def test_render(self):
        """
        Check that the inline panel renders the panels set on the model
        when no 'panels' parameter is passed in the InlinePanel definition
        """
        SpeakerObjectList = ObjectList([InlinePanel('speakers', label="Speakers")]).bind_to_model(EventPage)
        SpeakerInlinePanel = SpeakerObjectList.children[0]
        EventPageForm = SpeakerObjectList.get_form_class(EventPage)

        # SpeakerInlinePanel should instruct the form class to include a 'speakers' formset
        self.assertEqual(['speakers'], list(EventPageForm.formsets.keys()))

        event_page = EventPage.objects.get(slug='christmas')

        form = EventPageForm(instance=event_page)
        panel = SpeakerInlinePanel(instance=event_page, form=form)

        result = panel.render_as_field()

        self.assertIn('<label for="id_speakers-0-first_name">Name:</label>', result)
        self.assertIn('value="Father"', result)
        self.assertIn('<label for="id_speakers-0-last_name">Surname:</label>', result)
        self.assertIn('<label for="id_speakers-0-image">Image:</label>', result)
        self.assertIn('Choose an image', result)

        # rendered panel must also contain hidden fields for id, DELETE and ORDER
        self.assertIn('<input id="id_speakers-0-id" name="speakers-0-id" type="hidden"', result)
        self.assertIn('<input id="id_speakers-0-DELETE" name="speakers-0-DELETE" type="hidden"', result)
        self.assertIn('<input id="id_speakers-0-ORDER" name="speakers-0-ORDER" type="hidden"', result)

        # rendered panel must contain maintenance form for the formset
        self.assertIn('<input id="id_speakers-TOTAL_FORMS" name="speakers-TOTAL_FORMS" type="hidden"', result)

        # render_js_init must provide the JS initializer
        self.assertIn('var panel = InlinePanel({', panel.render_js_init())

    def test_is_multipart(self):
        """
        Check whether is_multipart returns True when an InlinePanel contains
        a FileInput and False otherwise
        """
        SpeakerObjectList = ObjectList([
            InlinePanel('speakers', label="Speakers", panels=[
                FieldPanel('first_name', widget=forms.FileInput),
            ]),
        ]).bind_to_model(EventPage)
        SpeakerInlinePanel = SpeakerObjectList.children[0]
        EventPageForm = SpeakerObjectList.get_form_class(EventPage)

        event_page = EventPage.objects.get(slug='christmas')
        form = EventPageForm(instance=event_page)
        panel = SpeakerInlinePanel(instance=event_page, form=form)

        self.assertTrue(panel.is_multipart())

        SpeakerObjectList = ObjectList([
            InlinePanel('speakers', label="Speakers", panels=[
                FieldPanel('first_name', widget=forms.Textarea),
            ]),
        ]).bind_to_model(EventPage)
        SpeakerInlinePanel = SpeakerObjectList.children[0]
        EventPageForm = SpeakerObjectList.get_form_class(EventPage)

        event_page = EventPage.objects.get(slug='christmas')
        form = EventPageForm(instance=event_page)
        panel = SpeakerInlinePanel(instance=event_page, form=form)

        self.assertFalse(panel.is_multipart())

 def get_edit_handler_class(self):
     if hasattr(self.model, 'edit_handler'):
         edit_handler = self.model.edit_handler
     else:
         panels = extract_panel_definitions_from_model_class(self.model)
         edit_handler = ObjectList(panels)
     return edit_handler.bind_to_model(self.model)

 def get_edit_handler_class(self):
     if hasattr(self.model, 'edit_handler'):
         edit_handler = self.model.edit_handler
     else:
         fields_to_exclude = self.model_admin.get_form_fields_exclude(request=self.request)
         panels = extract_panel_definitions_from_model_class(self.model, exclude=fields_to_exclude)
         edit_handler = ObjectList(panels)
     return edit_handler.bind_to_model(self.model)

    def test_render_with_panel_overrides(self):
        """
        Check that inline panel renders the panels listed in the InlinePanel definition
        where one is specified
        """
        SpeakerObjectList = ObjectList([
            InlinePanel('speakers', label="Speakers", panels=[
                FieldPanel('first_name', widget=forms.Textarea),
                ImageChooserPanel('image'),
            ]),
        ]).bind_to_model(EventPage)
        SpeakerInlinePanel = SpeakerObjectList.children[0]
        EventPageForm = SpeakerObjectList.get_form_class(EventPage)

