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Commit21fc671

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implement begin() (with isolation level support), commit(), rollback() for NodeConnection
1 parent8fe7527 commit21fc671

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+40
-4
lines changed

1 file changed

+40
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lines changed

‎testgres/testgres.py

Lines changed: 40 additions & 4 deletions
Original file line numberDiff line numberDiff line change
@@ -76,9 +76,45 @@ def __enter__(self):
7676
def__exit__(self,type,value,tb):
7777
self.connection.close()
7878

79-
defexecute(self,query):
80-
self.cursor.execute(query)
81-
returnself.cursor.fetchall()
79+
defbegin(self,isolation_level=0):
80+
levels= ['read uncommitted',
81+
'read committed',
82+
'repeatable read',
83+
'serializable' ]
84+
85+
# Check if level is int [0..3]
86+
ifisinstance(isolation_level,int)and \
87+
isolation_levelinrange(0,4):
88+
89+
# Replace index with isolation level type
90+
isolation_level=levels[isolation_level]
91+
92+
# Or it might be a string
93+
elifisinstance(isolation_level,str)and \
94+
str.lower(isolation_level)inlevels:
95+
96+
# Nothing to do here
97+
pass
98+
99+
# Something is wrong, emit exception
100+
else:
101+
raiseQueryException('Invalid isolation level "%s"'
102+
%isolation_level)
103+
104+
self.cursor.execute('SET TRANSACTION ISOLATION LEVEL %s'
105+
%isolation_level)
106+
107+
defcommit(self):
108+
self.connection.commit()
109+
110+
defrollback(self):
111+
self.connection.rollback()
112+
113+
defexecute(self,query,*args):
114+
self.cursor.execute(query,args)
115+
116+
ifself.cursor.rowcount>0:
117+
returnself.cursor.fetchall()
82118

83119
defclose(self):
84120
self.connection.close()
@@ -359,7 +395,7 @@ def backup(self, name):
359395

360396
returnbackup_path
361397

362-
defconnect(self,dbname):
398+
defconnect(self,dbname='postgres'):
363399
returnNodeConnection(parent_node=self,dbname=dbname)
364400

365401

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