/usr/lib/python2.7/dist-packages/trytond/backend/sqlite/table.py is in tryton-server 3.0.2-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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#this repository contains the full copyright notices and license terms.
from trytond.backend.table import TableHandlerInterface
import logging
import re
__all__ = ['TableHandler']
class TableHandler(TableHandlerInterface):
def __init__(self, cursor, model, module_name=None, history=False):
super(TableHandler, self).__init__(cursor, model,
module_name=module_name, history=history)
self._columns = {}
self._constraints = []
self._fk_deltypes = {}
self._indexes = []
self._field2module = {}
self._model = model
# Create new table if necessary
if not self.table_exist(self.cursor, self.table_name):
if not self.history:
self.cursor.execute('CREATE TABLE "%s" '
'(id INTEGER PRIMARY KEY AUTOINCREMENT)'
% self.table_name)
else:
self.cursor.execute('CREATE TABLE "%s" '
'(__id INTEGER PRIMARY KEY AUTOINCREMENT, '
'id INTEGER)' % self.table_name)
self._update_definitions()
@staticmethod
def table_exist(cursor, table_name):
cursor.execute("SELECT sql FROM sqlite_master "
"WHERE type = 'table' AND name = ?",
(table_name,))
res = cursor.fetchone()
if not res:
return False
sql, = res
# Migration from 1.6 add autoincrement
if not 'AUTOINCREMENT' in sql.upper():
temp_sql = sql.replace(table_name, '_temp_%s' % table_name)
cursor.execute(temp_sql)
cursor.execute('PRAGMA table_info("' + table_name + '")')
columns = ['"%s"' % column for _, column, _, _, _, _
in cursor.fetchall()]
cursor.execute(('INSERT INTO "_temp_%s" '
'(' + ','.join(columns) + ') '
'SELECT ' + ','.join(columns) +
' FROM "%s"') % (table_name, table_name))
cursor.execute('DROP TABLE "%s"' % table_name)
new_sql = sql.replace('PRIMARY KEY',
'PRIMARY KEY AUTOINCREMENT')
cursor.execute(new_sql)
cursor.execute(('INSERT INTO "%s" '
'(' + ','.join(columns) + ') '
'SELECT ' + ','.join(columns) +
' FROM "_temp_%s"') % (table_name, table_name))
cursor.execute('DROP TABLE "_temp_%s"' % table_name)
return True
@staticmethod
def table_rename(cursor, old_name, new_name):
if (TableHandler.table_exist(cursor, old_name)
and not TableHandler.table_exist(cursor, new_name)):
cursor.execute('ALTER TABLE "%s" RENAME TO "%s"'
% (old_name, new_name))
#Rename history table
old_history = old_name + "__history"
new_history = new_name + "__history"
if (TableHandler.table_exist(cursor, old_history)
and not TableHandler.table_exist(cursor, new_history)):
cursor.execute('ALTER TABLE "%s" RENAME TO "%s"'
% (old_history, new_history))
@staticmethod
def sequence_exist(cursor, sequence_name):
return True
@staticmethod
def sequence_rename(cursor, old_name, new_name):
pass
def column_exist(self, column_name):
return column_name in self._columns
def column_rename(self, old_name, new_name, exception=False):
if self.column_exist(old_name) and \
not self.column_exist(new_name):
temp_table = '_temp_%s' % self.table_name
TableHandler.table_rename(self.cursor, self.table_name,
temp_table)
new_table = TableHandler(self.cursor, self._model,
history=self.history)
for column, (notnull, hasdef, size, typname) \
in self._columns.iteritems():
if column == old_name:
column = new_name
new_table.add_raw_column(column, typname, False,
field_size=size)
new_columns = new_table._columns.keys()
old_columns = [x if x != old_name else new_name
for x in new_columns]
self.cursor.execute(('INSERT INTO "%s" (' +
','.join('"%s"' % x for x in new_columns) +
') SELECT ' +
','.join('"%s"' % x for x in old_columns) + ' ' +
'FROM "%s"') % (self.table_name, temp_table))
self.cursor.execute('DROP TABLE "%s"' % temp_table)
elif exception and self.column_exist(new_name):
raise Exception('Unable to rename column %s.%s to %s.%s: '
'%s.%s already exist!'
% (self.table_name, old_name, self.table_name, new_name,
self.table_name, new_name))
def _update_definitions(self):
# Fetch columns definitions from the table
self.cursor.execute('PRAGMA table_info("' + self.table_name + '")')
self._columns = {}
for _, column, type_, notnull, hasdef, _ in self.cursor.fetchall():
column = re.sub(r'^\"|\"$', '', column)
match = re.match(r'(\w+)(\((.*?)\))?', type_)
if match:
typname = match.group(1).upper()
size = match.group(3) and int(match.group(3)) or 0
else:
typname = type_.upper()
size = -1
self._columns[column] = {
'notnull': notnull,
'hasdef': hasdef,
'size': size,
'typname': typname,
}
# Fetch indexes defined for the table
try:
self.cursor.execute('PRAGMA index_list("' + self.table_name + '")')
except IndexError: # There is sometimes IndexError
self.cursor.execute('PRAGMA index_list("' + self.table_name + '")')
self._indexes = [l[1] for l in self.cursor.fetchall()]
# Keep track of which module created each field
self._field2module = {}
if self.object_name is not None:
self.cursor.execute('SELECT f.name, f.module '
'FROM ir_model_field f '
'JOIN ir_model m on (f.model=m.id) '
'WHERE m.model = ?',
(self.object_name,))
for line in self.cursor.fetchall():
self._field2module[line[0]] = line[1]
def alter_size(self, column_name, column_type):
logging.getLogger('init').warning(
'Unable to alter size of column %s '
'of table %s!'
