def test_inherited_field(self):
kvs = InheritanceKeyValueStore(
initial_values={}, inherited_settings={'showanswer': 'inherited'})
model_data = DbModel(kvs)
descriptor = self.get_descriptor(model_data)
editable_fields = descriptor.editable_metadata_fields
self.assert_field_values(editable_fields,
'showanswer',
InheritanceMixin.showanswer,
explicitly_set=False,
value='inherited',
default_value='inherited')
# Mimic the case where display_name WOULD have been inherited, except we explicitly set it.
kvs = InheritanceKeyValueStore(
initial_values={'showanswer': 'explicit'},
inherited_settings={'showanswer': 'inheritable value'})
model_data = DbModel(kvs)
descriptor = self.get_descriptor(model_data)
editable_fields = descriptor.editable_metadata_fields
self.assert_field_values(editable_fields,
'showanswer',
InheritanceMixin.showanswer,
explicitly_set=True,
value='explicit',
default_value='inheritable value')
def test_db_model_keys():
# Tests that updates to fields are properly recorded in the KeyValueStore,
# and that the keys have been constructed correctly
key_store = DictKeyValueStore()
db_model = DbModel(key_store)
runtime = Runtime(Mock(), db_model, [TestMixin])
tester = runtime.construct_xblock_from_class(TestXBlock, ScopeIds('s0', 'TestXBlock', 'd0', 'u0'))
assert_false(db_model.has(tester, 'not a field'))
for field in tester.fields.values():
new_value = 'new ' + field.name
assert_false(db_model.has(tester, field.name))
setattr(tester, field.name, new_value)
# Write out the values
tester.save()
# Make sure everything saved correctly
for field in tester.fields.values():
assert_true(db_model.has(tester, field.name))
def get_key_value(scope, user_id, block_scope_id, field_name):
"""Gets the value, from `key_store`, of a Key with the given values."""
new_key = KeyValueStore.Key(scope, user_id, block_scope_id, field_name)
return key_store.db_dict[new_key]
# Examine each value in the database and ensure that keys were constructed correctly
assert_equals('new content', get_key_value(Scope.content, None, 'd0', 'content'))
assert_equals('new settings', get_key_value(Scope.settings, None, 'u0', 'settings'))
assert_equals('new user_state', get_key_value(Scope.user_state, 's0', 'u0', 'user_state'))
assert_equals('new preferences', get_key_value(Scope.preferences, 's0', 'TestXBlock', 'preferences'))
assert_equals('new user_info', get_key_value(Scope.user_info, 's0', None, 'user_info'))
assert_equals('new by_type', get_key_value(Scope(UserScope.NONE, BlockScope.TYPE), None, 'TestXBlock', 'by_type'))
assert_equals('new for_all', get_key_value(Scope(UserScope.NONE, BlockScope.ALL), None, None, 'for_all'))
assert_equals('new user_def', get_key_value(Scope(UserScope.ONE, BlockScope.DEFINITION), 's0', 'd0', 'user_def'))
assert_equals('new agg_global', get_key_value(Scope(UserScope.ALL, BlockScope.ALL), None, None, 'agg_global'))
assert_equals('new agg_type', get_key_value(Scope(UserScope.ALL, BlockScope.TYPE), None, 'TestXBlock', 'agg_type'))
assert_equals('new agg_def', get_key_value(Scope(UserScope.ALL, BlockScope.DEFINITION), None, 'd0', 'agg_def'))
assert_equals('new agg_usage', get_key_value(Scope.user_state_summary, None, 'u0', 'agg_usage'))
assert_equals('new mixin_content', get_key_value(Scope.content, None, 'd0', 'mixin_content'))
assert_equals('new mixin_settings', get_key_value(Scope.settings, None, 'u0', 'mixin_settings'))
assert_equals('new mixin_user_state', get_key_value(Scope.user_state, 's0', 'u0', 'mixin_user_state'))
assert_equals('new mixin_preferences', get_key_value(Scope.preferences, 's0', 'TestXBlock', 'mixin_preferences'))
assert_equals('new mixin_user_info', get_key_value(Scope.user_info, 's0', None, 'mixin_user_info'))
assert_equals('new mixin_by_type', get_key_value(Scope(UserScope.NONE, BlockScope.TYPE), None, 'TestXBlock', 'mixin_by_type'))
assert_equals('new mixin_for_all', get_key_value(Scope(UserScope.NONE, BlockScope.ALL), None, None, 'mixin_for_all'))
assert_equals('new mixin_user_def', get_key_value(Scope(UserScope.ONE, BlockScope.DEFINITION), 's0', 'd0', 'mixin_user_def'))
assert_equals('new mixin_agg_global', get_key_value(Scope(UserScope.ALL, BlockScope.ALL), None, None, 'mixin_agg_global'))
