`has_many_inversing` adds records to a has_many association. It does so
with destroyed records, too. So if a child was destroyed with a `touch:
true` association on the parent *and* the parent was not loaded, it
tried to load the parent to touch it. While loading the parent it added
the child record to the parent's has_many association. The logic doing
this always set the child's parent id – even if it was correct/the same
already. But since the child is destroyed, it resulted in a
`FrozenError`.
This commit prevents doing the unnecessary setting of the identical id
and therefore fixes this error.
Fixes#40943 by not doing an unneeded attribute set.
Closes#40969.
[Markus Doits + Rafael Mendonça França]
Since 213796f, bind params are used for IN clause if enabled prepared
statements.
Unfortunately, most adapter modules have a limitation for # of bind
params (mysql2 65535, pg 65535, sqlite3 250000). So if eager loading
large number of records at once, that query couldn't be sent to the
database.
Since eager loading/preloading queries are auto-generated by Active
Record itself, so it should be worked regardless of large number of
records like as before.
Fixes#33702.
Rafael Mendonça França