        # SpeakerInlinePanel should instruct the form class to include a 'speakers' formset
        self.assertEqual(['speakers'], list(EventPageForm.formsets.keys()))

        event_page = EventPage.objects.get(slug='christmas')

        form = EventPageForm(instance=event_page)
        panel = SpeakerInlinePanel(instance=event_page, form=form)

        result = panel.render_as_field()

        # rendered panel should contain first_name rendered as a text area, but no last_name field
        self.assertIn('<label for="id_speakers-0-first_name">Name:</label>', result)
        self.assertIn('Father</textarea>', result)
        self.assertNotIn('<label for="id_speakers-0-last_name">Surname:</label>', result)

        # test for #338: surname field should not be rendered as a 'stray' label-less field
        self.assertTagInHTML('<input id="id_speakers-0-last_name">', result, count=0, allow_extra_attrs=True)

        self.assertIn('<label for="id_speakers-0-image">Image:</label>', result)
        self.assertIn('Choose an image', result)

        # rendered panel must also contain hidden fields for id, DELETE and ORDER
        self.assertTagInHTML(
            '<input id="id_speakers-0-id" name="speakers-0-id" type="hidden">',
            result, allow_extra_attrs=True
        )
        self.assertTagInHTML(
            '<input id="id_speakers-0-DELETE" name="speakers-0-DELETE" type="hidden">',
            result, allow_extra_attrs=True
        )
        self.assertTagInHTML(
            '<input id="id_speakers-0-ORDER" name="speakers-0-ORDER" type="hidden">',
            result, allow_extra_attrs=True
        )

        # rendered panel must contain maintenance form for the formset
        self.assertTagInHTML(
            '<input id="id_speakers-TOTAL_FORMS" name="speakers-TOTAL_FORMS" type="hidden">',
            result, allow_extra_attrs=True
        )

        # render_js_init must provide the JS initializer
        self.assertIn('var panel = InlinePanel({', panel.render_js_init())

def get_snippet_edit_handler(model):
    if model not in SNIPPET_EDIT_HANDLERS:
        if hasattr(model, 'edit_handler'):
            # use the edit handler specified on the page class
            edit_handler = model.edit_handler
        else:
            panels = extract_panel_definitions_from_model_class(model)
            edit_handler = ObjectList(panels)

        SNIPPET_EDIT_HANDLERS[model] = edit_handler.bind_to_model(model)

    return SNIPPET_EDIT_HANDLERS[model]

    def test_autodetect_page_type(self):
        # Model has a foreign key to EventPage, which we want to autodetect
        # instead of specifying the page type in PageChooserPanel
        MyPageObjectList = ObjectList([PageChooserPanel('page')]).bind_to_model(EventPageChooserModel)
        MyPageChooserPanel = MyPageObjectList.children[0]
        PageChooserForm = MyPageObjectList.get_form_class(EventPageChooserModel)
        form = PageChooserForm(instance=self.test_instance)
        page_chooser_panel = MyPageChooserPanel(instance=self.test_instance, form=form)

        result = page_chooser_panel.render_as_field()
        expected_js = 'createPageChooser("{id}", ["{model}"], {parent}, false);'.format(
            id="id_page", model="tests.eventpage", parent=self.events_index_page.id)

        self.assertIn(expected_js, result)

    def test_override_page_type(self):
        # Model has a foreign key to Page, but we specify EventPage in the PageChooserPanel
        # to restrict the chooser to that page type
        MyPageObjectList = ObjectList([
            PageChooserPanel('page', 'tests.EventPage')
        ]).bind_to_model(EventPageChooserModel)
        MyPageChooserPanel = MyPageObjectList.children[0]
        PageChooserForm = MyPageObjectList.get_form_class(EventPageChooserModel)
        form = PageChooserForm(instance=self.test_instance)
        page_chooser_panel = MyPageChooserPanel(instance=self.test_instance, form=form)

        result = page_chooser_panel.render_as_field()
        expected_js = 'createPageChooser("{id}", ["{model}"], {parent}, false);'.format(
            id="id_page", model="tests.eventpage", parent=self.events_index_page.id)

        self.assertIn(expected_js, result)

 def setUp(self):
     # a custom ObjectList for EventPage
     self.EventPageObjectList = ObjectList([
         FieldPanel('title', widget=forms.Textarea),
         FieldPanel('date_from'),
         FieldPanel('date_to'),
         InlinePanel('speakers', label="Speakers"),
     ], heading='Event details', classname="shiny").bind_to_model(EventPage)

    def test_render_js_init_with_can_choose_root_true(self):
        # construct an alternative page chooser panel object, with can_choose_root=True

