仅当输入文本不为空时才插入到mysql中 - Codeigniter

Question

I m trying to insert some data into a table but I want to only insert if the variable is not empty.

My model code below.

$query_str = "INSERT INTO todo (";

     $query_and=array();

          if( !empty($one_input)){
              $query_and[]= 'one';
          }
          if( !empty($two_input)){
              $query_and[]=  'two';
          }
          if( !empty($three_input)){
               $query_and[]=  'three';
           }
        $query_str .= implode(', ', $query_and);
        $query_str .= ') VALUES (?, ?, ?)';

        $query_data=array();

            if( !empty($one_input)){ 
                $query_data[]= $one_input;
            }
            if( !empty($two_input)){ 
                $query_data[]= $two_input;
            }
            if( !empty($three_input)){ 
                $query_data[]= $three_input;
            }
         $query_dat = implode(', ', $query_data);
         $query_dat .= ");";

    $q = $this->db->query($query_str, $query_dat);

You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near '' at line 1

INSERT INTO todo (one, two, three) VALUES ('val1, val2, val3);',

Answer 1

I would use following syntax in your situation:

INSERT INTO todo
SET
    one='val1',
    two='val2',
    three='val3'

You can set field=value pairs in an array easier and add to the statement by imploding.

Added sample below:

        if( !empty($one_input)){ 
            $query_data[]= "one='$one_input'";
        }
        if( !empty($two_input)){ 
            $query_data[]= "two='$two_input'";
        }
        if( !empty($three_input)){
            $query_data[]= "three='$three_input'";
        }

        $query = "INSERT INTO todo SET " . implode(",", $query_data);