fetchWithSelected, fetchWithExcluded

New Feature / Enhancement Checklist

• I am not disclosing a vulnerability.
• I am not just asking a question.
• I have searched through existing issues.

Current Limitation

Parse.Query has a include, exclude for selecting only some columns.
But there is no feature like that for fetch method

Feature / Enhancement Description

fetchWithSelect, fetchWithExclude can be useful methods for specific column only.

Example Use Case

fetchWithSelected(['name', 'score'], {useMasterKey: true}) 
fetchWithExcluded(['name', 'score'], {useMasterKey: true}) 

const getPartnerInfo = async (userId: string) => {
  const user = new Parse.User()
  user.id = userId
  await user.fetchWithExcluded(['sensitiveData', 'phoneNumber'], {useMasterKey: true}) 

  return user
}

Alternatives / Workarounds

Fetch with query:

const getPartnerInfo = async (userId: string) => {
  const query = new Parse.Query(Parse.User)
  query.equalTo('objectId', userId)
  query.exclude(['sensitiveData', 'phoneNumber'])
  return query.first({useMasterKey: true})
}

3rd Party References

(none)

Start with the Parse.Query fetch, select, and exclude entry points to understand how field selection currently works. Define the behavior of fetchWithSelected and fetchWithExcluded, including their option handling, and verify that fetching an object returns only the requested fields or omits the excluded fields.