For one of our projects, we were adding some grouped products in the “Opportunity Products” object through our custom visualforce page.
This seemed a very simple technical implementation. Though it would give us ‘NULL’ reference error when our custom page would try to insert the product records in the opportunity. However, it worked seamlessly for the standard quote line items page (refer to the screen shot below).
When we dug into the issue we discovered that there was a cutom trigger (before insert) written on the “Opportunity Products”. This trigger was referencing the “List Price” of the product, a formula field based on the Price book entry, which was not available in the before insert operation. Therefore, every logic written on the basis of this field would fail.
This issue can be easily resolved, all one needs to do is, query all the values for formula fields for the records to be inserted before you start processing the records in the trigger.
Happy Coding !!
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