I have inline, which shows data of contenttype model, so instead of real 
objects, I see content_type and object_id fields. I can exclude these 
fields - this is not a problem, but also I want to get real current object 
as selected with other Places in a dropdown list. Could anyone tell me, how 
can I do this?


class Criterias(models.Model):
    name = ...
class Places(models.Model):
    name = ...
class PlacesToCriterias(models.Model):
    content_type = models.ForeignKey(ContentType, on_delete=models.CASCADE)
    object_id = models.PositiveIntegerField()
    content_object = GenericForeignKey()

    criteria_group = models.ForeignKey(Criterias)


class CriteriaPlacesInlineAdmin(admin.TabularInline):
    model = PlacesToCriterias
class CriteriasAdmin(admin.ModelAdmin):
    inlines = [CriteriaPlacesInlineAdmin]

admin.site.register(Criterias, CriteriasAdmin)

I can add to CriteriaPlacesInlineAdmin a form, something like:

class CriteriaPlacesChoicesFieldForm(forms.ModelForm):
    places = forms.ModelChoiceField(PlaceTypesGroups.objects.all(), 

but how can I pass\add object_id to this form\query in order to get 
'selected' place in the dropdown list?

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