These are notable changes in XBlock.
Added Django 3.0, 3.1 & 3.2 support
Upgraded all Python dependencies.
Added XBlockParseException exception.
Fixed import error of mock.
Drop support to python 2.7 and add support to python 3.8. typing package failing on py3.8 so add constraint.
Ensure the version file is closed after reading its content.
Changed how illegal XML characters are sanitized, to speed the operation. The old way was removing more characters than are required by the XML specification.
Add support for relative dates to DateTime fields.
Changes for Python 2/3 compatibility.
Added an API for notifying the Runtime when an XBlock’s
save() method is
Added a mechanism for Runtime subclasses to more easily add extra CSS classes
<div> that wraps rendered XBlocks
Allow Mixologist class to consume both class objects and string paths to classes as a part of initialization.
Add a method to get completion mode for a block.
Suppress a spurious warning when using lazily-translated text as the default value of a String field.
Add capability for XBlockAsides to apply only to XBlocks that match certain conditions
Introduce Python 3 compatibility to the xblock code base. This does not enable Python 2 codebases (like edx-platform) to load xblocks written in Python 3, but it lays the groundwork for future migrations.
No notes provided.
Separate Fragment class out into new web-fragments package
Make Scope enums (UserScope.* and BlockScope.*) into Sentinels, rather than just ints, so that they can have more meaningful string representations.
Rename export_xml to add_xml_to_node, to more accurately capture the semantics.
Allowed Runtime implementations to customize loading from block_types to XBlock classes.
Added services available through Runtime.service, once XBlocks have announced their desires with @XBlock.needs and @XBlock.wants.
The “i18n” service provides a gettext.Translations object for retrieving localized strings.
Make context an optional parameter for all views.
Add shortcut method to make rendering an XBlock’s view with its own runtime easier.
Change the user field of scopes to be three valued, rather than two. False becomes UserScope.NONE, True becomes UserScope.ONE, and UserScope.ALL is new, and represents data that is computed based on input from many users.
Rename ModelData to FieldData.
Rename ModelType to Field.
Split xblock.core into a number of smaller modules:
xblock.core: Defines XBlock.
xblock.fields: Defines ModelType and subclasses, ModelData, and metaclasses for classes with fields.
xblock.namespaces: Code for XBlock Namespaces only.
xblock.exceptions: exceptions used by all parts of the XBlock project.
Changed the interface for Runtime and ModelData so that they function as single objects that manage large numbers of XBlocks. Any method that operates on a block now takes that block as the first argument. Blocks, in turn, are responsible for storing the key values used by their field scopes.
Changed the interface for model_data objects passed to XBlocks from dict-like to the being cache-like (as was already used by KeyValueStore). This removes the need to support methods like iteration and length, which makes it easier to write new ModelDatas. Also added an actual ModelData base class to serve as the expected interface.