/usr/lib/python3/dist-packages/trytond/ir/sequence.py is in tryton-server 4.6.3-2.
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 string import Template
import time
from sql import Literal, For
from ..model import ModelView, ModelSQL, fields, Check
from ..tools import datetime_strftime
from ..pyson import Eval, And
from ..transaction import Transaction
from ..pool import Pool
from .. import backend
__all__ = [
'SequenceType', 'Sequence', 'SequenceStrict',
]
sql_sequence = backend.get('Database').has_sequence()
class SequenceType(ModelSQL, ModelView):
"Sequence type"
__name__ = 'ir.sequence.type'
name = fields.Char('Sequence Name', required=True, translate=True)
code = fields.Char('Sequence Code', required=True)
class Sequence(ModelSQL, ModelView):
"Sequence"
__name__ = 'ir.sequence'
_strict = False
name = fields.Char('Sequence Name', required=True, translate=True)
code = fields.Selection('code_get', 'Sequence Code', required=True,
states={
'readonly': Eval('context', {}).contains('code'),
})
active = fields.Boolean('Active')
prefix = fields.Char('Prefix')
suffix = fields.Char('Suffix')
type = fields.Selection([
('incremental', 'Incremental'),
('decimal timestamp', 'Decimal Timestamp'),
('hexadecimal timestamp', 'Hexadecimal Timestamp'),
], 'Type')
number_next_internal = fields.Integer('Next Number',
states={
'invisible': ~Eval('type').in_(['incremental']),
'required': And(Eval('type').in_(['incremental']),
not sql_sequence),
}, depends=['type'])
number_next = fields.Function(number_next_internal, 'get_number_next',
'set_number_next')
number_increment = fields.Integer('Increment Number',
states={
'invisible': ~Eval('type').in_(['incremental']),
'required': Eval('type').in_(['incremental']),
}, depends=['type'])
padding = fields.Integer('Number padding',
states={
'invisible': ~Eval('type').in_(['incremental']),
'required': Eval('type').in_(['incremental']),
}, depends=['type'])
timestamp_rounding = fields.Float('Timestamp Rounding', required=True,
states={
'invisible': ~Eval('type').in_(
['decimal timestamp', 'hexadecimal timestamp']),
}, depends=['type'])
timestamp_offset = fields.Float('Timestamp Offset', required=True,
states={
'invisible': ~Eval('type').in_(
['decimal timestamp', 'hexadecimal timestamp']),
}, depends=['type'])
last_timestamp = fields.Integer('Last Timestamp',
states={
'invisible': ~Eval('type').in_(
['decimal timestamp', 'hexadecimal timestamp']),
'required': Eval('type').in_(
['decimal timestamp', 'hexadecimal timestamp']),
}, depends=['type'])
@classmethod
def __setup__(cls):
super(Sequence, cls).__setup__()
table = cls.__table__()
cls._sql_constraints += [
('check_timestamp_rounding',
Check(table, table.timestamp_rounding > 0),
'Timestamp rounding should be greater than 0'),
]
cls._error_messages.update({
'missing': 'Missing sequence.',
'invalid_prefix': ('Invalid prefix "%(prefix)s" on sequence '
'"%(sequence)s".'),
'invalid_suffix': ('Invalid suffix "%(suffix)s" on sequence '
'"%(sequence)s".'),
'future_last_timestamp': ('Last Timestamp cannot be in the '
'future on sequence "%s".'),
})
@classmethod
def __register__(cls, module_name):
TableHandler = backend.get('TableHandler')
table = TableHandler(cls, module_name)
transaction = Transaction()
# Migration from 2.0 rename number_next into number_next_internal
table.column_rename('number_next', 'number_next_internal')
super(Sequence, cls).__register__(module_name)
# Migration from 2.0 create sql_sequence
if sql_sequence and not cls._strict:
sequences = cls.search([])
for sequence in sequences:
if sequence.type != 'incremental':
continue
if not transaction.database.sequence_exist(
transaction.connection, sequence._sql_sequence_name):
sequence.create_sql_sequence(sequence.number_next_internal)
@staticmethod
def default_active():
return True
@staticmethod
def default_type():
return 'incremental'
@staticmethod
def default_number_increment():
return 1
@staticmethod
def default_number_next():
return 1
@staticmethod
def default_padding():
return 0
@staticmethod
def default_timestamp_rounding():
return 1.0
@staticmethod
def default_timestamp_offset():
return 946681200.0 # Offset for 2000-01-01
@staticmethod
def default_last_timestamp():
return 0
@staticmethod
def default_code():
return Transaction().context.get('code')
def get_number_next(self, name):
if self.type != 'incremental':
return
transaction = Transaction()
if sql_sequence and not self._strict:
return transaction.database.sequence_next_number(
transaction.connection, self._sql_sequence_name)
else:
return self.number_next_internal
@classmethod
def set_number_next(cls, sequences, name, value):
super(Sequence, cls).write(sequences, {
'number_next_internal': value,
})
@classmethod
def view_attributes(cls):
return [
('//group[@id="incremental"]', 'states', {
'invisible': ~Eval('type').in_(['incremental']),
}),
('//group[@id="timestamp"]', 'states', {
'invisible': ~Eval('type').in_(
['decimal timestamp', 'hexadecimal timestamp']),
}),
]
@classmethod
def create(cls, vlist):
sequences = super(Sequence, cls).create(vlist)
for sequence, values in zip(sequences, vlist):
if sql_sequence and not cls._strict:
sequence.update_sql_sequence(values.get('number_next',
cls.default_number_next()))
return sequences
@classmethod
def write(cls, sequences, values, *args):
super(Sequence, cls).write(sequences, values, *args)
