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Here's my issue. During user register I'm adding fields via form_alter and creating a stripe account. When validation fails $form_state gets wiped out and when the user passes through validation again a second account gets created.

I'm thinking about using cache_set to hang on to the account info until the user gets through the registration process error free but is there a better way to do this?

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It sounds like before your mymodule_form_validation($form, &$form_state) function returns you want to store the Stripe information in the users $_SESSION array as a valid attempt/data.

You write to user session using the global session value in PHP and Drupal adds it to the Users' DB/Mongo user session info at the end of page execution. For example:

// in your form validation code ...
$_SESSION['stripe_username'] = 'john_doe';

On form load simply prepopulate the form data from $_SESSION. Eg, you're stuffing the content into session because it will be wiped on form reload -- then you're replacing it so a 2nd account isnt created.

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  • I thought about using sessions for this but I don't know how sensitive the customer id is to stripe (really the only thing I want to persist). – Jim Stamper Jun 20 '13 at 22:35
  • Reading up on sessions again and this may be the easiest way to go and it's not nearly as insecure as I thought it might be. – Jim Stamper Jun 20 '13 at 22:51
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Another option for this particular use case may be

To set the form value during validation.

Use this function to change the submitted value of a form element in a form validation function, so that the changed value persists in $form_state through the remaining validation and submission handlers.

For example, on validation error, you could store the stripe ID in a '#type' => 'value' form element and thereby make it available for the subsequent request.

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  • It won't work. FAPI will only persist things with a #default_value. So hidden elements and the $form_state['values'] array get blown away when the form is rebuilt after failed validation. You can do some trickery with $form_state['rebuild'] = true but I would prefer to keep this as straightforward as possible. The key here is the last part of the sentence - through the remaining validation and submission handlers.. See form_builder. – Jim Stamper Jun 21 '13 at 13:13

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