assert_equals('new mixin_agg_type', get_key_value(Scope(UserScope.ALL, BlockScope.TYPE), None, 'TestXBlock', 'mixin_agg_type'))
assert_equals('new mixin_agg_def', get_key_value(Scope(UserScope.ALL, BlockScope.DEFINITION), None, 'd0', 'mixin_agg_def'))
assert_equals('new mixin_agg_usage', get_key_value(Scope.user_state_summary, None, 'u0', 'mixin_agg_usage'))
def test_db_model_keys():
# Tests that updates to fields are properly recorded in the KeyValueStore,
# and that the keys have been constructed correctly
key_store = DictKeyValueStore()
db_model = DbModel(key_store)
runtime = Runtime(Mock(), db_model, [TestMixin])
tester = runtime.construct_xblock_from_class(TestXBlock, ScopeIds('s0', 'TestXBlock', 'd0', 'u0'))
assert_false(db_model.has(tester, 'not a field'))
for field in tester.fields.values():
new_value = 'new ' + field.name
assert_false(db_model.has(tester, field.name))
setattr(tester, field.name, new_value)
# Write out the values
tester.save()
# Make sure everything saved correctly
for field in tester.fields.values():
assert_true(db_model.has(tester, field.name))
def get_key_value(scope, user_id, block_scope_id, field_name):
"""Gets the value, from `key_store`, of a Key with the given values."""
new_key = KeyValueStore.Key(scope, user_id, block_scope_id, field_name)
return key_store.db_dict[new_key]
# Examine each value in the database and ensure that keys were constructed correctly
assert_equals('new content', get_key_value(Scope.content, None, 'd0', 'content'))
assert_equals('new settings', get_key_value(Scope.settings, None, 'u0', 'settings'))
assert_equals('new user_state', get_key_value(Scope.user_state, 's0', 'u0', 'user_state'))
assert_equals('new preferences', get_key_value(Scope.preferences, 's0', 'TestXBlock', 'preferences'))
assert_equals('new user_info', get_key_value(Scope.user_info, 's0', None, 'user_info'))
assert_equals('new by_type', get_key_value(Scope(UserScope.NONE, BlockScope.TYPE), None, 'TestXBlock', 'by_type'))
assert_equals('new for_all', get_key_value(Scope(UserScope.NONE, BlockScope.ALL), None, None, 'for_all'))
assert_equals('new user_def', get_key_value(Scope(UserScope.ONE, BlockScope.DEFINITION), 's0', 'd0', 'user_def'))
assert_equals('new agg_global', get_key_value(Scope(UserScope.ALL, BlockScope.ALL), None, None, 'agg_global'))
assert_equals('new agg_type', get_key_value(Scope(UserScope.ALL, BlockScope.TYPE), None, 'TestXBlock', 'agg_type'))
assert_equals('new agg_def', get_key_value(Scope(UserScope.ALL, BlockScope.DEFINITION), None, 'd0', 'agg_def'))
assert_equals('new agg_usage', get_key_value(Scope.user_state_summary, None, 'u0', 'agg_usage'))
assert_equals('new mixin_content', get_key_value(Scope.content, None, 'd0', 'mixin_content'))
assert_equals('new mixin_settings', get_key_value(Scope.settings, None, 'u0', 'mixin_settings'))
assert_equals('new mixin_user_state', get_key_value(Scope.user_state, 's0', 'u0', 'mixin_user_state'))
assert_equals('new mixin_preferences', get_key_value(Scope.preferences, 's0', 'TestXBlock', 'mixin_preferences'))
assert_equals('new mixin_user_info', get_key_value(Scope.user_info, 's0', None, 'mixin_user_info'))
assert_equals('new mixin_by_type', get_key_value(Scope(UserScope.NONE, BlockScope.TYPE), None, 'TestXBlock', 'mixin_by_type'))
assert_equals('new mixin_for_all', get_key_value(Scope(UserScope.NONE, BlockScope.ALL), None, None, 'mixin_for_all'))
assert_equals('new mixin_user_def', get_key_value(Scope(UserScope.ONE, BlockScope.DEFINITION), 's0', 'd0', 'mixin_user_def'))
assert_equals('new mixin_agg_global', get_key_value(Scope(UserScope.ALL, BlockScope.ALL), None, None, 'mixin_agg_global'))
assert_equals('new mixin_agg_type', get_key_value(Scope(UserScope.ALL, BlockScope.TYPE), None, 'TestXBlock', 'mixin_agg_type'))
assert_equals('new mixin_agg_def', get_key_value(Scope(UserScope.ALL, BlockScope.DEFINITION), None, 'd0', 'mixin_agg_def'))
assert_equals('new mixin_agg_usage', get_key_value(Scope.user_state_summary, None, 'u0', 'mixin_agg_usage'))
def test_runtime_render():
key_store = DictKeyValueStore()
db_model = DbModel(key_store)
runtime = MockRuntimeForQuerying()
tester = TestXBlock(runtime, db_model, Mock())
# string we want to update using the handler
update_string = u"user state update"
