How to Handle Transactions in Multiple Function Calls in CodeIgniter?

Handling Transactions in Multiple Function Calls in CodeIgniter

Problem:

CodeIgniter transactions are reliable for safe database insertions. However, when calling external functions within transaction boundaries (trans_start and trans_complete), database operations within those functions are not handled within the transaction. This can result in errors and incomplete rollbacks.

Proposed Solution:

To resolve this issue, we can manually handle database operations within the external functions by adding a rollback check within each function. If an error occurs, the rollback will be initiated.

Code:

// Function within Model
public function insert_function($data)
{
    $this->db->insert('table_name', $data);
    if ($this->db->error()) {
        $this->db->trans_rollback();
        return false; // Error occurred
    }
    return true; // Success
}

// Calling Function within Transaction in Model
$this->db->trans_start();
$result = $this->insert_function($data);
if (!$result) {
    $this->db->trans_rollback();
}
$this->db->trans_complete();

Alternative Approach:

Another approach is to implement the transaction handling logic outside the function within the trans_start and trans_complete boundaries. This ensures that any database operations within the external function are handled within the transaction.

Code:

// Function within Model
public function insert_function($data)
{
    $this->db->insert('table_name', $data);
}

// Calling Function within Transaction in Model
$this->db->trans_start();
$this->insert_function($data);
if ($this->db->error()) {
    $this->db->trans_rollback();
}
$this->db->trans_complete();

Important Considerations:

• Ensure that database operations are handled within the transaction boundaries.
• If an error occurs within an external function, the rollback should be initiated immediately to ensure data integrity.
• Consider using a centralized transaction management mechanism for improved control and debugging.

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