eiru_account_interest/models/account_interest_config.py

# -*- coding: utf-8 -*-
from openerp import models, fields, tools, api
import openerp.addons.decimal_precision as dp

class accountInterestConfig(models.Model):
    _name = 'account.interest.config'

    name = fields.Char('Name', required=True, readonly=True)
    ''' Interest '''
    interest_rate_year = fields.Float('Tasa de interés anual(%)', digits=(3,6), digits_compute=dp.get_precision('Interest'), required=True, help="Tasa de interés anual(%)")
    interest_rate = fields.Float('Tasa de interés calculado(%)', digits=(3,6), digits_compute=dp.get_precision('Interest'), required=True, help="Tasa de interés diario(%)")
    comment = fields.Text('Comment', help="Información adicional")
    active =  fields.Boolean('active',default=True)
    ''' Invoice '''
    invoice_journal_id = fields.Many2one('account.journal', string='Journal', required=True, domain="[('type', '=', 'sale')]", help="Diario que utilizara para la facturación de interés.")
    invoice_account_id = fields.Many2one('account.account', string='Account', required=True, domain="[('type', '=', 'receivable')]")
    ''' Line '''
    line_account_id = fields.Many2one('account.account', string='Account', required=True, domain=[('type', '=', 'other')])
    line_tax_id = fields.Many2one('account.tax', string='Tax', domain=[('type_tax_use', '=', 'sale')])
    ''' Bloquear pagos '''
    lock_move_line =  fields.Boolean('Bloquear la factura',default=True, help="Bloquear la factura cuando existan interés a pagar.")


    @api.model
    def create_default_interest_config(self):
        decimal_precision = self.env['decimal.precision'].precision_get('Interest')

        interest = {
            'name': 'INTERÉS POR MORA',
            'interest_rate_year': round(48.66, decimal_precision),
            'interest_rate': round((48.66 / 365), decimal_precision),
            'comment':  'Configuración de interés por mora \n'
                        'Calculo:\n'
                        '       Tasa de interés por día = (Tasa de interés anual(%) / 365(cantidad de días del año))',
            'invoice_journal_id': 1,
            'invoice_account_id': 16,
            'line_account_id': 113,
            'line_tax_id': 1
        }

        interesConfig = self.env['account.interest.config'].search([('name', '=', interest['name'])])

        if (not interesConfig):
            interesConfig.create(interest)

    @api.one
    @api.onchange('interest_rate_year','interest_rate')
    def calculate_interest(self):
        decimal_precision = self.env['decimal.precision'].precision_get('Interest')
        self.interest_rate = round((self.interest_rate_year / 365), decimal_precision)