# test against the student view
frag = runtime.render(tester, 'student_view', [update_string])
assert_equals(frag.body_html(), update_string)
assert_equals(tester.preferences, update_string)
# test against the fallback view
update_string = u"new update"
frag = runtime.render(tester, 'test_fallback_view', [update_string])
assert_equals(frag.body_html(), update_string)
assert_equals(tester.preferences, update_string)
# test block-first
update_string = u"penultimate update"
frag = tester.render('student_view', [update_string])
assert_equals(frag.body_html(), update_string)
assert_equals(tester.preferences, update_string)
# test against the no-fallback XBlock
update_string = u"ultimate update"
tester = TestXBlockNoFallback(Mock(), db_model, Mock())
with assert_raises(NoSuchViewError):
runtime.render(tester, 'test_nonexistant_view', [update_string])
def preview_model_data(descriptor):
return DbModel(
SessionKeyValueStore(request, descriptor._model_data),
descriptor.module_class,
preview_id,
MongoUsage(preview_id, descriptor.location.url()),
)
def from_xml(cls, xml_data, system, org=None, course=None):
"""
Creates an instance of this descriptor from the supplied xml_data.
This may be overridden by subclasses
xml_data: A string of xml that will be translated into data and children for
this module
system: A DescriptorSystem for interacting with external resources
org and course are optional strings that will be used in the generated modules
url identifiers
"""
xml_object = etree.fromstring(xml_data)
url_name = xml_object.get('url_name', xml_object.get('slug'))
location = Location('i4x', org, course, 'video', url_name)
if is_pointer_tag(xml_object):
filepath = cls._format_filepath(xml_object.tag,
name_to_pathname(url_name))
xml_data = etree.tostring(
cls.load_file(filepath, system.resources_fs, location))
field_data = cls._parse_video_xml(xml_data)
field_data['location'] = location
kvs = InheritanceKeyValueStore(initial_values=field_data)
field_data = DbModel(kvs)
video = system.construct_xblock_from_class(
cls,
# We're loading a descriptor, so student_id is meaningless
# We also don't have separate notions of definition and usage ids yet,
# so we use the location for both
ScopeIds(None, location.category, location, location),
field_data,
)
return video
def preview_model_data(descriptor):
"Helper method to create a DbModel from a descriptor"
return DbModel(
SessionKeyValueStore(request, descriptor._model_data),
descriptor.module_class,
preview_id,
MongoUsage(preview_id, descriptor.location.url()),
)
def load_item(self, location):
"""
Return an XModule instance for the specified location
"""
location = Location(location)
json_data = self.module_data.get(location)
if json_data is None:
module = self.modulestore.get_item(location)
if module is not None:
# update our own cache after going to the DB to get cache miss
self.module_data.update(module.runtime.module_data)
return module
else:
# load the module and apply the inherited metadata
try:
category = json_data['location']['category']
class_ = XModuleDescriptor.load_class(category,
self.default_class)
definition = json_data.get('definition', {})
metadata = json_data.get('metadata', {})
for old_name, new_name in getattr(class_,
'metadata_translations',
{}).items():
if old_name in metadata:
metadata[new_name] = metadata[old_name]
del metadata[old_name]
kvs = MongoKeyValueStore(
definition.get('data', {}),
definition.get('children', []),
metadata,
)
field_data = DbModel(kvs)
scope_ids = ScopeIds(None, category, location, location)
module = self.construct_xblock_from_class(
class_, field_data, scope_ids)
if self.cached_metadata is not None:
# parent container pointers don't differentiate between draft and non-draft
# so when we do the lookup, we should do so with a non-draft location
non_draft_loc = location.replace(revision=None)
# Convert the serialized fields values in self.cached_metadata
# to python values
metadata_to_inherit = self.cached_metadata.get(
non_draft_loc.url(), {})
inherit_metadata(module, metadata_to_inherit)
# decache any computed pending field settings
module.save()
return module
except:
log.warning("Failed to load descriptor", exc_info=True)
return ErrorDescriptor.from_json(json_data,
