odoo16/odoo/utils/model_util/related_field.py

# -*- coding: utf-8 -*-

from .const import get_join


class RelatedField:
    # 举例：
    # customer_name = fields.Char(string='客户', related='customer_id.name')
    # 则：
    # for field, info in self._fields.items():
    #       info.related:            ('customer','name')
    #       info.related_field:     'archives.customer.name'
    #       info.depends:           ('customer_id.name',)
    def __init__(self, left_alias, related_info):
        self._left_alias = left_alias
        self._related_info = related_info
        self._related_field, self._related_model_field = RelatedField._get_related_info(related_info)
        self._related_model = None
        return

    def __str__(self):
        _f = '<RelatedField== left alias:{}, related model:{},related field:{},related model field:{}>'
        return _f.format(self._left_alias, self._related_model, self._related_field, self._related_model_field)

    def get_related_field(self):
        return self._related_field

    def get_field_in_related_model(self):
        return self._related_model_field

    def set_related_model(self, related_model):
        self._related_model = related_model
        return

    def get_related_alias(self):
        return self._related_model.get_alias()

    def get_join(self):
        return get_join(self._left_alias, self._related_field, self._related_model.get_table(),
                        self._related_model.get_alias(), 'id')

    def get_selected_field(self):
        return '{}.{}'.format(self._related_model.get_alias(), self._related_model_field)

    @staticmethod
    def _get_related_info(related_field):
        # print('_get_related_info, related_field:', related_field)
        if not related_field:
            return '', ''
        pair = related_field.split('.')
        if len(pair) == 2:
            return pair
        return '', ''