Hi Michael Thanks for this it's good to hear how it works. However, it sounds like correct behaviour has been traded for implementation. I assume streaming is used because a client might issue a high number of statements?
Is this behaviour documented anywhere? If not I'll knock up a blog post. Thanks Paul On 24 December 2013 22:17, Michael Hunger <[email protected]> wrote: > Hi Paul, > > in this endpoint data is streamed from and to the server. > > So that the headers for the response are sent immediately, before any query > is executed. Then the query results are pulled through lazily and sent to the > client. > > At any stage errors can happen, parsing, starting the execution or returning > results (imagine division by zero in the last row of your results). > Also this endpoint can consume multiple statements, so the first x might be > successful and already stream back data to the client and only the last one > might fail. Which is the reported in the errors block. > > That's why the request doesn't fail as such but errors are returned. As we > never know if there will be any errors when processing the statements and > streaming back results or not, so we cannot hold off sending the headers to > the client > before the queries are actually parsed, run and fetched through. > > > HTH > > Michael > > Am 24.12.2013 um 12:27 schrieb Paul Grenyer <[email protected]>: > >> Hi >> >> This is my first post and a continuation of a discussion with the >> @neo4j account on twitter. >> >> Having read this web page: >> >> http://docs.neo4j.org/chunked/milestone/rest-api-transactional.html >> >> I constructed the body of a REST POST to >> http://<myserver>/db/data/transaction/<tx> like this: >> >> { >> "statements":[{ >> "statement":"MATCH (u:User{username:{username}}), (r:Role >> name:{rolename}})\nCREATE(u)-[:HAS_ROLE]-\u003e(r)", >> "parameters":{ >> "props":{ >> "username":"user1","rolename":"ROLE_REST_USER" >> } >> } >> }] >> } >> >> I received no error code back from Neo4j by way of the POST. When my >> update wasn't applied to the database I had to look at the response >> message to see the problem: >> >> { >> "commit":"http://localhost:7474/db/data/transaction/32/commit";, >> "results":[], >> "transaction":{"expires":"Tue,24 Dec 2013 11:16:17+0000"}, >> "errors":[{ >> "code":"Neo.ClientError.Statement.ParameterMissing", >> "message":"Expected a parameter named username" >> }] >> } >> >> With a little bit of guess work I figured that the 'props' element >> under 'parameters' wasn't required, rejigged the JSON and it worked. >> >> However, I'm left thinking that: >> >> 1. The documentation at the above link may need correcting (or perhaps >> I'm just being dumb and missing something). >> 2. The POST should have returned an error code. >> >> What do you guys think? >> >> >> -- >> Thanks >> Paul >> >> Paul Grenyer >> e: [email protected] >> b: paulgrenyer.blogspot.com >> t: pjgrenyer >> >> Have you thought what Naked Element could do for you? >> http://nakedelement.co.uk/ >> >> It's time to get technical: http://norfolkdevelopers.com >> >> Norfolk Developers Conference is coming: http://nordevcon.com/ >> >> Enjoyed working with me? Something I could work on? Give me honest, >> anonymous feedback: https://www.get3sixty.com/:wehop >> >> -- >> You received this message because you are subscribed to the Google Groups >> "Neo4j" group. >> To unsubscribe from this group and stop receiving emails from it, send an >> email to [email protected]. >> For more options, visit https://groups.google.com/groups/opt_out. > > -- > You received this message because you are subscribed to the Google Groups > "Neo4j" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to [email protected]. > For more options, visit https://groups.google.com/groups/opt_out. -- Thanks Paul Paul Grenyer e: [email protected] b: paulgrenyer.blogspot.com t: pjgrenyer Have you thought what Naked Element could do for you? http://nakedelement.co.uk/ It's time to get technical: http://norfolkdevelopers.com Norfolk Developers Conference is coming: http://nordevcon.com/ Enjoyed working with me? Something I could work on? Give me honest, anonymous feedback: https://www.get3sixty.com/:wehop -- You received this message because you are subscribed to the Google Groups "Neo4j" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. For more options, visit https://groups.google.com/groups/opt_out.
