How do we detect insert vs update in .before.upsert?

[trusktr]

?

[ghost]

How do we do anything in before.upsert? There's no doc argument to validate individual docs, like with the other hooks. For example, how do we do the upsert in the following?

    collection.before.insert((userId, doc) => {
      checkAgainstSchema(doc, schema)
    })
    collection.before.update((userId, doc, fieldNames, modifier, options) => {
      checkAgainstSchema(doc, schema)
    })
    collection.before.upsert(function(userId, selector, modifier, options) {
        // ???
    })

[ghost]

@matb33

[matb33]

Can you accomplish what you need with allow/deny? http://docs.meteor.com/#/basic/Mongo-Collection-allow

[ghost]

I could, but I think the hooks are a nicer pattern for this, in general. I found a solution: use LocalCollection from minimongo. We can get the documents (if any) using the selector, then transform them to their new state with LocalCollection._modify, and finally check the modified documents before they are actually sent to the DB.