Cédric Krier
fc6c6cfdda
* Use python-sql * Add convert_domain method on Fields * Add sql_format and sql_type methods on Fields * Allow to return a full domain for Function.searcher * Replace static backend by dynamic get method * Replace order_field by order_<field name> method review1001002
438 lines
18 KiB
Python
438 lines
18 KiB
Python
#This file is part of Tryton. The COPYRIGHT file at the top level of
|
|
#this repository contains the full copyright notices and license terms.
|
|
|
|
from trytond.backend.table import TableHandlerInterface
|
|
import logging
|
|
|
|
__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 = {}
|
|
|
|
# Create sequence if necessary
|
|
if not self.sequence_exist(self.cursor, self.sequence_name):
|
|
self.cursor.execute('CREATE SEQUENCE "%s"' % self.sequence_name)
|
|
|
|
# Create new table if necessary
|
|
if not self.table_exist(self.cursor, self.table_name):
|
|
self.cursor.execute('CREATE TABLE "%s" ()' % self.table_name)
|
|
|
|
if model.__doc__:
|
|
self.cursor.execute('COMMENT ON TABLE "%s" IS \'%s\'' %
|
|
(self.table_name, model.__doc__.replace("'", "''")))
|
|
|
|
self._update_definitions()
|
|
if 'id' not in self._columns:
|
|
if not self.history:
|
|
self.cursor.execute('ALTER TABLE "%s" '
|
|
'ADD COLUMN id INTEGER '
|
|
'DEFAULT nextval(\'"%s"\') NOT NULL'
|
|
% (self.table_name, self.sequence_name))
|
|
self.cursor.execute('ALTER TABLE "%s" '
|
|
'ADD PRIMARY KEY(id)' % self.table_name)
|
|
else:
|
|
self.cursor.execute('ALTER TABLE "%s" '
|
|
'ADD COLUMN id INTEGER' % self.table_name)
|
|
self._update_definitions()
|
|
if self.history and not '__id' in self._columns:
|
|
self.cursor.execute('ALTER TABLE "%s" '
|
|
'ADD COLUMN __id INTEGER '
|
|
'DEFAULT nextval(\'"%s"\') NOT NULL' %
|
|
(self.table_name, self.sequence_name))
|
|
self.cursor.execute('ALTER TABLE "%s" '
|
|
'ADD PRIMARY KEY(__id)' % self.table_name)
|
|
if self.history:
|
|
self.cursor.execute('ALTER TABLE "%s" '
|
|
'ALTER __id SET DEFAULT nextval(\'"%s"\')'
|
|
% (self.table_name, self.sequence_name))
|
|
else:
|
|
self.cursor.execute('ALTER TABLE "%s" '
|
|
'ALTER id SET DEFAULT nextval(\'"%s"\')'
|
|
% (self.table_name, self.sequence_name))
|
|
self._update_definitions()
|
|
|
|
@staticmethod
|
|
def table_exist(cursor, table_name):
|
|
cursor.execute("SELECT relname FROM pg_class "
|
|
"WHERE relkind = 'r' AND relname = %s",
|
|
(table_name,))
|
|
return bool(cursor.rowcount)
|
|
|
|
@staticmethod
|
|
def table_rename(cursor, old_name, new_name):
|
|
#Rename table
|
|
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 sequence
|
|
old_sequence = old_name + '_id_seq'
|
|
new_sequence = new_name + '_id_seq'
|
|
TableHandler.sequence_rename(cursor, old_sequence, new_sequence)
|
|
#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):
|
|
cursor.execute('SELECT relname FROM pg_class '
|
|
'WHERE relkind = \'S\' and relname = %s', (sequence_name,))
|
|
return bool(cursor.rowcount)
|
|
|
|
@staticmethod
|
|
def sequence_rename(cursor, old_name, new_name):
|
|
if (TableHandler.sequence_exist(cursor, old_name)
|
|
and not TableHandler.sequence_exist(cursor, new_name)):
|
|
cursor.execute('ALTER TABLE "%s" RENAME TO "%s"'
|
|
% (old_name, new_name))
|
|
|
|
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)):
|
|
self.cursor.execute('ALTER TABLE "%s" '
|
|
'RENAME COLUMN "%s" TO "%s"'
|
|
% (self.table_name, old_name, new_name))
|
|
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("SELECT at.attname, at.attlen, "
|
|
"at.atttypmod, at.attnotnull, at.atthasdef, ty.typname, "
|
|
"CASE WHEN at.attlen = -1 "
|
|
"THEN at.atttypmod-4 "
|
|
"ELSE at.attlen END as size "
|
|
"FROM pg_class cl "
|
|
"JOIN pg_attribute at on (cl.oid = at.attrelid) "
|
|
"JOIN pg_type ty on (at.atttypid = ty.oid) "
|
|
"WHERE cl.relname = %s AND at.attnum > 0",
|
|
(self.table_name,))
|
|
self._columns = {}
|
|
for line in self.cursor.fetchall():
|
|
column, length, typmod, notnull, hasdef, typname, size = line
|
|
self._columns[column] = {
|
|
"length": length,
|
|
