问题
When playing around with JSON Neo4j response over REST API, i am trying to break my head to understand how to should i access a value returned, when my result is having one column and 2 rows . Each row in turn contains multiple nodes.
the query (gives me a travel plan) :
MATCH (a:LandMark {name:'Acharya College' }),(d:AirPort {name:'Frankfurt International Airport'})
MATCH p1 = allShortestPaths((a)-[:STOPS_AT*]-(d))
WITH p1, FILTER(j IN NODES(p1) WHERE(j in nodes(p1)) ) AS buses
RETURN buses
the response i understand is a nested array one, but i am unable to figure out which are the indexes to access the values.
the alert(JSON.stringify(data, null, 4)); gives:
{ "columns": [ "buses" ], "data": [ [ [ { "labels": "http://localhost:7474/db/data/node/23/labels", "outgoing_relationships": "http://localhost:7474/db/data/node/23/relationships/out", "data": { "name": "Acharya College" }, "all_typed_relationships": "http://localhost:7474/db/data/node/23/relationships/all/{-list|&|types}", "traverse": "http://localhost:7474/db/data/node/23/traverse/{returnType}", "self": "http://localhost:7474/db/data/node/23", "property": "http://localhost:7474/db/data/node/23/properties/{key}", "outgoing_typed_relationships": "http://localhost:7474/db/data/node/23/relationships/out/{-list|&|types}", "properties": "http://localhost:7474/db/data/node/23/properties", "incoming_relationships": "http://localhost:7474/db/data/node/23/relationships/in", "extensions": {}, "create_relationship": "http://localhost:7474/db/data/node/23/relationships", "paged_traverse": "http://localhost:7474/db/data/node/23/paged/traverse/{returnType}{?pageSize,leaseTime}", "all_relationships": "http://localhost:7474/db/data/node/23/relationships/all", "incoming_typed_relationships": "http://localhost:7474/db/data/node/23/relationships/in/{-list|&|types}", "metadata": { "id": 23, "labels": [ "LandMark" ] } }, { "labels": "http://localhost:7474/db/data/node/25/labels", "outgoing_relationships": "http://localhost:7474/db/data/node/25/relationships/out", "data": { "name": "Auto Rickshaw" }, "all_typed_relationships": "http://localhost:7474/db/data/node/25/relationships/all/{-list|&|types}", "traverse": "http://localhost:7474/db/data/node/25/traverse/{returnType}", "self": "http://localhost:7474/db/data/node/25", "property": "http://localhost:7474/db/data/node/25/properties/{key}", "outgoing_typed_relationships": "http://localhost:7474/db/data/node/25/relationships/out/{-list|&|types}", "properties": "http://localhost:7474/db/data/node/25/properties", "incoming_relationships": "http://localhost:7474/db/data/node/25/relationships/in", "extensions": {}, "create_relationship": "http://localhost:7474/db/data/node/25/relationships", "paged_traverse": "http://localhost:7474/db/data/node/25/paged/traverse/{returnType}{?pageSize,leaseTime}", "all_relationships": "http://localhost:7474/db/data/node/25/relationships/all", "incoming_typed_relationships": "http://localhost:7474/db/data/node/25/relationships/in/{-list|&|types}", "metadata": { "id": 25, "labels": [ "AutoRickShaw" ] } }, { "labels": "http://localhost:7474/db/data/node/0/labels", "outgoing_relationships": "http://localhost:7474/db/data/node/0/relationships/out", "data": { "name": "CST International