Add optional Validate() error method #102
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nodivbyzero
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Apr 16, 2025
## Fixes Or Enhances This Pull Requests adds a new tag called `isvalid` If the field is marked with the validator tag `isvalid`, the type must implement the interface `Validate() error` and the return must be nil to be considered `valid` A possible use case is: when dealing with Enumerations, the type can support a method `Validate() error` to check if the value is in specific the range defined. If we use [enumer](https://github.com/dmarkham/enumer) it generates a `IsA<Type>() bool` method that can be used to verify if the enumeration is valid or not, instead force the `oneof` tag (that needs to be always updated when we add one new value. I wrote a pull request to add a Validate method on enumerations [here](dmarkham/enumer#102) and the interface `Validate() error` seems pretty common. It may clash with existing tags that people may register, this is something that I don't know how to solve. **Make sure that you've checked the boxes below before you submit PR:** - [X] Tests exist or have been written that cover this particular change. @go-playground/validator-maintainers --------- Co-authored-by: nodivbyzero <nodivbyzero@gmail.com>
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port of #82
this pull request will adds an optional method
Validate() error-- and this is a very common interface -- that return an error if theIsA<Type>() boolreturns false.The advantage over
IsA<Type>() boolis the interface. Makes easier to integrate with other tools such as validators