Running Schema.purge on empty table fails #4664

Issue Description

Running purge on a schema with no data rows fails

Steps to reproduce

Run the following code for some schema. If there are no rows in the database it will fail

const schema = new Parse.Schema('Machine');
schema.purge();

Expected Results

If the table has no rows then nothing should happen

Actual Outcome

Where my script that runs the code above gives an unhandledPromiseRejectionWarning.

My server gives the following error:

[1] error: Error generating response. ParseError { code: 101, message: 'Object not found.' } code=101, message=Object not found.
[1] error: Object not found. code=101, message=Object not found.

Environment Setup

• Server

  • parse-server version (Be specific! Don't say 'latest'.) : 1.11.1
  • Operating System: Windows 10
  • Localhost

• Database

  • postgreSQL 9.6.5

Logs/Trace

See above