categories_string = fields.Function(fields.Char('Categories'
#, order_field='aikidokas.get_categories_string %(order)s, aikidokas.name %(order)s'
), 'get_categories_string', searcher='search_categories_string')

    def get_categories_string(self, ids, name):
        if not ids:
            return []
        res = {}
        for party in self.browse(ids):
            res[party.id] = ', '.join(sorted(cat.rec_name for cat in party.categories))
            if 'Fukushidoin, ' in res[party.id]:
                res[party.id] = res[party.id].replace('Fukushidoin, ', '') + ', Fukushidoin'
            if 'Shidoin, ' in res[party.id]:
                res[party.id] = res[party.id].replace('Shidoin, ', '') + ', Shidoin'
            if 'Dojocho, ' in res[party.id]:
                res[party.id] = res[party.id].replace('Dojocho, ', '') + ', Dojocho'
            if ', Dojo' == res[party.id][-6:]:
                res[party.id] = 'Dojo, ' + res[party.id][:len(res[party.id])-6]
        return res

    def search_categories_string(self, name, clause):
        ids = self.search([('name', '!=', '')], order=[])
        res = []
        value = clause[2]
        cats = self.get_categories_string(ids, name)
        for cat in cats.keys():
            if value.lower() in cats[cat].lower():
                res.append('categories', '=', cats[cat])
        res.append(('categories', clause[1], value))
        return res