Error in view permission with custom model form field

[Jones]

• Set permission to user with only view to model
• Create field in form class
• Go to django admin view un object created

class ModelAForm(forms.ModelForm):

    class Meta:
        model = ModelA
        fields = '__all__'

    form_field = forms.BooleanField(
        label="Form Field",
        required=False,
        widget=forms.CheckboxInput()
    )


class ModelA(models.Model):
    test = models.IntegerField(
        null=True,
        blank=True
    )

@admin.register(ModelA)
class ModelAAdmin(admin.ModelAdmin):

    form = TestForm

    fieldsets = (
        ('Test', {
            'fields': (
                'test', 'form_field'
            )
        }),
    )