63 lines
2 KiB
Python
63 lines
2 KiB
Python
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# -*- coding: utf-8 -*-
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# This file is part of the cashbook-module from m-ds for Tryton.
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# The COPYRIGHT file at the top level of this repository contains the
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# full copyright notices and license terms.
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from trytond.model import fields
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from trytond.transaction import Transaction
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from trytond.pool import Pool, PoolMeta
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from sql.aggregate import Count
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from sql.conditionals import Case
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class Currency(metaclass=PoolMeta):
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__name__ = 'currency.currency'
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cashbook_hasbookings = fields.Function(fields.Boolean(string='Has Bookings',
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readonly=True), 'on_change_with_cashbook_hasbookings',
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searcher='search_cashbook_hasbookings')
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@fields.depends('id')
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def on_change_with_cashbook_hasbookings(self, name=None):
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""" result: True if there are bookings
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"""
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Lines = Pool().get('cashbook.line')
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with Transaction().set_context({
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'_check_access': True,
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}):
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if Lines.search_count([
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('cashbook.currency.id', '=', self.id),
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]) > 0:
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return True
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return False
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@classmethod
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def search_cashbook_hasbookings(cls, name, clause):
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""" indicate existing bookings
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"""
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pool = Pool()
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Currency2 = pool.get('currency.currency')
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Cashbook = pool.get('cashbook.book')
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Line = pool.get('cashbook.line')
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tab_cur = Currency2.__table__()
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tab_book = Cashbook.__table__()
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tab_line = Line.__table__()
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Operator = fields.SQL_OPERATORS[clause[1]]
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query = tab_book.join(tab_line,
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condition=tab_book.id==tab_line.cashbook,
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).join(tab_cur,
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condition=tab_cur.id==tab_book.currency,
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).select(
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tab_cur.id,
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having=Operator(Case(
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(Count(tab_line.id) > 0, True),
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else_ = False,
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), clause[2]),
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group_by=[tab_cur.id,],
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)
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return [('id', 'in', query)]
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# end Currency
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