self,
json_data['location'],
error_msg=exc_info_to_str(
sys.exc_info()))
def xblock_from_json(self,
class_,
usage_id,
json_data,
course_entry_override=None):
if course_entry_override is None:
course_entry_override = self.course_entry
# most likely a lazy loader or the id directly
definition = json_data.get('definition', {})
definition_id = self.modulestore.definition_locator(definition)
# If no usage id is provided, generate an in-memory id
if usage_id is None:
usage_id = LocalId()
block_locator = BlockUsageLocator(
version_guid=course_entry_override['_id'],
usage_id=usage_id,
course_id=course_entry_override.get('course_id'),
branch=course_entry_override.get('branch'))
kvs = SplitMongoKVS(
definition,
json_data.get('fields', {}),
json_data.get('_inherited_settings'),
)
field_data = DbModel(kvs)
try:
module = self.construct_xblock_from_class(
class_, field_data,
ScopeIds(None, json_data.get('category'), definition_id,
block_locator))
except Exception:
log.warning("Failed to load descriptor", exc_info=True)
return ErrorDescriptor.from_json(
json_data,
self,
BlockUsageLocator(version_guid=course_entry_override['_id'],
usage_id=usage_id),
error_msg=exc_info_to_str(sys.exc_info()))
edit_info = json_data.get('edit_info', {})
module.edited_by = edit_info.get('edited_by')
module.edited_on = edit_info.get('edited_on')
module.previous_version = edit_info.get('previous_version')
module.update_version = edit_info.get('update_version')
module.definition_locator = self.modulestore.definition_locator(
definition)
# decache any pending field settings
module.save()
# If this is an in-memory block, store it in this system
if isinstance(block_locator.usage_id, LocalId):
self.local_modules[block_locator] = module
return module
def create_xblock(usage, student_id=None):
"""Create an XBlock instance.
This will be invoked to create new instances for every request.
"""
block_cls = XBlock.load_class(usage.block_name)
runtime = WorkbenchRuntime(block_cls, student_id, usage)
model = DbModel(MEMORY_KVS, block_cls, student_id, usage)
block = block_cls(runtime, model)
return block
def test_default_fn():
key_store = SerialDefaultKVS()
db_model = DbModel(key_store)
tester = TestIntegerXblock(Mock(), db_model, Mock())
tester2 = TestIntegerXblock(Mock(), db_model, Mock())
# ensure value is not in tester before any actions
assert_false(db_model.has(tester, 'counter'))
# ensure value is same over successive calls for same DbModel
first_call = tester.counter
assert_equals(first_call, 1)
assert_equals(first_call, tester.counter)
# ensure the value is not saved in the object
assert_false(db_model.has(tester, 'counter'))
# ensure save does not save the computed default back to the object
tester.save()
assert_false(db_model.has(tester, 'counter'))
# ensure second object gets another value
second_call = tester2.counter
assert_equals(second_call, 2)
def test_default_fn():
key_store = SerialDefaultKVS()
db_model = DbModel(key_store)
tester = TestIntegerXblock(Mock(), db_model, Mock())
tester2 = TestIntegerXblock(Mock(), db_model, Mock())
# ensure value is not in tester before any actions
assert_false(db_model.has(tester, 'counter'))
# ensure value is same over successive calls for same DbModel
first_call = tester.counter
assert_equals(first_call, 1)
assert_equals(first_call, tester.counter)
# ensure the value is not saved in the object
assert_false(db_model.has(tester, 'counter'))
# ensure save does not save the computed default back to the object
tester.save()
assert_false(db_model.has(tester, 'counter'))
# ensure second object gets another value
second_call = tester2.counter
assert_equals(second_call, 2)
def _create_new_model_data(self, category, location, definition_data,
metadata):
"""
To instantiate a new xmodule which will be saved latter, set up the dbModel and kvs
"""
kvs = MongoKeyValueStore(definition_data, [], metadata, location,
category)
class_ = XModuleDescriptor.load_class(category, self.default_class)
model_data = DbModel(kvs, class_, None, MongoUsage(None, location))
model_data['category'] = category
model_data['location'] = location
return model_data
def _load_preview_module(request, descriptor):
"""
Return a preview XModule instantiated from the supplied descriptor.
