Question by phineliner · Oct 22, 2015 at 12:05 PM · prefab script.inspector runtime-generation

Assigned Prefab to generic Script in Inspector is lost at runtime - Intended or bug?

Hello there,

I'm currently trying to instantiate a prefab via script. The thing is, that the instance of the gameobject holding the script is generated at runtime. Thus I can not drag the prefab to the component of the gameobject. I know I can load a prefab via Resources.Load but I was wondering why the following approach doesn't work:

I select the script in the Project View (not Hierarchy!), which shows the script in the inspector: alt text There you can see the prefab attribute. So I assumed it would work to assign the prefab to the script in general, independent of the gameobject which will have it as component.

However, on runtime the prefab is null: "ArgumentException: The thing you want to instantiate is null."

Is this the intended behavior, am I missing something, or is this a bug?

Cheers, phineliner

P.S.: It works when I load the prefab via Resources.Load(). So the code seems okay.

=====================================================================

edit: I am aware of how to achieve the desired thing (e.g. attach component and prefab in another prefab or using Resources.Load()). However, my question is:

Is the described behavior intended or a bug?

The placeholder on the script-file looks like it is exactly for this purpose and I can't think of any other purpose. I am wondering why it doesn't work as expected and why the possibility of dragging & dropping something to the script-file directly is given, when it loses (doesnt remember) it on runtime.

script-prefab.jpg (21.1 kB)

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phineliner · Oct 22, 2015 at 05:05 PM 0

has nobody tried this before?

vintar · Oct 22, 2015 at 05:56 PM 0

I`ve seen this too. I was totally excited when I noticed how you can drag something onto a script, but it is forgotten when you press play. No idea why they even show up there.

entity476 · Oct 22, 2015 at 08:00 PM 0

If I may ask, is the gameobject holding the Settings$$anonymous$$anager script, also a prefab, which is instantiated in run time? Or, maybe, an empty gameobjec, created on runtime, on which you call the GetComponent(Settings$$anonymous$$anager) function in order to attach the Settings$$anonymous$$enu behaviour?

phineliner entity476 · Oct 22, 2015 at 08:51 PM 0

Hi .entity. It's an empty gameobject to which I add the Settings$$anonymous$$anager component at runtime.

 GameObject go= new GameObject();
 go.AddComponent<Settings$$anonymous$$anager>();

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meat5000 ♦ · Oct 23, 2015 at 10:02 AM 0

If you instantiating from a prefab, after you drop the script in to the placeholder, click Apply. If this doesn't work it's apparent that Prefabs dont like remembering such things.

Your AddComponent approach will work, why not use it?

 GameObject myGO = Instantiate(Prefab);
 
 myGO.AddComponent(SomeScript);

phineliner meat5000 ♦ · Oct 23, 2015 at 10:29 AM 0

Hi and thanks for your suggestion. I'm aware of that your suggestion works. However I was asking why my approach doesn't. I'm not sure if the in the question described behavior is intended or a bug, since the placeholder on the script-file looks like it is exactly for this purpose and I can't think of any other purpose.

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Assigned Prefab to generic Script in Inspector is lost at runtime - Intended or bug?

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