def spec_to_node(self, current, spec):
n = None
message = ""
if spec == "ref":
n = reference()
elif spec == "current":
n = current
elif self.is_uuid4(spec):
n = Node.findById(spec)
if n is None:
message += "Node with id: " + spec + " does not exist"
else:
try:
nq = dict([ [nv[0].strip(), nv[1].strip() ] for nv in [nv.split("=") for nv in spec[spec.index("(")+1:spec.index(")")].strip().split(",")]])
except:
self.abort(400, "Unable to parse node defn")
n = Node.find(auth.get_tenant(), **nq)
if len(n) == 1:
n = n[0]
elif len(n) > 1:
n = None
message += "Could not find a unique node nodes with props: " + str(nq)
else:
n = None
message += "Could not find a node nodes with props: " + str(nq)
return (n, message)
def delete(self):
nodes = Node.findn(auth.get_tenant())
for n in nodes:
logging.info( "Deleting..." + str(n))
n.delete()
self.response.status = "204 OK"
def node_id_to_node(self, node_id):
n = None
msg = "Node with id: " + node_id + " does not exist"
if node_id == "ref":
n = reference()
elif node_id.startswith("Node"):
logging.info("trying spec..............")
n,msg = self.spec_to_node(None, node_id)
else:
n = Node.findById(node_id)
if n is None:
self.abort(404, msg)
return n
def get(self):
dump_indexes()
nodes = Node.findn(auth.get_tenant())
nodes_hash = { 'nodes': [] }
for n in nodes:
tref = { 'properties' : {} , 'node_link' : '/graphdb/' + n.id , 'node_id' : n.id}
for an,av in n.items():
tref['properties'][an] = av
tref['relationships'] = dict(outgoing=[], incoming=[])
for r in n.relationships.outgoing:
x = {}
for ran,rav in r.items():
x[ran] = rav
tref['relationships']['outgoing'].append( { 'link' : '/graphdb/' + r.end().id, 'type_name' : r.type.name(), 'properties' : x } )
for r in n.relationships.incoming:
x = {}
for ran,rav in r.items():
x[ran] = rav
tref['relationships']['incoming'].append( { 'link' : '/graphdb/' + r.start().id, 'type_name' : r.type.name(), 'properties' : x } )
nodes_hash['nodes'].append(tref)
self.response.status = "200 OK"
if self.request.headers['Accept'] == "application/json":
self.response.headers['Content-Type'] = "application/json"
self.response.out.write(json.dumps(nodes_hash))
else:
self.response.headers['Content-Type'] = "text/html"
template_values = nodes_hash
path = os.path.join(os.path.dirname(__file__), 'nodelist.html')
self.response.out.write(template.render(path, template_values))
from api.graph import Node
tenant='myblog'
jo4neo = Node.new(tenant, name="jo4neo")
welcome = Node.new(tenant, name="welcome")
summer = Node.new(tenant, name="Summer")
mark = Node.new(tenant, name="Mark")
post1 = Node.new(tenant, content="jo4neo makes it easy to provision a graph with data")
post1.relationships.outgoing.create("author", summer)
post1.relationships.outgoing.create("hasTag", jo4neo)
post2 = Node.new(tenant, content="jo4neo provides simple yet useful features")
post2.relationships.outgoing.create("author", mark)
post2.relationships.outgoing.create("hasTag", welcome)
post2.relationships.outgoing.create("hasTag", jo4neo)
c = 0
for r in post2.relationships.outgoing.hasTag:
c+=1
assert c == 2
def post(self, node_id):
logging.info("**thread " + threading.current_thread().name)
logging.info("**post data: " + str(self.request.POST))
current = self.node_id_to_node(node_id)
yaml_data = None
if self.request.headers['Content-Type'] == "application/yaml":
yaml_data = self.convert_to_yaml(self.request.body)
else:
if 'yaml' in self.request.POST:
yaml_data = self.convert_to_yaml(self.request.POST['yaml'])
elif 'delete' in self.request.POST:
return self.delete(node_id)
else:
self.abort(400, "Missing input (either submit a form field named yaml or post content-type application/yaml)")
pl = {}
rl = []
n = current
if 'node' in yaml_data and (yaml_data['node'] is not None) and 'properties' in yaml_data['node']:
pl = yaml_data['node']['properties']
for pli in pl:
if type(pl[pli]) != "str":
pl[pli] = str(pl[pli])
n = Node.new(auth.get_tenant(), **pl)
if 'relations' in yaml_data['node']:
rl = yaml_data['node']['relations']
elif 'relations' in yaml_data:
rl = yaml_data['relations']
elif 'properties' in yaml_data:
n.add_properties(yaml_data['properties'])
else:
self.abort(400, "Expecting node/properties or relations or properties in the POST payload")
for r in rl:
if not isinstance(r, dict):
self.abort(400, "Could not parse the relations!")
logging.info("**** Adding relation: " + r['type'])
rpl = r['properties'] if 'properties' in r else {}
logging.info(" ** relation properties: ")
for rpli in rpl:
if type(rpl[rpli]) != "str":
rpl[rpli] = str(rpl[rpli])
n1 = None
n2 = None
message = ""
if 'from' in r:
s = r['from']
n1, msg = self.spec_to_node(current, s)
message += msg
n2 = n
elif 'to' in r:
s = r['to']
n2, msg = self.spec_to_node(current, s)
message += msg
n1 = n
if n1 is not None and n2 is not None:
logging.info("n2 = " + str(n2))
n1.relationships.create(r['type'], n2, **rpl)
else:
self.abort(404, str(message))
self.response.headers['Content-Type'] = "application/json"
self.response.headers['Location'] = "/graphdb/" + str(n.id)
if self.request.headers['Content-Type'] == "application/yaml":
self.response.status = "201 Created"
else:
return self.get(n.id)
def reference():
return Node.ref(auth.get_tenant())
