Django抑制异常？

Question

难以找到不端行为。经过几个小时后，看起来Django看起来像是AttributeError，可能还有其他例外：

from django import forms

class MyBaseForm(forms.ModelForm):
    class Meta:
        model = MyModel
        fields = ('field1', 'field2', )
    …

class MyForm(MyBaseForm):
    def clean_field1(self):
        super(MyForm, self).clean_field1()   # calling non-exitsting method
        # instead of AttributeError exception being raised,
        # following code is not executed without a warning
        return self.another_field_handler('field1')

有人可以解释这种令人惊讶的行为对Django表格是否正常吗？一些链接在哪里记录？