Return query collection from useLiveQuery

[KyleAMathews]

Fixes #67

@samwillis I started working on this and ran into this issue when trying to add a test where I query the QueryCollection.

 FAIL   @tanstack/react-optimistic  tests/useLiveQuery.test.tsx > Query Collections > should be able to query a colle
ction
TypeError: object is not iterable (cannot read property Symbol(Symbol.iterator))
 ❯ ../optimistic/src/query/compiled-query.ts:84:30
     82|             data.collection
     83|               .getInner()
     84|               .reduce((acc, [[key, value], multiplicity]) => {
       |                              ^
     85|                 console.log({ acc, key, value, multiplicity })
     86|                 const changes = acc.get(key) || {
 ❯ OutputOperator.<anonymous> ../optimistic/src/query/compiled-query.ts:84:16
 ❯ OutputOperator.run ../../node_modules/.pnpm/@electric-sql+d2ts@0.1.4_@electric-sql+client@1.0.0/node_modules/@elec
tric-sql/d2ts/src/operators/output.ts:35:15
 ❯ D2.step ../../node_modules/.pnpm/@electric-sql+d2ts@0.1.4_@electric-sql+client@1.0.0/node_modules/@electric-sql/d2
ts/src/d2.ts:78:10
 ❯ D2.run ../../node_modules/.pnpm/@electric-sql+d2ts@0.1.4_@electric-sql+client@1.0.0/node_modules/@electric-sql/d2t
s/src/d2.ts:88:12
 ❯ CompiledQuery.runGraph ../optimistic/src/query/compiled-query.ts:177:16
 ❯ ../optimistic/src/query/compiled-query.ts:193:12
 ❯ batch ../../node_modules/.pnpm/@tanstack+store@0.7.0/node_modules/@tanstack/store/src/scheduler.ts:143:8
 ❯ CompiledQuery.start ../optimistic/src/query/compiled-query.ts:187:5

I quickly got lost in the mirror world of multisets so thought you should look at it 😂

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[pkg-pr-new]

examples/react/todo

npm i https://pkg.pr.new/@tanstack/db@74

npm i https://pkg.pr.new/@tanstack/db-collections@74

npm i https://pkg.pr.new/@tanstack/react-db@74

commit: bf2b272

[samwillis]

I'll pick this up tomorrow.

[samwillis]

@KyleAMathews fixed, you were very close on this - it was the missing keyBy (need to get rid of that!)

added it all as a new test at the end, with a bonus test go groupBy for a count by team.

[samwillis]

👍

[KyleAMathews]

haha oops, thanks! And nice test 💥