WooCommerce: Finding the products in database

In WooCommerce, you can find products in the database using the WC_Product_Query class. The WC_Product_Query class allows you to create a query for retrieving products based on various parameters, such as product ID, name, category, or status.

Here is an example of how you can use the WC_Product_Query class to retrieve all products that are in stock:

Copy code$query = new WC_Product_Query( array(
    'status' => 'publish',
    'stock_status' => 'instock',
) );
$products = $query->get_products();

You can also use the WC_Product_Data_Store class to retrieve products from the database. The WC_Product_Data_Store class provides access to the underlying data store for products, allowing you to retrieve products based on various parameters such as product ID, name, category, or status.

Copy code$data_store = WC_Data_Store::load( 'product' );
$product_ids = $data_store->search_products( 'Keyword', '', '', true );

You can also use the get_posts() function to retrieve products from the database. The get_posts() function is a WordPress function that allows you to retrieve any type of post from the database, including products.

Copy code$args = array(
    'post_type' => 'product',
    'post_status' => 'publish',
    'posts_per_page' => -1
);
$products = get_posts( $args );

In addition, you can use the wp_query class to retrieve products from the database based on multiple parameters such as category, tag, price, etc.

Copy code$args = array(
    'post_type' => 'product',
    'post_status' => 'publish',
    'tax_query' => array(
        'relation' => 'AND',
        array(
            'taxonomy' => 'product_cat',
            'field' => 'slug',
            'terms' => array( 't-shirts' )
        ),
        array(
            'taxonomy' => 'product_tag',
            'field' => 'slug',
            'terms' => array( 'red' )
        )
    )
);
$query = new WP_Query( $args );
$products = $query->get_posts();

Note that when using the get_posts() or wp_query to retrieve products, it returns an array of post objects, while in the other two cases the products will be returned as WC_Product objects, which have more methods and properties that you can use to access product details.

It’s also important to note that when working with the database, you should be careful and make sure to use the appropriate parameters to avoid retrieving unnecessary data, and to make sure that the query is optimized for performance.