Get a :class:`Page <pages.admin.forms.PageForm>` for the
        :class:`Page <pages.models.Page>` and modify its fields depending on
        the request.

def get_form(self, request, obj=None, **kwargs):
        """Get a :class:`Page <pages.admin.forms.PageForm>` for the
        :class:`Page <pages.models.Page>` and modify its fields depending on
        the request."""
        #form = super(PageAdmin, self).get_form(request, obj, **kwargs)
        template = get_template_from_request(request, obj)
        form = make_form(self.model, get_placeholders(template))

        language = get_language_from_request(request)
        form.base_fields['language'].initial = language
        if obj:
            initial_slug = obj.slug(language=language, fallback=False)
            initial_title = obj.title(language=language, fallback=False)
            form.base_fields['slug'].initial = initial_slug
            form.base_fields['title'].initial = initial_title
            form.base_fields['slug'].label = _('Slug')

        template = get_template_from_request(request, obj)
        page_templates = settings.get_page_templates()
        if len(page_templates) > 0:
            template_choices = list(page_templates)
            template_choices.insert(0, (settings.PAGE_DEFAULT_TEMPLATE,
                    _('Default template')))
            form.base_fields['template'].choices = template_choices
            form.base_fields['template'].initial = force_text(template)

        for placeholder in get_placeholders(template):
            name = placeholder.name
            if obj:
                initial = placeholder.get_content(obj, language, name)
            else:
                initial = None
            form.base_fields[name] = placeholder.get_field(obj,
                language, initial=initial)

        for placeholder in self.metadata_fields:
            name = placeholder['name']
            initial = None
            if obj:
                try:
                    initial = Content.objects.get(page=obj, language=language, type=name).body
                except Content.DoesNotExist:
                    pass
            form.base_fields[name] = placeholder['field']
            form.base_fields[name].initial = initial

        return form