"typmod": typmod,
|
|
"notnull": notnull,
|
|
"hasdef": hasdef,
|
|
"size": size,
|
|
"typname": typname}
|
|
|
|
# fetch constraints for the table
|
|
self.cursor.execute("SELECT co.contype, co.confdeltype, at.attname, "
|
|
"cl2.relname, co.conname "
|
|
"FROM pg_constraint co "
|
|
"LEFT JOIN pg_class cl ON (co.conrelid = cl.oid) "
|
|
"LEFT JOIN pg_class cl2 ON (co.confrelid = cl2.oid) "
|
|
"LEFT JOIN pg_attribute at ON (co.conkey[1] = at.attnum) "
|
|
"WHERE cl.relname = %s AND at.attrelid = cl.oid",
|
|
(self.table_name,))
|
|
self._constraints = []
|
|
self._fk_deltypes = {}
|
|
for line in self.cursor.fetchall():
|
|
contype, confdeltype, column, ref, conname = line
|
|
if contype == 'f':
|
|
self._fk_deltypes[column] = confdeltype
|
|
if conname not in self._constraints:
|
|
self._constraints.append(conname)
|
|
|
|
# Fetch indexes defined for the table
|
|
self.cursor.execute("SELECT cl2.relname "
|
|
"FROM pg_index ind "
|
|
"JOIN pg_class cl on (cl.oid = ind.indrelid) "
|
|
"JOIN pg_class cl2 on (cl2.oid = ind.indexrelid) "
|
|
"WHERE cl.relname = %s",
|
|
(self.table_name,))
|
|
self._indexes = [l[0] 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 = %s',
|
|
(self.object_name,))
|
|
for line in self.cursor.fetchall():
|
|
self._field2module[line[0]] = line[1]
|
|
|
|
def alter_size(self, column_name, column_type):
|
|
|
|
self.cursor.execute("ALTER TABLE \"%s\" "
|
|
"RENAME COLUMN \"%s\" TO _temp_change_size"
|
|
% (self.table_name, column_name))
|
|
self.cursor.execute("ALTER TABLE \"%s\" "
|
|
"ADD COLUMN \"%s\" %s"
|
|
% (self.table_name, column_name, column_type))
|
|
self.cursor.execute("UPDATE \"%s\" "
|
|
"SET \"%s\" = _temp_change_size::%s"
|
|
% (self.table_name, column_name, column_type))
|
|
self.cursor.execute("ALTER TABLE \"%s\" "
|
|
"DROP COLUMN _temp_change_size"
|
|
% (self.table_name,))
|
|
self._update_definitions()
|
|
|
|
def alter_type(self, column_name, column_type):
|
|
self.cursor.execute('ALTER TABLE "' + self.table_name + '" '
|
|
'ALTER "' + column_name + '" TYPE ' + column_type)
|
|
self._update_definitions()
|
|
|
|
def db_default(self, column_name, value):
|
|
self.cursor.execute('ALTER TABLE "' + self.table_name + '" '
|
|
'ALTER COLUMN "' + column_name + '" SET DEFAULT %s',
|
|
(value,))
|
|
|
|
def add_raw_column(self, column_name, column_type, column_format,
|
|
default_fun=None, field_size=None, migrate=True, string=''):
|
|
def comment():
|
|
self.cursor.execute('COMMENT ON COLUMN "%s"."%s" IS \'%s\'' %
|
|
(self.table_name, column_name, string.replace("'", "''")))
|
|
if self.column_exist(column_name):
|
|
if (column_name in ('create_date', 'write_date')
|
|
and column_type[1].lower() != 'timestamp(6)'):
|
|
#Migrate dates from timestamp(0) to timestamp
|
|
self.cursor.execute('ALTER TABLE "' + self.table_name + '" '
|
|
'ALTER COLUMN "' + column_name + '" TYPE timestamp')
|
|
comment()
|
|
if not migrate:
|
|
return
|
|
base_type = column_type[0].lower()
|
|
if base_type != self._columns[column_name]['typname']:
|
|
if (self._columns[column_name]['typname'], base_type) in [
|
|
('varchar', 'text'),
|
|
('text', 'varchar'),
|
|
('date', 'timestamp'),
|
|
('int4', 'float8'),
|
|
]:
|
|
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]
|
|
self.cursor.execute('ALTER TABLE "%s" ADD COLUMN "%s" %s'
|
|
% (self.table_name, column_name, column_type))
|
|
comment()
|
|
|
|
if column_format:
|
|
# check if table is non-empty:
|
|
self.cursor.execute('SELECT 1 FROM "%s" limit 1' % self.table_name)
|
|
if self.cursor.rowcount:
|
|
# 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 + '" = %s',
|
|
(column_format(default),))
|
|
|
|
self._update_definitions()
|
|
|
|
def add_fk(self, column_name, reference, on_delete=None):
|
|
on_delete_code = {
|
|
'RESTRICT': 'r',
|
|
'NO ACTION': 'a',
|
|
'CASCADE': 'c',
|
|
'SET NULL': 'n',
|
|
'SET DEFAULT': 'd',
|
|
}
|
|
if on_delete is not None:
|
|
on_delete = on_delete.upper()
|
|
if on_delete not in on_delete_code:
|
|
raise Exception('On delete action not supported!')
