rename with execution order, add desc & initial creation script

tools/migration/issue_882.js

@@ -1,47 +0,0 @@
-// for Node.js interpret
-
-const { default: DriveFile } = require('../../built/api/models/drive-file')
-const { default: zip } = require('@prezzemolo/zip')
-
-const migrate = async (doc) => {
-	const result = await DriveFile.update(doc._id, {
-		$set: {
-			contentType: doc.metadata.type
-		},
-		$unset: {
-			'metadata.type': ''
-		}
-	})
-	return result.ok === 1
-}
-
-async function main() {
-	const query = {
-		'metadata.type': {
-			$exists: true
-		}
-	}
-
-	const count = await DriveFile.count(query);
-
-	const dop = Number.parseInt(process.argv[2]) || 5
-	const idop = ((count - (count % dop)) / dop) + 1
-
-	return zip(
-		1,
-		async (time) => {
-			console.log(`${time} / ${idop}`)
-			const doc = await db.get('drive_files').find(query, {
-				limit: dop, skip: time * dop
-			})
-			return Promise.all(doc.map(migrate))
-		},
-		idop
-	).then(a => {
-		const rv = []
-		a.forEach(e => rv.push(...e))
-		return rv
-	})
-}
-
-main().then(console.dir).catch(console.error)