Setting variable inherited from parent resource in child resource script

Help Programming
1

Say if I have this parent resource script


Extends Resource

Class_name Item

@export var sellable: bool

And a child resource script:


Extends Item

Class_Name FoodItem

Is there a way for me to set sellable to true in the FoodItem script, so all resources that are created with the FoodItem script have sellable = true in the inspector by default?

I can’t set sellable to true in the Item script because not all resources that inherit from Item are sellable (eq. A QuestItem won’t be sellable), but I don’t want to have to manually tick the bool to true in the inspector every time I create a new FoodItem resource.
Same with exported enums and ints. Thanks!

2

You should be able to do this with the _init method, see here

1 Like
3

I had a read through of the documentation, but unfortunately I’m afraid I still don’t quite understand…

I tried doing this:

Extends Item

Class_Name FoodItem 

func _init(food_sellable = true):
    sellable = food_sellable

But whenever I make a new FoodItem, the sellable bool in the inspector still appears to be false.

4

Then I’d suggest making the init function for Item the same and calling it from FoodItem with the argument, like so:

extends Resource

class_name Item

@export var sellable: bool

func _init(food_sellable = false):
    sellable = food_sellable

extends Item

class_name FoodItem 

func _init(food_sellable = true):
    super(food_sellable)
5

That seemed to work! Thanks!!!

1 Like
6

Sorry, one more question…

What if I’m not trying to set a bool via _init(), but the first item in an array of enums instead? For example in the item script:


Extends Resource

Class_Name Item 

@export var item_type: Array[type]

Enum type{WEAPON, FOOD, OTHER}

I want the first thing in the item_type array in any FoodItems created to always be FOOD. I tried passing in an array as an argument in the script like this:


Func _init(food_type[0] = type.FOOD):
item_type[0] = food_type[0]

However, again, it’s not really working…and I’m getting a expected closing “)” after function parameters

7

The argument should be without the [0], but if the array is empty you need to add it with push_back instead, or item_type = [food_item]

8

Ermmm…sorry, I don’t think I get it. Can you give an example? Thanks :face_with_spiral_eyes:

9 
func _init(food_type = type.FOOD):
    item_type = [food_type]

Or

func _init(food_type = type.FOOD):
    item_type.push_back(food_type)
10

It worked!! I can’t thank you enough, I’ve been puzzling over this for days haha. Thank you so much!!!

1 Like
11

No problem! Happy it works!