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
|
from psycopg.adapt import Loader, Dumper
from psycopg.pq import Format
from ..utils import SparseVector
class SparseVectorDumper(Dumper):
format = Format.TEXT
def dump(self, obj):
return SparseVector._to_db(obj).encode('utf8')
class SparseVectorBinaryDumper(SparseVectorDumper):
format = Format.BINARY
def dump(self, obj):
return SparseVector._to_db_binary(obj)
class SparseVectorLoader(Loader):
format = Format.TEXT
def load(self, data):
if isinstance(data, memoryview):
data = bytes(data)
return SparseVector._from_db(data.decode('utf8'))
class SparseVectorBinaryLoader(SparseVectorLoader):
format = Format.BINARY
def load(self, data):
if isinstance(data, memoryview):
data = bytes(data)
return SparseVector._from_db_binary(data)
def register_sparsevec_info(context, info):
info.register(context)
# add oid to anonymous class for set_types
text_dumper = type('', (SparseVectorDumper,), {'oid': info.oid})
binary_dumper = type('', (SparseVectorBinaryDumper,), {'oid': info.oid})
adapters = context.adapters
adapters.register_dumper(SparseVector, text_dumper)
adapters.register_dumper(SparseVector, binary_dumper)
adapters.register_loader(info.oid, SparseVectorLoader)
adapters.register_loader(info.oid, SparseVectorBinaryLoader)
|
