Referentially transparent API about kysely

[koskimas]

So you want to be able to serialize queries, not the whole Kysely instance with drivers, connections, plugins and all?

So something like this:

const serialized: string = db.selectFrom('thing').selectAll().serialize()
const query = db.deserialize(serialized)

That should be doable, but the type of db.deserialize(serialized) would obviously be wrong, since we can't deserialize the type from just a string. The deserialized query would be something like QueryBuilder<DB, any, unknown>.

I don't think we should override toString(). People would assume toString() returns the SQL and fromString parses SQL into a QueryBuilder.

You can already serialize the query like this:

const serialized = JSON.stringify(query.toOperationNode())

[steida]

Yes, only the query.

Agreed, toString is too invasive. JSON is better, yes.

toOperation node is probably good enough, maybe we don't need deserialization at all. Will check it.

Thank you for the answer.

[steida]

@koskimas Is there an interface representing a valid SQL? To detect:

db.selectFrom('thing') not valid
db.selectFrom('thing').selectAll() valid, toOperationNode can be called.

[steida]

Hmm, forget about it. It's specialized case. I don't want to distract you.