我正在使用db forge进行数据库迁移。add_foreign_key将密钥从第一个创建的表添加到第二个表

Question

I am using db forge for database migration in ci.When I add foreign key in first created table. It works but in second table foreign key from first table inherit so it create problem to create the sencond table. Here is my code

<?php if (!defined('BASEPATH')) exit('No direct script access allowed');
class Initial_schema {
    function up() 
    {
        $CI =& get_instance();
        if($CI->migrate->verbose)
            echo "Creating tables...";
        // create table TblRowStatusEnum
        if(! $CI->db->table_exists('TblRowStatusEnum')) {
            $cols = array(
                'id' => array('type' => 'INT', 'constraint' => 11, 'auto_increment' => TRUE,'null'=>FALSE),
                'status' => array('type' => 'enum("Active","Inactive","Delete")', 'null' => FALSE),
                'description' => array('type' => 'VARCHAR', 'constraint' => '200', 'null' => True),
                'createdAt' => array('type' => 'datetime', 'null' => FALSE),
                'updatedAt' => array('type' => 'datetime', 'null' => TRUE)

            );

            // Setup Keys
            $CI->dbforge->add_key('id', TRUE);
            $CI->dbforge->add_field($cols);
            $CI->dbforge->create_table('TblRowStatusEnum', TRUE);

            //insert data
            /*$insert = array('status' => 'Active','description' =>'Active');
            $CI->db->insert('TblRowStatusEnum', $insert);
            $insert = array('status' => 'Inactive','description' =>'Inactive');
            $CI->db->insert('TblRowStatusEnum', $insert);
            $insert = array('status' => 'Delete','description' =>'Delete');
            $CI->db->insert('TblRowStatusEnum', $insert);*/

    }

    // create table TblUser
    if(! $CI->db->table_exists('TblUser')) {
        $cols = array(
        'id' => array('type' => 'INT', 'constraint' => 11,'auto_increment' => TRUE,'null'=>FALSE),
        'facebookId' => array('type' => 'INT','constraint' => '11', 'null' => FALSE),
        'firstName' => array('type' => 'VARCHAR','constraint' => '255', 'null' => FALSE),
        'middleName' => array('type' => 'VARCHAR','constraint' => '255', 'null' => TRUE),
        'lastName' => array('type' => 'VARCHAR','constraint' => '255', 'null' => FALSE),
        'email' => array('type' => 'VARCHAR','constraint' => '255', 'null' => FALSE),
        'address' => array('type' => 'TEXT'),
        'dateOfBirth' => array('type' => 'DATE'),
        'facebookAuthToken' => array('type' => 'TEXT', 'null' => FALSE ,'comment'=>"For storing auth token for offline access. If we don''t need offline access this column can be deleted"),
        'profileImageUrl' => array('type' => 'TEXT','null' => FALSE),
        'rowStatus' => array('type' => 'INT','constraint' => '11','null' => FALSE),
        'createdAt' => array('type' => 'DATETIME', 'null' => FALSE),
        'updatedAt' => array('type' => 'DATETIME', 'null' => TRUE)
        );

        // Setup Keys
        $CI->dbforge->add_key('id', TRUE);
        $CI->dbforge->add_key('rowStatus');
        $CI->dbforge->add_field($cols);




        //gives CONSTRAINT FOREIGN KEY `fk_testTable_testField` (`myField`)
        //      REFERENCES testTable(`testField`) ON DELETE CASCADE ON UPDATE CASCADE

        $CI->dbforge->add_foreign_key(array('field' => 'rowStatus',
        'foreign_table' => 'TblRowStatusEnum',
        'foreign_field' => 'id'));
        $CI->dbforge->create_table('TblUser', TRUE);
    }

    //TblSellingItem
    if(! $CI->db->table_exists('TblSellingItem')) {
        $cols = array(
        'id' => array('type' => 'INT', 'constraint' => 11,'auto_increment' => TRUE,'null'=>FALSE),
        'title' => array('type' => 'VARCHAR','constraint' => '255', 'null' => FALSE),
        'description' => array('type' => 'TEXT'),
        'price' => array('type' => 'FLOAT','null' => FALSE),
        'postedBy' => array('type' => 'INT','constraint' => 11,'null' => FALSE),
        'rowStatus' => array('type' => 'INT','constraint' => 11,'null' => FALSE),
        'createdAt' => array('type' => 'datetime', 'null' => FALSE,'default'=>get_now()),
        'updatedAt' => array('type' => 'datetime', 'null' => TRUE)

        );

        // Setup Keys
        $CI->dbforge->add_key('id', TRUE);
        $CI->dbforge->add_key('postedBy');
        $CI->dbforge->add_key('rowStatus');
        $CI->dbforge->add_field($cols);
        $CI->dbforge->add_foreign_key(array('field' => 'rowStatus',
           'foreign_table' => 'TblRowStatusEnum',
           'foreign_field' => 'id'));
       $CI->dbforge->add_foreign_key(array('field' => 'postedBy',
       'foreign_table' => 'TblUser',
       'foreign_field' => 'id'));
        $CI->dbforge->create_table('TblSellingItem', TRUE);


