How to use ModelChoiceField? I whould like to filter the output from a field form.

I have some models classes. And some classes have bounding fields with another class. Each class have the field - author. I whould like that for each user the form bounding field shows only those data which was created these authors.

For example:
class "TypeJob" has field "author".
User Jhon created a TypJob - "Painting".
User Alex created a TypJob - "Cleaning".
Class "Order" has bounding field - "name_typ_job"
When Jhon whould like create an order, he opens the form and click "name type job" field, he sees both type job: painting and cleaning.
I whould like that he sees and could choose only "painting". Because he is it author.

I wrote that

class OrderTestForm(forms.ModelForm):      class Meta:          model = Order      name_job = forms.ModelChoiceField(queryset=None)      qs = TypJob.objects.filter(author__id=user.id)      def __init__(self, *args, **kwargs):          super().__init__(*args, **kwargs)          self.fields['name_job'].queryset = qs  

But I have

name 'user' is not defined

name 'author__id' is not defined

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