CiviCRM Community Forums (archive)

We want to use the Contribution form to process offline donations (by credit card, check, or cash), but need to add fields that aren't allowed on the contribution form (receive_date, check_number, payment_instrument, source) and to overwrite the related contribution table fields when populated.  So,

1. How does one properly add a field with the buildForm hook?  Is there a function to do this, and does the .tpl need to be edited for the field to show?

2. Can existing contribution table fields (like receive_date, check_number, payment_instrument, source) be successfully overwritten with the postProcess hook?

Thanks for your response, Donald.

why dont u use the contribution form from the admin/backend?

If you mean, by the contribution form from the admin/backend, the form to enter a "New Contribution" or "Edit Contribution," we aren't using that because we want to add memberships and process credit cards with the same form.  It seems like the easiest way to have this all in one form is to use the User Contribution form, and find a way to add those missing fields and control where they're stored. 

check:

http://drupal.demo.civicrm.org/civicrm/contribute/add?reset=1&action=add&context=standalone
http://drupal.demo.civicrm.org/civicrm/contribute/add?reset=1&action=add&context=standalone&mode=live

Both of these links send me to an 'Access denied' page, even when signed in

1. you might want to read: http://en.flossmanuals.net/civicrm-developer-guide/

Thanks for the resource.  I looked through it, but couldn't find anything specific to adding fields through the buildForm function. 

I would very much appreciate any specific direction, or links to examples and/or available functions to use to:
1) add fields with the buildForm function (note: not custom data fields, as those will create new fields in the database), and
2) store the values of those fields in pre-existing contribution table fields with the postProcess function, overwriting what the form would normally write there, like the receive_date.

Thanks!