inlineformset_factory

ERROR:
AttributeError at /settings/programarank/new
'ProgramaRankNew' object has no attribute 'object'
Request Method:	POST
Request URL:	http://127.0.0.1:8000/settings/programarank/new
Django Version:	2.2.9
Exception Type:	AttributeError
Exception Value:
'ProgramaRankNew' object has no attribute 'object'
Exception Location:	E:\curso\python\MAE\lib\site-packages\django\views\generic\detail.py in get_context_data, line 94
Python Executable:	E:\curso\python\MAE\Scripts\python.exe
Python Version:	3.8.1
Python Path:
['E:\\curso\\python\\MAE',
 'C:\\Program Files (x86)\\Python38-32\\python38.zip',
 'C:\\Program Files (x86)\\Python38-32\\DLLs',
 'C:\\Program Files (x86)\\Python38-32\\lib',
 'C:\\Program Files (x86)\\Python38-32',
 'E:\\curso\\python\\MAE',
 'E:\\curso\\python\\MAE\\lib\\site-packages']
Server time:	Mié, 5 Feb 2020 09:14:26 -0600

MODELS:
class Rank(ClaseModelo):
    codigo = models.CharField(
        max_length=5,
        help_text='Rank Codigo',
        unique=True
    )
    descripcion = models.CharField(
        max_length=50,
        help_text='Descripcion del Rango',
        unique=True
    )
    color = RGBColorField(colors=['#FFFFFF','#FBB403','#FBF703','#0D6006','#0CC70C','#B005F5','#000291','#626163','#FF0110','#000000'],default='#FFFFFF')

    def __str__(self):
        return '{} - {}'.format(self.codigo, self.descripcion)


    def save(self):
        self.codigo= self.codigo.upper()
        self.descripcion=self.descripcion.upper()
        self.color = self.color.upper()
        super(Rank,self).save()

    class Meta:
        verbose_name_plural="Ranks"


class ProgramaRank(models.Model):
    programa = models.ForeignKey(Programa, on_delete=models.CASCADE)
    rangoactual = models.ForeignKey(Rank, related_name="rangoactual", on_delete=models.CASCADE)
    rangonuevo = models.ForeignKey(Rank, related_name='rangonuevo', on_delete=models.CASCADE)

class Programa(ClaseModelo):
    descripcion = models.CharField(
        max_length=50,
        help_text='Descripcion de Programa',
        unique=True
    )

    def __str__(self):
        return '{}'.format(self.descripcion)

    def save(self):
        self.descripcion = self.descripcion.upper()
        super(Programa, self).save()

    class Meta:
        verbose_name_plural="Programas"



VIEWS:
class ProgramaRankNew(SuccessMessageMixin, SinPrivilegios, generic.CreateView):
    permission_required = "settings.add_programarank"
    model = Programa
    template_name = "settings/programarank_form.html"
    form_class = ProgramaRankEncForm
    success_url = reverse_lazy('settings:programarank_list')

    def get(self, request, *args, **kwargs):
        self.object = None
        form_class = self.get_form_class()
        form = self.get_form(form_class)
        detalle_programa = DetallesProgramaFormSet()
        return self.render_to_response(
            self.get_context_data(form = form, detalle_programa = detalle_programa)
        )

    def post(self, request, *args, **kwargs):
        form_class = self.get_form_class()
        form = self.get_form(form_class)
        detalle_programa = DetallesProgramaFormSet(self.request.POST)

        if form.is_valid() and detalle_programa.is_valid():
            return self.form_valid(form, detalle_programa)
        else:
            return self.form_invalid(form, detalle_programa)

    def form_valid(self, form, detalle_programa):
        self.object = form.save()
        detalle_programa.instance = self.object
        detalle_programa.save()
        return HttpResponseRedirect(self.success_url)

    def form_invalid(self, form, detalle_programa):
        return self.render_to_response(
            self.get_context_data(form = form, detalle_programa = detalle_programa)
        )


