Codeigniter活动记录：根据ID将空记录插入到多个表中

Question

I am using Codeigniter Active Record Class

I am trying to create empty records for a particular id in multiple tables . For example lets say my user has the id $user_id , and I want to create empty records in tables T1, T2 and T3 . The code I am having trouble with is:

        // Store the select statement in cache
        $this->db->start_cache();
        $this->db->set('user_id', $user_id);
        $this->db->stop_cache();
        // Insert empty record in tables related to user
        $this->db->insert('T1');
        $this->db->insert('T2');
        $this->db->insert('T3');
        $this->db->flush_cache();

An empty record is inserted in table T1 but then I get the error:

You must use the "set" method to update an entry.

EDIT: - Obviously, tables T1, T2 & T3 have user_id columns.

What am I doing wrong and how can I fix this? I am new to codeigniter and the CI documentation is not clear about this issue.

Answer 1

Instead of using $this->db->set() , you can store the required value in an array and then do the insertion. This may help

    // Store the select statement in cache
    $data = array("user_id"=>$user_id);

    // Insert empty record in tables related to user
    $this->db->insert('T1',$data);
    $this->db->insert('T2',$data);
    $this->db->insert('T3',$data);

Answer 2

Try this

    // Store the select statement in cache
    $this->db->cache_on();
    $this->db->set('user_id', $user_id);
    $this->db->cache_off();
    // Insert empty record in tables related to user
    $this->db->insert('T1');
    //$this->db->set('user_id', $user_id);
    $this->db->insert('T2');
    //$this->db->set('user_id', $user_id);
    $this->db->insert('T3');
    $this->db->cache_delete_all();