Extending the REST API every time you want to do constraint controlled Document Create, Update, Deletes seems like a fair amount of extra work. If this is the approach then I guess I can look at it.
I was just thinking that perhaps something along the lines of would be availible: /documents&query=XQuery&bind:x=X&bind:y=Y Update /documents using the adhoc XQuery with a set of variable bindings. Where these bindings could be the XML for the doc and params. I guess I need to look at extensions. Thanks for the pointer re fn:exists(). -----Original Message----- From: [email protected] on behalf of Michael Blakeley Sent: Mon 19/11/2012 4:41 PM To: MarkLogic Developer Discussion Subject: Re: [MarkLogic Dev General] Marklogic REST API. [Multi-statement tx] Jem, why not extend the REST API to implement that as a single request? That should give you the benefits of using the REST API, without requiring multiple requests. http://docs.marklogic.com/guide/rest-dev/extensions discusses this feature and has an example that you could modify to suit your application. BTW in your sample code below I would probably use fn:exists() rather than xdmp:exists(). You are using that boolean to decide whether or not to update the database. Therefore you probably want ACID consistency guarantees, which xdmp:exists explicitly avoids in its subexpression because it always runs timestamped. Replacing it with fn:exists(doc($documentUri)) will read-lock any document at $documentUri, which guarantees consistency and avoids a potential race condition. -- Mike On 19 Nov 2012, at 07:59 , Jem Rayfield <[email protected]> wrote: > Hi, > > Would I be correct that the following type of XQuery should be translated to > a sequence of REST calls using a tx-id. > So, a single simple XQuery update such as: > > if (xdmp:exists(doc($documentUri))) > then ( > if ($timeCode < xs:dateTime(doc($documentUri)/document/header/timeStamp) ) > then () > else ( > xdmp:document-insert($documentUri, xdmp:unquote($xml), > xdmp:default-permissions(), local:getCollections()) > ) > )else ( > xdmp:document-insert($documentUri, xdmp:unquote($xml), > xdmp:default-permissions(), local:getCollections()) > ) > > Would be translated to a number of REST calls: > > Get a transaction; /transactions > Invoke XQuery to get time stamp using the tx id; /query > Update Document using the tx id; /documents > > Or is there a better way of doing this using the current REST API spec? > There could be a lot of I/O etc for something quite simple. > > I may have missed something here so please do point me in the right direction. > > Cheers > Jem > > > > http://www.bbc.co.uk > This e-mail (and any attachments) is confidential and may contain personal > views which are not the views of the BBC unless specifically stated. > If you have received it in error, please delete it from your system. > Do not use, copy or disclose the information in any way nor act in reliance > on it and notify the sender immediately. > Please note that the BBC monitors e-mails sent or received. > Further communication will signify your consent to this. > _______________________________________________ > General mailing list > [email protected] > http://developer.marklogic.com/mailman/listinfo/general _______________________________________________ General mailing list [email protected] http://developer.marklogic.com/mailman/listinfo/general http://www.bbc.co.uk/ This e-mail (and any attachments) is confidential and may contain personal views which are not the views of the BBC unless specifically stated. If you have received it in error, please delete it from your system. Do not use, copy or disclose the information in any way nor act in reliance on it and notify the sender immediately. Please note that the BBC monitors e-mails sent or received. Further communication will signify your consent to this.
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