扩展在codeigniter 2.0 CI_DB_active_record类 [英] Extending the CI_DB_active_record class in codeigniter 2.0

问题描述

我写我的第一个程序与codeigniter，并遇到了一个问题。我将开始与问题的集中描述，可以扩大它，如果我需要：

I am writing my first program with Codeigniter, and have run into a problem. I will start with a focused description of the problem and can broaden it if I need to:

我需要写一个多维数组到数据库，并要使用insert_batch功能从CI_DB_active_record类的话。问题是，我需要写空值NULL对于某些字段，而其他字段需要为空字符串。目前的功能封装了单引号的所有值，我不能找到一种方法来写空值到数据库中指定的字段。

I need to write a multi-dimensional array to the DB and want to use the insert_batch function from the CI_DB_active_record class to do so. The problem is that I need to write empty values as NULL for some fields while other fields need to be empty strings. The current function wraps all values with single quotes, and I cannot find a way to write null values to the database for specified fields.

我也想增加每批的记录数。

I would also like to increase the number of records per batch.

我看到如何扩展模型，图书馆等，但有没有办法来扩展CI_DB_active_record类，而无需修改核心类？核心类修改的最小量，使这项工作，我发现正在修改中的db.php的文件中以下行（改变require_once文件，它扩展了CI_DB_active_record类和改变CI_DB_active_record类名新类的新文件名）：

I see how to extend models, libraries, etc., but is there a way to extend the CI_DB_active_record class without modifying core classes? The minimal amount of core class modification to make this work that I have found is modifying the following lines in the DB.php file (changing the require_once file to the new file that extends the CI_DB_active_record class and changing the CI_DB_active_record class name to the new class name):

require_once(BASEPATH.'database/DB_active_rec'.EXT);

        if ( ! class_exists('CI_DB'))
        {
            eval('class CI_DB extends CI_DB_active_record { }');
        }

我可以做的更好？

Can I do better?

推荐答案

您可以通过扩展Loader类。具体方法如下：

You can by extending the Loader class. Here's how:

HTTP：//www.simonemms .COM / code /扩展-任何─codeigniter数据库级/

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