Why is the value of my prefab variable being saved, and why is it different in the update and spawn method?,How to not save the value of a variable in a prefab object

Question

Good day everyone,

I am having some trouble with the values of my variables being saved in my prefab and I do not want this. I am trying to make a turn-based tactics game and every time I play and exit the game one of my values does not change. This object is a prefab, but for some reason, it doesn't save the values of my variables on my other prefabs.

Here is my code:

 [SerializeField] GameObject basicRiflemanPrefab;
 [SerializeField] bool unitsBuiltThisTurn = false;
 
 // Start is called before the first frame update
 void Start()
 {
     this.unitsBuiltThisTurn = false;
 }

 // Update is called once per frame
 void Update()
 {
     Debug.Log("units built this turn:" + this.unitsBuiltThisTurn);
 }

 public void SpawnBasicRifleman()
 {
     Debug.Log("Units created: " + this.unitsBuiltThisTurn);
     Debug.Log("Selected ID: " + scrSelection.selected + " This ID: " + this.transform.gameObject.GetInstanceID());
     if (!this.unitsBuiltThisTurn && scrSelection.selected == transform.gameObject.GetInstanceID())
     {
         Instantiate(basicRiflemanPrefab, new Vector3(transform.position.x, transform.position.y, transform.position.z-3), new Quaternion(0, 0, 0, 0));
         this.unitsBuiltThisTurn = true;
     }
     /*else if (unitsBuiltThisTurn && scrSelection.selected == transform.gameObject.GetInstanceID())
         Debug.Log("This building cannot train anymore units this turn.");
     else
         Debug.Log("There is a different building selected: "+scrSelection.selected+" Units ID: "+this.transform.gameObject.GetInstanceID());*/
 }

When I look at the log that is called during the update method it shows it is false, however when I call the method for spawning the rifleman that log returns true. and I have no idea why. Even when I restart the game. I have tried making the variable private, public, and serializefield. Could it be calling the script on the prefab and not the object?

Answer 1

Answer by seanwiemken · May 18, 2021 at 04:41 PM

So I found out a little bit as to what is going on. But I am still unsure as to how to fix it. I am calling the method to spawn the rifleman from a button and to access the method I dragged the prefab of the barracks into the object slot for the button. So it seems that when I call the method it is calling the one that is attached to the button only. Does anyone have any ideas on how I can fix this? I have thought about using hashtables or ArrayLists, but I am not sure how I would create a reference to the object unless I use the instantiate function.

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logicandchaos · May 18, 2021 at 04:57 PM 1

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To make a reference you must declare one as a variable in a script and to assign it you can drag and drop, find or other methods.

seanwiemken · May 18, 2021 at 06:36 PM 0

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Okay thanks, what do I need to make the find method work?

seanwiemken · May 18, 2021 at 09:41 PM 0

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@logicandchaos Thank you for recommending the find method! I was able to fix the issue by assigning the game object in a hashtable and comparing the id to that of the selected object. Then using the reference stored in the hashtable I could manipulate the correct data and get it to do what I needed it to.

Why is the value of my prefab variable being saved, and why is it different in the update and spawn method?,How to not save the value of a variable in a prefab object

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