I m trying to write an Apex trigger and class, to update a list-price of a Product in a Pricebook, once a checkbox is clicked on the product object. Here is all of my code:

Class:

public class UpdatePriceBook {
    public static void UpdatePrice(Id productId, Id pricebookEntryId, Decimal newPrice){
         try {
            // Retrieve the product and pricebook entry
            Product2 product = [SELECT Id, Name FROM Product2 WHERE Id = :productId];
            PricebookEntry pricebookEntry = [SELECT Id, Product2Id, Pricebook2Id, UnitPrice FROM 
            PricebookEntry WHERE Id = :pricebookEntryId];

            // Update the price
            pricebookEntry.UnitPrice = newPrice;

            // Save the updated pricebook entry
            update pricebookEntry;

            System.debug( Price updated successfully for product:   + product.Name);
        } catch (Exception e) {
            System.debug( Error updating price:   + e.getMessage());
        }
    }
}

Trigger:

trigger UpdateProductPrice on Product2 (before insert) {
    if (Trigger.isBefore) {
        if (Trigger.isInsert || Trigger.isUpdate) {
            for (Product2 product : Trigger.new) {
                if (product.ProductPriceUpdate__c) {
                    // Get the relevant PricebookEntry for this product
                    List<PricebookEntry> standardPricebookEntries = [
                    SELECT Id, UnitPrice
                    FROM PricebookEntry
                    WHERE Product2Id = :product.Id
                    AND Pricebook2.Name IN ( USA Pricebook ,  International PB )
                    AND Product2.Name =  Cabinet 
                    AND Pricebook2.IsStandard = true
                    LIMIT 1
                     ];

//                    if (!pricebookEntries.isEmpty()) {
//                        Id pricebookEntryId = pricebookEntries[0].Id;
//                        Decimal newPrice = 1500; // Replace with your desired price
                    if (!standardPricebookEntries.isEmpty()) {
                        PricebookEntry standardPricebookEntry = standardPricebookEntries[0].id;
                        Id pricebookEntryId = pricebookEntries[0].Id;
                        Decimal newPrice = 1500; // Replace with your desired price
                        
                        standardPricebookEntry.UnitPrice = newPrice;
                        UpdatePriceBook.UpdatePrice(product.Id, pricebookEntryId, newPrice); // Replace with your desired price
                    }
                }
            }
        }
    }
}

我所困的是——我需要获得标准。 缩略语 价格指数

I didn t realize when I started writing the code - that I was trying to modify the PricebookEntry object, but that isn t correct because the list price is a standardPricebookEntry field, not a PricebookEntry field, so that s how I have this line of code:

Id pricebookEntryId = pricebookEntries[0].Id;

但是,如果我想要改变,它就属于标准类型。 价格 加入:

PricebookEntry standardPricebookEntry = standardPricebookEntries[0].Id;

我发现这一错误:“从Id到PbookEntry进行非法转让”。

Thats because its assigning an id value to a PricebookEntry variable. But I do need the Id value - to pass to the class method - it s expecting to get an Id type parameter. What can I add to the code, or how can I modify it, to do what I described in the beginning of the question?