81 lines
3.2 KiB
Python
81 lines
3.2 KiB
Python
import logging
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from xmodule.modulestore.exceptions import ItemNotFoundError
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from xmodule.modulestore import Location
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from xmodule.modulestore.django import modulestore
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from lxml import etree
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import re
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from django.http import HttpResponseBadRequest, Http404
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def get_module_info(store, location, parent_location = None):
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try:
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if location.revision is None:
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module = store.get_item(location)
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else:
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module = store.get_item(location)
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except ItemNotFoundError:
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raise Http404
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return {
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'id': module.location.url(),
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'data': module.definition['data'],
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'metadata': module.metadata
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}
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def set_module_info(store, location, post_data):
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module = None
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isNew = False
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try:
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if location.revision is None:
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module = store.get_item(location)
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else:
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module = store.get_item(location)
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except:
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pass
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if module is None:
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# new module at this location
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# presume that we have an 'Empty' template
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template_location = Location(['i4x', 'edx', 'templates', location.category, 'Empty'])
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module = store.clone_item(template_location, location)
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isNew = True
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if post_data.get('data') is not None:
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data = post_data['data']
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store.update_item(location, data)
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# cdodge: note calling request.POST.get('children') will return None if children is an empty array
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# so it lead to a bug whereby the last component to be deleted in the UI was not actually
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# deleting the children object from the children collection
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if 'children' in post_data and post_data['children'] is not None:
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children = post_data['children']
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store.update_children(location, children)
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# cdodge: also commit any metadata which might have been passed along in the
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# POST from the client, if it is there
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# NOTE, that the postback is not the complete metadata, as there's system metadata which is
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# not presented to the end-user for editing. So let's fetch the original and
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# 'apply' the submitted metadata, so we don't end up deleting system metadata
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if post_data.get('metadata') is not None:
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posted_metadata = post_data['metadata']
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# update existing metadata with submitted metadata (which can be partial)
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# IMPORTANT NOTE: if the client passed pack 'null' (None) for a piece of metadata that means 'remove it'
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for metadata_key in posted_metadata.keys():
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# let's strip out any metadata fields from the postback which have been identified as system metadata
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# and therefore should not be user-editable, so we should accept them back from the client
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if metadata_key in module.system_metadata_fields:
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del posted_metadata[metadata_key]
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elif posted_metadata[metadata_key] is None:
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# remove both from passed in collection as well as the collection read in from the modulestore
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if metadata_key in module.metadata:
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del module.metadata[metadata_key]
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del posted_metadata[metadata_key]
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# overlay the new metadata over the modulestore sourced collection to support partial updates
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module.metadata.update(posted_metadata)
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# commit to datastore
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store.update_metadata(location, module.metadata)
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