class LectureForm(forms.ModelForm):
    lecture_title = forms.CharField(max_length=100, required=True)
    course = forms.ModelChoiceField(initial=Course.objects.first(), queryset=Course.objects.filter(
        Q(teacher1__surname__in=[t.surname for t in TeacherData.objects.filter(
            Q(teacher_ID__iexact=[x.teacher_ID for x in Teacher.objects.all()]))])))

    class Meta:
        model = Lecture
        fields = ('course', 'lecture_category', 'lecture_title', 'content')