Cast keys to string on getting data from object

[michalbundyra]

Fixes:

• Error after new version of hydrator, when trying to create new input or fetch it zfcampus/zf-apigility-admin#397
• Error after new version of hydrator, when trying to create new input or fetch it using UI zfcampus/zf-apigility-admin-ui#149

When extracting data from ArrayObject or another object which int keys we are getting the following error:

Argument 1 passed to Zend\Hydrator\Filter\FilterComposite::filter() must be of the type string, integer given, called in vendor/zendframework/zend-hydrator/src/ArraySerializableHydrator.php on line 39

as we have strict type declaration.

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[froschdesign]

We had already an issue report with this problem but without an unit test. Now the problem is easy to understand. 👍

[tigran-m-dev]

any news, when this could be merged?

[weierophinney]

Thanks, @webimpress!