DeJunky

Thanks for the response! Looks like I'm going to need to do some more reading and tinkering. I'll follow up if I run into any more trouble.

First of all, thanks for the help and the link to some great documentation. Perhaps it's just my lack of knowledge about loot tables but I was running into trouble trying to get a mob to drop the item. I was able to code up a condition for it to drop from a block and it worked just fine, however when I play test with this loot modifier { "type":"onion:add_onion", "conditions": [ { "condition": "minecraft:entity_properties", "entity": "this", "predicate": { "type": "minecraft:zombie" } } ] } I get a crash several seconds after loading into a world. I suspect that the issue is with the way I've written the conditions as it seems to be overloading checking entities(I'm guessing). Here is a crash report. [20:37:06] [Server thread/INFO] [minecraft/MinecraftServer]: Stopping server [20:37:06] [Server thread/INFO] [minecraft/MinecraftServer]: Saving players [20:37:06] [Render thread/INFO] [STDOUT/]: [net.minecraft.util.registry.Bootstrap:printToSYSOUT:103]: ---- Minecraft Crash Report ---- // Why did you do that? Time: 6/3/20 8:37 PM Description: Exception while updating neighbours java.lang.NullPointerException: Exception while updating neighbours at net.minecraft.world.storage.loot.conditions.EntityHasProperty.test(SourceFile:35) ~[?:?] {re:classloading} at net.minecraft.world.storage.loot.conditions.EntityHasProperty.test(SourceFile:19) ~[?:?] {re:classloading} at net.minecraftforge.common.loot.LootModifier.apply(LootModifier.java:53) ~[?:?] {re:classloading} at net.minecraftforge.common.ForgeHooks.modifyLoot(ForgeHooks.java:1194) ~[?:?] {re:classloading} at net.minecraft.world.storage.loot.LootTable.generate(LootTable.java:86) ~[?:?] {re:classloading} at net.minecraft.block.Block.getDrops(Block.java:517) ~[?:?] {re:classloading,pl:accesstransformer:B} at net.minecraft.block.BlockState.getDrops(BlockState.java:265) ~[?:?] {re:classloading} at net.minecraft.block.Block.getDrops(Block.java:523) ~[?:?] {re:classloading,pl:accesstransformer:B} at net.minecraft.block.Block.spawnDrops(Block.java:533) ~[?:?] {re:classloading,pl:accesstransformer:B} at net.minecraft.block.AbstractRailBlock.neighborChanged(AbstractRailBlock.java:88) ~[?:?] {re:classloading} at net.minecraft.block.BlockState.neighborChanged(BlockState.java:229) ~[?:?] {re:classloading} at net.minecraft.world.World.neighborChanged(World.java:321) ~[?:?] {re:classloading,pl:accesstransformer:B} at net.minecraft.world.World.notifyNeighborsOfStateChange(World.java:279) ~[?:?] {re:classloading,pl:accesstransformer:B} at net.minecraft.world.World.notifyNeighbors(World.java:265) ~[?:?] {re:classloading,pl:accesstransformer:B} at net.minecraft.world.World.markAndNotifyBlock(World.java:214) ~[?:?] {re:classloading,pl:accesstransformer:B} at net.minecraft.world.World.setBlockState(World.java:190) ~[?:?] {re:classloading,pl:accesstransformer:B} at net.minecraft.world.World.removeBlock(World.java:238) ~[?:?] {re:classloading,pl:accesstransformer:B} at net.minecraft.block.FireBlock.onBlockAdded(FireBlock.java:234) ~[?:?] {re:classloading} at net.minecraft.block.BlockState.onBlockAdded(BlockState.java:241) ~[?:?] {re:classloading} at net.minecraft.world.chunk.Chunk.setBlockState(Chunk.java:282) ~[?:?] {re:classloading} at net.minecraft.world.World.setBlockState(World.java:177) ~[?:?] {re:classloading,pl:accesstransformer:B} at net.minecraft.block.FireBlock.tryCatchFire(FireBlock.java:190) ~[?:?] {re:classloading} at net.minecraft.block.FireBlock.tick(FireBlock.java:131) ~[?:?] {re:classloading} at