1.20.1 Loot Table For Custom Crop DataGen Issue

[FuzzyAcornIndustries]

Hello, thank you for reading!

I am working with a custom crop that functions similar to potatoes in terms of drops. With what I have right now, when I run DataGen I get an error that says:

java.lang.IllegalStateException: Created block loot tables for non-blocks: [pokemonmd:blocks/oranian_berry_crop]

This seems to be a related to how I register my crop block here https://github.com/SpikybumJolteon/PokemonMD-1.20.1/blob/master/src/main/java/net/spikybumjolteon/pokemonmd/common/core/ModBlocks.java

private static <T extends Block> RegistryObject<T> registerNoItem(String name, Supplier<? extends T> sup) {
        return BLOCKS.register(name, sup);
    }

public static final RegistryObject<Block> ORANIAN_BERRY_CROP = registerNoItem("oranian_berry_crop",
            () -> new OranianBerryCropBlock(BlockBehaviour.Properties.copy(Blocks.POTATOES).noOcclusion().noCollission()));

When I switch registration to this function, DataGen works just fine but it creates the block in Creative Mode Tab:

private static <T extends Block> RegistryObject<T> register(String name, Supplier<? extends T> sup) {
        return register(name, sup, ModBlocks::itemDefault);
    }

    private static <T extends Block> RegistryObject<T> register(String name, Supplier<? extends T> sup, Function<RegistryObject<T>, Supplier<? extends Item>> itemCreator) {
        RegistryObject<T> ret = registerNoItem(name, sup);
        ITEMS.register(name, itemCreator.apply(ret));
        return ret;
    }

Here is the Loot Table DataGen I have https://github.com/SpikybumJolteon/PokemonMD-1.20.1/blob/master/src/main/java/net/spikybumjolteon/pokemonmd/datagen/ModLootTableProvider.java

LootItemCondition.Builder lootitemcondition$builder = LootItemBlockStatePropertyCondition
                    .hasBlockStateProperties(ModBlocks.ORANIAN_BERRY_CROP.get())
                    .setProperties(StatePropertiesPredicate.Builder.properties().hasProperty(OranianBerryCropBlock.AGE, OranianBerryCropBlock.MAX_AGE));

            this.add(ModBlocks.ORANIAN_BERRY_CROP.get(), this.applyExplosionDecay(ModBlocks.ORANIAN_BERRY_CROP.get(),
                    LootTable.lootTable().withPool(LootPool.lootPool()
                            .add(LootItem.lootTableItem(ModItems.ORANIAN_BERRY.get())))
                            .withPool(LootPool.lootPool().when(lootitemcondition$builder)
                                    .add(LootItem.lootTableItem(ModItems.ORANIAN_BERRY.get())
                                            .apply(ApplyBonusCount.addBonusBinomialDistributionCount(Enchantments.BLOCK_FORTUNE, 0.5714286F, 3))))
                            .withPool(LootPool.lootPool().when(lootitemcondition$builder).add(LootItem.lootTableItem(ModItems.REVIVE_SEED.get())
                                    .when(LootItemRandomChanceCondition.randomChance(0.9F))))));

What is the proper way to register the Crop Block so the DataGen Loot Table will run while still omitting the block from Creative Tab?

Apologies in advance if I am doing something wrong with this post or with Github, as I am very new to Github and only just returned to programming after 2 years since 1.15.

 

[FuzzyAcornIndustries]

Should I just try to change my Creative Tab item listing to suppress listing the Crop Block and just go with it generating an item block for it?

[deddybones]

It's an old thread but there is no posted answer and I was experiencing this mysterious error message today as well.
The error message in question:

java.lang.IllegalStateException: Created block loot tables for non-blocks:

This is triggered when a loot table is being generated for a block that is unknown to the builder. To tell the builder a block exists, you need to override the getKnownBlocks method. For example, consider the following class snippet where we define a DeferredRegister for blocks:

public class ModBlocks {
    public static final DeferredRegister<Block> BLOCKS =
            DeferredRegister.create(ForgeRegistries.BLOCKS, MOD_ID);   
      
    public static final RegistryObject<Block> MY_BLOCK = registerBlock("my_block",
            () -> new Block(BlockBehaviour.Properties.ofFullCopy(Blocks.GRANITE)));

    // ... Other blocks 
      
    public static void register(IEventBus eventBus) {
        BLOCKS.register(eventBus);
    }
}

We need to then tell the loot table builder that this block should have a loot table generated in our loot table generation class. This might look look like:

public class ModBlockLootTables extends BlockLootSubProvider {
    private final List<Block> VANILLA_BLOCKS_CHANGED = List.of(Blocks.CLAY);

    public ModBlockLootTables() {
        super(Set.of(), FeatureFlags.REGISTRY.allFlags());
    }

    @Override
    protected void generate() {
        // Some vanilla block with a loot table we are changing:
        this.add(Blocks.CLAY, block -> createSingleItemTableWithSilkTouch(block, Items.CLAY_BALL, ConstantValue.exactly(9.0F)));
        // Our block we are also defining a loot table for:
        this.dropSelf(ModBlocks.MY_BLOCK.get());
        
        // ... Other blocks
    }

    @Override
    protected @NotNull Iterable<Block> getKnownBlocks() {
        ArrayList<Block> iterableBlocks = new ArrayList<>(); // define empty list
        // Iterate through each block registered into ModBlocks.BLOCKS and add it into our list:
        ModBlocks.BLOCKS.getEntries().stream().map(RegistryObject::get).forEach(iterableBlocks::add);
        // The above line requires that we need to have defined a loot table for every block in ModBlocks.BLOCKS.
        // Also add the vanilla blocks we are updating:
        iterableBlocks.addAll(VANILLA_BLOCKS_CHANGED);

        return iterableBlocks;
    }
}

Note that in this example, I demonstrate additionally how if you are overwriting a loot table for a vanilla block, you must also tell the builder that vanilla block exists.

This solution does depend on some quirks of a developer's implementation; if you're looking for more detail, feel free to visit my GitHub for where these code snippets originate: Tech++

Hope this helps.

Edited April 1 by deddybones
Added some comments to the code

[FuzzyAcornIndustries]

Thank you so much for replying to this. I tried out your recommendation in place of what I had and it fixed my problem!

It helped me better understand streams/lambda and see what I had done wrong.