AssetDatabase.IsMainAsset

Parameters

Returns

bool True if the asset is a main asset. Otherwise, false.

Description

Checks whether an asset object is the main asset of its file in the Project window.

A file can contain several assets, but only one of them is the main asset. For example, an imported model contains a root GameObject, meshes, and child GameObjects. The root GameObject is the main asset.

using UnityEditor;
using UnityEngine;

public class Scriptable : ScriptableObject
{
}

public class AssetDatabaseExamples : MonoBehaviour
{
    [MenuItem("AssetDatabase/Is Main Asset Example")]
    static void IsMainAssetExample()
    {
        var materialAsset = new Material(Shader.Find("Standard"));

        //materialAsset is still in memory, therefore this will be False
        Debug.Log(AssetDatabase.IsMainAsset(materialAsset));

        //Create a Scriptable object
        var scriptableAssetPath = "Assets/ScriptableObjects/NewObject.asset";
        var mainAsset = ScriptableObject.CreateInstance<Scriptable>();
        AssetDatabase.CreateAsset(mainAsset, scriptableAssetPath);

        //Add the Material Asset to the Scriptable object, so that the Material becomes a Sub Asset of the Scriptable object
        AssetDatabase.AddObjectToAsset(materialAsset, scriptableAssetPath);
        AssetDatabase.SaveAssets();

        //This will be false because material asset has been added to the main Asset and is now a Sub Asset
        Debug.Log(AssetDatabase.IsMainAsset(materialAsset));

        //Remove the subAsset from the Scriptable object and create it as an Asset
        AssetDatabase.RemoveObjectFromAsset(materialAsset);
        AssetDatabase.CreateAsset(materialAsset, "Assets/Materials/New Mat0.mat");

        //This will be True because the material is now the main Asset
        Debug.Log(AssetDatabase.IsMainAsset(materialAsset));
    }
}

Parameters

Returns

bool True if the asset is a main asset. Otherwise, false.

Description

Checks whether the asset with the specified EntityId is the main asset of its file in the Project window.

A file can contain several assets, but only one of them is the main asset. For example, an imported model contains a root GameObject, meshes, and child GameObjects. The root GameObject is the main asset.

Parameters

Returns

bool True if the asset is a main asset. Otherwise, false.

Description

Checks whether the asset with the specified instance ID is the main asset of its file in the Project window.

This overload is obsolete. Use the overload that takes an EntityId instead.