request: The active django request
descriptor: An XModuleDescriptor
"""
student_data = DbModel(SessionKeyValueStore(request))
descriptor.bind_for_student(
_preview_module_system(request, descriptor),
LmsFieldData(descriptor._field_data, student_data), # pylint: disable=protected-access
)
return descriptor
def _create_new_field_data(self, category, location, definition_data,
metadata):
"""
To instantiate a new xmodule which will be saved latter, set up the dbModel and kvs
"""
kvs = MongoKeyValueStore(
definition_data,
[],
metadata,
)
field_data = DbModel(kvs)
return field_data
def load_item(self, location):
"""
Return an XModule instance for the specified location
"""
location = Location(location)
json_data = self.module_data.get(location)
if json_data is None:
module = self.modulestore.get_item(location)
if module is not None:
# update our own cache after going to the DB to get cache miss
self.module_data.update(module.system.module_data)
return module
else:
# load the module and apply the inherited metadata
try:
class_ = XModuleDescriptor.load_class(
json_data['location']['category'],
self.default_class
)
definition = json_data.get('definition', {})
metadata = json_data.get('metadata', {})
for old_name, new_name in class_.metadata_translations.items():
if old_name in metadata:
metadata[new_name] = metadata[old_name]
del metadata[old_name]
kvs = MongoKeyValueStore(
definition.get('data', {}),
definition.get('children', []),
metadata,
)
model_data = DbModel(kvs, class_, None, MongoUsage(
self.course_id, location))
module = class_(self, location, model_data)
if self.cached_metadata is not None:
# parent container pointers don't differentiate between draft and non-draft
# so when we do the lookup, we should do so with a non-
# draft location
non_draft_loc = location._replace(revision=None)
metadata_to_inherit = self.cached_metadata.get(
non_draft_loc.url(), {})
inherit_metadata(module, metadata_to_inherit)
return module
except:
log.warning("Failed to load descriptor", exc_info=True)
return ErrorDescriptor.from_json(
json_data,
self,
error_msg=exc_info_to_str(sys.exc_info())
)
def xblock_from_json(self,
class_,
usage_id,
json_data,
course_entry_override=None):
if course_entry_override is None:
course_entry_override = self.course_entry
# most likely a lazy loader or the id directly
definition = json_data.get('definition', {})
block_locator = BlockUsageLocator(
version_guid=course_entry_override['_id'],
usage_id=usage_id,
course_id=course_entry_override.get('course_id'),
branch=course_entry_override.get('branch'))
kvs = SplitMongoKVS(definition, json_data.get('fields', {}),
json_data.get('_inherited_settings'),
block_locator, json_data.get('category'))
model_data = DbModel(
kvs,
class_,
None,
SplitMongoKVSid(
# DbModel req's that these support .url()
block_locator,
self.modulestore.definition_locator(definition)))
try:
module = class_(self, model_data)
except Exception:
log.warning("Failed to load descriptor", exc_info=True)
if usage_id is None:
usage_id = "MISSING"
return ErrorDescriptor.from_json(
json_data,
self,
BlockUsageLocator(version_guid=course_entry_override['_id'],
usage_id=usage_id),
error_msg=exc_info_to_str(sys.exc_info()))
edit_info = json_data.get('edit_info', {})
module.edited_by = edit_info.get('edited_by')
module.edited_on = edit_info.get('edited_on')
module.previous_version = edit_info.get('previous_version')
module.update_version = edit_info.get('update_version')
module.definition_locator = self.modulestore.definition_locator(
definition)
# decache any pending field settings
module.save()
return module
def load_preview_module(request, preview_id, descriptor):
"""
Return a preview XModule instantiated from the supplied descriptor.
