/// migrate((db) => { const dao = new Dao(db) const collection = dao.findCollectionByNameOrId("zfbbb4gbdk9dh6k") // add collection.schema.addField(new SchemaField({ "system": false, "id": "ghj1hkic", "name": "confidence", "type": "number", "required": false, "presentable": false, "unique": false, "options": { "min": null, "max": null, "noDecimal": false } })) return dao.saveCollection(collection) }, (db) => { const dao = new Dao(db) const collection = dao.findCollectionByNameOrId("zfbbb4gbdk9dh6k") // remove collection.schema.removeField("ghj1hkic") return dao.saveCollection(collection) })