    }

    //TblItemImage
    if(! $CI->db->table_exists('TblItemImage')) {
        $cols = array(
        'id' => array('type' => 'INT', 'constraint' => 11, 'auto_increment' => TRUE,'null'=>FALSE),
        'sellingItemId' => array('type' => 'INT','constraint' => '11', 'null' => FALSE),
        'url' => array('type' => 'TEXT','null' => FALSE),
        'imageOrder' => array('type' => 'INT','null' => FALSE),
        'rowStatus' => array('type' => 'INT','constraint' => 11,'null' => FALSE),
        'createdAt' => array('type' => 'datetime', 'null' => FALSE,'default'=>get_now()),
        'updatedAt' => array('type' => 'datetime', 'null' => TRUE)

        );

        // Setup Keys
        $status =array('field' => 'rowStatus',
        'foreign_table' => 'TblRowStatusEnum',
        'foreign_field' => 'id');
        $posted_by =array('field' => 'sellingItemId',
        'foreign_table' => 'TblSellingItem',
        'foreign_field' => 'id');
        $CI->dbforge->add_key('id', TRUE);
        $CI->dbforge->add_key('sellingItemId');
        $CI->dbforge->add_key('rowStatus');
        $CI->dbforge->add_field($cols);
        $CI->dbforge->add_foreign_key($status);
        $CI->dbforge->add_foreign_key($posted_by);
        $CI->dbforge->create_table('TblItemImage', TRUE);



    }


    //TblChatMessage
    if(! $CI->db->table_exists('TblChatMessage')) {

    $cols = array(
    'id' => array('type' => 'INT', 'constraint' => 11, 'auto_increment' => TRUE,'null'=>FALSE),
    'sellingItemId' => array('type' => 'INT','constraint' => '11', 'null' => FALSE),
    'message' => array('type' => 'TEXT'),
    'sender' => array('type' => 'INT','null' => FALSE),
    'receiver' => array('type' => 'INT','null' => FALSE),
    'sentTime' => array('type' => 'datetime', 'null' => FALSE),
    'messageStatus' => array('type' => 'INT','constraint' => 11,'null' => FALSE),
    'rowStatus' => array('type' => 'INT','constraint' => 11,'null' => FALSE),
    'createdAt' => array('type' => 'datetime', 'null' => FALSE,'default'=>get_now()),
    'updatedAt' => array('type' => 'datetime', 'null' => TRUE)

    );

    // Setup Keys
    $CI->dbforge->add_key('id', TRUE);
    $CI->dbforge->add_key('sellingItemId');
    $CI->dbforge->add_key('sender');
    $CI->dbforge->add_key('receiver');
    $CI->dbforge->add_key('rowStatus');
    $CI->dbforge->add_field($cols);

    $CI->dbforge->add_foreign_key(array('field' => 'rowStatus',
    'foreign_table' => 'TblRowStatusEnum',
    'foreign_field' => 'id'));
    $CI->dbforge->add_foreign_key(array('field' => 'sellingItemId',
    'foreign_table' => 'TblSellingItem',
    'foreign_field' => 'id'));
    $CI->dbforge->add_foreign_key(array('field' => 'receiver',
    'foreign_table' => 'TblUser',
    'foreign_field' => 'id'));
    $CI->dbforge->add_foreign_key(array('field' => 'sender',
    'foreign_table' => 'TblUser',
    'foreign_field' => 'id'));

    $CI->dbforge->create_table('TblChatMessage', TRUE);





    }


    }

    function down() 
    {
        $CI =& get_instance();
        if($CI->migrate->verbose)
        echo "Dropping table accounts...";
        $CI->dbforge->drop_table('TblRowStatusEnum');
    }
}

?>

Error is like this

A Database Error Occurred

Error Number: 1072

Key column 'postedBy' doesn't exist in table

CREATE TABLE IF NOT EXISTS `TblItemImage` ( `id` INT(11) NOT NULL AUTO_INCREMENT, 
`sellingItemId` INT(11) NOT NULL, `url` TEXT NOT NULL, `imageOrder` INT NOT NULL, 
`rowStatus` INT(11) NOT NULL, `createdAt` datetime DEFAULT '2014-03-19 11:51:13' NOT NULL, 
`updatedAt` datetime NULL, PRIMARY KEY `id` (`id`), FOREIGN KEY `rowStatus` (`rowStatus`) 
REFERENCES `TblRowStatusEnum`(`id`), FOREIGN KEY `rowStatus` (`rowStatus`) REFERENCES 
`TblRowStatusEnum`(`id`), FOREIGN KEY `postedBy` (`postedBy`) REFERENCES `TblUser`(`id`), 
FOREIGN KEY `rowStatus` (`rowStatus`) REFERENCES `TblRowStatusEnum`(`id`), FOREIGN KEY 
`sellingItemId` (`sellingItemId`) REFERENCES `TblSellingItem`(`id`), KEY `sellingItemId` 
(`sellingItemId`), KEY `rowStatus` (`rowStatus`) ) DEFAULT CHARACTER SET utf8 COLLATE utf8_general_ci;

Filename: C:\xampp\htdocs\plunder_migration\system\database\DB_driver.php

Line Number: 330

here FOREIGN KEY postedBy is add automatically in table TblItemImage. what is wrong with my code? Thank You.

Answer 1

您可以通过以下代码更改发布的约束来进行测试，并将结果提供给我们吗？

postedBy' => array('type' => 'INT','constraint' => 11,'null' => TRUE),