request: The active django request
preview_id (str): An identifier specifying which preview this module is used for
descriptor: An XModuleDescriptor
"""
student_data = DbModel(SessionKeyValueStore(request))
descriptor.bind_for_student(
preview_module_system(request, preview_id, descriptor),
LmsFieldData(descriptor._field_data, student_data), # pylint: disable=protected-access
)
return descriptor
def test_view_counter_state():
key_store = DictKeyValueStore()
db_model = DbModel(key_store)
tester = ViewCounter(Mock(), db_model, Mock())
assert_equals(tester.views, 0)
# View the XBlock five times
for i in xrange(5):
generated_html = tester.student_view({})
# Make sure the html fragment we're expecting appears in the body_html
assert_in('<span class="views">{0}</span>'.format(i + 1),
generated_html.body_html())
assert_equals(tester.views, i + 1)
def test_runtime_handle():
# Test a simple handler and a fallback handler
key_store = DictKeyValueStore()
db_model = DbModel(key_store)
tester = TestXBlock(Mock(), db_model, Mock())
runtime = MockRuntimeForQuerying()
# string we want to update using the handler
update_string = "user state update"
assert_equals(runtime.handle(tester, 'existing_handler', update_string),
'I am the existing test handler')
assert_equals(tester.user_state, update_string)
# when the handler needs to use the fallback as given name can't be found
new_update_string = "new update"
assert_equals(runtime.handle(tester, 'test_fallback_handler', new_update_string),
'I have been handled')
assert_equals(tester.user_state, new_update_string)
# request to use a handler which doesn't have XBlock.handler decoration
# should use the fallback
new_update_string = "new update"
assert_equals(runtime.handle(tester, 'handler_without_correct_decoration', new_update_string),
'gone to fallback')
assert_equals(tester.user_state, new_update_string)
# handler can't be found & no fallback handler supplied, should throw an exception
tester = TestXBlockNoFallback(Mock(), db_model, Mock())
ultimate_string = "ultimate update"
with assert_raises(NoSuchHandlerError):
runtime.handle(tester, 'test_nonexistant_fallback_handler', ultimate_string)
# request to use a handler which doesn't have XBlock.handler decoration
# and no fallback should raise NoSuchHandlerError
with assert_raises(NoSuchHandlerError):
runtime.handle(tester, 'handler_without_correct_decoration', 'handled')
def from_xml(cls, xml_data, system, org=None, course=None):
"""
Creates an instance of this descriptor from the supplied xml_data.
This may be overridden by subclasses
xml_data: A string of xml that will be translated into data and children for
this module
system: A DescriptorSystem for interacting with external resources
org and course are optional strings that will be used in the generated modules
url identifiers
"""
xml_object = etree.fromstring(xml_data)
# VS[compat] -- just have the url_name lookup, once translation is done
url_name = xml_object.get('url_name', xml_object.get('slug'))
location = Location('i4x', org, course, xml_object.tag, url_name)
# VS[compat] -- detect new-style each-in-a-file mode
if is_pointer_tag(xml_object):
# new style:
# read the actual definition file--named using url_name.replace(':','/')
filepath = cls._format_filepath(xml_object.tag,
name_to_pathname(url_name))
definition_xml = cls.load_file(filepath, system.resources_fs,
location)
else:
definition_xml = xml_object
filepath = None
definition, children = cls.load_definition(
definition_xml, system, location) # note this removes metadata
# VS[compat] -- make Ike's github preview links work in both old and
# new file layouts
if is_pointer_tag(xml_object):
# new style -- contents actually at filepath
definition['filename'] = [filepath, filepath]
metadata = cls.load_metadata(definition_xml)
# move definition metadata into dict
dmdata = definition.get('definition_metadata', '')
if dmdata:
metadata['definition_metadata_raw'] = dmdata
try:
metadata.update(json.loads(dmdata))
except Exception as err:
log.debug('Error %s in loading metadata %s' % (err, dmdata))
metadata['definition_metadata_err'] = str(err)
# Set/override any metadata specified by policy
k = policy_key(location)
if k in system.policy:
cls.apply_policy(metadata, system.policy[k])
field_data = {}
field_data.update(metadata)
field_data.update(definition)
field_data['children'] = children
field_data['xml_attributes']['filename'] = definition.get(
'filename', ['', None]) # for git link
field_data['location'] = location
field_data['category'] = xml_object.tag
kvs = InheritanceKeyValueStore(initial_values=field_data)
field_data = DbModel(kvs)
return system.construct_xblock_from_class(
cls,
# We're loading a descriptor, so student_id is meaningless
# We also don't have separate notions of definition and usage ids yet,
# so we use the location for both
ScopeIds(None, location.category, location, location),
field_data,
)
def xblock_model_data(descriptor):
return DbModel(
LmsKeyValueStore(descriptor._model_data, model_data_cache),
descriptor.module_class, user.id,
LmsUsage(descriptor.location, descriptor.location))
def xblock_field_data(descriptor):
student_data = DbModel(DjangoKeyValueStore(field_data_cache))
return lms_field_data(descriptor._field_data, student_data)
def __init__(self, student_id=None):
super(WorkbenchRuntime, self).__init__(USAGE_STORE,
DbModel(WORKBENCH_KVS))
self.student_id = student_id
def get_module_for_descriptor_internal(user,
descriptor,
field_data_cache,
course_id,
track_function,
xqueue_callback_url_prefix,
position=None,
wrap_xmodule_display=True,
grade_bucket_type=None,
static_asset_path=''):
"""
Actually implement get_module, without requiring a request.
