Question 118539 in Mongodb Question posted in
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Mongodb – Is the value of `null` allowed for fields that are required?

In MongoDB, what does it mean to have the required = true condition for a field in a collection?

Can the value be null?

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  1. 0

    No value cannot be null, required: true will throw an error if null value is passed to the field on which required is implemented.

    As per Mongoose documentation on required

    By default, a value satisfies the required validator if val != null (that is, if the value is not null nor undefined)

    Keep in mind, that’s the default behavior, so there is a possibility for custom implementation.

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  2. 0

    required = true seems to be using Mongoose, so it doesn’t accepts null values.

    By default, a value satisfies the required validator if val != null (that is, if the value is not null nor undefined).

    Can be found in their docs: https://mongoosejs.com/docs/api.html#schematype_SchemaType-required

    MongoDB has a similar approach, but you declare all fields in the required option

    i.e.:

    ...
required: [ "name", "year", "major", "address" ]
...

    More can be found here

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