// Collection users
var collection = db.users.find({}).toArray()
collection.forEach(function(doc){
  doc._id = doc._id.str
  db.users2.insertOne(doc)
})
db.users.drop()
db.users2.renameCollection('users')
// =================================

// Collection userdetails
var collection = db.userdetails.find({}).toArray()
collection.forEach(function(doc){
	doc._id = doc._id.str
    doc.userId = doc.userId.str
	db.userdetails2.insertOne(doc)
})
db.userdetails.drop()
db.userdetails2.renameCollection('userdetails')
// =================================

// Collection lessons
var collection = db.lessons.find({}).toArray()
collection.forEach(function(doc){
  doc._id = doc._id.str
  doc.flashcardIds = doc.flashcardIds.map(function(item){return item.str})
  db.lessons2.insertOne(doc)
})
db.lessons.drop()
db.lessons2.renameCollection('lessons')
// =================================

// Collection items
var collection = db.items.find({}).toArray()
collection.forEach(function(doc){
  doc._id = doc._id.str
  doc.flashcardId = doc.flashcardId.str
  doc.userId = doc.userId.str
  db.items2.insertOne(doc)
})
db.items.drop()
db.items2.renameCollection('items')
// =================================

// Collection flashcards
var collection = db.flashcards.find({}).toArray()
collection.forEach(function(doc){
  doc._id = doc._id.str
  db.flashcards2.insertOne(doc)
})
db.flashcards.drop()
db.flashcards2.renameCollection('flashcards')
// =================================

// Collection courses
var collection = db.courses.find({}).toArray()
collection.forEach(function(doc){
  doc._id = doc._id.str
  db.courses2.insertOne(doc)
})
db.courses.drop()
db.courses2.renameCollection('courses')
// =================================

// Collection authtoken
var collection = db.authtoken.find({}).toArray()
collection.forEach(function(doc){
	doc._id = doc._id.str
    doc.userId = doc.userId.str
	db.authtoken2.insertOne(doc)
})
db.authtoken.drop()
db.authtoken2.renameCollection('authtoken')
// =================================