        MyPageObjectList = ObjectList([
            PageChooserPanel('page', can_choose_root=True)
        ]).bind_to_model(PageChooserModel)
        MyPageChooserPanel = MyPageObjectList.children[0]
        PageChooserForm = MyPageObjectList.get_form_class(EventPageChooserModel)

        form = PageChooserForm(instance=self.test_instance)
        page_chooser_panel = MyPageChooserPanel(instance=self.test_instance, form=form)
        result = page_chooser_panel.render_as_field()

        # the canChooseRoot flag on createPageChooser should now be true
        expected_js = 'createPageChooser("{id}", ["{model}"], {parent}, true);'.format(
            id="id_page", model="wagtailcore.page", parent=self.events_index_page.id)
        self.assertIn(expected_js, result)

class TestObjectList(TestCase):
    def setUp(self):
        # a custom ObjectList for EventPage
        self.EventPageObjectList = ObjectList([
            FieldPanel('title', widget=forms.Textarea),
            FieldPanel('date_from'),
            FieldPanel('date_to'),
            InlinePanel('speakers', label="Speakers"),
        ], heading='Event details', classname="shiny").bind_to_model(EventPage)

    def test_get_form_class(self):
        EventPageForm = self.EventPageObjectList.get_form_class(EventPage)
        form = EventPageForm()

        # form must include the 'speakers' formset required by the speakers InlinePanel
        self.assertIn('speakers', form.formsets)

        # form must respect any overridden widgets
        self.assertEqual(type(form.fields['title'].widget), forms.Textarea)

    def test_render(self):
        EventPageForm = self.EventPageObjectList.get_form_class(EventPage)
        event = EventPage(title='Abergavenny sheepdog trials')
        form = EventPageForm(instance=event)

        object_list = self.EventPageObjectList(
            instance=event,
            form=form
        )

        result = object_list.render()

        # result should contain ObjectList furniture
        self.assertIn('<ul class="objects">', result)

        # result should contain h2 headings (including labels) for children
        self.assertInHTML('<h2><label for="id_date_from">Start date</label></h2>', result)

        # result should include help text for children
        self.assertIn('<div class="object-help help">Not required if event is on a single day</div>', result)

        # result should contain rendered content from descendants
        self.assertIn('Abergavenny sheepdog trials</textarea>', result)

        # this result should not include fields that are not covered by the panel definition
        self.assertNotIn('signup_link', result)

    def test_no_thousand_separators_in_js(self):
        """
        Test that the USE_THOUSAND_SEPARATOR setting does not screw up the rendering of numbers
        (specifically maxForms=1000) in the JS initializer:
        https://github.com/torchbox/wagtail/pull/2699
        """
        SpeakerObjectList = ObjectList([
            InlinePanel('speakers', label="Speakers", panels=[
                FieldPanel('first_name', widget=forms.Textarea),
                ImageChooserPanel('image'),
            ]),
        ]).bind_to_model(EventPage)
        SpeakerInlinePanel = SpeakerObjectList.children[0]
        EventPageForm = SpeakerObjectList.get_form_class(EventPage)
        event_page = EventPage.objects.get(slug='christmas')
        form = EventPageForm(instance=event_page)
        panel = SpeakerInlinePanel(instance=event_page, form=form)

        self.assertIn('maxForms: 1000', panel.render_js_init())

    def setUp(self):
        model = PageChooserModel  # a model with a foreign key to Page which we want to render as a page chooser

        # a PageChooserPanel class that works on PageChooserModel's 'page' field
        self.EditHandler = ObjectList([PageChooserPanel('page')]).bind_to_model(PageChooserModel)
        self.MyPageChooserPanel = self.EditHandler.children[0]

        # build a form class containing the fields that MyPageChooserPanel wants
        self.PageChooserForm = self.EditHandler.get_form_class(PageChooserModel)

        # a test instance of PageChooserModel, pointing to the 'christmas' page
        self.christmas_page = Page.objects.get(slug='christmas')
        self.events_index_page = Page.objects.get(slug='events')
        self.test_instance = model.objects.create(page=self.christmas_page)

        self.form = self.PageChooserForm(instance=self.test_instance)
        self.page_chooser_panel = self.MyPageChooserPanel(instance=self.test_instance, form=self.form)

class TestPageChooserPanel(TestCase):
    fixtures = ['test.json']

    def setUp(self):
        model = PageChooserModel  # a model with a foreign key to Page which we want to render as a page chooser

        # a PageChooserPanel class that works on PageChooserModel's 'page' field
        self.EditHandler = ObjectList([PageChooserPanel('page')]).bind_to_model(PageChooserModel)
        self.MyPageChooserPanel = self.EditHandler.children[0]

