124 lines
4.0 KiB
Python
124 lines
4.0 KiB
Python
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import locale
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import platform
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import re
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import sys
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from datetime import datetime
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from time import mktime
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from .._compat import PY2, pjoin
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from .base import SQLAdapter
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from . import adapters
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@adapters.register_for('sqlite', 'sqlite:memory')
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class SQLite(SQLAdapter):
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dbengine = 'sqlite'
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drivers = ('sqlite2', 'sqlite3')
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def _initialize_(self, do_connect):
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self.pool_size = 0
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super(SQLite, self)._initialize_(do_connect)
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path_encoding = sys.getfilesystemencoding() \
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or locale.getdefaultlocale()[1] or 'utf8'
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if ':memory' in self.uri.split('://', 1)[0]:
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self.dbpath = ':memory:'
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else:
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self.dbpath = self.uri.split('://', 1)[1]
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if self.dbpath[0] != '/':
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if PY2:
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self.dbpath = pjoin(
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self.folder.decode(path_encoding).encode('utf8'),
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self.dbpath)
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else:
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self.dbpath = pjoin(self.folder, self.dbpath)
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if 'check_same_thread' not in self.driver_args:
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self.driver_args['check_same_thread'] = False
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if 'detect_types' not in self.driver_args and do_connect:
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self.driver_args['detect_types'] = self.driver.PARSE_DECLTYPES
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def _driver_from_uri(self):
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return None
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def connector(self):
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return self.driver.Connection(self.dbpath, **self.driver_args)
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@staticmethod
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def web2py_extract(lookup, s):
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table = {
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'year': (0, 4), 'month': (5, 7), 'day': (8, 10), 'hour': (11, 13),
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'minute': (14, 16), 'second': (17, 19)}
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try:
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if lookup != 'epoch':
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(i, j) = table[lookup]
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return int(s[i:j])
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else:
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return mktime(
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datetime.strptime(s, '%Y-%m-%d %H:%M:%S').timetuple())
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except:
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return None
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@staticmethod
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def web2py_regexp(expression, item):
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if item is None:
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return False
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return re.compile(expression).search(item) is not None
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def _register_extract(self):
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self.connection.create_function(
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'web2py_extract', 2, self.web2py_extract)
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def _register_regexp(self):
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self.connection.create_function(
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"REGEXP", 2, self.web2py_regexp)
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def after_connection(self):
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self._register_extract()
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self._register_regexp()
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if self.adapter_args.get('foreign_keys', True):
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self.execute('PRAGMA foreign_keys=ON;')
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def select(self, query, fields, attributes):
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if attributes.get('for_update', False) and 'cache' not in attributes:
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self.execute('BEGIN IMMEDIATE TRANSACTION;')
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return super(SQLite, self).select(query, fields, attributes)
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def delete(self, table, query):
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db = self.db
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deleted = [x[table._id.name] for x in db(query).select(table._id)]
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counter = super(SQLite, self).delete(table, query)
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if counter:
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for field in table._referenced_by:
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if field.type == 'reference ' + table._dalname \
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and field.ondelete == 'CASCADE':
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db(field.belongs(deleted)).delete()
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return counter
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@adapters.register_for('spatialite', 'spatialite:memory')
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class Spatialite(SQLite):
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dbengine = 'spatialite'
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SPATIALLIBS = {
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'Windows': 'mod_spatialite.dll',
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'Linux': 'libspatialite.so',
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'Darwin': 'libspatialite.dylib'
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}
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def after_connections(self):
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self.connection.enable_load_extension(True)
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libspatialite = self.SPATIALLIBS[platform.system()]
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self.execute(r'SELECT load_extension("%s");' % libspatialite)
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super(Spatialite, self).after_connection()
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@adapters.register_for('jdbc:sqlite', 'jdbc:sqlite:memory')
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class JDBCSQLite(SQLite):
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drivers = ('zxJDBC_sqlite',)
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def connector(self):
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return self.driver.connect(
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self.driver.getConnection('jdbc:sqlite:'+self.dbpath),
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**self.driver_args)
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def after_connection(self):
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self._register_extract()
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