Fixed: How To Fix Codeigniter Database Query Error

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    Recently, some readers reported a query error in the Codeigniter database.

    I added a new row to the table at the same time (10 users)

    How do I check database errors?

    Click the MySQL Databases icon.In the “Edit Databases” section and in the “Check Database” drop-down list, select the database you want to check.Then click Check Database.This is problem! Verification completed, but no errors were found.

    My most important element is determined based on user input in 3 groups

    Blue

    Yellow

    codeigniter database query error

    Green

    If the user selects a blue id, it should be B001, B002

    How do I catch a database error in CodeIgniter?

    Leave debugging enabled and appearing in your error file, throw an exception. So in your database config you have: $db[‘default’][‘db_debug’] = true; Then mine in your main database error view file will be visible as application/errors/error_db.

    Yellow Y001, Y002

    I include a check to get the last id with a request but sometimes I get an identical key

    I want to catch the db error that i can change the id and additionally try to insert it again

    Try
    $result=$this->db->insert($table,$data);
    echo $result;
    Print $result;
    . . . . . . .Catch(Exception$e)
    . . . . . . . Echo “test error”
    //Get a new login
    // Insert data with new ID

    but it works now

    12.10.2019, 07:44
    (This watchThis post was last edited by tp45 on 10/12/2019 7:45 PM.)

    Try

    PHP code:

    if($this->db->insert($table,$data))
    returns true;
    else
    returns false;
    //or< br> echo $this->db->error();

    13.10.2019, 19:26
    (This post was last edited by amansusanto, 10/13/2019 7:29 PM.)

    doesn’t work

    mastered:

    $check=false;

    while (!$check)

    $no = $this->m_home->getLastId($grp);

    $data = array(

    codeigniter database query error

    ‘no’ => $nno,

    ‘user group’ => $group,

    ‘Name’ => $n,

    ‘mobile’ => million dollars

    $check= $this->m_home->input_data($data,’users’);

    in the model

    function input_data($data,$table)

    $this->db->db_debug = false;

    How do I catch a database error in CodeIgniter?

    if($this->db->insert($table,$data))

    Returns true;

    other

    returns false;

    A

    It would be better to create a separate table dedicated to the latest identifiers.

    Array last_id

    blue_id

    yellow_identifier

    green_identifier

    When you create a user record, assign a new correct ID with application increment.

    What did you learn from trying this? What do you get What did you expect?

    Joined the CodeIgniter community in 2009 (Skype: insitfx)

    (2019-10-14 04:21) InsiteFX wrote: It would be more useful to create a separate table to store trade IDs.

    array last_id
    id_bleu
    id_yellow
    id_vert

    When you create a gender record Name of the computer, assign the correct identifier with a large increment method.

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  • still can’t because login is reported by many people, not the user

    it could be entered in red for multiple users at the same time

    (10.14.2019, 04:42) amansusanto wrote:

    (10/14/2019 04:21 AM) InsiteFX wrote: A better way would be to buy a separate table for my latest IDs.

    array last_id
    id_bleu
    id_yellow
    id_vert

    When you create my user entry, assign the correct personal id using the increment method.

    still not with many people input per user

    it can also be entered by multiple users

    So essentially you are blessed with a race condition.

    The easiest way to solve this problem is to use the most important primary key to store a short period in the database and use a special lock to attach colored transaction tags to it i.

    In particular, we do this when creating account numbers, creating a corresponding second table with the last amount, locking it as part of the transaction, and then adding the real 1 to the stored value. Then, at the end of the money, update the value in the transfer table.

    This way you block further access to the critical value and give yourself access to it. Once the transaction is completed, it will be unlocked and tracking can continue.

    Keep in mind that this will definitely not scale to a large number of users, as some of the new transactions in the queue will start to lose power at this point.

    Is there a faster way?

    Why can’t the ci function be recognized when there might be a request error

    PHP code:

    if (! $this->db->simple_query('SELECT `example_field` FROM `example_table`'))

    $error = $this->db->error (); // Has "Code" and "Message" keys

    What have you tried? What do you get What did you expect?

    How do I check database errors?

    Joined the CodeIgniter 2009 community. Skype: ( insitfx )

    How do you handle database errors?

    I added a new row to the table at the same time (ten users)

    My primary key is only determined based on user input or maybe groups

    I was testing to get the last id with a query but sometimes found an error duplicating the key

    Download this fixer software and fix your PC today.

    How do you handle database errors?

    On an improbable error, roll back all changes, but stop the mapping from running.You can only rollback a transaction with an error in combination with Continue.Cancel the first transaction to continue.

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