[MC-65664] Squid and Ghasts with NoAI affected by knockback (& gravity for Squid)

Resolution note

This report was closed as "Works As Intended" due to the following comment by @unknown:

Any part of an entities behavior that is not implemented as part of the AI is not affected by the NoAI tag

When summoning other mobs with the "NoAI" tag set to 1, they will not fall due to gravity, nor will they be knocked back by damage taken. Squid, on the other hand, are affected by gravity and knockback.

/summon Squid ~ ~ ~ {NoAI:1}

The tag does work correctly for other features, such as swimming. Ghasts will also be affected by knockback, though the tag does prevent them from flying around normally.

/summon Ghast ~ ~ ~ {NoAI:1}

Related issues

is duplicated by

MC-69369 Squid {NoAI: 1b} don't move but are affected by gravity

MC-86101 Ghast Can Move Even With {NoAI:1b} tag

MC-137218 Squids with NoAI:1b behave weirdly

MC-152700 You can push a ghast when it has no AI

MC-173626 NoAI Ghasts can be moved

MC-219121 Squid and glow squid are affected by gravity even when NoAI is set to 1.

MC-226457 Glow squid's {NoAI:1b} doesn't work(squid too)

Comments

migrated 2014-08-23T11:57:37Z

Confirmed for 1.8pre1

qmagnet 2014-08-23T23:32:11Z

I'd really prefer Squid not to be affected by gravity.

Sonicwave 2014-09-22T03:08:28Z

Confirmed for 1.8.

migrated 2014-11-07T12:11:11Z

Confirmed for 1.8.1-Pre4

Sonicwave 2014-12-01T08:28:33Z

Confirmed for 1.8.1.

migrated 2014-12-06T04:00:27Z

I wish that gravity and physics is not the part of the mob ai and nogravity tag for all mobs.

migrated 2015-03-10T00:30:32Z

Confirmed in 1.8.3.

migrated 2015-04-23T19:58:16Z

Confirmed in 1.8.4.

migrated 2015-08-07T18:44:01Z

Confirmed for 15w32c!

Torabi 2015-12-13T17:28:43Z

As @unknown has stated on several issues,

Any part of an entities behavior that is not implemented as part of the AI is not affected by the NoAI tag.

Squid and ghasts use the AI system to pick destinations to swim/fly to, thus stopping AI updates stops them from moving. However, because they respond to gravity differently than most mobs, they don't use the AI system for it. Knockback is presumably a similar situation. These may all get "fixed" once they expand the AI system so they can more easily move mob-specific behaviors to it, but for now are considered "Works As Intended".