Airport:Mumbai" }, "all_typed_relationships": "http://localhost:7474/db/data/node/0/relationships/all/{-list|&|types}", "traverse": "http://localhost:7474/db/data/node/0/traverse/{returnType}", "self": "http://localhost:7474/db/data/node/0", "property": "http://localhost:7474/db/data/node/0/properties/{key}", "outgoing_typed_relationships": "http://localhost:7474/db/data/node/0/relationships/out/{-list|&|types}", "properties": "http://localhost:7474/db/data/node/0/properties", "incoming_relationships": "http://localhost:7474/db/data/node/0/relationships/in", "extensions": {}, "create_relationship": "http://localhost:7474/db/data/node/0/relationships", "paged_traverse": "http://localhost:7474/db/data/node/0/paged/traverse/{returnType}{?pageSize,leaseTime}", "all_relationships": "http://localhost:7474/db/data/node/0/relationships/all", "incoming_typed_relationships": "http://localhost:7474/db/data/node/0/relationships/in/{-list|&|types}", "metadata": { "id": 0, "labels": [ "AirPort" ] } }, { "labels": "http://localhost:7474/db/data/node/3/labels", "outgoing_relationships": "http://localhost:7474/db/data/node/3/relationships/out", "data": { "FlightNo": "LF1131" }, "all_typed_relationships": "http://localhost:7474/db/data/node/3/relationships/all/{-list|&|types}", "traverse": "http://localhost:7474/db/data/node/3/traverse/{returnType}", "self": "http://localhost:7474/db/data/node/3", "property": "http://localhost:7474/db/data/node/3/properties/{key}", "outgoing_typed_relationships": "http://localhost:7474/db/data/node/3/relationships/out/{-list|&|types}", "properties": "http://localhost:7474/db/data/node/3/properties", "incoming_relationships": "http://localhost:7474/db/data/node/3/relationships/in", "extensions": {}, "create_relationship": "http://localhost:7474/db/data/node/3/relationships", "paged_traverse": "http://localhost:7474/db/data/node/3/paged/traverse/{returnType}{?pageSize,leaseTime}", "all_relationships": "http://localhost:7474/db/data/node/3/relationships/all", "incoming_typed_relationships": "http://localhost:7474/db/data/node/3/relationships/in/{-list|&|types}", "metadata": { "id": 3, "labels": [ "AirPlane" ] } }, { "labels": "http://localhost:7474/db/data/node/2/labels", "outgoing_relationships": "http://localhost:7474/db/data/node/2/relationships/out", "data": { "name": "Frankfurt International Airport" }, "all_typed_relationships": "http://localhost:7474/db/data/node/2/relationships/all/{-list|&|types}", "traverse": "http://localhost:7474/db/data/node/2/traverse/{returnType}", "self": "http://localhost:7474/db/data/node/2", "property": "http://localhost:7474/db/data/node/2/properties/{key}", "outgoing_typed_relationships": "http://localhost:7474/db/data/node/2/relationships/out/{-list|&|types}", "properties": "http://localhost:7474/db/data/node/2/properties", "incoming_relationships": "http://localhost:7474/db/data/node/2/relationships/in", "extensions": {}, "create_relationship": "http://localhost:7474/db/data/node/2/relationships", "paged_traverse": "http://localhost:7474/db/data/node/2/paged/traverse/{returnType}{?pageSize,leaseTime}", "all_relationships": "http://localhost:7474/db/data/node/2/relationships/all", "incoming_typed_relationships": "http://localhost:7474/db/data/node/2/relationships/in/{-list|&|types}", "metadata": { "id": 2, "labels": [ "AirPort" ] } } ] ], [ [ { "labels": "http://localhost:7474/db/data/node/23/labels", "outgoing_relationships": "http://localhost:7474/db/data/node/23/relationships/out", "data": { "name": "Acharya