教程讲解

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relfield_style ='fk-ajax'

当有外键指向他，会以ajax方式加载

数据量过大时很有用

实际情况

我的环境是python3.6+Django2.0.7+xadmin

除了过滤器中加入的字段有效果，在表单录入界面并没有什么用

这个问题的原因是Django2中ForeignKey和Django1不一样造成的

解决办法

修改 xadmin/views/edit.py

# if hasattr(db_field, "rel") and db_field.rel:
if hasattr(db_field, "rel") and db_field.rel:
            related_modeladmin = self.admin_site._registry.get(db_field.rel.to)

改为

# if hasattr(db_field, "rel") and db_field.rel:
        if hasattr(db_field, "remote_field") and db_field.remote_field:
            related_modeladmin = self.admin_site._registry.get(db_field.remote_field.model)

修改 xadmin/plugins/relfield.py

    def label_for_value(self, value):
        key = self.rel.get_related_field().name
        try:
            obj = self.rel.to._default_manager.using(
                self.db).get(**{key: value})
            return '%s' % escape(Truncator(obj).words(14, truncate='...'))
        except (ValueError, self.rel.to.DoesNotExist):
...
...
    def get_field_style(self, attrs, db_field, style, **kwargs):
        # search able fk field
        if style in ('fk-ajax', 'fk-select') and isinstance(db_field, models.ForeignKey):
            if (db_field.remote_field.to in self.admin_view.admin_site._registry) and \
                    self.has_model_perm(db_field.remote_field.to, 'view'):
                db = kwargs.get('using')
                return dict(attrs or {},
                            widget=(style == 'fk-ajax' and ForeignKeySearchWidget or ForeignKeySelectWidget)(db_field.remote_field, self.admin_view, using=db))

改为

    def label_for_value(self, value):
        key = self.rel.get_related_field().name
        try:
            # obj = self.rel.to._default_manager.using(
            obj = self.rel.model._default_manager.using(
                self.db).get(**{key: value})
            return '%s' % escape(Truncator(obj).words(14, truncate='...'))
        except (ValueError, self.rel.model.DoesNotExist):
...
...
    def get_field_style(self, attrs, db_field, style, **kwargs):
        # search able fk field
        if style in ('fk-ajax', 'fk-select') and isinstance(db_field, models.ForeignKey):
            if (db_field.remote_field.model in self.admin_view.admin_site._registry) and \
                    self.has_model_perm(db_field.remote_field.model, 'view'):
                db = kwargs.get('using')
                return dict(attrs or {},
                            widget=(style == 'fk-ajax' and ForeignKeySearchWidget or ForeignKeySelectWidget)(db_field.remote_field, self.admin_view, using=db))