Update list_field.dart to only updateField on valid values #1
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The DropdownMenu has search enabled, which allows users to type any input. If the user types something that doesn't match an existing item, `value` is null, leading to a null pointer issue. Instead just don't update the field when null is provided.
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The DropdownMenu has search enabled, which allows users to type any input. If the user types something that doesn't match an existing item,
valueis null, leading to a null pointer issue.Instead just don't update the field when null is provided.
List of issues which are fixed by the PR
Fixes widgetbook#1151
Checklist
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