我以前一直在使用数据表，但这是我第一次遇到此类错误。
我有错误：
Message: Undefined index: order
Message: Undefined index: start
Message: Undefined index: length
Message: Call to a member function result_array() on boolean
Line: 253
（我只是将错误简化）
我的Ajax代码：
var dataTable = $('#table-grid').DataTable({ // *** This is for Data Table
"processing": true,
"serverSide": true,
columnDefs: [
{ orderable: false, targets: [6,5]},
{ class: "text-center", targets: [5,6]},
],
"ajax":{
url :base_url+"LandClient/view_properties", // json datasource
type: "post", // method , by default get
data: {'email': $('#email').val()},
error: function(){ // error handling
$(".table-grid-error").html("");
$("#table-grid").append('<tbody class="table-grid-error"><tr><th colspan="5">No data found in the server</th></tr></tbody>');
$("#table-grid_processing").css("display","none");
}
}
});
我的控制器：
public function view_properties(){
$email = $this->session->userdata('login_email');
generate_json($this->LandClientModel->view_properties($email));
}
我的模特：
public function view_properties($email){
// storing request (ie, get/post) global array to a variable
$requestData= $_REQUEST;
$columns = array(
// datatable column index => database column name for sorting
0 => 'pr.date_created',
1 => 'dc.tdn_no',
2 => 'oct.orig_cert_no,tct.orig_cert_no',
3 => 'tct_no',
4 => 'owner_name',
5 => 'pr.status',
);
// getting total number records without any search
$sql = "SELECT *,oct.orig_cert_no as oct1, tct.orig_cert_no as oct2 FROM land_property pr
LEFT JOIN land_property_orig_title oct ON pr.prop_id = oct.prop_id
LEFT JOIN land_property_transfer_title tct ON pr.prop_id = tct.prop_id
LEFT JOIN land_property_declaration dc ON pr.prop_id = dc.prop_id
WHERE pr.email = ? ";
$params = array($email);
$query = $this->db->query($sql, $params);
$totalData = $query->num_rows();
$totalFiltered = $totalData; // when there is no search parameter then total number rows = total number filtered rows.
if( !empty($requestData['columns'][0]['search']['value']) ) //email address
{
$sql.=" AND tdn_no LIKE '%". $this->db->escape_like_str(sanitize($requestData['columns'][0]['search']['value']))."%' ";
}
if( !empty($requestData['columns'][1]['search']['value']) ) //email address
{
$sql.=" AND oct.orig_cert_no LIKE '%". $this->db->escape_like_str(sanitize($requestData['columns'][1]['search']['value']))."%' OR tct.orig_cert_no LIKE '%". $this->db->escape_like_str(sanitize($requestData['columns'][1]['search']['value']))."%' ";
}
if( !empty($requestData['columns'][2]['search']['value']) ) //email address
{
$sql.=" AND owner_name LIKE '%". $this->db->escape_like_str(sanitize($requestData['columns'][2]['search']['value']))."%' ";
}
if( !empty($requestData['columns'][3]['search']['value']) ) //email address
{
$sql.=" AND tct_no LIKE '%". $this->db->escape_like_str(sanitize($requestData['columns'][3]['search']['value']))."%' ";
}
$query = $this->db->query($sql, $params);
$totalFiltered = $query->num_rows(); // when there is a search parameter then we have to modify total number filtered rows as per search result.
$sql.=" ORDER BY ". $columns[$requestData['order'][0]['column']]." ".$requestData['order'][0]['dir']." LIMIT ".$requestData['start']." ,".$requestData['length']." "; // adding length
$query = $this->db->query($sql, $params);
$data = array();
foreach( $query->result_array() as $row ) { // preparing an array for table tbody
$nestedData=array();
// $nestedData[] = $row["date_created"];
if($row['tdn_no']==''){
$tdn = "<h1>-</h1>";
} else {
$tdn = $row['tdn_no'];
}
$nestedData[] = $tdn;
if($row['oct1']!=""){
$nestedData[] = $row["oct1"];
} else {
$nestedData[] = $row["oct2"];
}
$nestedData[] = $row["tct_no"]==""?"-":$row["tct_no"];
$nestedData[] = $row["owner_name"];
if($row["status"] == 4){
$status = "<span class='badge badge-danger tbl-badge'>Hold</span>";
}
elseif($row["status"] == 1){
$status = "<span class='badge badge-success tbl-badge'>Assessed</span>";
}
elseif($row["status"] == 2){
$status = "<span class='badge badge-warning tbl-badge'>For Assessment</span>";
}
$nestedData[] = $status;
$nestedData[] = $row["status"];
$nestedData[] = '<button class="btn btn-primary btnView btnView-1 btn-cus" > View</button> ';
$data[] = $nestedData;
}
$json_data = array(
"recordsTotal" => intval( $totalData ), // total number of records
"recordsFiltered" => intval( $totalFiltered ), // total number of records after searching, if there is no searching then totalFiltered = totalData
"data" => $data, // total data array
);
return $json_data;
}
顺便说一句，第253行是
$sql.=" ORDER BY ". $columns[$requestData['order'][0]['column']]." ".$requestData['order'][0]['dir']." LIMIT ".$requestData['start']." ,".$requestData['length']." "; // adding length
