forked from bianle/dzml
/
orm.py
120 lines (100 loc) · 3.22 KB
/
orm.py
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# -*- coding: cp936 -*-
from copy import copy
from mysql import getDb
class Field(object):
def __init__(self, name, column_type):
self.name = name
self.column_type = column_type
def __str__(self):
return '<%s:%s>' % (self.__class__.__name__, self.name)
class StringField(Field):
def __init__(self, name):
super(StringField, self).__init__(name, 'varchar(100)')
class IntegerField(Field):
def __init__(self, name):
super(IntegerField, self).__init__(name, 'bigint')
class ModelMetaclass(type):
def __new__(cls,name,bases,attrs):
if name == 'Model':
return type.__new__(cls,name,bases,attrs)
print ('Found model: %s' % name)
mappings = dict()
for k, v in attrs.iteritems():
if isinstance(v, Field):
print('Found mapping: %s==>%s' % (k, v))
mappings[k] = v
for k in mappings.iterkeys():
attrs.pop(k)
if not attrs.has_key('__table__'):
attrs['__table__'] = name #
attrs['__mappings__'] = mappings #
return type.__new__(cls, name, bases, attrs)
class Model(dict):
__metaclass__ = ModelMetaclass
def __init__(self, **kw):
super(Model, self).__init__(**kw)
def __getattr__(self, key):
try:
return self[key]
except KeyError:
raise AttributeError(r"'Model' object has no attribute '%s'" % key)
def __setattr__(self, key, value):
self[key] = value
def modify(self,**kwargs):
params = copy(self)
try:
params['where'] = kwargs['where']
params['vars'] = kwargs['vars']
except:
params['where']='id='+str(self.id)
getDb().update(self.__table__,**params)
def remove(self):
print 'remove'
def save(self):
it = getDb().insert(self.__table__,**self)
setattr(self, 'id', it)
return it
@classmethod
def find(cls,**kwargs):
rs = getDb().select(cls.__table__,**kwargs)
return rs
@classmethod
def execute(cls,sql,**kwargs):
rs = getDb().query(sql,**kwargs)
'''
if(isinstance(rs, long)):
return rs
else:
for rcd in rs:
rcd = dict(rcd)
lst.append(rcd)
return lst
'''
return rs
'''
def save(self):
fields = []
params = []
args = []
for k, v in self.__mappings__.iteritems():
fields.append(v.name)
params.append('?')
args.append(getattr(self, k, None))
sql = 'insert into %s (%s) values (%s)' % (self.__table__, ','.join(fields), ','.join(params))
print('SQL: %s' % sql)
print('ARGS: %s' % str(args))
'''
class Url(Model):
''
__table__ = 'su_url'
id = IntegerField('id')
url = StringField('url')
hash = StringField('hash')
if __name__ == '__main__':
# r = Room(id = 1,no=2)
# r.modify()
lst = Room.find(what='id',where='id=1')
for rm in lst:
print rm
lst = Room.execute('update po_room set no=no+1 where id=$id ',id=1)
print lst