1. The table has two fields: original_theme_id and theme_id. The value of the original_theme_id field comes from the theme_id of another record in the same table. See Figure 1.
2. Define a one-to-one inverse relationship in the model. The code implementation is as follows:
PHP
/**
* 获取此主题安装所属原始的主题安装
* @return BelongsTo
*/
public function originalThemeInstallation()
{
return $this->belongsTo('Modules\ThemeStoreDB\Entities\ThemeInstallation', 'original_theme_id', 'theme_id');
}
3. The code implementation for retrieving the relationship property and the generated SQL:
PHP
$themeInstallation = ThemeInstallation::find(345);
print_r($themeInstallation->originalThemeInstallation);
exit;
SQL
select
*
from
`theme_installation`
where
`theme_installation`.`theme_id` = '96b1c8b9-5b18-4760-9e26-50ab009ac011'
and `theme_installation`.`deleted_at` is null
limit
1
4. The printed result matches expectations.
Plaintext
Modules\ThemeStoreDB\Entities\ThemeInstallation Object
(
[table:protected] => theme_installation
[attributes:protected] => Array
(
[id] => 35
[theme_store_theme_id] => 21
[original_theme_id] =>
[theme_id] => 96b1c8b9-5b18-4760-9e26-50ab009ac011
[original_wp_theme_id] => 0
[wp_theme_id] => 6
[theme_name] => brooklyn
[theme_custom_name] => brooklyn 6 2
[type] => 1
[role] => unpublished
[processing] => 0
[processing_failed] => 0
[created_at] => 2022-07-04 02:53:29
[updated_at] => 2022-12-09 03:04:36
[deleted_at] =>
)
)