Codeigniter subtracting time and making an selection from database in model - php

Question

I am building a library project where a user needs to know which books have not been submitted on time.So for that i have stored book_returning_date already in the database.However my issue here is that i need to know how to select the dates in model which have crossed there return date by comparing with today date.My model code is here as follow:
public function timecalculations($table){
$query= $this->db->get_where('issue_books',array('department_id'=>$table));
return $query->result();
}
and my controller is as here follows:
public function latebooks(){
$this->load->model('Time');
$id=$this->session->userdata('userid');
$this->load->model('Department');
$table=$this->Department->selecttable($id);
foreach($table as $q){}
$table = $q->department_name;
$table = strtolower($table);
$run=$this->Time->timecalculations($table);
$this->load->view('Books/datetime',['query'=>$run]);
}
I am new in codeigniter so please forgive as i may be having a little problem with the logic.Thanks in advance!

Answer 1

try this
public function timecalculations($table){
$query= $this->db->where('book_returning_date < CURRENT_DATE()', NULL, FALSE)->get($table);
return $query->result();
}

Answer 2

add another where clause,
public function timecalculations($table){
$this->db->where('book_returning_date < NOW()');
$query = $this->db->get($table);
return $query->result();
}
this will return the rows where current date is already crossed book_returning_date
i am assuming u are saving the book_returning_date in the following format 'yyyy-mm-dd H:i:s'

Answer 3

probably like this and sorry if i'm mistake
First need to Set Library Session setting in config
for model :
public function timecalculations($table){
$condition = 'department_id = "'.$table.'"';
$this->db->select('issue_books');
$this->db->where($condition);
$query= $this->db->get();
return $query->result();
}
for controller i'm not sure but like this :
public function __construct() {
$this->load->model('Time', 'time');
$this->load->model('Department', 'departement');
$this->load->library('Session');
}
public function latebooks($id){
$id=$this->session->userdata('userid');
$table=$this->department->selecttable($id);
foreach($table as $q){ (probably i'm wrong)
$table = $q->department_name; (probably i'm wrong)
} (probably i'm wrong)
$table = strtolower($table); (probably i'm wrong)
$run=$this->time->timecalculations($table);
$this->load->view('Books/datetime',['query'=>$run]);
}

Answer 4

Try this
In Controller
public function latebooks()
{
$this->load->model('Time');
$this->load->model('Department');
$id = $this->session->userdata('userid');
$result = $this->Department->selecttable($id); # Changed
$table = $result[0]['department_name']; # Changed
$table = strtolower($table); # Changed
$run = $this->Time->timecalculations($table);
$this->load->view('Books/datetime',['query'=>$run]);
}
In Model
public function timecalculations($table)
{
$query = $this->db->get_where('issue_books',array('department_id'=>$table));
$result = $query->result_array();
return $result;
}