How to access specific value from mongoose query callback?
When you are using an undefined schema, the json output from find can't be handled like a real javascript object. Use toObject() to convert it and you will be able to use it as you would any other object, you can see the difference here:
var Model = mongoose.model('Model', new mongoose.Schema({}))
Model.find({user_id: '1234'}, function(err, obj) {
console.log(obj[0].user_id) // undefined
console.log(obj[0].toObject().user_id) // 1234
})
or:
var Model = mongoose.model('Model', new mongoose.Schema({
user_id: String,
}))
Model.find({user_id: '1234'}, function(err, obj) {
console.log(obj[0].user_id) // 1234
console.log(obj[0].toObject().user_id) // 1234
})
Roland
Updated on June 13, 2022Comments
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Roland almost 2 years
First a little introduction to the situation. I have a MongoDB collection filled with documents. I use a schema.statics to query a particular row
TweetSchema.statics.maxAndLimit = function(screen_name, cb) { this.find({ 'user.screen_name': screen_name }).sort({'id_str':1}).select({'id_str':1,'user.statuses_count':1,'user.screen_name':1,'_id':0}).limit(1).exec(cb); };
When the query is finished it calls the callback (cb).
In the callback I want to bind the values to variables so I can use them later. This is what I can't seem to solve:
console.log(result) == [{id_str:'12346875',user:{statuses_count:500,screen_name:'username'}}] console.log(result.id_str) == 'undefined'
Same goes for:
console.log(result[0].id_str)
Why can I not get a specific value? The typeof(result) says 'object'.
Update per request My non-strict schema caused Mongoose to return a non-real javascript object. So for future reference here's the 'schema' I used:
var TweetSchema = new Schema({}, {strict: false});
I didn't want to define everything as it's a Twitter Timeline object and thus not always the same.
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Raeesaa almost 10 yearsAny idea how to update document of such type? I am using non-strict mongoose schema and I am trying to update an array in record as
author.toObject().books.push(someObject)
and thenauthor.save()
but document is not getting updated. -
Mattias Farnemyhr almost 10 yearstoObject is just a json dict. its not a model so you can't change it.
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Raeesaa almost 10 yearshmmm. How can one modify documents of non-strict mongoose schemas then?
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Mohamed Sohail over 7 yearsFantastic! Solved my problem!