% (column_name, self.table_name))
def alter_type(self, column_name, column_type):
logging.getLogger('init').warning(
'Unable to alter type of column %s '
'of table %s!'
% (column_name, self.table_name))
def db_default(self, column_name, value):
logging.getLogger('init').warning(
'Unable to set default on column %s '
'of table %s!'
% (column_name, self.table_name))
def add_raw_column(self, column_name, column_type, column_format,
default_fun=None, field_size=None, migrate=True, string=''):
if self.column_exist(column_name):
if not migrate:
return
base_type = column_type[0].upper()
if base_type != self._columns[column_name]['typname']:
if (self._columns[column_name]['typname'], base_type) in [
('VARCHAR', 'TEXT'),
('TEXT', 'VARCHAR'),
('DATE', 'TIMESTAMP'),
('INTEGER', 'FLOAT'),
]:
self.alter_type(column_name, base_type)
else:
logging.getLogger('init').warning(
'Unable to migrate column %s on table %s '
'from %s to %s.'
% (column_name, self.table_name,
self._columns[column_name]['typname'], base_type))
if (base_type == 'VARCHAR'
and self._columns[column_name]['typname'] == 'VARCHAR'):
# Migrate size
if field_size is None:
if self._columns[column_name]['size'] > 0:
self.alter_size(column_name, base_type)
elif self._columns[column_name]['size'] == field_size:
pass
elif (self._columns[column_name]['size'] > 0
and self._columns[column_name]['size'] < field_size):
self.alter_size(column_name, column_type[1])
else:
logging.getLogger('init').warning(
'Unable to migrate column %s on table %s '
'from varchar(%s) to varchar(%s).'
% (column_name, self.table_name,
self._columns[column_name]['size'] > 0
and self._columns[column_name]['size'] or "",
field_size))
return
column_type = column_type[1]
default = ''
self.cursor.execute(('ALTER TABLE "%s" ADD COLUMN "%s" %s' + default) %
(self.table_name, column_name, column_type))
if column_format:
# check if table is non-empty:
self.cursor.execute('SELECT 1 FROM "%s" limit 1' % self.table_name)
if self.cursor.fetchone():
# Populate column with default values:
default = None
if default_fun is not None:
default = default_fun()
self.cursor.execute('UPDATE "' + self.table_name + '" '
'SET "' + column_name + '" = ?',
(column_format(default),))
self._update_definitions()
def add_fk(self, column_name, reference, on_delete=None):
logging.getLogger('init').warning(
'Unable to add foreign key on table %s!'
% (self.table_name,))
def drop_fk(self, column_name, table=None):
logging.getLogger('init').warning(
'Unable to drop foreign key on table %s!'
% (self.table_name,))
def index_action(self, column_name, action='add', table=None):
if isinstance(column_name, basestring):
column_name = [column_name]
index_name = self.table_name + "_" + '_'.join(column_name) + "_index"
if action == 'add':
if index_name in self._indexes:
return
self.cursor.execute('CREATE INDEX "' + index_name + '" '
'ON "' + self.table_name + '" ( ' +
','.join('"' + x + '"' for x in column_name) +
')')
self._update_definitions()
elif action == 'remove':
if len(column_name) == 1:
if self._field2module.get(column_name[0], self.module_name) \
!= self.module_name:
return
if index_name in self._indexes:
self.cursor.execute('DROP INDEX "%s" ' % (index_name,))
self._update_definitions()
else:
raise Exception('Index action not supported!')
def not_null_action(self, column_name, action='add'):
if not self.column_exist(column_name):
return
if action == 'add':
logging.getLogger('init').warning(
'Unable to set not null on column %s '
'of table %s!'
% (column_name, self.table_name))
elif action == 'remove':
logging.getLogger('init').warning(
'Unable to remove not null on column %s '
'of table %s!'
% (column_name, self.table_name))
else:
raise Exception('Not null action not supported!')
def add_constraint(self, ident, constraint, exception=False):
logging.getLogger('init').warning(
'Unable to add constraint on table %s!'
% (self.table_name,))
def drop_constraint(self, ident, exception=False, table=None):
logging.getLogger('init').warning(
'Unable to drop constraint on table %s!'
% (self.table_name,))
def drop_column(self, column_name, exception=False):
logging.getLogger('init').warning(
'Unable to drop \'%s\' column on table %s!'
% (column_name, self.table_name))
@staticmethod
def drop_table(cursor, model, table, cascade=False):
cursor.execute('DELETE from ir_model_data where '
'model = \'%s\'' % model)
query = 'DROP TABLE "%s"' % table
if cascade:
query = query + ' CASCADE'
cursor.execute(query)
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