def paths(id):
collection = obj_or_404(Collection.by_id(id))
authz.require(authz.collection_read(collection.id))
start_entity_id = request.args.get('entity_id')
labels = request.args.getlist('label')
types = request.args.getlist('type')
collection_id = request.args.getlist('collection_id')
end_collection_id = authz.collections_intersect(authz.READ, collection_id)
q = Path.find(collection, start_entity_id=start_entity_id, labels=labels,
types=types, end_collection_id=end_collection_id)
data = Pager(q, id=collection.id).to_dict()
data['facets'] = Path.facets(collection, start_entity_id=start_entity_id,
labels=labels, types=types,
end_collection_id=end_collection_id,
collection_id=authz.collections(authz.READ))
return jsonify(data)
def generate_paths(graph, entity, ignore_types=SKIP_TYPES):
"""Generate all possible paths which end in a different collection."""
Path.delete_by_entity(entity.id)
if graph is None or entity.state != entity.STATE_ACTIVE:
return
log.info("Generating graph path cache: %r", entity)
# TODO: should max path length be configurable?
q = "MATCH pth = (start:Aleph:Entity)-[*1..3]-(end:Aleph:Entity) " \
"MATCH (start)-[startpart:PART_OF]->(startcoll:Collection) " \
"MATCH (end)-[endpart:PART_OF]->(endcoll:Collection) " \
"WHERE start.fingerprint = {entity_fp} AND " \
"startpart.alephCanonical = {entity_id} AND " \
"startcoll.alephCollection <> endcoll.alephCollection AND " \
"all(r IN relationships(pth) WHERE NOT type(r) IN {ignore_types}) " \
"WITH DISTINCT start, end, " \
" COLLECT(DISTINCT extract(x IN nodes(pth) | x.id)) AS paths, " \
" COLLECT(DISTINCT extract(x IN nodes(pth) | labels(x))) AS labels, " \
" COLLECT(DISTINCT extract(r IN relationships(pth) | type(r))) AS types, " \
" COLLECT(DISTINCT endcoll.alephCollection) AS end_collection_id " \
"RETURN start, end, paths, types, labels, end_collection_id "
count = 0
for row in graph.run(q,
entity_id=entity.id,
entity_fp=entity.fingerprint,
ignore_types=ignore_types):
labels = unwind(row.get('labels'))
labels = [l for l in labels if l != BASE_NODE]
types = unwind(row.get('types'))
if len(types) == 1 and 'AKA' in types:
continue
Path.from_data(entity, row.get('end_collection_id'), row.get('paths'),
types, labels, NodeType.dict(row.get('start')),
NodeType.dict(row.get('end')))
count += 1
db.session.commit()
# TODO: send email to collection owners?
log.info("Generated %s paths for %r", count, entity)
def delete_paths(entity_id):
"""Delete the paths based on this entity."""
Path.delete_by_entity(entity_id)
db.session.commit()