答案 0 :(得分：0)
在您显示的代码中唯一使用result_array的是这一行
foreach( $query->result_array() as $row )
对我来说，这意味着错误是“您正在尝试将布尔值$query用作具有成员函数的对象。”
看来这行
$query = $this->db->query($sql, $params);
将false的值分配给$query。我们知道它是false，因为对于“读取”语句，query()将在成功时返回数据库结果对象，或者在查询失败时返回FALSE。 （注意：“成功”并不意味着有任何行，只是说事情没有崩溃。）
这只是说您的查询语句不起作用的一种漫长的方法。
基于“未定义的索引”错误，我最好的猜测是您正试图从$requestData获取不存在的项目。这些似乎是用于设置ORDER BY子句的子句； $requestData['order']，$requestData['start']和$requestData['length']。
我认为您最好使用输入类方法post_get() documentation（或get_post()）而不是复制$_REQUEST。我不清楚您要尝试访问的各种索引是什么，因此我无法提供有关如何使用get_post()的清晰示例。
问题的一部分可能是试图以一种旧的方式构建查询字符串-根据级联条件连接字符串。此用例正是Query Builder的用途。
答案 1 :(得分：0)
首先检查像这样使用isset函数设置或不设置的变量或kay
if(isset($requestData['order'][0]['column']) && isset($requestData['order'][0]['dir']) && isset($requestData['start']) && isset($requestData['length'])){
$sql.=" ORDER BY ". $columns[$requestData['order'][0]['column']]." ".$requestData['order'][0]['dir']." LIMIT ".$requestData['start']." ,".$requestData['length']." "; // adding length
}
在代码仓库中查看
public function view_properties($email){
// storing request (ie, get/post) global array to a variable
$requestData= $_REQUEST;
$columns = array(
// datatable column index => database column name for sorting
0 => 'pr.date_created',
1 => 'dc.tdn_no',
2 => 'oct.orig_cert_no,tct.orig_cert_no',
3 => 'tct_no',
4 => 'owner_name',
5 => 'pr.status',
);
// getting total number records without any search
$sql = "SELECT *,oct.orig_cert_no as oct1, tct.orig_cert_no as oct2 FROM land_property pr
LEFT JOIN land_property_orig_title oct ON pr.prop_id = oct.prop_id
LEFT JOIN land_property_transfer_title tct ON pr.prop_id = tct.prop_id
LEFT JOIN land_property_declaration dc ON pr.prop_id = dc.prop_id
WHERE pr.email = ? ";
$params = array($email);
$query = $this->db->query($sql, $params);
$totalData = $query->num_rows();
$totalFiltered = $totalData; // when there is no search parameter then total number rows = total number filtered rows.
if( !empty($requestData['columns'][0]['search']['value']) ) //email address
{
$sql.=" AND tdn_no LIKE '%". $this->db->escape_like_str(sanitize($requestData['columns'][0]['search']['value']))."%' ";
}
if( !empty($requestData['columns'][1]['search']['value']) ) //email address
{
$sql.=" AND oct.orig_cert_no LIKE '%". $this->db->escape_like_str(sanitize($requestData['columns'][1]['search']['value']))."%' OR tct.orig_cert_no LIKE '%". $this->db->escape_like_str(sanitize($requestData['columns'][1]['search']['value']))."%' ";
}
if( !empty($requestData['columns'][2]['search']['value']) ) //email address
{
$sql.=" AND owner_name LIKE '%". $this->db->escape_like_str(sanitize($requestData['columns'][2]['search']['value']))."%' ";
}
if( !empty($requestData['columns'][3]['search']['value']) ) //email address
{
$sql.=" AND tct_no LIKE '%". $this->db->escape_like_str(sanitize($requestData['columns'][3]['search']['value']))."%' ";
}
$query = $this->db->query($sql, $params);
$totalFiltered = $query->num_rows(); // when there is a search parameter then we have to modify total number filtered rows as per search result.
if(isset($requestData['length'])){
$sql.=" ORDER BY ". $columns[$requestData['order'][0]['column']]." ".$requestData['order'][0]['dir']." LIMIT ".$requestData['start']." ,".$requestData['length']." "; // adding length
}
$query = $this->db->query($sql, $params);
$data = array();
foreach( $query->result_array() as $row ) { // preparing an array for table tbody
$nestedData=array();
// $nestedData[] = $row["date_created"];
if($row['tdn_no']==''){
$tdn = "<h1>-</h1>";
} else {
$tdn = $row['tdn_no'];
}
$nestedData[] = $tdn;
if($row['oct1']!=""){
$nestedData[] = $row["oct1"];
} else {
$nestedData[] = $row["oct2"];
}
$nestedData[] = $row["tct_no"]==""?"-":$row["tct_no"];
$nestedData[] = $row["owner_name"];
if($row["status"] == 4){
$status = "<span class='badge badge-danger tbl-badge'>Hold</span>";
}
elseif($row["status"] == 1){
$status = "<span class='badge badge-success tbl-badge'>Assessed</span>";
}
elseif($row["status"] == 2){
$status = "<span class='badge badge-warning tbl-badge'>For Assessment</span>";
}
$nestedData[] = $status;
$nestedData[] = $row["status"];
$nestedData[] = '<button class="btn btn-primary btnView btnView-1 btn-cus" > View</button> ';
$data[] = $nestedData;
}
$json_data = array(
"recordsTotal" => intval( $totalData ), // total number of records
"recordsFiltered" => intval( $totalFiltered ), // total number of records after searching, if there is no searching then totalFiltered = totalData
"data" => $data, // total data array
);
return $json_data;
}