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Add "prevent validators mutating data" to design decisions
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samdark committed Oct 24, 2019
1 parent fb3f9de commit 7f0b3752dc113b6ccb83514cb29f631dd66f763c
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@@ -76,3 +76,10 @@ Yii 2 has its own versioning policy. Problems:
- Composer rely on SemVer
- It is hard to maintain framework built on top of packages if versioning policy
isn't strict

## Prevent validators mutating data

In Yii 1 and Yii 2 validators such as "date" were mutating data. It was confusing for validation process that was
not initially meant to mutate data it validates.

[See related discussion](

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