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I use drupal 7 and latest civicrm.

I direct people to my form using the checksum. I would like to not display email field and GDPR opt in field if they arrive at the form via checksum. If they arrive at the form without checksum I would like email/opt in to be visible.

I know how to use conditionals within the form (eg if email address is present then display field X) but I can’t work out how to do it from the initial check sum - I feel it ought to be possible. Can anyone help?!

Thanks!

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2 Answers 2

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I think this is possible with the below adjustments on the webform.

  • Add a disabled textfield on your webform and set its default value to a token or checksum value from the URL.

  • Now, add the condition on this element to hide email when it's value is not blank.

Update after Karing's comment - If you need to hide the field from the webform, maybe use a little css like display:none for the same.

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    And you can always add other values to the webform link like ?myvar=1&cs=xxxx
    – RayWright
    Commented Jun 11, 2018 at 13:38
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    Hello very helpful people! Thank you! I fear I need a little more! Jitendra - I can create a private civicrm field is that what you mean when you say hidden? When I created a private civicrm checksum field I couldn't get the conditional thing to work (I only had the option of is shown/is not shown and as the field was private it seemd to think it was always not shown). I wonder if you could elaborate a little more?
    – Caroline B
    Commented Jun 11, 2018 at 19:33
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    Karin G - by this do you mean under the civicrm webfom tab select checksum - I did that and marked it private but as above couldn't get the conditional to recognise when an individual had one and when they didn't
    – Caroline B
    Commented Jun 11, 2018 at 19:38
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    RayWright - how do I do that - that sounds very useful! Thank you!
    – Caroline B
    Commented Jun 11, 2018 at 19:38
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    Yes you can not make the field private or you can’t use conditionals on it if you want to hide it - use some css display:none
    – KarinG - Semper IT
    Commented Jun 13, 2018 at 2:33
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You can use hook_form_alter and in hook check if URL parameter for checksum is present then you can remove specific webform form elements like this:

$form['submitted']['element_form_key']['#access'] = FALSE;

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