Question

I have some code that looks very similar to this in a create function:

if(req.body.test !== undefined)
{
        if(--req.body.test EXISTS IN test (model)--)
        {
            DO STUFF
        }
        else
        {
            DO OTHER STUFF
        }

}

I've been brainstorming for a while now, and I can't seem to figure out what code I would need to use to figure out the --req.body.test EXISTS IN test (model)-- part....I know it can't be as hard as I'm thinking it is.

Any help appreciated....

Thanks

Answer 1

它可以像count()一样简单吗？

if(db.collection.count({test: "test"}) > 2)

Answer 2

Have you tried a unique index at the MongoDB level and then catch a mongoose uniqueness error?

db.models.createIndex({ test: 1 }, { unique: true })

Then insert and check for error code 11001. You can also findOne and see if a document comes back.

Checking for duplicates with Mongoose?

2 个答案: