144 lines
4.6 KiB
Python
144 lines
4.6 KiB
Python
from trytond.osv import fields, OSV
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STATES = {
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'readonly': "active == False",
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}
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class UomCategory(OSV):
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'Product uom category'
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_name = 'product.uom.category'
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_description = __doc__
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_order = 'name'
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name = fields.Char('Name', size=64, required=True)
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UomCategory()
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class Uom(OSV):
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'Unit of measure'
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_name = 'product.uom'
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_description = __doc__
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_order = 'name'
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name = fields.Char('Name', size=64, required=True, states=STATES,)
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category = fields.Many2One('product.uom.category', 'UOM Category',
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required=True, ondelete='cascade',
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states=STATES,)
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rate = fields.Float('Rate', digits=(12, 6), required=True,
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on_change = ['rate'],states=STATES,
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help='The coefficient for the formula:\n' \
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'1 (base unit) = coef (this unit)')
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factor = fields.Function("_factor", fnct_inv="_factor_inv",
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digits=(12, 6),states=STATES,
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method=True, string='Factor',
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on_change = ['factor'],
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help='The coefficient for the formula:\n' \
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'coef (base unit) = 1 (this unit)')
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factor_data = fields.Float('Factor', digits=(12, 6), states=STATES,)
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rounding = fields.Float('Rounding Precision', digits=(16, 3),
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required=True,states=STATES,)
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active = fields.Boolean('Active')
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def _factor(self, cursor, user, ids, name, arg, context):
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res = {}
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for uom in self.browse(cursor, user, ids, context=context):
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if uom.rate:
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if uom.factor_data:
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res[uom.id] = uom.factor_data
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else:
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res[uom.id] = round(1 / uom.rate, 6)
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else:
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res[uom.id] = 0.0
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return res
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def _factor_inv(self, cursor, user, id, name, value, arg, context=None):
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if context and 'read_delta' in context:
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context = context.copy()
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del context['read_delta']
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if value:
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data = 0.0
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if round(1 / round(1/value, 6), 6) != value:
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data = value
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self.write(cursor, user, id, {
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'rate': round(1/value, 6),
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'factor_data': data,
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}, context=context)
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else:
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self.write(cursor, user, id, {
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'rate': 0.0,
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'factor_data': 0.0,
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}, context=context)
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def default_rate(self, cursor, user, context=None):
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return 1.0
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def default_factor(self, cursor, user, context=None):
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return 1.0
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def default_active(self, cursor, user, context=None):
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return 1
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def default_rounding(self, cursor, user, context=None):
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return 0.01
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def on_change_factor(self, cursor, user, ids, value, context=None):
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if value.get('factor', 0.0) == 0.0:
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return {'value': {'rate': 0}}
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return {'rate': round(1/value['factor'], 6)}
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def on_change_rate(self, cursor, user, ids, value, context=None):
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if value.get('rate', 0.0) == 0.0:
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return {'value': {'factor': 0}}
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return {'factor': round(1/value['rate'], 6)}
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def _compute_qty(self, cursor, user, from_uom_id, qty, to_uom=False):
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"""
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Convert quantity for given uom's. from_uom and to_uom should
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be browse records.
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"""
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if not from_uom or not qty or not to_uom:
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return qty
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if from_uom.category.id <> to_uom.category.id:
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return qty
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if from_uom.factor_data:
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amount = qty * from_uom.factor_data
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else:
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amount = qty / from_uom.factor
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if to_uom:
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if to_uom.factor_data:
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amount = rounding(amount / to_uom.factor_data, to_uom.rounding)
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else:
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amount = rounding(amount * to_uom.factor, to_uom.rounding)
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return amount
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def _compute_price(self, cursor, user, from_uom, price, to_uom=False):
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"""
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Convert price for given uom's. from_uom and to_uom should be
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browse records.
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"""
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if not from_uom or not price or not to_uom:
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return price
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if from_uom.category.id <> to_uom.category.id:
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return price
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if from_uom.factor_data:
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new_price = float(price) / from_uom.factor_data
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else:
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new_price = float(price) * from_uom.factor
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if to_uom.factor_data:
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new_price = new_price * to_uom.factor_data
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else:
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new_price = new_price / to_uom.factor
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return new_price
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Uom()
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