Swift docs should make it clear that filtering by someListOfPrimitives.@count isn't supported

[sadlerjw]

Goals

Filter a List of primitives by @count using RealmSwift, since the docs suggest this is possible:

The aggregate expressions @count, @min, @max, @sum and @avg are supported on List and Results properties, e.g. realm.objects(Company.self).filter("employees.@count > 5") to find all companies with more than five employees.

https://realm.io/docs/swift/latest/#queries

Expected Results

The docs should make it clear that filtering on @count on a List property is only supported for relationships, not primitives

Actual Results

Crash, as per several other issues: #5832, #5491, etc.
It turns out this isn't yet supported, as documented in #5334

Steps to Reproduce

Please see linked issues

Code Sample

Please see linked issues

Version of Realm and Tooling

ProductName:	Mac OS X
ProductVersion:	10.14.2
BuildVersion:	18C54

/Applications/Xcode.app/Contents/Developer
Xcode 10.1
Build version 10B61

/usr/local/bin/pod
1.5.3
Realm (3.7.5)
RealmSwift (3.7.5)

/bin/bash
GNU bash, version 3.2.57(1)-release (x86_64-apple-darwin18)

carthage not found
(not in use here)

/usr/local/bin/git
git version 2.20.1

[RealmBot]

➤ Lee Maguire commented:

[~chris.bush] is this something you could take a look at?

[leemaguire]

I have flagged this with our docs team.