Did not handle invalid input for fields in filter

[nus-pe-bot]

Problem

When user input an invalid field for filter, there isn't any error messages warning the user.

Steps to reproduce

filter m/m

Expected

Error: the module m does not exist.

Actual

0 persons listed!

Screenshot

Potential improvement

add error message

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_{[original: nus-cs2103-AY2425S1/pe-interim#2883] [original labels: type.FeatureFlaw severity.Low]}

[tanyqcollin]

Team's Response

The example you gave was filter a person with module m, and this did not match any existing records, the system correctly indicated that 0 person listed!. This is a valid outcome as the filter simply narrow down the list based on the given input, regardless of whether the input matches existing data.

Duplicate status (if any):

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