blob: 9d23e5068a2e4e1e2ac29b7cf0f9b400fd2e4ef4 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
|
"""Wrapper around psycopg1/2.
Preferred is psycopg2, fallback to psycopg1.
Interface provided is psycopg1:
- dict* methods.
- new columns can be assigned to row.
"""
import sys
__all__ = []
##from psycopg2.psycopg1 import connect as _pgconnect
# psycopg2.psycopg1.cursor is too backwards compatible,
# to the point of avoiding optimized access.
# only backwards compat thing we need is dict* methods
import psycopg2.extensions, psycopg2.extras
from skytools.sqltools import dbdict
class _CompatRow(psycopg2.extras.DictRow):
"""Make DictRow more dict-like."""
__slots__ = ('_index',)
def __contains__(self, k):
"""Returns if such row has such column."""
return k in self._index
def copy(self):
"""Return regular dict."""
return dbdict(self.iteritems())
def iterkeys(self):
return self._index.iterkeys()
def itervalues(self):
return list.__iter__(self)
# obj.foo access
def __getattr__(self, k):
return self[k]
class _CompatCursor(psycopg2.extras.DictCursor):
"""Regular psycopg2 DictCursor with dict* methods."""
def __init__(self, *args, **kwargs):
psycopg2.extras.DictCursor.__init__(self, *args, **kwargs)
self.row_factory = _CompatRow
dictfetchone = psycopg2.extras.DictCursor.fetchone
dictfetchall = psycopg2.extras.DictCursor.fetchall
dictfetchmany = psycopg2.extras.DictCursor.fetchmany
class _CompatConnection(psycopg2.extensions.connection):
"""Connection object that uses _CompatCursor."""
def cursor(self):
return psycopg2.extensions.connection.cursor(self, cursor_factory = _CompatCursor)
def connect_database(connstr):
"""Create a db connection with connect_timeout option.
Default connect_timeout is 15, to change put it directly into dsn.
"""
# allow override
if connstr.find("connect_timeout") < 0:
connstr += " connect_timeout=15"
# create connection
return _CompatConnection(connstr)
|
