Add StreamField context to block examples

docs/reference/streamfield/blocks.rst

@@ -373,12 +373,15 @@ Structural block types
 
    .. code-block:: python
 
+       body = StreamField([
+           # ...
            ('person', blocks.StructBlock([
                ('first_name', blocks.CharBlock()),
                ('surname', blocks.CharBlock()),
                ('photo', ImageChooserBlock(required=False)),
                ('biography', blocks.RichTextBlock()),
-       ], icon='user'))
+           ], icon='user')),
+       ])
 
 
    Alternatively, StructBlock can be subclassed to specify a reusable set of sub-blocks:
@@ -421,17 +424,23 @@ Structural block types
 
    .. code-block:: python
 
-       ('ingredients_list', blocks.ListBlock(blocks.CharBlock(label="Ingredient")))
+       body = StreamField([
+           # ...
+           ('ingredients_list', blocks.ListBlock(blocks.CharBlock(label="Ingredient"))),
+       ])
 
 
    Any block type is valid as the sub-block type, including structural types:
 
    .. code-block:: python
 
+       body = StreamField([
+           # ...
            ('ingredients_list', blocks.ListBlock(blocks.StructBlock([
                ('ingredient', blocks.CharBlock()),
                ('amount', blocks.CharBlock(required=False)),
-       ])))
+           ]))),
+       ])
 
    The following additional option is available as either a keyword argument or a Meta class attribute:
 
@@ -444,6 +453,8 @@ Structural block types
 
    .. code-block:: python
 
+       body = StreamField([
+           # ...
            ('carousel', blocks.StreamBlock(
                [
                    ('image', ImageChooserBlock()),
@@ -454,7 +465,8 @@ Structural block types
                    ('video', EmbedBlock()),
                ],
                icon='cogs'
-       ))
+           )),
+       ])
 
 
    As with StructBlock, the list of sub-blocks can also be provided as a subclass of StreamBlock:
@@ -490,12 +502,15 @@ Structural block types
    :param form_classname: An HTML ``class`` attribute to set on the root element of this block as displayed in the editing interface.
 
     .. code-block:: python
-        :emphasize-lines: 4
+       :emphasize-lines: 6
 
+       body = StreamField([
+           # ...
            ('event_promotions', blocks.StreamBlock([
                ('hashtag', blocks.CharBlock()),
                ('post_date', blocks.DateBlock()),
-        ], form_classname='event-promotions'))
+           ], form_classname='event-promotions')),
+       ])
 
     .. code-block:: python
         :emphasize-lines: 6