set initial value for field when a model insert page loaded in django admin

[sjsade...@gmail.com]

hi, i want set initial value for field when a model insert page loaded in django admin.
i think i can do this work with get_field_queryset method but in django there is no toturial for get_field_queryset.
how to do this work?
thanks ...

[Derek]

I have cut and trimmed this from of some of my own code, so may not be 100%:

class MyModelForm(ModelForm):

    class Meta:

        model = MyModel

    def __init__(self, *args, **kwargs):

        super(MyModelForm, self).__init__(*args, **kwargs)

        self.fields['my_field'].initial= 'some_value'

class MyModelAdmin(ModelAdmin):

    form = MyModelForm