|
|
else:
|
|
on_delete = 'SET NULL'
|
|
code = on_delete_code[on_delete]
|
|
|
|
self.cursor.execute('SELECT conname FROM pg_constraint '
|
|
'WHERE conname = %s',
|
|
(self.table_name + '_' + column_name + '_fkey',))
|
|
add = False
|
|
if not self.cursor.rowcount:
|
|
add = True
|
|
elif self._fk_deltypes.get(column_name) != code:
|
|
self.drop_fk(column_name)
|
|
add = True
|
|
if add:
|
|
self.cursor.execute('ALTER TABLE "' + self.table_name + '" '
|
|
'ADD FOREIGN KEY ("' + column_name + '") '
|
|
'REFERENCES "' + reference + '" '
|
|
'ON DELETE ' + on_delete)
|
|
self._update_definitions()
|
|
|
|
def drop_fk(self, column_name, table=None):
|
|
self.drop_constraint(column_name + '_fkey', table=table)
|
|
|
|
def index_action(self, column_name, action='add', table=None):
|
|
if isinstance(column_name, basestring):
|
|
column_name = [column_name]
|
|
index_name = ((table or self.table_name) + "_" + '_'.join(column_name)
|
|
+ "_index")
|
|
if self._indexes:
|
|
test_index_name = index_name[:max(map(len, self._indexes))]
|
|
else:
|
|
test_index_name = index_name
|
|
|
|
if action == 'add':
|
|
if test_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 test_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':
|
|
if self._columns[column_name]['notnull']:
|
|
return
|
|
self.cursor.execute('SELECT id FROM "%s" '
|
|
'WHERE "%s" IS NULL'
|
|
% (self.table_name, column_name))
|
|
if not self.cursor.rowcount:
|
|
self.cursor.execute('ALTER TABLE "' + self.table_name + '" '
|
|
'ALTER COLUMN "' + column_name + '" SET NOT NULL')
|
|
self._update_definitions()
|
|
else:
|
|
logging.getLogger('init').warning(
|
|
'Unable to set column %s '
|
|
'of table %s not null !\n'
|
|
'Try to re-run: '
|
|
'trytond.py --update=module\n'
|
|
'If it doesn\'t work, update records '
|
|
'and execute manually:\n'
|
|
'ALTER TABLE "%s" ALTER COLUMN "%s" SET NOT NULL'
|
|
% (column_name, self.table_name, self.table_name,
|
|
column_name))
|
|
elif action == 'remove':
|
|
if not self._columns[column_name]['notnull']:
|
|
return
|
|
if (self._field2module.get(column_name, self.module_name)
|
|
!= self.module_name):
|
|
return
|
|
self.cursor.execute('ALTER TABLE "%s" '
|
|
'ALTER COLUMN "%s" DROP NOT NULL'
|
|
% (self.table_name, column_name))
|
|
self._update_definitions()
|
|
else:
|
|
raise Exception('Not null action not supported!')
|
|
|
|
def add_constraint(self, ident, constraint, exception=False):
|
|
ident = self.table_name + "_" + ident
|
|
if ident in self._constraints:
|
|
# This constrain already exist
|
|
return
|
|
try:
|
|
self.cursor.execute('ALTER TABLE "%s" '
|
|
'ADD CONSTRAINT "%s" %s'
|
|
% (self.table_name, ident, constraint))
|
|
except Exception:
|
|
if exception:
|
|
raise
|
|
logging.getLogger('init').warning(
|
|
'unable to add \'%s\' constraint on table %s !\n'
|
|
'If you want to have it, you should update the records '
|
|
'and execute manually:\n'
|
|
'ALTER table "%s" ADD CONSTRAINT "%s" %s'
|
|
% (constraint, self.table_name, self.table_name, ident,
|
|
constraint))
|
|
self._update_definitions()
|
|
|
|
def drop_constraint(self, ident, exception=False, table=None):
|
|
ident = (table or self.table_name) + "_" + ident
|
|
if ident not in self._constraints:
|
|
return
|
|
try:
|
|
self.cursor.execute('ALTER TABLE "%s" '
|
|
'DROP CONSTRAINT "%s"'
|
|
% (self.table_name, ident))
|
|
except Exception:
|
|
if exception:
|
|
raise
|
|
logging.getLogger('init').warning(
|
|
'unable to drop \'%s\' constraint on table %s!'
|
|
% (ident, self.table_name))
|
|
self._update_definitions()
|
|
|
|
def drop_column(self, column_name, exception=False):
|
|
if not self.column_exist(column_name):
|
|
return
|
|
try:
|
|
self.cursor.execute(
|
|
'ALTER TABLE "%s" DROP COLUMN "%s"' %
|
|
(self.table_name, column_name))
|
|
|
|
except Exception:
|
|
if exception:
|
|
raise
|
|
logging.getLogger('init').warning(
|
|
'unable to drop \'%s\' column on table %s!'
|
|
% (column_name, self.table_name))
|
|
self._update_definitions()
|
|
|
|
@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)
|