When you try to post a multi-value webform field to a multi-select field in Pardot, the value does not sync at all. This is because Guzzle/PHP encodes the array values with [] notation, e.g. ['foo' => ['bar', 'baz']] is encoded like foo[0]=bar&foo[1]=baz
Add a webform "checkboxes" field that syncs to a pardot multi-select picklist, check multiple values in the webform, and submit. The checked values are not posted to Pardot.
Pardot expects multi-select values to be sent without [] notation, e.g. ['foo' => ['bar', 'baz']] should be encoded like foo=bar&foo=baz
Needs work
2.0
Code
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It's likely this issue predates Contrib.social: some issue and comment data are missing.
FYI, we are using a work-around for this issue.
In the `Mapping of webform fields to Pardot fields` settings, we map the multi-select fields to individual fields:
multiselect_.option1|multiselect_option1
multiselect_.option2|multiselect_option2
multiselect_.option3|multiselect_option3
etc...
Not the most elegant solution, but it does work.