Factorio Forums

What?
The documentation doesn't seem to have a page about the order in which events are called in correlation to each other. Specifically things like:
"Is on_chunk_generated called after on_nth_tick"? (discussed here)
"Is on_tick called before on_nth_tick?" etc.
This: https://lua-api.factorio.com/latest/def ... nes.events list seems oddly un-alphabetical, so i'm not sure if that is the order. A dedicated page would be nice to have :).

on_tick is run before on_nth_tick and on_chunk_generated is run after on_tick.

The order of other events isn't defined. For example: robot built entity can happen any time during a tick any number of times along with robot-mined-entity any time during a tick any number of times.

What about event handling results between mods?

Say mod 1 handles on_built_entity(mod1_entity) by deleting mod1_entity and replacing it with a different entity.
Will mods loaded after mod 1 also get on_built_entity(mod1_entity) with mod1_entity.valid = false?

Optera wrote:What about event handling results between mods?

Say mod 1 handles on_built_entity(mod1_entity) by deleting mod1_entity and replacing it with a different entity.
Will mods loaded after mod 1 also get on_built_entity(mod1_entity) with mod1_entity.valid = false?

No, in that case the event calls simply stop because an invalid entity is invalid and can't even be compared to another entity in any meaningful way (like trying to check if a collection of nils is a specific nil).

Rseding91 wrote:on_tick is run before on_nth_tick and on_chunk_generated is run after on_tick.

The order of other events isn't defined. For example: robot built entity can happen any time during a tick any number of times along with robot-mined-entity any time during a tick any number of times.

Arg, yes. Most events can occur multiple times ofc.

Are on_tick and on_nth_tick at least always guaranteed to be the first two events in each tick? (Could they be script.raise_event'ed to break that assumption?)