Conflicts:
	framework/CHANGELOG.md

Conflicts:
	framework/CHANGELOG.md

ActiveQuery::one() slight refactoring

This reverts commit a5846fa2, reversing
changes made to 2a6e064a.

Check if property is set

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# especially if it merges an updated upstream into a topic branch.
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# the commit.

Merge branch 'defaultValueValidator' of github.com:Alex-Code/yii2 into Alex-Code-defaultValueValidator

Conflicts:
	framework/CHANGELOG.md