python - 如何访问 __init__ 方法中的 django 表单值以进行查询

Question

我有一个包含外键的模型:

class Part(models.Model):
    partType = models.ForeignKey(PartType, on_delete=models.CASCADE)
    brand = models.ForeignKey(Brand, on_delete=models.CASCADE)
    part_name = models.CharField(max_length=60)

class QuotePart(models.Model):
    quote = models.ForeignKey(Quote, on_delete=models.CASCADE)
    line = models.PositiveSmallIntegerField(default=1)
    partType = models.ForeignKey(PartType, on_delete=models.CASCADE)
    # part can be None if the part has not been selected
    part = models.ForeignKey(Part, on_delete=models.CASCADE,blank=True,null=True)

我有一个允许将零件添加到报价单的表格，我想将表格上的选择限制为正确 PartType 的零件，但我的代码不起作用:

    class QuoteBikePartForm(ModelForm):
    def __init__(self, *args, **kwargs):
        super(QuoteBikePartForm, self).__init__(*args, **kwargs)
        self.fields['partType'].widget.attrs['disabled'] = True
        self.fields['frame_part'].widget.attrs['disabled'] = True
        partType = kwargs.pop('partType')
        self.fields['part'].queryset = Part.objects.filter(partType=partType.pk)

    class Meta:
        model = QuotePart
        fields = ['quote','line','partType','frame_part', 'part', 'quantity','cost_price', 'sell_price']

QuoteBikePartFormSet = inlineformset_factory(Quote, QuotePart, form=QuoteBikePartForm)

我已经尝试了很多不同的事情，但到目前为止都没有运气。

Answer 1

您可以使用“self.instance.key_name”来访问该值。