How to create entity with unit_number

[IngoKnieto]

As far as I know every entity build by the player has the unique property "unit_number". However if I place an entity by script using surface.create_entity the unit_number of that entity is nil.
How can I create an entity by script with a unit_number?

[Bilka]

How can I create an entity by script with a unit_number?

You just create the entity normally. The simple test case of /c game.print(game.player.surface.create_entity{name = "transport-belt", position = game.player.position}.unit_number) prints the unit number and not nil.

What type of entity are you creating? Does it support unit_number?

[IngoKnieto]

The type is "simple-entity".
This is how it is created (shortened):

Code: Select all

ruin = surface.create_entity{
name=REACTOR_RUIN_NAME,
position=dead_reactor_core.position,
force=dead_reactor_core.force,
}

[...]

game.players[1].print("ruin.unit_number "..ruin.unit_number)

This is the error thrown by the print line:

error.png (157.2 KiB) Viewed 1449 times

[Klonan]

Not all entities have unit_number,

Try using `simple-entity-with-owner`

[IngoKnieto]

Thanks!

simple-entity-with-owner and simple-entity-with-force seem to have a unit number.

[eradicator]

Just because it might be relevant:

Simple-entity-with-force is "will be targeted by biters/turrets",
Simple-entity-with-owner is "has a force, but is only attacked if the biters get stuck on it".