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I was trying to validate a particular field in an JSON request file.

the field should be between 1-160 characters in length and should NOT allow any special characters .

I tried the below . But it does not work . Any inputs will be deeply appreciated.

"SMSContent": {
              "id": "http://jsonschema.net/Request/Data/SMSContent",
              "type": "string",
               "pattern": "[a-zA-Z]{1,160}"
              }
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  • I also tried the below . does not work :( "SMSContent": { "id": "jsonschema.net/Request/Data/SMSContent", "type": "string", "minLength": 1, "maxLength": 160, "pattern": "[0-9A-Za-z]{1,160}" } Commented May 5, 2016 at 21:01
  • Have you tried without {1,160} since you are using minLength and maxLength? Not all regex implementation support the {n,m} notation. That could be the problem you are running into. Commented May 5, 2016 at 21:59
  • 1
    Possible duplicate of Using RegEx in JSON Schema Commented Sep 11, 2016 at 9:34
  • You need to add a $ to indicate the end of the string like this: "pattern": "[a-zA-Z]{1,160}$" Commented Sep 27, 2016 at 11:52
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