__init__.py 文件源码

def instance_view_jsonld(request):
    from assembl.semantic.virtuoso_mapping import AssemblQuadStorageManager
    from rdflib import URIRef, ConjunctiveGraph
    ctx = request.context
    user_id = authenticated_userid(request) or Everyone
    permissions = ctx.get_permissions()
    instance = ctx._instance
    if not instance.user_can(user_id, CrudPermissions.READ, permissions):
        raise HTTPUnauthorized()
    discussion = ctx.get_instance_of_class(Discussion)
    if not discussion:
        raise HTTPNotFound()
    aqsm = AssemblQuadStorageManager()
    uri = URIRef(aqsm.local_uri() + instance.uri()[6:])
    d_storage_name = aqsm.discussion_storage_name(discussion.id)
    v = get_virtuoso(instance.db, d_storage_name)
    cg = ConjunctiveGraph(v, d_storage_name)
    result = cg.triples((uri, None, None))
    #result = v.query('select ?p ?o ?g where {graph ?g {<%s> ?p ?o}}' % uri)
    # Something is wrong here.
    triples = '\n'.join([
        '%s %s %s.' % (uri.n3(), p.n3(), o.n3())
        for (s, p, o) in result
        if '_with_no_name_entry' not in o])
    return aqsm.quads_to_jsonld(triples)