在django內聯模型管理員中，如何使用值預填充額外字段

Question

class MyCustomInline(admin.TabularInline):
    min_num = 1
    extra = 0
    fields = ['matcher', 'param0', 'param1']
    model = MyModel
    form = MyCustomInlineForm

   def get_formset(self, request, obj=None, **kwargs):
        extra_fields = {
            'param0': forms.CharField(label='First Param', required=False),
            'param1': forms.CharField(label='Second Param', required=False)
        }
        kwargs['form'] = type('MyCustomInline', (MyCustomInlineForm,), extra_fields)
        return super(MyCustomInline, self).get_formset(request, obj, **kwargs)

這基本上是我如何定義我的內聯表單，以便它有兩個額外的字段 - matcher是相關表中的標准字段，內聯表單自動處理它。 我通過覆蓋MyCustomInlineForm的save()將額外的param值保存在不同的存儲中。

但是如果我編輯現有記錄 - 匹配器值正確顯示但我顯然也想用相應的值預加載param0和param1。 我可以在哪里聯系呢？

Answer 1

我設法自己做了。 我還設法簡化了我定義自定義額外字段的方式，而沒有覆蓋get_formset方法：

class MyCustomInlineForm(forms.ModelForm):
    matcher = forms.ChoiceField(choices=[(v['name'], v['name']) for v in matchers], label='Matcher')
    param0 = forms.CharField(label='First Param', required=False)
    param1 = forms.CharField(label='Second Param', required=False)

    def __init__(self, *args, **kwargs):
        super(MyCustomInlineForm, self).__init__(*args, **kwargs)
        if self.instance.pk:
            """ self.instance is the model for the current row.
                If there is a pk property that is not None, it means it's not
                a new, empty inline model but we are working with existing one."""
            self.initial['param0'], self.initial['param1'] = custom_way_to_load_params(self.instance)

    def save(self, commit=True):
        model = super(MyCustomInlineForm, self).save(True)
        param0 = self.cleaned_data['param0']
        param1 = self.cleaned_data['param1']
        custom_way_to_save_params(model, param0, param1)
        return model



class MyCustomInline(admin.TabularInline):
    min_num = 1
    extra = 0
    fields = ['matcher', 'param0', 'param1']
    model = MyModel
    form = MyCustomInlineForm

如果需要 - 可以通過覆蓋forms.ModelForm類的is_valid()方法並通過self.add_error()添加錯誤來完成自定義參數的驗證。 我希望它對某人有幫助。