def filter_instances(query_params):
if not class_exists(query_params):
error_message = u"Class {0} in graph {1} does not exist".format(
query_params["class_uri"], query_params["graph_uri"])
raise HTTPError(404, log_message=error_message)
keymap = {
"label": "title",
"subject": "@id",
"sort_object": shorten_uri(query_params["sort_by"]),
}
for p, o, index in extract_po_tuples(query_params):
keymap[o[1:]] = shorten_uri(p)
result_dict = query_filter_instances(query_params)
if not result_dict or not result_dict['results']['bindings']:
return None
items_list = compress_keys_and_values(
result_dict,
keymap=keymap,
ignore_keys=["total"],
do_expand_uri=query_params['expand_uri'] == u"1")
items_list = merge_by_id(items_list)
for item in items_list:
uri = item["@id"]
item["instance_prefix"] = u"{0}/".format(uri.rsplit('/', 1)[0])
item["class_prefix"] = expand_uri(query_params['class_prefix'])
decorate_with_resource_id(items_list)
return build_json(items_list, query_params)
def assemble_list_json(query_params, query_result_dict):
context = MemorizeContext()
expand_uri = bool(int(query_params.get('expand_uri', '0')))
items_list = compress_keys_and_values(
query_result_dict,
keymap={"class": "@id", "label": "title"},
context=context,
expand_uri=expand_uri)
items_list = compress_duplicated_ids(items_list)
decorate_with_resource_id(items_list)
decorate_with_class_prefix(items_list)
context_section = context.context
context_section.update({"@language": query_params.get("lang")})
json_dict = {
'_base_url': remove_last_slash(query_params.base_url),
'items': items_list,
'@context': context_section,
'@id': query_params['graph_uri']
}
def calculate_total_items():
count_query_result_dict = query_count_classes(query_params)
total_items = int(get_one_value(count_query_result_dict, "total_items"))
return total_items
decorate_dict_with_pagination(json_dict, query_params, calculate_total_items)
return json_dict
def test_query(self):
expected_classes = [{
u'class': u'http://example.onto/PlaceWithoutLanguage',
u'label': u'Place'
}, {
u'class': u'http://example.onto/Lugar',
u'label': u'Lugar'
}, {
u'class': u'http://example.onto/Place',
u'label': u'Lugar'
}, {
u'class': u'http://example.onto/City',
u'label': u'Cidade'
}]
query_params = Params({
"graph_uri":
self.graph_uri,
"lang":
"pt",
"page":
0,
"per_page":
10,
'lang_filter_label':
'\n FILTER(langMatches(lang(?label), "pt") OR langMatches(lang(?label), "")) .\n'
})
response = get_context.query_classes_list(query_params)
compressed_response = compress_keys_and_values(response)
self.assertItemsEqual(expected_classes, compressed_response)
def test_query(self):
expected_classes = [
{u'class': u'http://example.onto/PlaceWithoutLanguage', u'label': u'Place'},
{u'class': u'http://example.onto/Lugar', u'label': u'Lugar'},
{u'class': u'http://example.onto/Place', u'label': u'Lugar'},
{u'class': u'http://example.onto/City', u'label': u'Cidade'}]
query_params = Params({
"graph_uri": self.graph_uri,
"lang": "pt",
"page": 0,
"per_page": 10,
'lang_filter_label': '\n FILTER(langMatches(lang(?label), "pt") OR langMatches(lang(?label), "")) .\n'
})
response = get_context.query_classes_list(query_params)
compressed_response = compress_keys_and_values(response)
self.assertItemsEqual(expected_classes, compressed_response)
def execute_query(query_id, stored_query, querystring_params):
query = get_query(stored_query, querystring_params)
# TODO extract_method?
request_dict = copy.copy(querystring_params.triplestore_config)
request_dict.update({"query_id": query_id})
request_dict.update({"query": query})
log.logger.info(QUERY_EXECUTION_LOG_FORMAT.format(**request_dict))
result_dict = query_sparql(query,
querystring_params.triplestore_config)
items = compress_keys_and_values(result_dict)
if not items:
message = NO_RESULTS_MESSAGE_FORMAT.format(querystring_params.triplestore_config["url"], query)
return {
"items": [],
# TODO explain in which instance of Virtuoso the query was executed?
"warning": message}
return {"items": items}
def execute_query(query_id, stored_query, querystring_params):
query = get_query(stored_query, querystring_params)
# TODO extract_method?
request_dict = copy.copy(querystring_params.triplestore_config)
request_dict.update({"query_id": query_id})
request_dict.update({"query": query})
log.logger.info(QUERY_EXECUTION_LOG_FORMAT.format(**request_dict))
result_dict = query_sparql(query, querystring_params.triplestore_config)
items = compress_keys_and_values(result_dict)
if not items:
message = NO_RESULTS_MESSAGE_FORMAT.format(
querystring_params.triplestore_config["url"], query)
return {
"items": [],
# TODO explain in which instance of Virtuoso the query was executed?
"warning": message
}
return {"items": items}
def filter_instances(query_params):
if not class_exists(query_params):
error_message = u"Class {0} in graph {1} does not exist".format(
query_params["class_uri"], query_params["graph_uri"])
raise HTTPError(404, log_message=error_message)
keymap = {
"label": "title",
"subject": "@id",
"sort_object": shorten_uri(query_params["sort_by"]),
}
for p, o, index in extract_po_tuples(query_params):
keymap[o[1:]] = shorten_uri(p)
result_dict = query_filter_instances(query_params)
if not result_dict or not result_dict['results']['bindings']:
return None
items_list = compress_keys_and_values(result_dict, keymap=keymap, ignore_keys=["total"])
items_list = merge_by_id(items_list)
add_prefix(items_list, query_params['class_prefix'])
decorate_with_resource_id(items_list)
return build_json(items_list, query_params)