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Adobe AD0-E716 Exam - Topic 1 Question 63 Discussion

Posted by Candida on Jul 01, 2026 at 02:10 AM

An Adobe Commerce Developer is tasked with creating a custom form which submits its data to a frontend controller They have decided to create an action and have implemented the \Magento\Framework\App\Action\HttpPostActioninterface class, but are not seeing the data being persisted in the database, and an error message is being shown on the frontend after submission.

After debugging and ensuring that the data persistence logic is correct, what may be cause and solution to this?

Suggested Answer: C

According to the Magento Stack Exchange answer, form key validation is a security feature that prevents CSRF attacks by checking if the form key in the request matches the one generated by Magento. If the developer does not include the form_key in their custom form, the validation will fail and an error will be shown. Therefore, the developer needs to add the form_key to their requests by using <?= $block->getBlockHtml ('formkey') ?> in their template file. Verified Reference: https://magento.stackexchange.com/questions/95171/magento-2-form-validation


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21 comments · newest first
MA
Margart 30 days ago
Yeah, definitely. Always check the form key first!
EL
Elvera 1 month ago
I’d go with C then. It’s a common mistake.
MA
Margart 1 month ago
Right! If the form key is missing, it won't work.
EL
Elvera 2 months ago
True, but what about form key validation? C could be the reason too.
MA
Margart 2 months ago
I feel like B is the issue. Missing validatePostDataQ could cause problems.
EL
Elvera 2 months ago
This question is tricky. I think option A makes sense.
DE
Delisa 2 months ago
Yeah, definitely. Always check the form key first!
DE
Denny 2 months ago
I’d go with C then. It’s a common mistake.
DE
Delisa 2 months ago
Right! If the form key is missing, it won't work.
DE
Denny 3 months ago
True, but what about form key validation? C could be the reason too.
DE
Delisa 3 months ago
I feel like B is the issue. Missing validatePostDataQ could cause problems.
DE
Denny 3 months ago
This question is tricky. I think option A makes sense.
LU
Luis 3 months ago
Yup, C is the way to go, had the same issue before!
SH
Shelia 3 months ago
Wait, are we sure about C? I thought form keys were optional.
TO
Tomas 3 months ago
B sounds right, forgot to validate the data probably.
LA
Lanie 4 months ago
A is definitely not true, POST requests can work with frontend controllers.
HI
Hillary 4 months ago
I think option C makes sense, form key validation is crucial.
JA
Jacqueline 4 months ago
I feel like I’ve seen something about form keys being required for non-AJAX requests. Maybe that’s what’s going wrong here?
JO
Joesph 4 months ago
I practiced a similar question before, and I think Magento does allow POST requests, so option A seems unlikely.
KR
Kris 4 months ago
I’m not entirely sure, but I think if the validatePostData method is missing, it could definitely cause issues. That sounds like option B.
MO
Mose 4 months ago
I remember something about form key validation being crucial for POST requests in Magento. Could it be option C?
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