validate one field based on another field value

[bhargavavarma]

Describe the bug

We have 2 select fields named select_field1 and select_field2 and both are dependent on each other. when select_field1 value is changing, the select_field2 should also be validated and show error message based on validate function. We are passing select_field1 and its value to useField of select_field2, select_field2 component is re rendering when select_field1 value changes, but the select_field2 error value is not getting set.

[joepuzzo]

Are you using paired validation ??? https://teslamotors.github.io/informed/?path=/story/validation--paired-validation

[joepuzzo]

you should not be trying to use useField or useFieldState at this point. Create your custom inputs once with useField and then you should never be touching that hook again.

[joepuzzo]

<Input
    name="password"
    id="notify-password"
    validate={validatePassword}
    validateOnChange
    validateWhen={['confirmPassword']}
  />
  <Input
    name="confirmPassword"
    id="notify-confirm-password"
    validate={validateConfim}
    validateOnChange
    validateWhen={['password']}
  />
 <button type="submit">Submit</button>
</Form>;

[bhargavavarma]

Are you using paired validation ??? https://teslamotors.github.io/informed/?path=/story/validation--paired-validation

@joepuzzo
Both the select fields will have same validate function. In validate function we compare the user selected start date and end date values, if startDate > endDate will return an error.

We have used validateWhen, but also we couldn't achieve the desired output.

[joepuzzo]

did you do exactly as the docs show? Can you recreate issue in a code sandbox https://teslamotors.github.io/informed/?path=/story/playground--format-example

[joepuzzo]

https://codesandbox.io/s/validatepaireddate-71b7pt?file=/App.js

See this example working ^^^^

[bhargavavarma]

https://codesandbox.io/s/validatepaireddate-71b7pt?file=/App.js

See this example working ^^^^

its working. Thankyou @joepuzzo