College" }, "all_typed_relationships": "http://localhost:7474/db/data/node/23/relationships/all/{-list|&|types}", "traverse": "http://localhost:7474/db/data/node/23/traverse/{returnType}", "self": "http://localhost:7474/db/data/node/23", "property": "http://localhost:7474/db/data/node/23/properties/{key}", "outgoing_typed_relationships": "http://localhost:7474/db/data/node/23/relationships/out/{-list|&|types}", "properties": "http://localhost:7474/db/data/node/23/properties", "incoming_relationships": "http://localhost:7474/db/data/node/23/relationships/in", "extensions": {}, "create_relationship": "http://localhost:7474/db/data/node/23/relationships", "paged_traverse": "http://localhost:7474/db/data/node/23/paged/traverse/{returnType}{?pageSize,leaseTime}", "all_relationships": "http://localhost:7474/db/data/node/23/relationships/all", "incoming_typed_relationships": "http://localhost:7474/db/data/node/23/relationships/in/{-list|&|types}", "metadata": { "id": 23, "labels": [ "LandMark" ] } }, { "labels": "http://localhost:7474/db/data/node/25/labels", "outgoing_relationships": "http://localhost:7474/db/data/node/25/relationships/out", "data": { "name": "Auto Rickshaw" }, "all_typed_relationships": "http://localhost:7474/db/data/node/25/relationships/all/{-list|&|types}", "traverse": "http://localhost:7474/db/data/node/25/traverse/{returnType}", "self": "http://localhost:7474/db/data/node/25", "property": "http://localhost:7474/db/data/node/25/properties/{key}", "outgoing_typed_relationships": "http://localhost:7474/db/data/node/25/relationships/out/{-list|&|types}", "properties": "http://localhost:7474/db/data/node/25/properties", "incoming_relationships": "http://localhost:7474/db/data/node/25/relationships/in", "extensions": {}, "create_relationship": "http://localhost:7474/db/data/node/25/relationships", "paged_traverse": "http://localhost:7474/db/data/node/25/paged/traverse/{returnType}{?pageSize,leaseTime}", "all_relationships": "http://localhost:7474/db/data/node/25/relationships/all", "incoming_typed_relationships": "http://localhost:7474/db/data/node/25/relationships/in/{-list|&|types}", "metadata": { "id": 25, "labels": [ "AutoRickShaw" ] } }, { "labels": "http://localhost:7474/db/data/node/0/labels", "outgoing_relationships": "http://localhost:7474/db/data/node/0/relationships/out", "data": { "name": "CST International Airport:Mumbai" }, "all_typed_relationships": "http://localhost:7474/db/data/node/0/relationships/all/{-list|&|types}", "traverse": "http://localhost:7474/db/data/node/0/traverse/{returnType}", "self": "http://localhost:7474/db/data/node/0", "property": "http://localhost:7474/db/data/node/0/properties/{key}", "outgoing_typed_relationships": "http://localhost:7474/db/data/node/0/relationships/out/{-list|&|types}", "properties": "http://localhost:7474/db/data/node/0/properties", "incoming_relationships": "http://localhost:7474/db/data/node/0/relationships/in", "extensions": {}, "create_relationship": "http://localhost:7474/db/data/node/0/relationships", "paged_traverse": "http://localhost:7474/db/data/node/0/paged/traverse/{returnType}{?pageSize,leaseTime}", "all_relationships": "http://localhost:7474/db/data/node/0/relationships/all", "incoming_typed_relationships": "http://localhost:7474/db/data/node/0/relationships/in/{-list|&|types}", "metadata": { "id": 0, "labels": [ "AirPort" ] } }, { "labels": "http://localhost:7474/db/data/node/3/labels", "outgoing_relationships": "http://localhost:7474/db/data/node/3/relationships/out", "data": { "FlightNo": "LF1131" }, "all_typed_relationships": "http://localhost:7474/db/data/node/3/relationships/all/{-list|&|types}", "traverse": "http://localhost:7474/db/data/node/3/traverse/{returnType}", "self": "http://localhost:7474/db/data/node/3", "property": "http://localhost:7474/db/data/node/3/properties/{key}", "outgoing_typed_relationships": "http://localhost:7474/db/data/node/3/relationships/out/{-list|&|types}", "properties": "http://localhost:7474/db/data/node/3/properties", "incoming_relationships": "http://localhost:7474/db/data/node/3/relationships/in", "extensions": {}, "create_relationship": "http://localhost:7474/db/data/node/3/relationships", "paged_traverse": "http://localhost:7474/db/data/node/3/paged/traverse/{returnType}{?pageSize,leaseTime}", "all_relationships": "http://localhost:7474/db/data/node/3/relationships/all", "incoming_typed_relationships": "http://localhost:7474/db/data/node/3/relationships/in/{-list|&|types}", "metadata": { "id": 