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Asked: 2024-09-21T19:58:17+05:30

How can I retrieve the initial validation error when using Yup to validate an object schema?

Hey everyone! I’m currently working on a project where I’m using Yup for validation, and I’ve hit a bit of a snag. I need to retrieve the initial validation error when validating an object schema, but I’m not quite sure how to do it effectively.

I’ve tried a few approaches, but I keep getting stuck. I want to be able to catch the first validation error that Yup throws, so I can display it to the user right away.

Has anyone else encountered this issue? How do you go about retrieving that initial validation error? Any tips or example code snippets would be super helpful! Thanks in advance!

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    3 Answers


    1. Re: Yup Validation Error Handling

      Hey there!

      I totally get where you’re coming from. Working with Yup for validation can be tricky, especially when you’re trying to get just that first validation error. Here’s a simple way to achieve what you want:

      
import * as Yup from 'yup';

const schema = Yup.object().shape({
  name: Yup.string().required('Name is required'),
  email: Yup.string().email('Invalid email format').required('Email is required'),
});

const validateData = async (data) => {
  try {
    await schema.validate(data, { abortEarly: false });
  } catch (err) {
    // Getting the first validation error
    const firstError = err.errors[0];
    console.log(firstError); // You can display this error to the user
    return firstError;
  }
};

// Example usage
const formData = {
  name: '',
  email: 'invalid-email',
};

validateData(formData);

      In this snippet, using `abortEarly: false` allows Yup to collect all the errors. However, if you just want the first error message, you can access it via the `err.errors` array. The first element will be your initial validation error, which you can then display to your user.

      I hope this helps! Let me know if you have any further questions.




    2. Yup Validation Help

      Getting Initial Validation Error with Yup

      Hey there!

      I totally understand what you’re going through. Yup can be a bit tricky when it comes to catching validation errors.

      To retrieve the first validation error, you can use the validate method with abortEarly set to true. This will make Yup stop at the first error it finds. Here’s a simple example:

      
import * as Yup from 'yup';

const schema = Yup.object().shape({
    name: Yup.string().required('Name is required'),
    email: Yup.string().email('Invalid email').required('Email is required'),
});

const data = {
    name: '',
    email: 'not-an-email'
};

schema.validate(data, { abortEarly: true })
    .catch((err) => {
        console.log(err.message); // This will log the first validation error
    });

      In this example, since the name field is empty, it will return the error message “Name is required” as the first error.

      Feel free to modify the schema and data as needed for your project!

      I hope this helps you get the initial error message you need. If you have any more questions, just ask!



    3. To retrieve the initial validation error using Yup, you can utilize the `validate` or `validateSync` methods, both of which will throw a validation error when the validation fails. To capture the first error, you should wrap your validation logic in a try-catch block. This allows you to handle the error gracefully and extract the message directly from the caught error object. Here’s an example of how to do it: 

            const schema = Yup.object().shape({
        email: Yup.string().email().required(),
        password: Yup.string().min(6).required(),
      });

      async function validateInput(input) {
        try {
          await schema.validate(input);
        } catch (err) {
          console.error(err.errors[0]);
          return err.errors[0]; // This will give you the first validation error
        }
      }

      If you prefer synchronous validation, you can use `validateSync` in a similar structure but without handling promises. Remember that capturing errors quickly in your UI can enhance user experience significantly, so consider displaying the first error immediately upon validation failure.