I have two different collection one is of order payment transaction and other one is of sales order as show below:


I want to combine them into single collection. Also where can I find payment method cause I don`t see it under orderData or transactionData collection.

  • What are you trying to find you get payment method details from order Commented Jun 22, 2018 at 15:52
  • Oh Okay I could`nt see in the collection when I was printing it but I fetched it by referring to the link below: magento.stackexchange.com/questions/156933/… Now the question is how should I merge/join the collection? Commented Jun 22, 2018 at 16:59

2 Answers 2


You can not merge two different collection in one

you can merge two same collection in one same as below example

$collection1 = Mage::getModel('catalog/category')->load(148)->getProductCollection();
$collection2 = Mage::getModel('catalog/category')->load(149)->getProductCollection();

$merged_ids = array_merge($collection1->getAllIds(), $collection2->getAllIds());
// can sometimes use "getLoadedIds()" as well

$merged_collection = Mage::getResourceModel('catalog/product_collection')
    ->addFieldToFilter('entity_id', array('in' => $merged_ids))

You can try one work around for your solution, you can create required field array from both collection and use it.

  • Oh Okay I`ll give a shot! Commented Jun 25, 2018 at 16:55

you can try below code to merge two collection in Magento Query

$mergeCollection = $transactionData->union(array($orderData));

you can use unionall to prevent duplicate records.

  • Your solution did`nt work for me! Commented Jun 25, 2018 at 16:55
  • is it showing any error ?? or you can not get result.
    – MR.R DNATH
    Commented Jun 25, 2018 at 17:59
  • Nope it is not showing any error but I cannot see any output when I var_dump it! Commented Jun 25, 2018 at 18:13
  • try echo $mergeCollection->getSelect()
    – MR.R DNATH
    Commented Jun 25, 2018 at 19:18
  • Still the same! Commented Jun 25, 2018 at 20:20

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