Value Must be Unique

The RuleUniqueValue attribute demands that there must not be any objects that have a particular property set to the same value as the current object's property. Here, this rule is applied to the UniqueValue and Collection properties.
To check this rule, save the current object.
Name AscendingNot filtered
Unique Value Not filtered
EditInvalid RuleUniqueValueObject 1Non-unique string
EditInvalid RuleUniqueValueObject 2Non-unique string
EditValid RuleUniqueValueObjectThis string is unique
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