{"id":1033,"date":"2022-08-30T15:11:16","date_gmt":"2022-08-30T15:11:16","guid":{"rendered":"https:\/\/unknownerror.org\/index.php\/2013\/11\/09\/datatables-typeerror-adata-is-undefined-collection-of-common-programming-errors\/"},"modified":"2022-08-30T15:11:16","modified_gmt":"2022-08-30T15:11:16","slug":"datatables-typeerror-adata-is-undefined-collection-of-common-programming-errors","status":"publish","type":"post","link":"https:\/\/unknownerror.org\/index.php\/2022\/08\/30\/datatables-typeerror-adata-is-undefined-collection-of-common-programming-errors\/","title":{"rendered":"Datatables TypeError: aData is undefined-Collection of common programming errors"},"content":{"rendered":"

I want to populate datatables with database values in a table. Below is my code listing, everything seems to be ok but an error is returned “TypeError: aData is undefined” so datatables is not created<\/p>\n

\n$(document).ready(function() {\n    $('#listax').dataTable({\n        \"bProcessing\": true,\n        \"bLengthChange\": true,\n        \"bFilter\": true,\n        \"bSort\": true,\n        \"bInfo\": true,\n        \"bAutoWidth\": true,\n        \"bServerSide\": true,\n        \"sServerMethod\": \"POST\",\n        \"sAjaxSource\": \"ajax_live\/getUsers\",\n        \"aoColumns\": [\n            null,\n            null \/\/put as many null values as your columns\n        ]\n    });\n});\n\n\n<\/code><\/pre>\n<\/table>\n
Server side<\/p>\n
 function getUsers(){\n     $this->db->select('id,username');\n     $query = $this->db->get('user');\n     $data = $query->result();\n     echo json_encode($data); \n }\n<\/code><\/pre>\n
This is the data returned by json encode<\/p>\n
[\n    {\"id\":\"6\",\"username\":\"Lab23\"},\n    {\"id\":\"11\",\"username\":\"MaryMM\"}\n]\n<\/code><\/pre>\n
    \n
  1. \n
    When I have done this I have had to define the columns. Example array being sent back;<\/p>\n
    Array\n(\n    [0] => stdClass Object\n        (\n            [id] => 6\n            [username] => \"Lab23\"\n        )\n    [1] => stdClass Object\n        (\n            [id] => 11\n            [username] => \"MaryMM\"\n        )\n)\n<\/code><\/pre>\n
    So if your json encoded array has key values of id<\/strong> and username<\/strong> the datatables would have the following segment in it.<\/p>\n
    $(document).ready(function() {\n    $('#listax').dataTable({\n        \"bProcessing\": true,\n        \"bLengthChange\": true,\n        \"bFilter\": true,\n        \"bSort\": true,\n        \"bInfo\": true,\n        \"bAutoWidth\": true,\n        \"bServerSide\": true,\n        \"sServerMethod\": \"POST\",\n        \"sAjaxSource\": \"ajax_live\/getUsers\",\n        \"aoColumns\":[\n            {\"mDataProp\":\"id\"},\n            {\"mDataProp\":\"username\"}\n        ]\n    });\n});\n<\/code><\/pre>\n<\/li>\n<\/ol>\n
    Originally posted 2013-11-09 23:16:38. <\/small><\/p>","protected":false},"excerpt":{"rendered":"
    I want to populate datatables with database values in a table. Below is my code listing, everything seems to be ok but an error is returned “TypeError: aData is undefined” so datatables is not created $(document).ready(function() { $(‘#listax’).dataTable({ “bProcessing”: true, “bLengthChange”: true, “bFilter”: true, “bSort”: true, “bInfo”: true, “bAutoWidth”: true, “bServerSide”: true, “sServerMethod”: “POST”, “sAjaxSource”: […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-1033","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"_links":{"self":[{"href":"https:\/\/unknownerror.org\/index.php\/wp-json\/wp\/v2\/posts\/1033","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/unknownerror.org\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/unknownerror.org\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/unknownerror.org\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/unknownerror.org\/index.php\/wp-json\/wp\/v2\/comments?post=1033"}],"version-history":[{"count":0,"href":"https:\/\/unknownerror.org\/index.php\/wp-json\/wp\/v2\/posts\/1033\/revisions"}],"wp:attachment":[{"href":"https:\/\/unknownerror.org\/index.php\/wp-json\/wp\/v2\/media?parent=1033"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/unknownerror.org\/index.php\/wp-json\/wp\/v2\/categories?post=1033"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/unknownerror.org\/index.php\/wp-json\/wp\/v2\/tags?post=1033"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}