FORMS
class ProgramaRankEncForm(forms.ModelForm):
    descripcion = forms.ModelChoiceField(queryset=Programa.objects.filter(activo=True).order_by("descripcion"), empty_label="Seleccione el Programa")

    class Meta:
        model = Programa
        fields = ['descripcion']

    def __init__(self,*args, **kwargs):
        super().__init__(*args,**kwargs)
        for field in iter(self.fields):
            self.fields[field].widget.attrs.update({'class':'form-control'})


class ProgramaRankDetForm(forms.ModelForm):
    rangoactual = forms.ModelChoiceField(queryset = Rank.objects.filter(activo=True).order_by("id"),empty_label="Seleccione Rango")
    rangonuevo = forms.ModelChoiceField(queryset = Rank.objects.filter(activo=True).order_by("id"),empty_label="Seleccione Rango")

    class Meta:
        model = ProgramaRank
        fields = ['rangoactual','rangonuevo']

    def __init__(self, *args, **kwargs):
        super().__init__(*args,**kwargs)
        for field in iter(self.fields):
            self.fields[field].widget.attrs.update({'class':'form-control'})


DetallesProgramaFormSet = inlineformset_factory(Programa, ProgramaRank, form=ProgramaRankDetForm, extra=10)



TEMPLATE:
{% extends 'base/base.html' %}
{% block content%}
    {% if form.errors %}
        {% for field in form %}
            {% if field.errors %}
                <div class="alert alert-danger fade in">
                    <a href="#" class="close" data-dismiss="alert" aria-label="close">&times;</a>
                    {% for error in field.errors %}
                        <strong>{{ error|escape }}</strong>
                    {% endfor %}
                </div>
            {% endif %}
        {% endfor %}
        {% if form.non_field_errors%}
            <div class="alert alert-danger">
                <a href="#" class="close" data-dismiss="alert" aria-label="close">&times;</a>
                {% for error in form.non_field_errors %}

                    <strong>{{ error|escape }}</strong>
                {% endfor %}
            </div>
        {% endif %}
    {% endif %}

    {% if object %}
        <form method="POST" action="{% url 'settings:programarank_edit' object.pk %}" class="empty-form">
    {% else %}
        <form method="POST" action="{% url 'settings:programarank_new' %}">
    {% endif %}

<div class="card mb-4 py-3 border-left-primary">
    <h2 class="m-2 font-weight-bold text-primary"> {% if object %} Editar {% else %} Nueva {% endif %} Estructura de Rangos</h2></h2>
    <div class="card-body">
        {% csrf_token %}
        <div class="col">
            <div class="form-group ">
                    {{ form.descripcion }}
                <small class="text-danger">{{form.errors.descripcion}}</small>
            </div>
        </div>
        {{ detalle_factura.management_form }}

        <table width="100%" class="table table-bordered" id="dataTables-example" cellspacing="0">
            <thead>
            <td class="text-center">Rango Actual</td>
            <td class="text-center">Rango Nuevo</td>
            <td class="text-center">Borrar</td>
            </thead>
            <tbody>
            {% for detalle in detalle_programa %}
                <tr>
                    <td>{{ detalle.rangoactual }}
                    {% if detalle.rangoactual.errors %}
                            {% for error in detalle.rangoactual.errors %}
                                <small class="text-danger">{{ error|escape }} </small>
                            {% endfor %}
                        {% endif %}</td>
                    <td> {{ detalle.rangonuevo }}
                        {% if detalle.rangonuevo.errors %}
                            {% for error in detalle.rangonuevo.errors %}
                                <small class="text-danger">{{ error|escape }} </small>
                            {% endfor %}
                        {% endif %}
                    </td>
                    <td>{{  detalle.DELETE }}</td>
                </tr>
            {% endfor %}
            </tbody>
        </table>
    </div>

        <div class="text-center">
            <button type="submit" class="btn btn-success" name="submit"><span class="fa fa-save"></span> Guardar</button>
            <a class="btn btn-danger" href="{% url 'settings:programarank_list' %}"><span class="fa fa-undo"></span> Cancelar</a>
        </div>

</div>

</form>
{% endblock content %}