[Form] Fix keep_as_list
when data is not an array
#60638
+22
−3
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The
CollectionType
handles not only arrays but alsoArrayAccess&Traversable
. However when setting itskeep_as_list
option,array_values
would then be called and crash.To avoid this, this PR reindexes the data by getting its keys and unsetting them. This is because unsetting in a loop can produce counter-intuitive results; e.g.
ArrayIterator
would skip indexes.Note that #57430 mentions another issue that would be fixed by #59910.