See get_module() docstring for further details.
"""
# Short circuit--if the user shouldn't have access, bail without doing any work
if not has_access(user, descriptor, 'load', course_id):
return None
student_data = DbModel(DjangoKeyValueStore(field_data_cache))
descriptor._field_data = LmsFieldData(descriptor._field_data, student_data)
# Setup system context for module instance
ajax_url = reverse(
'modx_dispatch',
kwargs=dict(course_id=course_id,
location=descriptor.location.url(),
dispatch=''),
)
# Intended use is as {ajax_url}/{dispatch_command}, so get rid of the trailing slash.
ajax_url = ajax_url.rstrip('/')
def make_xqueue_callback(dispatch='score_update'):
# Fully qualified callback URL for external queueing system
relative_xqueue_callback_url = reverse(
'xqueue_callback',
kwargs=dict(course_id=course_id,
userid=str(user.id),
mod_id=descriptor.location.url(),
dispatch=dispatch),
)
return xqueue_callback_url_prefix + relative_xqueue_callback_url
# Default queuename is course-specific and is derived from the course that
# contains the current module.
# TODO: Queuename should be derived from 'course_settings.json' of each course
xqueue_default_queuename = descriptor.location.org + '-' + descriptor.location.course
xqueue = {
'interface': xqueue_interface,
'construct_callback': make_xqueue_callback,
'default_queuename': xqueue_default_queuename.replace(' ', '_'),
'waittime': settings.XQUEUE_WAITTIME_BETWEEN_REQUESTS
}
# This is a hacky way to pass settings to the combined open ended xmodule
# It needs an S3 interface to upload images to S3
# It needs the open ended grading interface in order to get peer grading to be done
# this first checks to see if the descriptor is the correct one, and only sends settings if it is
# Get descriptor metadata fields indicating needs for various settings
needs_open_ended_interface = getattr(descriptor,
"needs_open_ended_interface", False)
needs_s3_interface = getattr(descriptor, "needs_s3_interface", False)
# Initialize interfaces to None
open_ended_grading_interface = None
s3_interface = None
# Create interfaces if needed
if needs_open_ended_interface:
open_ended_grading_interface = settings.OPEN_ENDED_GRADING_INTERFACE
open_ended_grading_interface[
'mock_peer_grading'] = settings.MOCK_PEER_GRADING
open_ended_grading_interface[
'mock_staff_grading'] = settings.MOCK_STAFF_GRADING
if needs_s3_interface:
s3_interface = {
'access_key':
getattr(settings, 'AWS_ACCESS_KEY_ID', ''),
'secret_access_key':
getattr(settings, 'AWS_SECRET_ACCESS_KEY', ''),
'storage_bucket_name':
getattr(settings, 'AWS_STORAGE_BUCKET_NAME', 'openended')
}
def inner_get_module(descriptor):
"""
Delegate to get_module_for_descriptor_internal() with all values except `descriptor` set.
Because it does an access check, it may return None.
"""
# TODO: fix this so that make_xqueue_callback uses the descriptor passed into
# inner_get_module, not the parent's callback. Add it as an argument....
return get_module_for_descriptor_internal(
user, descriptor, field_data_cache, course_id, track_function,
make_xqueue_callback, position, wrap_xmodule_display,
grade_bucket_type, static_asset_path)
def publish(event):
"""A function that allows XModules to publish events. This only supports grade changes right now."""
