Add custom item in ReferenceArrayInput

[alihesari]

This component fetches the possible values in the reference resource. If I want to select All values, I need a Select All item. Values in the reference resource don't have Select All item and I don't want add Select All item in the reference resource json to display it in ReferenceArrayInput list. So in my opinion, you add a new feature to display Select All item or any custom item in ReferenceArrayInput list.

<ReferenceArrayInput source="tag_ids" reference="tags" customItems={[ {'selectAll': 'select All'}, {'Key': 'Value'}]}>
    <SelectArrayInput optionText="name" />
</ReferenceArrayInput>

[fzaninotto]

-1 for your solution: it's not the job of the <ReferenceArrayInput> to provide that feature, but of its child. Think about the case where the <SelectArrayInput> is replaced by a double list with a buttons to select/deselect an item. A "select all" option wouldn't make sense in that case.

So if the enhancement needs to be done, it's by a allowSelectAll prop in the `SelectArrayInput`` component.

[alihesari]

@fzaninotto Yes, you are right. Thank you for the explanation.

[DanStorm]

Any progress on this enhancement or is a work around possible? A method to 'Select All/ Deselect All' for ReferenceArrayInput:SelectArrayInput is very important functionality for our app. Thanks!

[fzaninotto]

The core team won't work on this feature for the near future, as we don't need it. Feel free to open a Pull Request for it.

[jdemangeon]

According the previous message and the activity on this issue, I closing it.