Hello, I am currently making my first mod and am currently struggling with tile entities. When the block is placed it is working fine, however, if i save and quit to title and start the world again, the completionBlocks list does not have anything in it. 

I tried placing breakpoints on CompletionBlockTileEntity#write and CompletionBlockTileEntity#read, and noticed read is not triggered when the world is loaded so I guess that is why completionBlocks is empty?

 

How do I solve this problem? Is this even the proper way of storing data for a tile entity? I read stuff about capabilities but don't really see why that should be used here.

 

My TileEntity

public class CompletionBlockTileEntity extends TileEntity {
    public List<MyVector> completionBlocks = null;

    private final String delimiter = "_";
    private final String nbtName = "locations";

    public CompletionBlockTileEntity() {
        super(BorisRegistry.completion_block_entity.get());
        if(completionBlocks == null) {
            completionBlocks = new ArrayList<>();
        }
    }
  
    ...
  
    // region Storage
    private String listToString() {
        return completionBlocks.stream().map(MyVector::toStringRounded).collect(Collectors.joining(delimiter));
    }

    private List<MyVector> stringToList(String string) {
        return Arrays.stream(string.split(delimiter)).map(MyVector::new).collect(Collectors.toList());
    }

    @Override
    public CompoundNBT write(CompoundNBT nbt) {
        nbt.putString(nbtName, listToString());
        return nbt;
    }

    @Override
    public void read(CompoundNBT nbt) {
        completionBlocks = stringToList(nbt.getString(nbtName));
    }
    // endregion
}

 

The code that sets completionBlocks.

    public void Spawn() {
        if(!world.isRemote) {
            for (Map.Entry<MyVector, BlockState> entry : structure.entrySet()) {
                BlockPos position = entry.getKey().Add(this.coordinates).toBlockPos();
                BlockState block = entry.getValue();
              
                ...
              
                if(block == BorisRegistry.completion_block.get().getDefaultState()){
                    completionBlocks.add(new MyVector(position));
                }
            }

            for(MyVector blockloc : completionBlocks) {
                CompletionBlockTileEntity cbte = (CompletionBlockTileEntity) this.world.getTileEntity(blockloc.toBlockPos());
                cbte.completionBlocks = completionBlocks;
                cbte.markDirty();
            }
        }
    }

 

Edited May 17, 20205 yr by wefewdsad

6 minutes ago, diesieben07 said:

You must call super in both read and write.

Wow that solved it, cant believe it was that simple. Thank you very much!

 

40 minutes ago, wefewdsad said:

Wow that solved it, cant believe it was that simple. Thank you very much!

 

You should have a look at its implementation in the super class when you override a method. In most case, you need to call the super method.