Postman: More descriptive tv4 validation error message

Question

I'm using postman to validate the schema of json data returned from an api.

I have a test that runs through basic http validation, then ends with:

if (tv4.error){
    console.log("Validation failed: ", tv4.error);
}

The error I get back is difficult to fathom.

Validation failed: 12:22:41.316
Object:{}
message:"Invalid type: number (expected string)"
name:"ValidationError"
type:"Error"

But I need to know which field the validation failed on. How can I get this info? The npm page for tv4 suggests that the error message should be more descriptive.

try printing the whole tv4 object if you can see anything related in that — Kamesh, Jul 21 '17 at 11:38

score 6 · Answer 1 · edited Jun 20 '20 at 09:12

6

According to the documentation of tv4, you can print the path of the error location using console.log(tv4.error.dataPath), I have no idea why this attribute is not logged in the console.

Documentation is here. The relevant section in the documentation is:

If validation returns false, then an explanation of why validation failed can be found in tv4.error.

The error object will look something like:
{
    "code": 0,
    "message": "Invalid type: string",
    "dataPath": "/intKey",
    "schemaPath": "/properties/intKey/type"
}

edited Jun 20 '20 at 09:12

Community

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answered Oct 13 '17 at 04:14

code4j

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2

The console did not log any dataPath by just logging the tv4 result: `var res = tv4.validateResult(data, schema); console.log("res",res);`. I had to do add .error.dataPath to actually see the content `console.log("path",res.error.dataPath);` – John Apr 16 '19 at 12:18

Postman: More descriptive tv4 validation error message

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