        # build a form class containing the fields that MyPageChooserPanel wants
        self.PageChooserForm = self.EditHandler.get_form_class(PageChooserModel)

        # a test instance of PageChooserModel, pointing to the 'christmas' page
        self.christmas_page = Page.objects.get(slug='christmas')
        self.events_index_page = Page.objects.get(slug='events')
        self.test_instance = model.objects.create(page=self.christmas_page)

        self.form = self.PageChooserForm(instance=self.test_instance)
        self.page_chooser_panel = self.MyPageChooserPanel(instance=self.test_instance, form=self.form)

    def test_page_chooser_uses_correct_widget(self):
        self.assertEqual(type(self.form.fields['page'].widget), AdminPageChooser)

    def test_render_js_init(self):
        result = self.page_chooser_panel.render_as_field()
        expected_js = 'createPageChooser("{id}", ["{model}"], {parent}, false);'.format(
            id="id_page", model="wagtailcore.page", parent=self.events_index_page.id)

        self.assertIn(expected_js, result)

    def test_render_js_init_with_can_choose_root_true(self):
        # construct an alternative page chooser panel object, with can_choose_root=True

        MyPageObjectList = ObjectList([
            PageChooserPanel('page', can_choose_root=True)
        ]).bind_to_model(PageChooserModel)
        MyPageChooserPanel = MyPageObjectList.children[0]
        PageChooserForm = MyPageObjectList.get_form_class(EventPageChooserModel)

        form = PageChooserForm(instance=self.test_instance)
        page_chooser_panel = MyPageChooserPanel(instance=self.test_instance, form=form)
        result = page_chooser_panel.render_as_field()

        # the canChooseRoot flag on createPageChooser should now be true
        expected_js = 'createPageChooser("{id}", ["{model}"], {parent}, true);'.format(
            id="id_page", model="wagtailcore.page", parent=self.events_index_page.id)
        self.assertIn(expected_js, result)

    def test_get_chosen_item(self):
        result = self.page_chooser_panel.get_chosen_item()
        self.assertEqual(result, self.christmas_page)

    def test_render_as_field(self):
        result = self.page_chooser_panel.render_as_field()
        self.assertIn('<p class="help">help text</p>', result)
        self.assertIn('<span class="title">Christmas</span>', result)
        self.assertIn(
            '<a href="/admin/pages/%d/edit/" class="edit-link button button-small button-secondary" target="_blank">'
            'Edit this page</a>' % self.christmas_page.id,
            result)

    def test_render_as_empty_field(self):
        test_instance = PageChooserModel()
        form = self.PageChooserForm(instance=test_instance)
        page_chooser_panel = self.MyPageChooserPanel(instance=test_instance, form=form)
        result = page_chooser_panel.render_as_field()

        self.assertIn('<p class="help">help text</p>', result)
        self.assertIn('<span class="title"></span>', result)
        self.assertIn('Choose a page', result)

    def test_render_error(self):
        form = self.PageChooserForm({'page': ''}, instance=self.test_instance)
        self.assertFalse(form.is_valid())

        page_chooser_panel = self.MyPageChooserPanel(instance=self.test_instance, form=form)
        self.assertIn('<span>This field is required.</span>', page_chooser_panel.render_as_field())

    def test_override_page_type(self):
        # Model has a foreign key to Page, but we specify EventPage in the PageChooserPanel
        # to restrict the chooser to that page type
        MyPageObjectList = ObjectList([
            PageChooserPanel('page', 'tests.EventPage')
        ]).bind_to_model(EventPageChooserModel)
        MyPageChooserPanel = MyPageObjectList.children[0]
        PageChooserForm = MyPageObjectList.get_form_class(EventPageChooserModel)
        form = PageChooserForm(instance=self.test_instance)
        page_chooser_panel = MyPageChooserPanel(instance=self.test_instance, form=form)

        result = page_chooser_panel.render_as_field()
        expected_js = 'createPageChooser("{id}", ["{model}"], {parent}, false);'.format(
            id="id_page", model="tests.eventpage", parent=self.events_index_page.id)

        self.assertIn(expected_js, result)

    def test_autodetect_page_type(self):
        # Model has a foreign key to EventPage, which we want to autodetect
        # instead of specifying the page type in PageChooserPanel
        MyPageObjectList = ObjectList([PageChooserPanel('page')]).bind_to_model(EventPageChooserModel)
#.........这里部分代码省略.........

 def edit_handler_class(self, model):
     """A GenericModelChooserPanel class that works on
     PageChooserModel's 'page' field
     """
     object_list = ObjectList([GenericModelChooserPanel('page')])
     return object_list.bind_to_model(model)