Core Classes/Fields

Parse will never delete these fields on ALL classes if not provided in a class schema

objectId
createdAt
updatedAt
ACL

Parse Server will never delete the following fields from any class, even if these fields are not defined in a class schema.

_User
- username
- password
- email
- emailVerified
- authData
_Installation
- installationId
- deviceToken
- channels
- deviceType
- pushType
- GCMSenderId
- timeZone
- localeIdentifier
- badge
- appVersion
- appName
- appIdentifier
- parseVersion
_Role
- name
- users
- roles
_Session
- user
- installationId
- sessionToken
- expiresAt
- createdWith
_Product
- productIdentifier
- download
- downloadName
- icon
- order
- title
- subtitle
_PushStatus
- pushTime
- source
- query
- payload
- title
- expiry
- expiration_interval
- status
- numSent
- numFailed
- pushHash
- errorMessage
- sentPerType
- failedPerType
- sentPerUTCOffset
- failedPerUTCOffset
- count
_JobStatus
- jobName
- source
- status
- message
- params
- finishedAt
_JobSchedule
- jobName
- description
- params
- startAfter
- daysOfWeek
- timeOfDay
- lastRun
- repeatMinutes
_Audience
- objectId
- name
- query
- lastUsed
- timesUsed
_Idempotency
- reqId
- expire