devilry_gradingsystem — The devilry grading system plugin architecture

How we configure the grading system on an assignment

1 - Select a grading system plugin.

User selects one of the plugins in the devilry.devilry_gradingsystem.pluginregistry.gradingsystempluginregistry.

2 - Configure the grading system plugin

User configures the grading system using the view pointed to by devilry.devilry_gradingsystem.pluginregistry.GradingSystemPluginInterface.get_configuration_url().

Note

This step is skipped unless the plugin has set requires_configuration to True

3 - Configure the maximum number of points possible

User sets the maximum number of points possible.

Note

Plugins can opt out of this step by setting sets_max_points_automatically to True

4 - Choose how students are graded

The user selects one of the possible values for devilry.apps.core.models.Assignment.points_to_grade_mapper):

• Passed failed
• Raw points
• Custom table

5 - Configure the points to grade mapping table (only if custom-table)

If the user selected custom-table, they need to setup that table.

6 - Configure required points to pass

The user selects the number of points required to pass the assignment (devilry.apps.core.models.Assignment.passing_grade_min_points). How they do this depends on the points_to_grade_mapper:

• If raw-points or passed-failed: Select a number of points between 0 and max_points, including both ends.
• If custom table: Select a grade from the table.

Note

Plugins can opt out of this step by setting sets_passing_grade_min_points_automatically)

Creating a Plugin

A grading system plugin must implement the devilry.devilry_gradingsystem.pluginregistry.GradingSystemPluginInterface, and it must register the implemented class with devilry.devilry_gradingsystem.pluginregistry.gradingsystempluginregistry.

Please refer to one of the simple grading system plugins, such as devilry_gradingsystemplugin_points, for a starting point for implementing your own plugin.

API

class devilry.devilry_gradingsystem.pluginregistry.GradingSystemPluginInterface(assignment)

Bases: object

Interface for new grading system plugins. Makes the grading system plugin ready for the global registry.

This interface must be implemented by each grade plugin in the running system. this holds all the global information necessary to be able to manage the grade plugin layout and to cover smooth transition between different grade plugins on different Assignments

id = None

The ID of the registry. Should be a unique string, typically the python path of the module implementing the plugin. This attribute MUST be overidden by each plugin.

title = None

The title of the plugin. Should be a short title, and it should be translated.

description = None

The description of the plugin. Should be translated. Shown with css white-space -- pre-wrap.

requires_configuration = False

True if the plugin require configuration before it can be used. If a plugin sets this to True, is_configured_correctly() and get_configuration_url() must be overridden.

sets_passing_grade_min_points_automatically = False

True if the plugin sets devilry.apps.core.models.Assignment.passing_grade_min_points automatically. If this is True, the plugin must implement get_passing_grade_min_points().

sets_max_points_automatically = False

True if the plugin sets devilry.apps.core.models.Assignment.max_points automatically. If this is True, the plugin must implement get_max_points().

get_passing_grade_min_points()

Get the value for devilry.apps.core.models.Assignment.passing_grade_min_points for this assignment.

MUST be implemented when sets_passing_grade_min_points_automatically is True.

get_max_points()

Get the value for devilry.apps.core.models.Assignment.max_points for this assignment.

MUST be implemented when sets_max_points_automatically is True.

is_configured()

Is the plugins configured in a manner that makes it ready for use on this assignment.

MUST be implemented if requires_configuration is True.

get_configuration_url()

Get the configuration URL for this plugin for this assignment.

MUST be implemented if requires_configuration is True.

get_edit_feedback_url(deliveryid)

Get the feedback editing URL for this plugin for the given deliveryid.

Parameters:deliveryid – The ID of the delivery to provide feedback for.

get_bulkedit_feedback_url(assignmentid)

Get the feedback editing URL for this plugin for the given assignmentid.

Parameters:assignmentid – The ID of the delivery to provide feedback for.

exception devilry.devilry_gradingsystem.pluginregistry.GradingSystemPluginNotInRegistryError

Bases: Exception

Raised by GradingSystemPluginRegistry.get() when a plugin that is not in the registry is requested.

exception devilry.devilry_gradingsystem.pluginregistry.NotGradingSystemPluginError

Bases: Exception

Raised by GradingSystemPluginRegistry.add() when adding a plugin that is not a subclass of GradingSystemPluginInterface.

class devilry.devilry_gradingsystem.pluginregistry.GradingSystemPluginRegistry

Bases: object

Global Registry for grading system plugins.

This registry holds information on each grading system plugin the current setup uses.

The registry is used to decouple providing points for grades from the rest of the grading framework.

add(registryitemcls)

Add a plugin to the registry.

Parameters:registryitemcls – A subclass of GradingSystemPluginInterface. Raises:NotGradingSystemPluginError – If registryitemcls is not a subclass of GradingSystemPluginInterface.

get(id)

Get a grading plugin API class by its ID.

Raises:GradingSystemPluginNotInRegistryError – If the plugin is not found in the registry.

iter_with_assignment(assignment)

Returns an iterator over instances of all the plugins in the registry. Each instance is constructed with the given assignment as their first and only argument.

devilry.devilry_gradingsystem.pluginregistry.gradingsystempluginregistry = <devilry.devilry_gradingsystem.pluginregistry.GradingSystemPluginRegistry object>

The grading system plugin registry. An instance of GradingSystemPluginRegistry. Plugins register themselves through this instance.