kohana专栏自省 [英] kohana columns introspection

问题描述

我想知道KOHANA模型上$ _table_columns数组的功能是什么.

I would like to know which is the functionality of the $_table_columns array on a KOHANA model.

我问这个问题是因为表的列是通过自省加载的，此数组的用途是什么，它是属性的默认值吗?

I ask this since the table's columns are loaded by introspection, what is the use of this array, is it for default values to the properties?

推荐答案

$_table_columns反映了您的表列结构.因此，如果您的表有3列(id，name，desc)，则将$_table_columns设置为array('id' => '', 'name' => '', 'desc' => '').

$_table_columns reflects your table column structure. So if your table has 3 columns (id, name, desc), $_table_columns will be setup to array('id' => '', 'name' => '', 'desc' => '').

默认情况下，$_table_columns是一个空数组.当使用类扩展ORM且不覆盖$_table_columns时，ORM将通过调用SHOW FULL COLUMNS FROM table_name命令自动将其填充.如果要避免此额外的数据库调用，可以自行初始化$_table_columns:

By default $_table_columns is an empty array. When you extend ORM with your class and don't override $_table_columns, it will be automatically filled by ORM by calling SHOW FULL COLUMNS FROM table_name command. If you want to avoid this additional DB call, you can initialize $_table_columns on your own:

class Model_User extends ORM {
   protected $_table_columns = array('id' => '', 'name' => '', 'desc' => '');
}

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