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)
这基本上就是我定义内联表单的方式,因此它有两个额外的字段 - matcher
是相关表中的标准字段,内联表单会自动处理它。我通过覆盖 MyCustomInlineForm
中的 save()
将额外的参数值保存在不同的存储中。
但如果我编辑现有记录 - 匹配器值显示正确,但我显然还想用相应的值预加载 param0 和 param1。我可以在哪里连接来做到这一点?
最佳答案
我自己设法做到了。我还设法简化了定义自定义额外字段的方式,而无需覆盖 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 - 可以通过覆盖 forms.ModelForm
类的 is_valid()
方法并通过 self.add_error() 添加错误来验证自定义参数
。我希望它对某人有所帮助。
关于python - 在 Django 内联模型管理中,如何用值预填充额外的字段,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/35701930/