3, "labels": [ "AirPlane" ] } }, { "labels": "http://localhost:7474/db/data/node/2/labels", "outgoing_relationships": "http://localhost:7474/db/data/node/2/relationships/out", "data": { "name": "Frankfurt International Airport" }, "all_typed_relationships": "http://localhost:7474/db/data/node/2/relationships/all/{-list|&|types}", "traverse": "http://localhost:7474/db/data/node/2/traverse/{returnType}", "self": "http://localhost:7474/db/data/node/2", "property": "http://localhost:7474/db/data/node/2/properties/{key}", "outgoing_typed_relationships": "http://localhost:7474/db/data/node/2/relationships/out/{-list|&|types}", "properties": "http://localhost:7474/db/data/node/2/properties", "incoming_relationships": "http://localhost:7474/db/data/node/2/relationships/in", "extensions": {}, "create_relationship": "http://localhost:7474/db/data/node/2/relationships", "paged_traverse": "http://localhost:7474/db/data/node/2/paged/traverse/{returnType}{?pageSize,leaseTime}", "all_relationships": "http://localhost:7474/db/data/node/2/relationships/all", "incoming_typed_relationships": "http://localhost:7474/db/data/node/2/relationships/in/{-list|&|types}", "metadata": { "id": 2, "labels": [ "AirPort" ] } } ] ] ]}
回答1:
How do you access it?
Check out this javascript snippet on http://neo4j.com/developer/javascript/#_using_the_http_endpoint_directly
var r=require("request");
var txUrl = "http://localhost:7474/db/data/transaction/commit";
function cypher(query,params,cb) {
r.post({uri:txUrl,
json:{statements:[{statement:query,parameters:params}]}},
function(err,res) { cb(err,res.body)})
}
// Running the Function
var query="MATCH (n:User) RETURN n, labels(n) as l LIMIT {limit}"
var params={limit: 10}
var cb=function(err,data) { console.log(JSON.stringify(data)) }
cypher(query,params,cb)
{"results":[
{"columns":["n","l"],
"data":[
{"row":[{"name":"Aran"},["User"]]}
]
}],
"errors":[]}
回答2:
I know you're using php and that your question is related to this one : Parsing a neo4j JSON object in javascript
Why don't you take advantage of the existing drivers that will remove you the burden of the response parsing.
Here is an example using neoclient :
composer require neoxygen/neoclient
--
$client = ClientBuilder::create()
->addDefaultLocalConnection()
->build();
// Sending your query :
$query = "MATCH (a:LandMark {name:'Acharya College' }),(d:AirPort {name:'Frankfurt International Airport'})
MATCH p1 = allShortestPaths((a)-[:STOPS_AT*]-(d))
WITH p1, FILTER(j IN NODES(p1) WHERE(j in nodes(p1)) ) AS buses
RETURN buses";
$result = $client->sendCypherQuery($query)->getResult();
// Getting the buses
$buses = $result->get('buses'); // Just specify the return alias desired
// Returns you a collection of buses
// Passing what you want to your frontend :
$response = [];
foreach ($buses as $bus) {
$response[] = [
'bus_name' => $bus->getProperty('name'),
'bus_id' => $bus->getProperty('id')
];
return json_encode($response);
And in your javascript you only need to iterate over the response ;-)
来源：https://stackoverflow.com/questions/28276803/json-object-parsing-multiple-rows-with-multiple-nodes-in-a-rest-api-neo4j-cyph