I created an item "Copper Ingot" whose tag is "forge:ingots/copper". I made a constant which contains that tag.

public final class ForgeItemTags
{
	public static final Tag<Item> COPPER_INGOT = ItemTags.getCollection().getOrCreate(new ResourceLocation("forge", "ingots/copper"));
	
	private ForgeItemTags() {}
}

And I used Ingredient.fromTag() method to set all copper ingots, including my copper ingot, to be repair materials of copper tools.

public enum BiomeOreItemTier implements IItemTier
{
	COPPER(2, 223, 5.7F, 2.0F, 15, Ingredient.fromTag(ForgeItemTags.COPPER_INGOT));
	
	private final int harvestLevel;
	private final int maxUses;
	private final float efficiency;
	private final float attackDamage;
	private final int enchantability;
	private final Ingredient repairMaterial;
	
	BiomeOreItemTier(int harvestLevel, int maxUses, float efficiency, float attackDamage, int enchantability, Ingredient repairMaterial)
	{
		this.harvestLevel = harvestLevel;
		this.maxUses = maxUses;
		this.efficiency = efficiency;
		this.attackDamage = attackDamage;
		this.enchantability = enchantability;
		this.repairMaterial = repairMaterial;
	}
	
	/...
}

Then I used the COPPER ItemTier to make my copper sword.

public static final Item COPPER_SWORD = register("copper_sword", new SwordItem(BiomeOreItemTier.COPPER, 3, -2.4F, new Item.Properties().group(BiomeOreItemGroup.BIOME_ORE_TOOL)));

But in the game, I cannot repair my sword using my copper ingot. I can't figure out what is wrong with my codes. When I printed the item tag of my copper ingot using onItemRightClick() method in Item class the ingot had the tag "forge:ingots/copper". But it cannot repair my copper tools. How can I fix it?

while you created the tag, the tag is not filled with anything. For that you must create this json "resources/forge/tags/items/ingots/copper.json" and fill it with

{
  "replace": false,
  "values": [
    "modid:yourCopperIngot"
  ]
}

 

Edited July 31, 20196 yr by cheaterpaul

58 minutes ago, cheaterpaul said:

while you created the tag, the tag is not filled with anything. For that you must create this json "resources/forge/tags/items/ingots/copper.json" and fill it with

{
  "replace": false,
  "values": [
    "modid:yourCopperIngot"
  ]
}

 

Of course I made that file, but it didn't work.

you need to call super() inBiomeOreItemTag and extends TieredItem

Edited July 31, 20196 yr by cheaterpaul

while i cant see your whole code, this works for me:

package com.example.examplemod;
*imports
@Mod("examplemod")
public class ExampleMod
{
    public static Tag<Item> coppertag = new ItemTags.Wrapper(new ResourceLocation("forge", "ingots/copper"));
    public ExampleMod() {
    }
    @Mod.EventBusSubscriber(bus=Mod.EventBusSubscriber.Bus.MOD)
    public static class RegistryEvents {
        @SubscribeEvent
        public static void onItemRegistry(final RegistryEvent.Register<Item> blockRegistryEvent) {
            blockRegistryEvent.getRegistry().register(new Item(new Item.Properties().group(ItemGroup.BREWING)).setRegistryName("examplemod:copper"));
            blockRegistryEvent.getRegistry().register(new SwordItem(new Tier(),4,1,new Item.Properties().group(ItemGroup.BREWING)).setRegistryName("examplemod:coppersword"));
        }
    }

    public static class Tier implements IItemTier{
        @Override
        public int getMaxUses() {
            return 100;
        }

        @Override
        public float getEfficiency() {
            return 4;
        }

        @Override
        public float getAttackDamage() {
            return 2;
        }

        @Override
        public int getHarvestLevel() {
            return 1;
        }

        @Override
        public int getEnchantability() {
            return 50;
        }

        @Override
        public Ingredient getRepairMaterial() {
            return Ingredient.fromTag(coppertag);
        }

        public Tier() {
        }
    }
}

 but i think the problem is that you need

public static final Tag<Item> COPPER_INGOT = new ItemTags.Wrapper(new ResourceLocation("forge", "ingots/copper"));

not

public static final Tag<Item> COPPER_INGOT = ItemTags.getCollection().getOrCreate(new ResourceLocation("forge", "ingots/copper"));

 

otherwise your copper.json is in a wrong directory

Edited July 31, 20196 yr by cheaterpaul

43 minutes ago, cheaterpaul said:

while i cant see your whole code, this works for me:

package com.example.examplemod;
*imports
@Mod("examplemod")
public class ExampleMod
{
    public static Tag<Item> coppertag = new ItemTags.Wrapper(new ResourceLocation("forge", "ingots/copper"));
    public ExampleMod() {
    }
    @Mod.EventBusSubscriber(bus=Mod.EventBusSubscriber.Bus.MOD)
    public static class RegistryEvents {
        @SubscribeEvent
        public static void onItemRegistry(final RegistryEvent.Register<Item> blockRegistryEvent) {
            blockRegistryEvent.getRegistry().register(new Item(new Item.Properties().group(ItemGroup.BREWING)).setRegistryName("examplemod:copper"));
            blockRegistryEvent.getRegistry().register(new SwordItem(new Tier(),4,1,new Item.Properties().group(ItemGroup.BREWING)).setRegistryName("examplemod:coppersword"));
        }
    }

    public static class Tier implements IItemTier{
        @Override
        public int getMaxUses() {
            return 100;
        }

        @Override
        public float getEfficiency() {
            return 4;
        }

        @Override
        public float getAttackDamage() {
            return 2;
        }

        @Override
        public int getHarvestLevel() {
            return 1;
        }

        @Override
        public int getEnchantability() {
            return 50;
        }

        @Override
        public Ingredient getRepairMaterial() {
            return Ingredient.fromTag(coppertag);
        }

        public Tier() {
        }
    }
}

 but i think the problem is that you need

public static final Tag<Item> COPPER_INGOT = new ItemTags.Wrapper(new ResourceLocation("forge", "ingots/copper"));

not

public static final Tag<Item> COPPER_INGOT = ItemTags.getCollection().getOrCreate(new ResourceLocation("forge", "ingots/copper"));

 

otherwise your copper.json is in a wrong directory

It finally works! Thank you very much.