if sql_sequence and not cls._strict:
actions = iter((sequences, values) + args)
for sequences, values in zip(actions, actions):
for sequence in sequences:
sequence.update_sql_sequence(values.get('number_next'))
@classmethod
def delete(cls, sequences):
if sql_sequence and not cls._strict:
for sequence in sequences:
sequence.delete_sql_sequence()
return super(Sequence, cls).delete(sequences)
@classmethod
def code_get(cls):
pool = Pool()
SequenceType = pool.get('ir.sequence.type')
sequence_types = SequenceType.search([])
return [(x.code, x.name) for x in sequence_types]
@classmethod
def validate(cls, sequences):
super(Sequence, cls).validate(sequences)
cls.check_prefix_suffix(sequences)
cls.check_last_timestamp(sequences)
@classmethod
def check_prefix_suffix(cls, sequences):
"Check prefix and suffix"
for sequence in sequences:
for fix, error_message in ((sequence.prefix, 'invalid_prefix'),
(sequence.suffix, 'invalid_suffix')):
try:
cls._process(sequence.prefix)
cls._process(sequence.suffix)
except Exception:
cls.raise_user_error(error_message, {
'prefix': fix,
'sequence': sequence.rec_name,
})
@classmethod
def check_last_timestamp(cls, sequences):
"Check last_timestamp"
for sequence in sequences:
next_timestamp = cls._timestamp(sequence)
if (sequence.last_timestamp is not None
and sequence.last_timestamp > next_timestamp):
cls.raise_user_error('future_last_timestamp', (
sequence.rec_name,))
@property
def _sql_sequence_name(self):
'Return SQL sequence name'
return '%s_%s' % (self._table, self.id)
def create_sql_sequence(self, number_next=None):
'Create the SQL sequence'
transaction = Transaction()
if self.type != 'incremental':
return
if number_next is None:
number_next = self.number_next
if sql_sequence:
transaction.database.sequence_create(transaction.connection,
self._sql_sequence_name, self.number_increment, number_next)
def update_sql_sequence(self, number_next=None):
'Update the SQL sequence'
transaction = Transaction()
exist = transaction.database.sequence_exist(
transaction.connection, self._sql_sequence_name)
if self.type != 'incremental':
if exist:
self.delete_sql_sequence()
return
if not exist:
self.create_sql_sequence(number_next)
return
if number_next is None:
number_next = self.number_next
transaction.database.sequence_update(transaction.connection,
self._sql_sequence_name, self.number_increment, number_next)
def delete_sql_sequence(self):
'Delete the SQL sequence'
transaction = Transaction()
if self.type != 'incremental':
return
transaction.database.sequence_delete(
transaction.connection, self._sql_sequence_name)
@classmethod
def _process(cls, string, date=None):
return Template(string or '').substitute(
**cls._get_substitutions(date))
@classmethod
def _get_substitutions(cls, date):
'''
Returns a dictionary with the keys and values of the substitutions
available to format the sequence
'''
pool = Pool()
Date = pool.get('ir.date')
if not date:
date = Date.today()
return {
'year': datetime_strftime(date, '%Y'),
'month': datetime_strftime(date, '%m'),
'day': datetime_strftime(date, '%d'),
}
@staticmethod
def _timestamp(sequence):
return int((time.time() - sequence.timestamp_offset)
/ sequence.timestamp_rounding)
@classmethod
def _get_sequence(cls, sequence):
if sequence.type == 'incremental':
if sql_sequence and not cls._strict:
cursor = Transaction().connection.cursor()
cursor.execute('SELECT nextval(\'"%s"\')'
% sequence._sql_sequence_name)
number_next, = cursor.fetchone()
else:
# Pre-fetch number_next
number_next = sequence.number_next_internal
cls.write([sequence], {
'number_next_internal': (number_next
+ sequence.number_increment),
})
return '%%0%sd' % sequence.padding % number_next
elif sequence.type in ('decimal timestamp', 'hexadecimal timestamp'):
timestamp = sequence.last_timestamp
while timestamp == sequence.last_timestamp:
timestamp = cls._timestamp(sequence)
cls.write([sequence], {
'last_timestamp': timestamp,
})
if sequence.type == 'decimal timestamp':
return '%d' % timestamp
else:
return hex(timestamp)[2:].upper()
return ''
@classmethod
def get_id(cls, domain, _lock=False):
'''
Return sequence value for the domain
'''
if isinstance(domain, cls):
domain = domain.id
if isinstance(domain, int):
domain = [('id', '=', domain)]
# bypass rules on sequences
with Transaction().set_context(user=False, _check_access=False):
with Transaction().set_user(0):
try:
sequence, = cls.search(domain, limit=1)
except TypeError:
cls.raise_user_error('missing')
if _lock:
transaction = Transaction()
database = transaction.database
connection = transaction.connection
if not database.has_select_for():
database.lock(connection, cls._table)
else:
table = cls.__table__()
query = table.select(Literal(1),
where=table.id == sequence.id,
for_=For('UPDATE', nowait=True))
cursor = connection.cursor()
cursor.execute(*query)
date = Transaction().context.get('date')
return '%s%s%s' % (
cls._process(sequence.prefix, date=date),
cls._get_sequence(sequence),
cls._process(sequence.suffix, date=date),
)
@classmethod
def get(cls, code):
return cls.get_id([('code', '=', code)])
class SequenceStrict(Sequence):
"Sequence Strict"
__name__ = 'ir.sequence.strict'
_table = None # Needed to reset Sequence._table
_strict = True
@classmethod
def get_id(cls, clause):
return super(SequenceStrict, cls).get_id(clause, _lock=True)
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