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I am using commerce_donate module and I want to add a product (type=donation) into cart programmatically with the amount set as per the user has already selected on some other page. On some custom form submit, I want to add this donation type product into cart in order to process the usual commerce order / checkout.

How can I achieve this ?

Thanks.

2 Answers 2

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No code needed, just watch the video about "Donations with Custom Line Item Types in Drupal Commerce". Some more details about it (= quote from that link):

This screencast shows how to use a custom line item type to allow your customer to specify a user-defined amount to donate. The line item has a Donation Amount field on it, and we then create a product display node that uses that custom line item. Finally, we use a custom rule to update the "price" of the donation product to the amount the customer has chosen.

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  • @Travis please check my edited version of your answer, attempting to improve your link-only answer. Feel free to further enhance it, of if ou don't like my edit at all simply perform a rollback ... Oct 12, 2016 at 15:20
  • That looks and sounds great @Pierre.Vriens, thanks for clarifying it! Oct 12, 2016 at 15:20
  • @TravisJohnston : ok, merci for "approve", but know that most of my edit (clarification) was a copy/paste from that link you first posted. Oct 12, 2016 at 15:24
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In the form submit

function custom_form_submit($form,$form_state) {
  $line_item = commerce_product_line_item_new(commerce_product_load($pid));
  commerce_cart_product_add($account->uid, $line_item);
  drupal_goto('cart');
}
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  • This is adding the product but with the price added in the backend. How do I modify/update the price using this code. ? Oct 4, 2016 at 11:55

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