CODEWITHSUNDEEP
javascriptnode.jsmongodbmongoose
m-ketan
m-ketan

Reputation: 1308

Cast to string failed for array

So, I'm trying to create a document from the elements of an array but it constantly throws Document Validation Error.

The schema is like this:

userId: String,
terms: [{
  value: String,
  system: String
}],
group: String

I have an array of values for terms, ['hello', 'hey', 'hi']

Now, I want to be able to create a document using the values from the array like this:

{
  userId: 'foo',
  terms: [{value: 'hello'}, {value: 'hey'}, {value: 'hi'}],
  group: 'bar'
}

The way I'm trying to do it but failing:

let arr = ['hello', 'hey', 'hi'];
Document.create({userId: 'somevalue', terms: {value: {$in: arr}}}) // validation error

Upvotes: 1

Views: 53

Answers (1)

Neil Lunn
Neil Lunn

Reputation: 151112

Use .map()

let arr = ['hello', 'hey', 'hi'];
Document.create({
  userId: 'somevalue',
  terms: arr.map(value => ({ value }) )
})

That will actually transform the array content as:

[{value: 'hello'}, {value: 'hey'}, {value: 'hi'}]

and use that value as you create the document.

Upvotes: 2

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