[rql] Store selected variables for RQL select queries in ResultSet (#17218476)
By storing the name of the selected variables for RQL select queries in the
ResultSet (within the "variables" attribute), the information can be passed
down to specific protocols, e.g. rqlio that may wish to pass is down further
to clients.
In turn, clients can then choose to present the results of RQL select queries
as symbolic bindings using the names used in the query's projection, instead of
ordinal arrays.
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# copyright 2014-2016 UNLISH S.A.S. (Montpellier, FRANCE), all rights reserved.
#
# contact http://www.logilab.fr/ -- mailto:contact@logilab.fr
#
# This file is part of CubicWeb.
#
# CubicWeb is free software: you can redistribute it and/or modify it under the
# terms of the GNU Lesser General Public License as published by the Free
# Software Foundation, either version 2.1 of the License, or (at your option)
# any later version.
#
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# FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more
# details.
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# You should have received a copy of the GNU Lesser General Public License along
# with CubicWeb. If not, see <http://www.gnu.org/licenses/>.
from pyramid.httpexceptions import HTTPNotFound
from cubicweb import rdf
def negociate_mime_type(request, possible_mimetypes):
accepted_headers_by_weight = sorted(
request.accept.parsed or [], key=lambda h: h[1], reverse=True
)
mime_type_negociated = None
for parsed_header in accepted_headers_by_weight:
accepted_mime_type = parsed_header[0]
if accepted_mime_type in possible_mimetypes:
mime_type_negociated = accepted_mime_type
break
return mime_type_negociated
def rdf_context_from_eid(request):
mime_type = negociate_mime_type(request, rdf.RDF_MIMETYPE_TO_FORMAT)
if mime_type is None:
raise HTTPNotFound()
entity = request.cw_request.entity_from_eid(request.matchdict['eid'])
return RDFResource(entity, mime_type)
class RDFResource:
def __init__(self, entity, mime_type):
self.entity = entity
self.mime_type = mime_type