In MongoDB, what does it mean to have the required = true condition for a field in a collection?
required = true
Can the value be null?
null
2
No value cannot be null, required: true will throw an error if null value is passed to the field on which required is implemented.
required: true
required
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)
val != null
Keep in mind, that’s the default behavior, so there is a possibility for custom implementation.
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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Answers
No value cannot be
null,required: truewill throw an error ifnullvalue is passed to the field on whichrequiredis implemented.As per Mongoose documentation on required
Keep in mind, that’s the default behavior, so there is a possibility for custom implementation.
required = trueseems to be using Mongoose, so it doesn’t accepts null values.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
requiredoptioni.e.:
More can be found here