1

I am trying to call an Apex method imperatively from LWC. The method accepts an Integer parameter. When I call this Apex method using a wired method it works fine, without any error. But when I call it imperatively from the LWC, it throws an error Value provided is invalid for action parameter 'i' of type 'Integer'

import { LightningElement, track, wire } from 'lwc';
import method from '@salesforce/apex/MyClass.method';

export default class MyComponent extends LightningElement {
  i = 5;
  @track messageFromImperative = '';
  @track messageFromWiredCall = '';
  @track errorFromImperative = '';
  @track errorFromWiredCall = '';

  @wire(method, {i: '$i'}) 
  getMessage({data, error}) {
    this.messageFromWiredCall = data;
    this.errorFromWiredCall = error;
  }

  handleClick() {
    method({i: '$i'})
      .then(result => { this.messageFromImperative = result })
      .catch(error => { this.errorFromImperative = error })
  }
}
//Apex class
public with sharing class MyClass {
    @AuraEnabled(cacheable=true)
    public static string method(Integer i){
        return 'Integer sent in '+ i;
    }
}
5

In case of imperative call, the parameter you are sending to apex shouldn't be reactive, so instead of writing
{i: '$i'}

you need to write<

{i: this.i}

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.