Fixed "dataKey" prop type in all components that use it

[nestorrente]

As done with "sortField" property in #743, this PR fixes the "dataKey" property type in the following components and its corresponding type definition files:

• DataTable
• TableBody
• Dropdown
• Listbox
• MultiSelect
• OrderList
• PickList
• SelectButton
• Timeline

[tugcekucukoglu]

dataKey is not a function type. Thanks for the PR.

[nestorrente]

Hi @tugcekucukoglu!

I think that's not right, as the dataKey prop can actually be a function. If you take a look at the code of the DataTable component, you can see that the value of the dataKey prop is passed to the ObjectUtils.resolveFieldData(), in which the field can be a function.

In fact, I'm using the dataKey prop as a function in one of my projects (where I had to fork PrimeVue in order to apply this fix for the type) and it's working like a charm. I'd like this to be solved in PrimeVue, so I can use the official version again instead of my patched fork.

Thank you for your time and consideration.

[rubasace]

Hi @tugcekucukoglu ,

I'm facing the exact same limitation. As @nestorrente showed, dataKey can actually be a function and PrimeVue code is already taking that into consideration in several places.

I think this PR should be reopen and properly reviewed.

Thank you for your time.