move books into subkey of block (#1628)

* move books into subkey of block

* add snippet

* fix syntax errors; add migration

* listblock, stream_data response

---------

Co-authored-by: Michael Volo <[email protected]>

Author: TomWoodward

books/models.py

@@ -74,6 +74,7 @@ def get_book_data(book):
             'has_faculty_resources': has_faculty_resources,
             'has_student_resources': has_student_resources,
             'assignable_book': book.assignable_book,
+            'promote_snippet': book.promote_snippet.stream_block.get_api_representation(book.promote_snippet),
             'promote_tags': [snippet.value.name for snippet in book.promote_snippet],
         }
     except Exception as e:

pages/custom_blocks.py

@@ -326,13 +326,13 @@ def get_api_representation(self, value, context=None):
                 'title': value['title'],
             }
 
-class BookListBlock(blocks.StreamBlock):
+class BookListBlock(blocks.StructBlock):
     books = blocks.PageChooserBlock(page_type=['books.Book'], required=False)
 
     class Meta:
         icon = 'placeholder'
-        label = "Book List"
+        label = "Books"
 
     def get_api_representation(self, value, context=None):
-        # value is a StreamValue of blocks, each with .value as a Book page
-        return [book_data for book in value if (book_data := get_book_data(book.value))]
+        if value:
+            return get_book_data(value['books'])