34 lines
1.1 KiB
Python
34 lines
1.1 KiB
Python
from collections import namedtuple
|
|
import re
|
|
|
|
# Valid query types (a dictionary is used for speedy lookups).
|
|
QUERY_TERMS = set([
|
|
'exact', 'iexact', 'contains', 'icontains', 'gt', 'gte', 'lt', 'lte', 'in',
|
|
'startswith', 'istartswith', 'endswith', 'iendswith', 'range', 'year',
|
|
'month', 'day', 'week_day', 'isnull', 'search', 'regex', 'iregex',
|
|
])
|
|
|
|
# Size of each "chunk" for get_iterator calls.
|
|
# Larger values are slightly faster at the expense of more storage space.
|
|
GET_ITERATOR_CHUNK_SIZE = 100
|
|
|
|
# Separator used to split filter strings apart.
|
|
LOOKUP_SEP = '__'
|
|
|
|
# Constants to make looking up tuple values clearer.
|
|
# Join lists (indexes into the tuples that are values in the alias_map
|
|
# dictionary in the Query class).
|
|
JoinInfo = namedtuple('JoinInfo',
|
|
'table_name rhs_alias join_type lhs_alias '
|
|
'lhs_join_col rhs_join_col nullable')
|
|
|
|
# How many results to expect from a cursor.execute call
|
|
MULTI = 'multi'
|
|
SINGLE = 'single'
|
|
|
|
ORDER_PATTERN = re.compile(r'\?|[-+]?[.\w]+$')
|
|
ORDER_DIR = {
|
|
'ASC': ('ASC', 'DESC'),
|
|
'DESC': ('DESC', 'ASC'),
|
|
}
|