if event.get('event_name') != 'grade':
return
# Construct the key for the module
key = KeyValueStore.Key(scope=Scope.user_state,
user_id=user.id,
block_scope_id=descriptor.location,
field_name='grade')
student_module = field_data_cache.find_or_create(key)
# Update the grades
student_module.grade = event.get('value')
student_module.max_grade = event.get('max_value')
# Save all changes to the underlying KeyValueStore
student_module.save()
# Bin score into range and increment stats
score_bucket = get_score_bucket(student_module.grade,
student_module.max_grade)
org, course_num, run = course_id.split("/")
tags = [
"org:{0}".format(org), "course:{0}".format(course_num),
"run:{0}".format(run), "score_bucket:{0}".format(score_bucket)
]
if grade_bucket_type is not None:
tags.append('type:%s' % grade_bucket_type)
dog_stats_api.increment("lms.courseware.question_answered", tags=tags)
# Build a list of wrapping functions that will be applied in order
# to the Fragment content coming out of the xblocks that are about to be rendered.
block_wrappers = []
# Wrap the output display in a single div to allow for the XModule
# javascript to be bound correctly
if wrap_xmodule_display is True:
block_wrappers.append(wrap_xblock)
# TODO (cpennington): When modules are shared between courses, the static
# prefix is going to have to be specific to the module, not the directory
# that the xml was loaded from
# Rewrite urls beginning in /static to point to course-specific content
block_wrappers.append(
partial(replace_static_urls,
getattr(descriptor, 'data_dir', None),
course_id=course_id,
static_asset_path=static_asset_path
or descriptor.static_asset_path))
# Allow URLs of the form '/course/' refer to the root of multicourse directory
# hierarchy of this course
block_wrappers.append(partial(replace_course_urls, course_id))
# this will rewrite intra-courseware links (/jump_to_id/<id>). This format
# is an improvement over the /course/... format for studio authored courses,
# because it is agnostic to course-hierarchy.
# NOTE: module_id is empty string here. The 'module_id' will get assigned in the replacement
# function, we just need to specify something to get the reverse() to work.
block_wrappers.append(
partial(
replace_jump_to_id_urls,
course_id,
reverse('jump_to_id',
kwargs={
'course_id': course_id,
'module_id': ''
}),
))
if settings.MITX_FEATURES.get('DISPLAY_HISTOGRAMS_TO_STAFF'):
if has_access(user, descriptor, 'staff', course_id):
block_wrappers.append(partial(add_histogram, user))
system = ModuleSystem(
track_function=track_function,
render_template=render_to_string,
static_url=settings.STATIC_URL,
ajax_url=ajax_url,
xqueue=xqueue,
# TODO (cpennington): Figure out how to share info between systems
filestore=descriptor.runtime.resources_fs,
get_module=inner_get_module,
user=user,
debug=settings.DEBUG,
hostname=settings.SITE_NAME,
# TODO (cpennington): This should be removed when all html from
# a module is coming through get_html and is therefore covered
# by the replace_static_urls code below
replace_urls=partial(
static_replace.replace_static_urls,
data_directory=getattr(descriptor, 'data_dir', None),
course_id=course_id,
static_asset_path=static_asset_path
or descriptor.static_asset_path,
),
replace_course_urls=partial(static_replace.replace_course_urls,
course_id=course_id),
replace_jump_to_id_urls=partial(static_replace.replace_jump_to_id_urls,
course_id=course_id,
jump_to_id_base_url=reverse(
'jump_to_id',
kwargs={
'course_id': course_id,
'module_id': ''
})),
node_path=settings.NODE_PATH,
publish=publish,
anonymous_student_id=unique_id_for_user(user),
course_id=course_id,
open_ended_grading_interface=open_ended_grading_interface,
s3_interface=s3_interface,
cache=cache,
can_execute_unsafe_code=(lambda: can_execute_unsafe_code(course_id)),
# TODO: When we merge the descriptor and module systems, we can stop reaching into the mixologist (cpennington)
mixins=descriptor.runtime.mixologist._mixins, # pylint: disable=protected-access
wrappers=block_wrappers,
)
# pass position specified in URL to module through ModuleSystem
system.set('position', position)
if settings.MITX_FEATURES.get('ENABLE_PSYCHOMETRICS'):
system.set(
'psychometrics_handler', # set callback for updating PsychometricsData
make_psychometrics_data_update_handler(course_id, user,
descriptor.location.url()))
system.set('user_is_staff',
has_access(user, descriptor.location, 'staff', course_id))
# make an ErrorDescriptor -- assuming that the descriptor's system is ok
if has_access(user, descriptor.location, 'staff', course_id):
system.error_descriptor_class = ErrorDescriptor
else:
system.error_descriptor_class = NonStaffErrorDescriptor
descriptor.xmodule_runtime = system
descriptor.scope_ids = descriptor.scope_ids._replace(user_id=user.id)
return descriptor
def preview_field_data(descriptor):
"Helper method to create a DbModel from a descriptor"
student_data = DbModel(SessionKeyValueStore(request))
return lms_field_data(descriptor._field_data, student_data)