This function searches each
Players for one whose
Player/UserId matches the given UserId. If such a player does not exist, it simply returns
nil. It is equivalent to the following function:
local Players = game:GetService("Players") local function getPlayerByUserId(userId) for _, player in pairs(Players:GetPlayers()) do if player.UserId == userId then return player end end end
This method is useful in finding the purchaser of a developer product using
MarketplaceService/ProcessReceipt, which provides a table that includes the purchaser’s UserId and not a reference to the Player object itself. Most games will require a reference to the player in order to grant products.
The player with the specified
This code sample illustrates a
MarketplaceService/ProcessReceipt|ProcessReceipt callback function for a game to handle purchasing of two
Articles/Developer Products In Game Purchases|developer products (more can be added as needed). It properly checks for and records purchases using a
GlobalDataStore called “PurchaseHistory.”
Most importantly, it properly returns
Enum.ProductPurchaseDecision.PurchaseGranted when the transaction is successfully completed or if it’s detected that the purchase has already been granted using the “PurchaseHistory” data store.