php - PDO bind array index (postgresql JSONB) for reading -


i'm storing array of objects in postgresql jsonb column, i'm tring load property of nth's object fails bind pdo.

test setup

<?php error_reporting(e_all); ini_set('display_errors',1);  $db = new pdo('...');       $db->exec('create table public.test (id serial primary key, jb jsonb not null )');      $insert = $db->prepare('insert public.test(jb) values (?)');      $insert->execute([json_encode([                                      'q' => 'qst1'                                      , 'a' => [['txt' => 'ans1', 'iscorrect' => true], ['txt' => 'ans2', 'iscorrect' => false], ['txt' => 'ans3', 'iscorrect' => false], ['txt' => 'ans4', 'iscorrect' => false]]                                  ], json_numeric_check)]);

if read whole array can check

$allanswers = $db->prepare("select jb->'a' public.test id=?"); $allanswers->execute([1]); $result  = json_decode($allanswers->fetchcolumn(),true); foreach ([0,1,2,3,17] $answerid) {     if (!array_key_exists($answerid,$result) ) {         echo $answerid,':','null',"\n";     }     else {         $r = $result[$answerid]['iscorrect'];         echo $answerid,':',($r?'true':'false'),"\n";     } }

but if need nths don't know how bind (i'm not getting error null values)

$answeriscorrect = $db->prepare("select jb->'a'->?->>'iscorrect' public.test id = ?"); foreach ([0,1,2,3,17] $answerid) {     $succ = $answeriscorrect->execute([$answerid, 1]);     if (true !== $succ) {         die('execute failed');     }     $result = $answeriscorrect->fetchcolumn();     echo $answerid,':',is_null($result)?'null':('true'===$result?'true':'false'),"\n"; }

current output

0:null 1:null 2:null 3:null 17:null

excepted output

0:true 1:false 2:false 3:false 17:null

finnaly found it

$answeriscorrect = $db->prepare("select jsonb_extract_path(jb->'a',?)->>'iscorrect' public.test id = ?");

instead of

$answeriscorrect = $db->prepare("select jb->'a'->?->>'iscorrect' public.test id = ?");

worked


Comments

Post a Comment

Popular posts from this blog

asynchronous - C# WinSCP .NET assembly: How to upload multiple files asynchronously -

i using winscp .net assembly uploading files. want upload multiple files asynchronous way. have created method works single upload. public class uploadingdata { private sessionoptions _sessionoptions; private session _session; //connection etc private void onconnected() { foreach (var fileinfo in localfileslist) { var task = task.factory.startnew(() => uploadfilesasync(fileinfo)); } } private async task uploadfilesasync(string file) { string remotefilepath = _session.translatelocalpathtoremote(file, @"/", "/test_data_upload"); var uploading = _session.putfiles(file, remotefilepath, false); //when done await task.run(() => thread.sleep(1000)); } } please suggest me correct way. thanks you can use backgroundworker class this: string[] images = new string[50]; foreach (var path in images) { backgroundworker
Read more

aws api gateway - SerializationException in posting new Records via Dynamodb Proxy Service in API -

i getting "__type": "com.amazon.coral.service#serializationexception" as reply in postman & in test console in api gateway trying post record directly dynamodb using api proxy services.. referring aws article - https://aws.amazon.com/blogs/compute/using-amazon-api-gateway-as-a-proxy-for-dynamodb/ here's mapping { "tablename": "tablenamegoeshere", "item": { "id" : "$context.requestid" "eventname" : "$input.path('$.eventname')", "timestamp" : $input.path('$.timestamp'), "answers": "$util.parsejson($input.path('$.answers'))" } } update: did asked ... , worked if try add array of json objects gives me above same error - here's trying now. please - couldnt find on google well #set($inputroot = $input.path('$')) { "tablename": "answer", "item": {
Read more

asp.net - Problems sending emails from forum -

i have been redesigning site has message board, has been written guy looked after site. it has few problems , written in .asp , uses .mdb files database. you can see whole thing here . feel free post if helps, test thing have set using original files , new database. the basic problem when posts message, supposed email sent them, have posted it. when replies, originator supposed message, replier has been posted. i’d have thought @ point in process there should script/file in postmessage.asp? the postmessage.asp page below. <% option explicit %> <!-- #include virtual="common/adovbs.inc" --> <html> <head> <meta http-equiv="content-type" content="text/html; charset=windows-1252"> <meta name="generator" content="microsoft frontpage 4.0"> <meta name="progid" content="frontpage.editor.document"> <title>new page 2</title> <base target="_self"
Read more