DREPECATED: Static Schema for Parse Server (TS/JS) (tested, and production ready)

buildSchema.ts

// DEPRECATED: If Defined Schema PR not already merged on parse-server repo, feel free to use my forked build
// add "parse-server": "moumouls/parse-server#beta.26" in your package.json
// Linked comment: https://gist.github.com/Moumouls/e4f0c6470398efc7a6a74567982185fa#gistcomment-3742504

// This function update, migrate and create Classes
export const buildSchemas = async (localSchemas: any[]) => {
	try {
		const timeout = setTimeout(() => {
			if (process.env.NODE_ENV === 'production') process.exit(1)
		}, 20000)
		const allCloudSchema = (await Parse.Schema.all()).filter(
			(s: any) => !lib.isDefaultSchema(s.className),
		)
		clearTimeout(timeout)
		// Hack to force session schema to be created
		await lib.createDeleteSession()
		await Promise.all(
			localSchemas.map(async (localSchema) => lib.saveOrUpdate(allCloudSchema, localSchema)),
		)
	} catch (e) {
		if (process.env.NODE_ENV === 'production') process.exit(1)
	}
}

export const lib = {
	createDeleteSession: async () => {
		const session = new Parse.Session()
		await session.save(null, { useMasterKey: true })
		await session.destroy({ useMasterKey: true })
	},
	saveOrUpdate: async (allCloudSchema: any[], localSchema: any) => {
		const cloudSchema = allCloudSchema.find((sc) => sc.className === localSchema.className)
		if (cloudSchema) {
			await lib.updateSchema(localSchema, cloudSchema)
		} else {
			await lib.saveSchema(localSchema)
		}
	},
	saveSchema: async (localSchema: any) => {
		const newLocalSchema = new Parse.Schema(localSchema.className)
		// Handle fields
		Object.keys(localSchema.fields)
			.filter((fieldName) => !lib.isDefaultFields(localSchema.className, fieldName))
			.forEach((fieldName) => {
				const { type, ...others } = localSchema.fields[fieldName]
				lib.handleFields(newLocalSchema, fieldName, type, others)
			})
		// Handle indexes
		if (localSchema.indexes) {
			Object.keys(localSchema.indexes).forEach((indexName) =>
				newLocalSchema.addIndex(indexName, localSchema.indexes[indexName]),
			)
		}

		// @ts-ignore
		newLocalSchema.setCLP(localSchema.classLevelPermissions)
		return newLocalSchema.save()
	},
	updateSchema: async (localSchema: any, cloudSchema: any) => {
		const newLocalSchema: any = new Parse.Schema(localSchema.className)

		// Handle fields
		// Check addition
		Object.keys(localSchema.fields)
			.filter((fieldName) => !lib.isDefaultFields(localSchema.className, fieldName))
			.forEach((fieldName) => {
				const { type, ...others } = localSchema.fields[fieldName]
				if (!cloudSchema.fields[fieldName])
					lib.handleFields(newLocalSchema, fieldName, type, others)
			})

		// Check deletion
		await Promise.all(
			Object.keys(cloudSchema.fields)
				.filter((fieldName) => !lib.isDefaultFields(localSchema.className, fieldName))
				.map(async (fieldName) => {
					const field = cloudSchema.fields[fieldName]
					if (!localSchema.fields[fieldName]) {
						newLocalSchema.deleteField(fieldName)
						await newLocalSchema.update()
						return
					}
					const localField = localSchema.fields[fieldName]
					if (!lib.paramsAreEquals(field, localField)) {
						newLocalSchema.deleteField(fieldName)
						await newLocalSchema.update()
						// @ts-ignore
						const { type, ...others } = localField
						lib.handleFields(newLocalSchema, fieldName, type, others)
					}
				}),
		)

		// Handle Indexes
		// Check addition
		const cloudIndexes = lib.fixCloudIndexes(cloudSchema.indexes)

		if (localSchema.indexes) {
			Object.keys(localSchema.indexes).forEach((indexName) => {
				if (
					!cloudIndexes[indexName] &&
					!lib.isNativeIndex(localSchema.className, indexName)
				)
					newLocalSchema.addIndex(indexName, localSchema.indexes[indexName])
			})
		}

		const indexesToAdd: any[] = []

