Minecraft Command NBT Array Add

Question

I'm having (for example) a entity (Drop) with this NBT:

{Item:{tag:{display:{Lore:["test1"]}},id:"minecraft:bread"}}

I'm trying to add a new lore:

/data merge entity @e[type=item,tag=myDrop] {Item:{tag:{display:{Lore:["test2"]}}}}

But when I execute this and collect my drop there is ONLY test2 as lore but i need test1 and test2. Please help! Thanks.

EDIT: I don't know the content and/or the count of test1.

EDIT2: So simply a array.append() but how in minecraft?

Does it work if you specify Item.tag.display.Lore[1] as the path? — Fabian Röling, Oct 08 '18 at 16:19
I have a lot of data and this is a part but I haven't tried path because i don't know how much test1 is there. — nift4, Oct 08 '18 at 17:37
You mean you don't know how many lore lines there already are? — Fabian Röling, Oct 09 '18 at 06:08
I don't know if there is a way to get the number of items in an NBT array. Also, I just noticed that /data merge doesn't have a path argument. I don't think it's possible to do what you want. — Fabian Röling, Oct 09 '18 at 12:25
1.14 has some nice new NBT editing commands, I think this should now be possible. I'll write an answer when I have time (and access to Minecraft), for now you might be able to figure it out using this wiki page (scroll down to "Other"). — Fabian Röling, Jan 08 '19 at 15:07
@Fabian Röling Thanks, found another way to display my things, but added for Googlers as Answer. — nift4, Mar 02 '19 at 16:30

score 2 · Accepted Answer · edited Dec 28 '19 at 23:45

2

1.14 introduces this feature using the "append" mode of /data modify:

/data modify entity @e[type=item,limit=1] Item.tag.display.Lore append value "{\"text\":\"second line\"}"

edited Dec 28 '19 at 23:45

Fabian Röling

answered Mar 02 '19 at 16:28

nift4

score -1 · Answer 2 · answered Oct 08 '18 at 16:28

-1

Try

/data merge entity @e[type=item,limit=1] {Item:{tag:{display:{Lore:["test2","test1"]}}}}

You're still replacing the original test1, but you can just replace it with test1, or you could change it.

Hope this helps! :D

answered Oct 08 '18 at 16:28

Brickly

Hi! Thanks for the answer, but I have an lore I don't know and only want to add mine.(I'm making a custom enchantment in a datapack that works but i cant add the enchantment desc as a lore). See question edit. – nift4 Oct 08 '18 at 17:33

2 Answers2