For now I'm using a crutch:

    @SubscribeEvent
    public static void onRegisterItems(final RegistryEvent.Register<Item> event)
    {
        final IForgeRegistry<Item> registry = event.getRegistry();
        PhoenixBlocks.BLOCKS.getEntries().stream()
                .map(RegistryObject::get)
                .filter(block -> !(block instanceof INonItem))
                .filter(block -> !(block instanceof FlowingFluidBlock))
                .forEach(block ->
                {
                    final Item.Properties prop = new Item.Properties().group(Phoenix.PHOENIX);
                    final BlockItem blockItem = new BlockItem(block, prop);
                    blockItem.setRegistryName(block.getRegistryName());
                    registry.register(blockItem);
                });
    }

It is not beautiful. How i can do it by DeferredRegister? 

Edited August 2, 20205 yr by WildTan

You can register BlockItems with DeferredRegister in the same way as normal Items. Since Blocks are registered before Items, just call RegistryObject#get on your RegistryObject<Block> in the Supplier.

 

I use these two utility methods to automatically register a BlockItem with the Block using DeferredRegister. RegistryUtil.getRequiredRegistryEntry just returns the registry entry from a RegistryObject or throws an exception if it's not present; but this isn't required in 1.15+ because RegistryObject#get already does this (it didn't in 1.14).

Edited August 2, 20205 yr by Choonster