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

buildSchema.ts

// 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': [],
		},
	},
}