Buffer SchemaType constructor

Override the function the required validator uses to check whether a string passes the required check.

Example:

// Allow empty strings to pass `required` check
mongoose.Schema.Types.String.checkRequired(v => v != null);

const M = mongoose.model({ buf: { type: Buffer, required: true } });
new M({ buf: Buffer.from('') }).validateSync(); // validation passes!

Attaches a getter for all Buffer instances

Example:

// Always convert to string when getting an ObjectId
mongoose.Schema.Types.Buffer.get(v => v.toString('hex'));

const Model = mongoose.model('Test', new Schema({ buf: Buffer } }));
typeof (new Model({ buf: Buffer.fromString('hello') }).buf); // 'string'

Check if the given value satisfies a required validator. To satisfy a required validator, a buffer must not be null or undefined and have non-zero length.

Sets the default subtype for this buffer. You can find a list of allowed subtypes here.

Example:

const s = new Schema({ uuid: { type: Buffer, subtype: 4 });
const M = db.model('M', s);
const m = new M({ uuid: 'test string' });
m.uuid._subtype; // 4

This schema type's name, to defend against minifiers that mangle function names.

Sets a default option for all Buffer instances.

Example:

// Make all buffers have `required` of true by default.
mongoose.Schema.Buffer.set('required', true);

const User = mongoose.model('User', new Schema({ test: Buffer }));
new User({ }).validateSync().errors.test.message; // Path `test` is required.