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I'm attempting to make a Spawner which will generate Minecarts. The command I'm using is:

/setblock ~ ~ ~ mob_spawner 0 replace {EntityId:"MinecartRideable"}

That certainly creates a Spawner with a Minecart inside, but it never spawns one. On the other hand, if I make a Cow Spawner:

/setblock ~ ~ ~ mob_spawner 0 replace {EntityId:"Cow"}

it starts spawning Cows just fine. Why are Minecarts different?

I'm running Minecraft 1.7.9, single-player creative, with cheats.

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  • Mod spawners are designed to do... Just that. If I remember right, creating a mob spawner to spawn a non-mob entity would crash the game.
    – peper757
    Commented May 6, 2014 at 21:49
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    @peper757 not the case. Vechs uses a minecart spawner in inferno mines (custom map)
    – shanodin
    Commented May 6, 2014 at 21:52
  • @shanodin I'm assuming no mods are required to play the map.
    – peper757
    Commented May 6, 2014 at 21:54
  • @peper757 none. It is vanilla.
    – shanodin
    Commented May 6, 2014 at 21:55
  • @shanodin Then, I've got nothing.
    – peper757
    Commented May 6, 2014 at 21:55

3 Answers 3

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The reason you cannot spawn Minecarts like this is because of the way Minecart spawning work. As you know, a spawner only spawns items IF its spawning condition is correct.

For a Minecart (or boat etc.), the spawning requirement is that it is placed by a player activating it on a rail (of any sort). Because a spawner IS NOT a player, it cannot spawn it. Thus, the Minecart SaveGameID "MinecartRidable" is not usable because it is a placeholder of the original Minecart SaveGameID (which switches to MinecartRidable the moment it's placed/spawned), is "Minecart".

I've also tried it with tracks all around the Minecart spawner, which does not work because again, Minecarts must be placed (activated; right clicked on rails). Boats work because they behave like a spawn egg. Only, that it will only spawn in water.

EDIT: The reason it worked is because Boats and Minecarts do not have a spawning requirement in older versions... (I'm not sure which, but I think it's around 1.2 Release) Now, only items such as throwable potions and experience orbs do not have a spawn requirement.

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  • Aha! Does this mean there's no way to get a Minecart Spawner to work in current versions of Minecraft, or is there a workaround?
    – Peeja
    Commented May 7, 2014 at 15:09
  • Seeing that you are already using commands, you could always spawn in your Minecarts directly using command blocks on a clock. Alternatively, since Skeletons in Minecarts are possible: Try using that, coupled with a skeleton killing command block, i.e. /kill @e[(skeletons in the right place)]. That might leave just the minecarts.
    – MrLemon
    Commented May 8, 2014 at 7:59
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    @Peeja - Yes, there is no way to get spawners to work. However, as MrLemon said: You can use command blocks (on a clock) to spawn mobs riding minecarts as the minecart that the mob is riding actually despawns (as its own seperate entity) and joins up with the mob riding it. (It can be found in the riding mob's NBT as a compound tag called "Riding", followed by the minecart properties inside it.) EDIT: Try /setblock ~ ~ ~ minecraft:mob_Spawner {EntityId:Pig,{Riding:{id:MinecartRidable}}} - I haven't tested it. Oh, and don't forget to kill the pigs.
    – aytimothy
    Commented May 8, 2014 at 11:12
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I'm taking a shot in the dark with this, but you know how slimes have to spawn in a swamp/slime chunk and mobs have to spawn in dark places? That is, from mob spawners.

I'm thinking that minecarts have to spawn on rails, correct me if I'm wrong.

EDIT: OP told me this doesn't work... :(

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  • Ah, an excellent thought, but I do have rails down next to it. :)
    – Peeja
    Commented May 7, 2014 at 2:28
  • @Peeja, erm... I have no idea beyond that.
    – Atutouato
    Commented May 7, 2014 at 22:22
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I would suggest that you use MCEdit and SethBlings filters. check youtube or sethblings website. also you will need rail fir it to spawn.

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