"Missing argument" warning while calling a model method from a controller in CodeIgniter

Question

I am new in codeigniter. I want to create a search bar where user write some keyword and it will check in all fields of table in database and then show relative result.

Here is my code of View:

<?php

    echo '<h2>Search Books</h2>';
    echo form_open('site/search');?>

<p>
<label for="title"> Title:</label>
 <input type="text"  placeholder="Search" name="search" size="50%">
</p>
<input type="submit" value="Submit"/>
    <?php echo form_close(); ?>

<!--Here will be Search Result-->
<?php if (isset($searches)): foreach($searches as $search):?>
<h4><?php echo " &nbsp ";
echo $search->book_name;
echo " &nbsp "; ?></h4>
<?php endforeach; ?>
<?php else: ?>
No Book Found
<?php endif;?>

And the controller code with name site is

function search(){

            $search_book = array (
                            $search= $this->input->post('search')
            );
            $this->users_model->user_search($search_book);
            $this->dashboard();

Query Result in Controller

if ($query = $this->users_model->user_search())
            {

                $search['searches'] = $query;
            }
            $data = $search;
             $this->load->view('dashboard', $data);

Here is Model Code:

function user_search($search_book){

                 $query = $this->db->like('book_name', $search_book);
             $this->db->or_like('author', $search_book);
              $this->db->or_like('date', $search_book);
             $this->db->get('books');
                return $query->result();

Error Shown

A PHP Error was encountered

Severity: Warning

Message: Missing argument 1 for Users_model::user_search(), called in C:\xampp\htdocs\Pure_Logics\application\controllers\site.php on line 28 and defined

Filename: models/users_model.php

Line Number: 26

Backtrace:

File: C:\xampp\htdocs\Pure_Logics\application\models\users_model.php Line: 26 Function: _error_handler

File: C:\xampp\htdocs\Pure_Logics\application\controllers\site.php Line: 28 Function: user_search

File: C:\xampp\htdocs\Pure_Logics\index.php Line: 315 Function: require_once

Answer 1

Missing argument in method calling

$this->users_model->user_search()

change to

 if ($query = $this->users_model->user_search($this->input->post('search')))
  {

     $search['searches'] = $query;
  }

Model:

function user_search($search_book){

                 $this->db->like('book_name', $search_book);
                 $this->db->or_like('author', $search_book);
                 $this->db->or_like('date', $search_book);
                 $query = $this->db->get('books');
                 return $query->result();
  }

Controller:

function search(){

    $this->dashboard();
     $data['searches'] =array();
    if ($query = $this->users_model->user_search($this->input->post('search')))
    {

        $data['searches'] = $query;
    }

     $this->load->view('dashboard', $data);

}

1) You calling method without argument . But your defined method with argument in model .