在我的WordPress数据库中,我有三张表wp_companies,它存储了一些公司信息,wp_product_types,它存储了一系列的产品类型,公司可以自行分配,然后我有wp_company_products,它用来使用id为公司分配产品类型。
下面是一个数据库的例子。
wp_companies
id | company_name | member_type | logo
-----------------------------------------------------------------
1 | Google | full | https://via.placeholder.com/150
-----------------------------------------------------------------
2 | Crunchyroll | full | https://via.placeholder.com/150
wp_products
id | product_name |
----------------------
1 | Car Insurance |
----------------------
2 | House Insurance |
----------------------
3 | Life Insurance |
wp_company_products
id | company_id | product_id
----------------------------
1 | 1 | 2
----------------------------
2 | 2 | 1
----------------------------
3 | 1 | 3
这是我当前的MySQL查询,简单地显示了wp_companies中的数据。
add_action('rest_api_init', function() {
register_rest_route('custom-routes/v1', 'members', array(
'methods' => 'GET',
'callback' => 'get_members'
) );
});
function get_members($data) {
global $wpdb;
$query = $wpdb->get_results( "SELECT company_name, member_type, logo, site_url FROM {$wpdb->prefix}companies ORDER BY RAND()" );
foreach ( $query as $member ) {
$member_data[] = array(
"company_name" => $member->company_name,
"member_type" => $member->member_type,
"logo" => $member->logo,
);
}
return $member_data;
}
这样在我的api端点上就会显示我的数据。
[
{
"company_name":"Google",
"member_type":"full",
"logo":"https://via.placeholder.com/150",
},
{
"company_name":"Crunchyroll",
"member_type":"full",
"logo":"https://via.placeholder.com/150",
}
]
但我想把wp_companies和wp_company_products表合并起来,这样我的数据在api端点上就会这样显示。
[
{
"company_name":"Google",
"member_type":"full",
"logo":"https://via.placeholder.com/150",
"products": [
"House Insurance",
"Life Insurance"
]
},
{
"company_name":"Crunchyroll",
"member_type":"full",
"logo":"https://via.placeholder.com/150",
"products": [
"Car Insurance",
]
}
]
我如何构建我的MySQL查询来实现这个目标?
请试试这个
function get_members($data) {
global $wpdb;
$query = $wpdb->get_results( "SELECT company_name, member_type, logo, site_url FROM {$wpdb->prefix}companies ORDER BY RAND()" );
foreach ( $query as $member ) {
$productQuery = $wpdb->get_results( "SELECT product_name FROM wp_products WHERE id IN (SELECT product_id from wp_company_products WHERE compony_id = '{$member->id}') " );
$products = array();
foreach ( $productQuery as $prduct ) {
array_push($products ,$prduct->product_name);
}
$member_data[] = array(
"company_name" => $member->company_name,
"member_type" => $member->member_type,
"logo" => $member->logo,
"products" => $products
);
}
return $member_data;
}