Using Cypher (Neo4j) within a REST API request (Objective C) - json

Question

I am trying to query my Neo4j database, using the REST API.
I have this working so far without using the Cypher query language to retrieve data,
however, now I need to get nodes which are sorted by 'newest' i.e. unix timestamp DESC.
I have tried to add the query within the HTTP body of the NSMutableURLRequest but I am just getting the HTTP error 405.
Here is my code:
NSURL *url = [NSURL URLWithString:[NSString stringWithFormat:#"%#node/%i", EventsManagerDataURL, creatorID]];
NSLog(#"Connecting to URL: %#", url);
NSMutableURLRequest *request = [[NSMutableURLRequest alloc] initWithURL:url];
NSString *jsonMap = #"{'query' : 'start x = node(4,6,7) return x order by x.datestart,'params' : {}}";
NSData *jsonData = [jsonMap dataUsingEncoding:NSUTF8StringEncoding];
[request setHTTPMethod:#"POST"];
[request setValue:#"application/json" forHTTPHeaderField:#"Accept"];
[request setValue:#"application/json" forHTTPHeaderField:#"Content-Type"];
[request setValue:[NSString stringWithFormat:#"%d", jsonData.length] forHTTPHeaderField:#"Content-Length"];
[request setHTTPBody:jsonData];
[NSURLConnection sendAsynchronousRequest:request queue:[[NSOperationQueue alloc] init] completionHandler:^(NSURLResponse *response, NSData *data, NSError *error){
if (data){
NSLog(#"%s. Data: %#", _cmd, [[NSString alloc] initWithData:data encoding:NSUTF8StringEncoding]);
} else {
NSLog(#"Error: %#", error.localizedDescription);
}
}];

Answer 1

You're missing a single quote here:
NSString *jsonMap = #"{'query' : 'start x = node(4,6,7) return x order by x.datestart***'***,'params' : {}}";
And actually, it needs to have double quotes:
NSString *jsonMap = #"{\"query\" : \"start x = node(4,6,7) return x order by x.datestart\", \"params\" : {}}";
Test with cURL:
curl -H Accept:application/json -H Content-Type:application/json -X POST -d '{"query" : "start x = node(4,6,7) return x order by x.datestart", "params" : {}}' localhost:7474/db/data/cypher