Argument 3 passed to ProductAdditional::__construct() must be of the type string, array given, when place order with fe-variant
Bug Report
Current Behavior When placing an order with a fe-variant product. It throws a fatal error
Expected behavior/output A clear and concise description of what you expected to happen.
Environment
- TYPO3 version(s): [10.4.15]
- cart version: [e.g. 7.2.0]
- Is your TYPO3 installation set up with Composer (Composer Mode): yes
- OS: Untuntu, DDEV
Additional context
Issue: 1
See: 
When you place an order it's throwing constructor invalid argument. I found OrderUtility.php Line 538 value is a passing empty.
So, argument here does not meet valide.
Issue: 2 In the product in the cart, It showing array in the title of the product.
See:

Any fix?
Can't reproduce this error. Can you give me some more Information about your product and its configuration? How does the request looks like, when a product with frontend variants is submitted to cart.
Hi,
Okay, I have a pretty fresh setup with TYPO3 10.4.15 + Bootstrap package (11.0.3) with DDEV (PHP 7.2). I have EXT:cart version 7.2.0 (Also, 7.1.8 having same error) and EXT:cart_product version 3.0.0. For setup, facing issue with composer and non-composer mode both.
- I have added some products in the storage folder with fe-variant as I said.
- Created product list page (Working great!)
- On detail page, I have added quantity 5 and default text description for fe-variant, see.
- Go to cart page, you will notice it's showing array array in the product name here
- Fill the order form and submit it. It will show you error type casting for argument, see.
- After fixing this issue manually, it will show you the actual error, See here.
Here is XHR info:
General:
Request URL: https://typo-x.ddev.site/product/cart?tx_cart_cart%5Baction%5D=create&tx_cart_cart%5Bcontroller%5D=Cart%5COrder&cHash=9dadc311e3ca986dc55508139c72b62b
Request Method: POST
Status Code: 500
Remote Address: 127.0.0.1:443
Referrer Policy: strict-origin-when-cross-origin
Response header:
cache-control: no-cache, must-revalidate
content-type: text/html; charset=UTF-8
date: Sun, 23 May 2021 10:42:40 GMT
expires: 0
last-modified: Sun, 23 May 2021 10:42:39 GMT
pragma: no-cache
server: nginx/1.17.10
Request header:
:authority: typo-x.ddev.site
:method: POST
:path: /product/cart?tx_cart_cart%5Baction%5D=create&tx_cart_cart%5Bcontroller%5D=Cart%5COrder&cHash=9dadc311e3ca986dc55508139c72b62b
:scheme: https
accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/avif,image/webp,image/apng,*/*;q=0.8,application/signed-exchange;v=b3;q=0.9
accept-encoding: gzip, deflate, br
accept-language: en-US,en;q=0.9,gu-IN;q=0.8,gu;q=0.7,de;q=0.6
cache-control: max-age=0
content-length: 2355
content-type: application/x-www-form-urlencoded
cookie: cookieconsent_status=dismiss; pma_lang_https=en; be_typo_user=c1e27dc40866a5a69902f04e6926ada4; fe_typo_user=acb8c0d3677b5d9072d5f917793903e0; Typo3InstallTool=fcf0d66af2a5860ca3a59f5c20246823
origin: https://typo-x.ddev.site
referer: https://typo-x.ddev.site/product/cart
sec-ch-ua: " Not A;Brand";v="99", "Chromium";v="90", "Google Chrome";v="90"
sec-ch-ua-mobile: ?0
sec-fetch-dest: document
sec-fetch-mode: navigate
sec-fetch-site: same-origin
sec-fetch-user: ?1
upgrade-insecure-requests: 1
user-agent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/90.0.4430.212 Safari/537.36
Query string parameters:
tx_cart_cart[action]: create
tx_cart_cart[controller]: Cart\Order
cHash: 9dadc311e3ca986dc55508139c72b62b
Form Data:
tx_cart_cart[__referrer][@extension]: Cart
tx_cart_cart[__referrer][@controller]: Cart\Cart
tx_cart_cart[__referrer][@action]: show
tx_cart_cart[__referrer][arguments]: YTowOnt9a81dd8f12231e6e646498cb550395bacdbeb43a7
tx_cart_cart[__referrer][@request]: {"@extension":"Cart","@controller":"Cart\\Cart","@action":"show"}c79687f3de13fec69380f8ae4d4146838b241d02
tx_cart_cart[__trustedProperties]: {"billingAddress":{"salutation":1,"title":1,"firstName":1,"lastName":1,"email":1,"company":1,"taxIdentificationNumber":1,"street":1,"zip":1,"city":1,"country":1},"orderItem":{"shippingSameAsBilling":1,"acceptTermsAndConditions":1,"acceptRevocationInstruction":1,"acceptPrivacyPolicy":1,"comment":1},"shippingAddress":{"salutation":1,"title":1,"firstName":1,"lastName":1,"email":1,"company":1,"street":1,"zip":1,"city":1,"country":1}}aa84e93a446692ee11110864e5ac747db005038e
tx_cart_cart[billingAddress][salutation]: Mr
tx_cart_cart[billingAddress][title]: dfg
tx_cart_cart[billingAddress][firstName]: GHANSHYAM
tx_cart_cart[billingAddress][lastName]: BHAVA
tx_cart_cart[billingAddress][email]: [email protected]
tx_cart_cart[billingAddress][company]: Devzspace
tx_cart_cart[billingAddress][taxIdentificationNumber]:
tx_cart_cart[billingAddress][street]: 32, Mer street, Kalsar, mahuva
tx_cart_cart[billingAddress][zip]: 364130
tx_cart_cart[billingAddress][city]: BHAVNAGAR
tx_cart_cart[billingAddress][country]: de
tx_cart_cart[orderItem][shippingSameAsBilling]:
tx_cart_cart[orderItem][shippingSameAsBilling]: true
tx_cart_cart[orderItem][acceptTermsAndConditions]:
tx_cart_cart[orderItem][acceptTermsAndConditions]: 1
tx_cart_cart[orderItem][acceptRevocationInstruction]:
tx_cart_cart[orderItem][acceptRevocationInstruction]: 1
tx_cart_cart[orderItem][acceptPrivacyPolicy]:
tx_cart_cart[orderItem][acceptPrivacyPolicy]: 1
tx_cart_cart[orderItem][comment]: dfgdfg
Does this help? I hope so ;) I am trying to figure out keep you updated if I will found any solution!
Ohh sorry, I wasn‘t specific enough. When I ask for the request, I was thinking about the „add to cart“ action. I'm wondering about the fact that it says "array" for the frontend variants in the shopping cart.
Thank you for your detailed information. I hope I can reproduce the error and fix it.
Can you please send me the request of the "add to cart" action?