class AuthorPage(Page):
    author = models.ForeignKey("authors.Author", on_delete=models.PROTECT)

    content_panels = Page.content_panels + [
        FieldPanel("author"),
        InlinePanel("image_gallery_sections", label="Image gallery sections"),
    ]


class ImageGallerySection(Orderable, ClusterableModel):
    """Image gallery section, used to display multiple galleries on a page"""
    page = ParentalKey(Page, on_delete=models.CASCADE, related_name="image_gallery_sections")
    title = models.CharField(max_length=100, blank=True)

    panels = [
        FieldPanel("title"),
        MultipleChooserPanel("section_images", chooser_field_name="image")
    ]


class GallerySectionImage(Orderable):
    section = ParentalKey(ImageGallerySection, on_delete=models.CASCADE, related_name="section_images")
    image = models.ForeignKey("wagtailimages.Image", on_delete=models.CASCADE, related_name="+")

    panels = [
        FieldPanel("image"),
    ]