Dropdown: TypeError: this.getOptionLabel(...).toLocaleLowerCase is not a function

[shdb2]

Describe the bug

Declaring a dropdown with a filter or as editable with e.g. primitive number values (which are allowed according to the documentation), breaks the dropdown filter/edit option with the following error:

ERROR TypeError: this.getOptionLabel(...).toLocaleLowerCase is not a function
at _Dropdown.isOptionMatched (primeng-dropdown.mjs:2057:70)
at primeng-dropdown.mjs:2033:101
at Array.findIndex ()
at _Dropdown.searchOptions (primeng-dropdown.mjs:2033:76)
at _Dropdown.onEditableInput (primeng-dropdown.mjs:1632:26)
at Dropdown_input_3_Template_input_input_0_listener (primeng-dropdown.mjs:142:37)

Same problem as in issue #14370 and #14682: Has not been fixed yet despite the other issues being closed.

Environment

Chrome

Reproducer

No response

Angular version

17.2.x

PrimeNG version

17.7.0

Build / Runtime

Angular CLI App

Language

TypeScript

Node version (for AoT issues node --version)

20.11.0

Browser(s)

No response

Steps to reproduce the behavior

Stackblitz: https://stackblitz.com/~/github.com/shdb2/primeng-dropdown-test-v17

Expected behavior

Filtering and editing should be possible.

[dmitrymizernik]

I have the same problem with p-multiSelect after updating on 17.7.0.

[kongshu612]

this should be a bug from primeng side. or it is a break change.

• you need to provide the filterFields property.
• or if you option is like {label:string,value:xxx}[], you can bypass it by provide the optionLabel, optionValue.
• or if your options are string[], it works as expected
  if you see code from 16.9.1.

const filteredOptions =
                !this.filterBy && !this.filterFields && !this.optionValue
                    ? this.options.filter((option) => option.toLowerCase().indexOf(this._filterValue().toLowerCase()) !== -1)
                    : this.filterService.filter(options, this.searchFields(), this._filterValue(), this.filterMatchMode, this.filterLocale);

Seems primeng Team has some ideas about the filterBy and filterFields. but that part is not completed.

@mehmetcetin01140 , Could you help to make it compatible for our existing code?