Validate path variable size

Question

I found this example how to validate path variable: https://www.mkyong.com/spring-boot/spring-rest-validation-example/

@PostMapping(value = "/payment/{unique_transaction_id}")
      public ResponseEntity<StringResponseDTO> handleWpfMessage(@PathVariable("unique_transaction_id") @Valid @Max(32) String unique_transaction_id) throws Exception {

Can I add @Valid infant of the limitation for String @Max(32) or I have to add @Validated at class level as it is shown in the tutorial?

Hemant Patel · Accepted Answer · 2019-04-03 09:18:54Z

4

You can define regex for your path variable

@PostMapping(value = "/payment/{unique_transaction_id:[a-zA-Z0-9]{0,32}}")

edited Apr 3, 2019 at 9:18

answered Apr 3, 2019 at 9:12

Hemant Patel

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7 Comments

Peter Penzov Over a year ago

But should I add @Valid at class level?

Hemant Patel Over a year ago

No, not needed, @Valid validates all the constraints defined in your request body POJO class.

Peter Penzov Over a year ago

Is there other way to apply [a-zA-Z0-9] restriction with annotations?

Hemant Patel Over a year ago

I don't think (or I don't know) there exists any annotation for the same purpose. There are other ways like verifying it in a filter / interceptor but it's not straight forward like above solution.

Hemant Patel Over a year ago

This might be an enhancement in spring for the same purpose adding a field regex in @PathVariable annotation.

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