net.minecraft.block.BlockState.tick(BlockState.java:249) ~[?:?] {re:classloading} at net.minecraft.world.server.ServerWorld.tickBlock(ServerWorld.java:582) ~[?:?] {re:classloading} at net.minecraft.world.server.ServerTickList.tick(SourceFile:87) ~[?:?] {re:classloading} at net.minecraft.world.server.ServerWorld.tick(ServerWorld.java:316) ~[?:?] {re:classloading} at net.minecraft.server.MinecraftServer.updateTimeLightAndEntities(MinecraftServer.java:849) ~[?:?] {re:classloading,pl:accesstransformer:B} at net.minecraft.server.MinecraftServer.tick(MinecraftServer.java:784) ~[?:?] {re:classloading,pl:accesstransformer:B} at net.minecraft.server.integrated.IntegratedServer.tick(IntegratedServer.java:114) ~[?:?] {re:classloading,pl:runtimedistcleaner:A} at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:637) ~[?:?] {re:classloading,pl:accesstransformer:B} at java.lang.Thread.run(Thread.java:748) ~[?:1.8.0_191] {} A detailed walkthrough of the error, its code path and all known details is as follows: --------------------------------------------------------------------------------------- -- Head -- Thread: Render thread Stacktrace: at net.minecraft.world.storage.loot.conditions.EntityHasProperty.test(SourceFile:35) at net.minecraft.world.storage.loot.conditions.EntityHasProperty.test(SourceFile:19) at net.minecraftforge.common.loot.LootModifier.apply(LootModifier.java:53) at net.minecraftforge.common.ForgeHooks.modifyLoot(ForgeHooks.java:1194) at net.minecraft.world.storage.loot.LootTable.generate(LootTable.java:86) at net.minecraft.block.Block.getDrops(Block.java:517) at net.minecraft.block.BlockState.getDrops(BlockState.java:265) at net.minecraft.block.Block.getDrops(Block.java:523) at net.minecraft.block.Block.spawnDrops(Block.java:533) at net.minecraft.block.AbstractRailBlock.neighborChanged(AbstractRailBlock.java:88) at net.minecraft.block.BlockState.neighborChanged(BlockState.java:229) -- Block being updated -- Details: Source block type: ID #minecraft:fire (block.minecraft.fire // net.minecraft.block.FireBlock) Block: Block{minecraft:rail}[shape=east_west] Block location: World: (-122,16,-241), Chunk: (at 6,1,15 in -8,-16; contains blocks -128,0,-256 to -113,255,-241), Region: (-1,-1; contains chunks -32,-32 to -1,-1, blocks -512,0,-512 to -1,255,-1) Stacktrace: at net.minecraft.world.World.neighborChanged(World.java:321) at net.minecraft.world.World.notifyNeighborsOfStateChange(World.java:279) at net.minecraft.world.World.notifyNeighbors(World.java:265) at net.minecraft.world.World.markAndNotifyBlock(World.java:214) at net.minecraft.world.World.setBlockState(World.java:190) at net.minecraft.world.World.removeBlock(World.java:238) at net.minecraft.block.FireBlock.onBlockAdded(FireBlock.java:234) at net.minecraft.block.BlockState.onBlockAdded(BlockState.java:241) at net.minecraft.world.chunk.Chunk.setBlockState(Chunk.java:282) at net.minecraft.world.World.setBlockState(World.java:177) at net.minecraft.block.FireBlock.tryCatchFire(FireBlock.java:190) at net.minecraft.block.FireBlock.tick(FireBlock.java:131) at net.minecraft.block.BlockState.tick(BlockState.java:249) at net.minecraft.world.server.ServerWorld.tickBlock(ServerWorld.java:582) -- Block being ticked -- Details: Block location: World: (-123,15,-241), Chunk: (at 5,0,15 in -8,-16; contains blocks -128,0,-256 to -113,255,-241), Region: (-1,-1; contains chunks -32,-32 to -1,-1, blocks -512,0,-512 to -1,255,-1) Stacktrace: at net.minecraft.world.server.ServerTickList.tick(SourceFile:87) at net.minecraft.world.server.ServerWorld.tick(ServerWorld.java:316) -- Affected level -- Details: All players: 1 