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SOLVED - Modify NBT Tags


Diamown

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Hey, I want to modify an existing item tag, I want to add to a creative tab a light block with a level of 8, I tried many times but failed, can you help me fix it (i'm using forge 1.19) ?

Edited by Diamown
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If I understand your question correctly, override fillItemCategory() for your Item to add ItemStack(s) that do what you want.

 

Boilerplate:

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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11 minutes ago, warjort said:

If I understand your question correctly, override fillItemCategory() for your Item to add ItemStack(s) that do what you want.

 

Although since you are probably using a BlockItem? You should override the fillItemCategory() on your Block.

Boilerplate:

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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Then just override fillItemList() for your CreativeModeTab.

Edited by warjort

Boilerplate:

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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I finaly found a working way :

Quote

 

ItemStack lightItem = Items.LIGHT.getDefaultInstance();

CompoundTag compoundtag = new CompoundTag();

CompoundTag compoundtag1 = new CompoundTag();

compoundtag1.putInt("level", light);

compoundtag.put("BlockStateTag", compoundtag1);

lightItem.setTag(compoundtag);

 

 

Edited by Diamown
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  • Diamown changed the title to SOLVED - Modify NBT Tags

There's some pretty bad habits in that code. 🙂

And I don't think it works properly?

 

* You shouldn't just setTag() - this will wipe out other important info already in the item stack created by getDefaultInstance(). You should modify only the part you are interested in.

* You should use symbolic constants to make the code more readable. It also helps to trap when future changes by Mojang will affect your code.

* The block state values are stored as Strings - in general you should use the property to generate the serialized value - getName(T)

 

            var lightStack = Items.LIGHT.getDefaultInstance();
            var blockStateTag = lightStack.getOrCreateTagElement(BlockItem.BLOCK_STATE_TAG);
            blockStateTag.putString(BlockStateProperties.LEVEL.getName(), BlockStateProperties.LEVEL.getName(8)); // putString("level", "8")

 

Boilerplate:

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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