		// Check deletion
		Object.keys(cloudIndexes).forEach(async (indexName) => {
			if (!lib.isNativeIndex(localSchema.className, indexName)) {
				if (!localSchema.indexes[indexName]) {
					newLocalSchema.deleteIndex(indexName)
				} else if (
					!lib.paramsAreEquals(localSchema.indexes[indexName], cloudIndexes[indexName])
				) {
					newLocalSchema.deleteIndex(indexName)
					indexesToAdd.push({
						indexName,
						index: localSchema.indexes[indexName],
					})
				}
			}
		})
		// @ts-ignore
		newLocalSchema.setCLP(localSchema.classLevelPermissions)
		await newLocalSchema.update()
		indexesToAdd.forEach((o) => newLocalSchema.addIndex(o.indexName, o.index))
		return newLocalSchema.update()
	},

	isDefaultSchema: (className: string) =>
		['_Session', '_PushStatus', '_Installation'].indexOf(className) !== -1,

	isDefaultFields: (className: string, fieldName: string) => {
		if (className === '_Role') return true
		return (
			[
				'objectId',
				'createdAt',
				'updatedAt',
				'ACL',
				'emailVerified',
				'authData',
				'username',
				'password',
				'email',
			]
				.filter(
					(value) =>
						(className !== '_User' && value !== 'email') || className === '_User',
				)
				.indexOf(fieldName) !== -1
		)
	},

	fixCloudIndexes: (cloudSchemaIndexes: any) => {
		if (!cloudSchemaIndexes) return {}
		const { _id_, ...others } = cloudSchemaIndexes

		return {
			objectId: { objectId: 1 },
			...others,
		}
	},

	isNativeIndex: (className: string, indexName: string) => {
		if (className === '_User') {
			switch (indexName) {
				case 'case_insensitive_username':
					return true
				case 'case_insensitive_email':
					return true
				case 'username_1':
					return true
				case 'objectId':
					return true
				case 'email_1':
					return true
				default:
					break
			}
		}
		if (className === '_Role') {
			return true
		}
		return false
	},

	paramsAreEquals: (indexA: any, indexB: any) => {
		const keysIndexA = Object.keys(indexA)
		const keysIndexB = Object.keys(indexB)

		// Check key name
		if (keysIndexA.length !== keysIndexB.length) return false
		return keysIndexA.every((k) => indexA[k] === indexB[k])
	},

	handleFields: (newLocalSchema: Parse.Schema, fieldName: string, type: string, others: any) => {
		if (type === 'Relation') {
			newLocalSchema.addRelation(fieldName, others.targetClass)
		} else if (type === 'Pointer') {
			const { targetClass, ...others2 } = others
			// @ts-ignore
			newLocalSchema.addPointer(fieldName, targetClass, others2)
		} else {
			// @ts-ignore
			newLocalSchema.addField(fieldName, type, others)
		}
	},
}

server.ts

import { User } from './user-example'
import { buildSchemas } from './buildSchema

const parseServer = ParseServer.start({
			databaseURI: 'mongodb://localhost:27017/parse',
			cloud: 'some/cloud-code',
			appId: 'test',
			masterKey: 'test',
			serverURL: 'http://localhost:1337/parse',
			publicServerURL: 'http://localhost:1337/parse',
			allowClientClassCreation: false,
			port: 1337,
      // Magic happen here, after the start
      // buildSchemas will try to manage classes
			serverStartComplete: async () => {
				await buildSchemas([User])
			},
		})

user-example.ts

// Follow the JSON structure from REST API https://docs.parseplatform.org/rest/guide/#schema
export const User = {
	className: '_User',
	fields: {
		objectId: { type: 'String' },
		createdAt: {
			type: 'Date',
		},
		updatedAt: {
			type: 'Date',
		},
		ACL: { type: 'ACL' },
		email: { type: 'String' },
		authData: { type: 'Object' },
		password: { type: 'String' },
		username: { type: 'String' },
		firstname: { type: 'String' },
		lastname: { type: 'String' },
		picture: { type: 'File' },
		civility: { type: 'String' },
		type: { type: 'String' },
		birthDate: { type: 'Date' },
		address: { type: 'Object' },
		meta: { type: 'Array' },
		phone: { type: 'String' },
	},
	indexes: {
		objectId: { objectId: 1 },
		type: { type: 1 },
		lastname: { lastname: 1 },
	},
	classLevelPermissions: {
		find: { requiresAuthentication: true },
		count: { requiresAuthentication: true },
		get: { requiresAuthentication: true },
		update: { 'role:Admin': true },
		create: { '*': true },
		delete: { 'role:Admin': true },
		addField: {},
		protectedFields: {
			'role:Admin': [],
		},
	},
}

You can see some documentation here: parse-community/parse-server#7091 (comment)
Schema migration is automatically performed at parse server startup, if you want to perform some job before schema migration you can use the beforeSchemasMigration async function.

my fork is up to date from major changes (like the schema cache rework). For the auth rework may be the best way at the time is to just check the Auth test on my auth PR.

Webauthn is an amazing technology, i use it on prod to allow some users to login with FaceId, Fingerprint, security keys, Touch id etc...
Webauthn as it's name suggest is available on web systems (Safari IOS, Chrome Android, Firefox Android, Desktop browsers).
Currently webauthn is not so easy to use, Parse need an appropriate JS SDK method for an easier implementation.

The webauthn implementation is designed to work with: https://simplewebauthn.dev/docs/packages/browser

Unless you are willing to spend a lot of time on it, I suggest not to use the webauthn until the ready-made solution is fully integrated with parse.