2021-07-16-add-strict-mode-for-list-fields.md

title	issue	author
Add strict mode for list fields	NEXT-15170	Timo Altholtmann

Core

• Added property strict to the Listfield. If set to true, the ListField->decode() will always return a non associative array.

---

Upgrade Information

ListField strict mode

A ListField will now always return a non associative array if the strict mode is true. This will be the default in 6.5.0. Please ensure that the data is saved as non associative array or switch to JsonField instead.

Valid listField before:

Array
(
    [0] => baz
    [foo] => bar
    [1] => Array
        (
            [foo2] => Array
                (
                    [foo3] => bar2
                )
        )
)

Valid ListField after:

Array
(
    [0] => baz
    [1] => bar
    [2] => Array
        (
            [foo2] => Array
                (
                    [foo3] => bar2
                )
        )
)