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[1.19.2] Best practical way to save entity data?


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Firstly is this thread relevant?

Secondly, if you have an opinion on this, make it known please. I'm looking for a practical way to save entity data. If you want to see my entity class, it's below. I'm looking to save the serum variable. What I have right now works fine but it does not save across world joins.

public abstract class Dinosaur extends Animal {
	static final EntityDataAccessor<Integer> serum = SynchedEntityData.defineId(Dinosaur.class, EntityDataSerializers.INT);
	protected Dinosaur(EntityType<? extends Animal> e, Level l) {
		super(e, l);
	public boolean isJuvenile() {
		return this.isBaby() && this.getSerum() > 0;
	public void tick() {
		if (this.getSerum() >= 4) {
			this.age = 0;
			if (this.isBaby()) {
		else {
			if (!this.isBaby()) {
			this.age = -20;
	public void defineSynchedData() {
		this.entityData.define(serum, 0);
	public void addSerum() {
		int s = this.getSerum();
		this.getEntityData().set(serum, s);
	public int getSerum() {
		return this.getEntityData().get(serum);

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Override add/readAdditionalSaveData()


If you don't post your logs/debug.log we can't help you. For curseforge you need to enable the forge debug.log in its minecraft settings. You should also post your crash report if you have one.

If there is no error in the log file and you don't have a crash report then post the launcher_log.txt from the minecraft folder. Again for curseforge this will be in your curseforge/minecraft/Install

Large files should be posted to a file sharing site like https://gist.github.com  You should also read the support forum sticky post.

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