Question 275094 in Javascript Question posted in
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Javascript – i am using AJV library for schema validation and facing following issue

i am having a url value where it can accept null values and string uri values only and the uri value cannot be empty , I tried with several implementations and it did not work . I am using AJV validation library version number 6.12.6.
these are my try outs

agreementURL: {
   "type": ["string", "null"],
   "if": {
     "type": "string"
   },
   "then": {
     "format": "uri",
   }
 },
Tags:

2

Answers


  1. Chosen as BEST ANSWER
    0

    in ajv schema file we can define a function according to our requirements so inorder to solve this issue , i created a function where it allows a null and string uri format .

    ajv.addKeyword('isAllowNullAndURI', {
  type: 'string',
  validate: function(schema, data) {
    if (data === null) {
      return true; 
    }
   
    if (typeof data === 'string' && data.match(/^(?:w+:)?//[^s.]+.S/)) {
      return true; 
    }
    return false; 
  },
  errors: false,
});

    agreementReportURL: {
         type : ['string','null'],
         format:'uri',
         isNotEmpty:true,
         isAllowNullAndURI:true
    },

  2. 0

    This is much easier than a custom function

    The assertion keyword minLength will only be enforced against a string value
    The annotation keyword format is not used for validation purposes unless you add the ajv-formats package.

    I would also recommend upgrading to Ajv 8+ but be sure to pass the options object with {strict:false} if you want the Ajv to abide by the official JSON Schema specification, without {strict:false} the validator does not conform to the specification

    {
  "$schema": "http://json-schema.org/draft-07/schema#",
  "type": "object",
  "properties": {
    "agreementURL": {
       "type": ["string", "null"],
       "format": "uri",
       "minLength": 1
    }
  }
}
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