Missing CartItem Variation Field in Cart Query

[hwsiew]

Describe the bug
There are cases where product variation's attributes can be set to 'Any' instead of particular selection as shown below. Currently, to query cart items with variable product, one can only get the attribute variation from product (e.g. ProductVariation ). This will work provided all attributes in variation product is set to specific value, for instance, the Pattern and Size attributes in the following attachment. However, if one of the attribute is set to 'Any', in this case the 'Color'. product variation for that attribute (i.e Color) will return empty string. There is no field available to query CartItem's variation for now.

To Reproduce
Steps to reproduce the behavior:

1. Create variable product with 'Any' variations.
2. Add the product variation with addToCart mutation
3. Query the Cart
4. Check the CartItem's Product Variation

Expected behavior
To be able to display selected attributes for CartItem like in the woocommerce cart page.

[kidunot89]

@hwsiew If you don't have a product attribute assigned to the variation meaning set to Any it will return a empty field "". This behavior is correct.

Product Attributes without a variation are meant to be descriptive only, otherwise it should be assigned to a variation, so inventory can be kept on the item.

[hwsiew]

Hi @kidunot89, customer will still need to choose one for the 'Any' attribute. So how can i get the field for the cart item? In this case, e.g. the 'Color' attribute is set to 'Any', how do i get the field if customer chose 'Green'? Like the one in woocommerce cart page, the cart item selected attributes can be listed down even for the 'Any' attribute.

[kidunot89]

@hwsiew Then you should use the color attribute on the product not the variation.

[hwsiew]

Hi @kidunot89, thanks for the prompt reply.

This is the variable product setting. Each variation has 3 attributes. Among these attributes, Color is set to Any in each variation. You are right, for attribute set to Any the query of the field will be empty "". I believe this is where the problem. In the case of all attributes in a variation product is set to specific value other than Any and query the variation of the product in Cart, basically can tell the customer selection for each attributes (since each attribute is set to one value). But in the case of attribute is set to Any in a variation, the variation attribute field will be "". Unless there is other field i missed to get the customer selected option for Any attribute?

[kidunot89]

@hwsiew That is correct. You can obtaining the options for the color field by queries attributes field on the parent product.

[hwsiew]

@kidunot89, Yup, it has been set to Any and the value from parent attributes is "". How to get the selected value by customer?

[kidunot89]

@hwsiew I said parent product, not parent attributes.
The attributes field on the Product is very different than the attributes field on ProductVariation.

I also cannot stress enough that you are using both product variations and product attributes in a way they are not designed for.

[hwsiew]

@kidunot89, I think i get your point. By the current design, they are correct. Rather than saying this is a bug, i would say an enhancement for CartItem.variation instead. Currently the type of CartItem.variation is set to ProductVariation. It is required to resolve ProductVariation Object from $source['variation_id']

wp-graphql-woocommerce/includes/type/object/class-cart-type.php

Lines 299 to 307 in 01df7b8

	'variation' => array(
	'type' => 'ProductVariation',
	'description' => __( 'Selected variation of the product', 'wp-graphql-woocommerce' ),
	'resolve' => function( $source, array $args, AppContext $context ) {
	return ! empty( $source['variation_id'] )
	? Factory::resolve_crud_object( $source['variation_id'], $context )
	: null;
	},
	),

However, according to WC, CartItem.variation is more likely a taxonomy-ish key-value pair as follow. Notice that, even though color attribute is set to Any, the customer selected value is in the cartitem data.

{
   "key":"9ab0ede7f3b012aaaccdad439979ebd9",
   "product_id":36,
   "variation_id":114,
  "variation":{
      "attribute_pattern":"Pattern 3",
      "attribute_size":"Large L",
      "attribute_pa_color":"blue"
   },
   "quantity":1,
   "data":{

   },
   "data_hash":"e8badf94e79d313381e705040724aa42",
   "line_tax_data":{
      "subtotal":[

      ],
      "total":[

      ]
   },
   "line_subtotal":30,
   "line_subtotal_tax":0,
   "line_total":30,
   "line_tax":0
}

Related portion of WC code ->
https://github.com/woocommerce/woocommerce/blob/41ff8ec073c312f0802156172cba87c6f5aecaa0/includes/wc-template-functions.php#L3538-L3570

[kidunot89]

@hwsiew See this comment.