return self.__entryies.get(tablename, None)
if __name__ == "__main__":
logininfo = {"user":"lint", "host":"localhost", "passwd":"123456", "db":"TestBesBkk"}
sqlaction = SQLAction(logininfo)
sqlaction.newentry("person")
oneentry = sqlaction.getentry("person")
#with oneentry.edit():
# oneentry["id_p"] = "5"
# oneentry["name_p"] = "lint07"
# oneentry["age"] = 22
#with oneentry.query():
# print oneentry["id_p"]
# print oneentry["name_p"]
# print oneentry["age"]
#print sqlaction.cursor
#with sqlaction.insert("person") as s:
# s["id_p"] = 1000
# s["name_p"] = "lintao07"
# s["age"] = 22222
# s.ok()
with sqlaction.update("person", {"id_p":1000}) as s:
while s.next():
s["name_p"] = s["name_p"] + str(s["age"])
s["age"] = 55555
s.ok()
#with sqlaction.select("person", None) as s:
# print s.entry.getfield()
# while s.next():
# print s["id_p"]
# print s["name_p"]
# print s["age"]
# #print s["noage"]
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