codeigniter 2.0一次将记录插入两个表中

Question

I'm not sure how to handle this with active records or using manual sql. What I want to do is to add a record into the 'contact' table which has an auto incremented id, and then add a record into the "order" table with the id of the corresponding 'contact' record id.

I know I can get the id of the inserted contact record using $this->db->insert_id(), but does that only work when using active records?

Also, can I achieve this type of insert in one query, or must I split it up in two?

Answer 1

$this->db does not refer to Active Record. You must choose to use Active Record, $this->db simply refers to the database abstraction layer.

That said, you can use $this->db->insert_id() immediately after a query (Active Record or not) to get its insert ID.

But to handle inserting multiple records at once that are dependent on eachother's IDs, I would switch to InnoDB as your table type (if you haven't already) and use CodeIgniter's transactions .

Here's an example, adapted from CodeIgniter's documentation:

$this->db->trans_start();

$this->db->query('INSERT INTO table1 VALUES(id,field1,field2)');
$table1_id = $this->db->insert_id();

$this->db->query('INSERT INTO table2 VALUES(id,' . $table1_id . ',field2,field3)');

$this->db->trans_complete(); 

Answer 2

According to Codeigniter, the $this->db is named "Active Record" [sic!] so you already answered your own question in these terms. Otherwise you need to actually specify which kind of thing you mean by writing "Active Record" .

In PHP the Mysqli extension offers to run multiple queries at once: mysqli::multi_query ^Docs .

The last insert ID function exists in Mysql itself as well and can be used inside any SQL query then, it is called LAST_INSERT_ID() ^{Mysql Docs} .

INSERT INTO contact;
INSERT INTO order SET contact_ID = LAST_INSERT_ID();

Maybe this is the information you're looking for.

Answer 3

Additional Info

Don't forget to Check For success of Transaction:

$this->db->trans_complete();

    if($this->db->trans_status() === FALSE){// Check Transaction Result successful                          
         echo "<br>------- INFO WAS >>>>>>> NOT INSERTED <<<<<<< -------<br>";
    }else{
         echo "<br>------- >>>>>>> TRANSACTION SUCCESSFUL <<<<<<< -------<br>";
    }