Invalid type provided to filter causes 500 error instead of 400

[jonahsnider]

I mistyped a query for a getMany operation and the application had a 500 error. The 500 occurred because the database schema disallowed the malformed query to be run. In my case I was performing a filter for a boolean field, but in the query I provided I had added a ' to the end of my filter, so it became

-field||eq||false
+field||eq||false'

Rather than having the operation have a 400 due to a malformed query, the CRUD module tried to run it and was stopped by the database schema.
It gave the following stacktrace (note the ' after false):

QueryFailedError: invalid input syntax for type boolean: "false'"
    at new QueryFailedError (/usr/src/discoin/node_modules/typeorm/error/QueryFailedError.js:11:28)
    at Query.callback (/usr/src/discoin/node_modules/typeorm/driver/postgres/PostgresQueryRunner.js:176:38)
    at Query.handleError (/usr/src/discoin/node_modules/pg/lib/query.js:145:17)
    at Connection.connectedErrorMessageHandler (/usr/src/discoin/node_modules/pg/lib/client.js:214:17)
    at Connection.emit (events.js:210:5)
    at Socket.<anonymous> (/usr/src/discoin/node_modules/pg/lib/connection.js:128:12)
    at Socket.emit (events.js:210:5)
    at addChunk (_stream_readable.js:309:12)
    at readableAddChunk (_stream_readable.js:290:11)
    at Socket.Readable.push (_stream_readable.js:224:10)