new1
March 2, 2026, 8:58pm
1
4.6.1
I have been following this tutorial on inventory. https://www.youtube.com/watch?v=9CEUurKqfLQ&list=PLMQtM2GgbPEW__dODFVRPNF2TBry25IK4&index=5
All was working fine until I tried to add the collect function.
When I tried to find the problem, I am now seeing that my inventory is null.
I don’t understand because I am following the tutorial very closely, except for the hurt box (which I replaced)
Inventory script is a resource as seen below.
Does anyone know why the inventory is showing up as null? I placed the inventory array as an export on the player.
If you share code, please wrap it inside three backticks or replace the code in the next block:
@export var itemRes: InventoryItem
@onready var inventory: Inventory
func _on_area_2d_area_entered(other_area_2d: Area2D) -> void:
print("area entered")
collect(inventory)
queue_free()
func collect(inventory: Inventory):
inventory.insert(itemRes)
if inventory == null:
print("inventory is null!")
return
extends Resource
#maker tech #2
class_name Inventory
@export var items: Array[InventoryItem]
func insert(item: InventoryItem) -> void:
pass
baba
March 2, 2026, 9:04pm
2
Your .insert() function in the inventory is empty.
Follow the rest of the tutorial.
new1
March 2, 2026, 9:19pm
3
Does’nt work. It is the inventory part that is not working. It is showing null in members and local in the stack trace.
baba
March 2, 2026, 9:21pm
4
func insert(item: InventoryItem) → void:
Where it says pass: write
Items.append(InventoryItem)
Where do you initialize the variable inventory with an actual reference to an Inventory object?
new1
March 2, 2026, 9:23pm
6
Invalid call. Nonexistent function ‘insert’ in base ‘Nil’.
new1
March 2, 2026, 9:25pm
7
not sure if you mean this?
new1
March 2, 2026, 9:29pm
8
sorry misspoke
my items in the inventory array are resources
In the code you posted inventory is never initialized. That’s why it is null.
new1
March 2, 2026, 9:38pm
10
hmmmm, i followed the tutorial exactly and the only thing i changed was not including the func on_hurt_box_area_entered(area): if area.has_method(“collect”):
Well then, put that function back in and see if it works. If it doesn’t, it means that you didn’t follow it exactly or that the tutorial itself is broken.
new1
March 2, 2026, 9:44pm
12
i put it in. it is still getting stuck at the inventory function
You’ll have to revise the tutorial steps and check if you did everything as instructed.
new1
March 2, 2026, 9:54pm
14
unfortunately already did that, thanks for trying
The tutorial calls collect() from the player’s script, while you are trying to call it from the collectible item itself.
Yeah, you’ll need to do it yet again, paying more attention, because you likely missed something.
new1
March 2, 2026, 10:11pm
17
I placed it all in the player script instead, and it cant recognize the items now. it says null in items.
What do you mean by “all”? Only the part that calls collect() should be in the player script, the collect() function itself needs to stay in the item script.
Look again how the tutorial is writing that function. You need to call collect() on the area, and you surely don’t want to queue_free() the player.