total; [ServerPlayerEntity['Dev'/236, l='New World', x=-102.31, y=79.00, z=-212.43]] Chunk stats: ServerChunkCache: 2255 Level dimension: DimensionType{minecraft:overworld} Level name: New World Level seed: -743399848020670749 Level generator: ID 00 - default, ver 1. Features enabled: true Level generator options: {} Level spawn location: World: (-96,72,-224), Chunk: (at 0,4,0 in -6,-14; contains blocks -96,0,-224 to -81,255,-209), Region: (-1,-1; contains chunks -32,-32 to -1,-1, blocks -512,0,-512 to -1,255,-1) Level time: 1446 game time, 1446 day time Known server brands: forge Level was modded: true Level storage version: 0x04ABD - Anvil Level weather: Rain time: 142250 (now: false), thunder time: 160957 (now: false) Level game mode: Game mode: creative (ID 1). Hardcore: false. Cheats: true Stacktrace: at net.minecraft.server.MinecraftServer.updateTimeLightAndEntities(MinecraftServer.java:849) at net.minecraft.server.MinecraftServer.tick(MinecraftServer.java:784) at net.minecraft.server.integrated.IntegratedServer.tick(IntegratedServer.java:114) at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:637) at java.lang.Thread.run(Thread.java:748) -- System Details -- Details: Minecraft Version: 1.15.2 Minecraft Version ID: 1.15.2 Operating System: Windows 10 (amd64) version 10.0 Java Version: 1.8.0_191, Oracle Corporation Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation Memory: 1074515400 bytes (1024 MB) / 2050490368 bytes (1955 MB) up to 3801088000 bytes (3625 MB) CPUs: 12 JVM Flags: 1 total; -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump ModLauncher: 5.1.0+69+master.79f13f7 ModLauncher launch target: fmluserdevclient ModLauncher naming: mcp ModLauncher services: /eventbus-2.2.0-service.jar eventbus PLUGINSERVICE /forge-1.15.2-31.2.0_mapped_snapshot_20200514-1.15.1-launcher.jar object_holder_definalize PLUGINSERVICE /forge-1.15.2-31.2.0_mapped_snapshot_20200514-1.15.1-launcher.jar runtime_enum_extender PLUGINSERVICE /accesstransformers-2.1.1-shadowed.jar accesstransformer PLUGINSERVICE /forge-1.15.2-31.2.0_mapped_snapshot_20200514-1.15.1-launcher.jar capability_inject_definalize PLUGINSERVICE /forge-1.15.2-31.2.0_mapped_snapshot_20200514-1.15.1-launcher.jar runtimedistcleaner PLUGINSERVICE /forge-1.15.2-31.2.0_mapped_snapshot_20200514-1.15.1-launcher.jar fml TRANSFORMATIONSERVICE FML: 31.2 Forge: net.minecraftforge:31.2.0 FML Language Providers: [email protected] minecraft@1 Mod List: client-extra.jar Minecraft {[email protected] DONE} main Onion Mod {[email protected]_1.0.0 DONE} forge-1.15.2-31.2.0_mapped_snapshot_20200514-1.15.1.jar Forge {[email protected] DONE} Player Count: 1 / 8; [ServerPlayerEntity['Dev'/236, l='New World', x=-102.31, y=79.00, z=-212.43]] Data Packs: vanilla, mod:onion, mod:forge (incompatible) Type: Integrated Server (map_client.txt) Is Modded: Definitely; Client brand changed to 'forge' [20:37:06] [Render thread/INFO] [STDOUT/]: [net.minecraft.util.registry.Bootstrap:printToSYSOUT:103]: #@!@# Game crashed! Crash report saved to: #@!@# .\crash-reports\crash-2020-06-03_20.37.06-server.txt [20:37:06] [Server thread/INFO] [minecraft/ServerPlayNetHandler]: Dev lost connection: Disconnected [20:37:06] [Server thread/INFO] [minecraft/MinecraftServer]: Dev left the game AL lib: (EE) alc_cleanup: 1 device not closed

I just started out learning forge modding so I'm creating a simple mod that adds an extra crop to the game. I would like to add a chance for zombies to drop the seed item for this crop and I'm not sure how to go about this. Basically, how can I add my item to the loot table for zombies, or how could I inject my item into the loot table?