how to get product attributes from wordpress database

Writing custom code to create product detail page with wordpress database.

I have displayed product title, desc, price, stock, etc and got stuck up with product attributes.
In the database, _product_attributes is stored in serialized manner in wp_postmeta table in database. And i couldn't unserailize attributes from it. But i found, each attribute value with it own price has been stored in wp_postmeta in some other post_id.

for example, product with post_id=55 has attribute name 'Size value' having values 14 and 18 and price 300 and 350, is displayed as attributes value and price in post_id=110,111

![wp_postmeta][1]
![wp-postmeta-example][2]

is there any formula behind? Any idea to find this product attribute value and corresponding price value?


[1]:

[2]:

I took a little bit of a different approach, I created a stored procedure in my database that will return all terms associated with a woocommerce product. I decided to go this route because i can call the procedure from my wordpress site and the desktop app I am creating without having to write the function in two different languages.

Though I'd post it here for others to use.

CREATE DEFINER=`database_name_here`@`%` PROCEDURE `get_product_attributes`(IN ProductName TEXT)
BEGIN
SELECT DISTINCT
p.post_title AS 'Product Name',
t.name AS 'Term Name',
tt.taxonomy AS 'Term Type',
tt.description AS 'Term Description'
FROM
wp_posts AS p
INNER JOIN
wp_term_relationships AS tr ON p.id = tr.object_id
INNER JOIN
wp_term_taxonomy AS tt ON tt.term_taxonomy_id = tr.term_taxonomy_id
INNER JOIN
wp_terms AS t ON t.term_id = tt.term_id
WHERE
p.post_title= ProductName
AND
p.post_type = 'product';
END

Product attributes are stored in two locations - in wp_terms, wp_term_taxonomy and wp_term_relationships (that's the first place - each attribute is preceded by pa_ for its taxonomy name - e.g. if you have a color attribute, it's under pa_color) then also as a PHP serialized array in wp_postmeta under '_product_attributes' meta_key.

You can find the method to construct the seriliazed attributes array here:

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Look for function save_attributes() and add_attribute to see how the serialized array is constructed.

**Update**: Later versions of wooCommerce also have a serialized array in wp_options under the _transient_wc_attribute_taxonomies key and a new table called wp_woocommerce_attribute_taxonomies.

$args = array( 'post_type' => 'product','' );
$products = get_posts( $args );

foreach ($products as $product) {
$data = get_post_meta($product->ID);
$pr['regular_price'] = $data['_regular_price']['0'];
$pr['sale_price'] = $data['_sale_price']['0'];
}

Based on [Fütemire][1]'s brilliant answer, this is how to get attributes by post ID

SELECT DISTINCT
p.ID,
t.name AS 'Term Name',
tt.taxonomy AS 'Term Type',
tt.description AS 'Term Description',
(
SELECT
wat.attribute_label
FROM
wp_woocommerce_attribute_taxonomies wat
WHERE
wat.attribute_name LIKE REPLACE(tt.taxonomy, 'pa_', '')
) AS 'Attribute Name'
FROM
wp_posts AS p
INNER JOIN
wp_term_relationships AS tr
ON p.id = tr.object_id
INNER JOIN
wp_term_taxonomy AS tt
ON tt.term_taxonomy_id = tr.term_taxonomy_id
INNER JOIN
wp_terms AS t
ON t.term_id = tt.term_id
WHERE
p.ID = 15870
AND
p.post_type = 'product'
AND
tt.taxonomy LIKE 'pa_%'


[1]:

[To see links please register here]

if you want to get every attribute as a new column you can add multiple join with filter like;

select
inv_sku.meta_value as sku,
wp.post_title as title,
inv_category.name as category,
inv_subcategory.name as subcategory,
inv_brand.name as brand,
inv_price.meta_value as sale_price
from wp_posts as wp
inner join wp_postmeta as inv_sku on inv_sku.post_id =wp.ID and inv_sku.meta_key ='_sku'
inner join wp_postmeta as inv_price on inv_price.post_id =wp.ID and inv_price.meta_key ='_sale_price'
left join (
select tr.object_id, t.name from wp_term_relationships AS tr
left join wp_term_taxonomy AS tt ON tt.term_taxonomy_id = tr.term_taxonomy_id
left join wp_terms AS t ON t.term_id = tt.term_id
where tt.taxonomy ='pa_brand'
) as inv_brand on wp.ID =inv_brand.object_id
left join (
select tr.object_id, t.name from wp_term_relationships AS tr
left join wp_term_taxonomy AS tt ON tt.term_taxonomy_id = tr.term_taxonomy_id
left join wp_terms AS t ON t.term_id = tt.parent
where tt.taxonomy ='product_cat'
) as inv_category on wp.ID =inv_category.object_id
left join (
select tr.object_id, t.name from wp_term_relationships AS tr
left join wp_term_taxonomy AS tt ON tt.term_taxonomy_id = tr.term_taxonomy_id
left join wp_terms AS t ON t.term_id = tt.term_id
where tt.taxonomy ='product_cat'
) as inv_subcategory on wp.ID =inv_subcategory.object_id
where wp.post_type ='product'