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Im using the aura:method in my lightning component, but I want to get the data from the apex class, so that i'm tying to pass the value from my component to the aura:method but i don't know how to pass the value for asynchronous call, Please help me..

https://developer.salesforce.com/docs/atlas.en-us.lightning.meta/lightning/js_cmp_methods_async.htm

method definition:

aura:method component QuoteLineItemHelper_Cmp

<aura:method name="echo" description="Sample method with server-side call">
        <aura:attribute name="quoteId" type="String"/>
        <aura:attribute name="callback" type="Function" />
    </aura:method>

Called from component:

<c:QuoteLineItemHelper_Cmp aura:id="child" />



 var recordId  = component.get("v.recordId");
var childCmp = component.find("child");
     childCmp.echo(recordId,function(result) {
                console.log("callback for aura:method was executed");
                console.log("result: " + result);
            });

is this way of passing the parameter to the aura:mehtod is correct, it is not working for me..

  • Are you trying to call an <aura:method> with a parameter that you are getting from your Apex controller, or are you trying to return data from an <aura:method> that is coming from the Apex controller? The latter is what your link is covering. – David Reed Apr 12 '18 at 14:07
  • Yes.. Im passing the record id from my component to <aura:method> and i wrote a function in <aura:method> to get record from controller and then the <aura:method> will return those values back to the component. i don't know how to pass the parameter value from component to asynchronous call aura:method – Parthiban Apr 12 '18 at 14:11
  • The article that you linked shows how to implement this exact structure. Can you edit your question to be more specific about what aspect you are struggling with? – David Reed Apr 12 '18 at 14:13
  • In that link they showed how to call the function alone in the aura:method but how to pass the parameter.. from component to aura:method var childCmp = component.find("child"); // call the aura:method in the child component childCmp.echo(function(result) { console.log("callback for aura:method was executed"); console.log("result: " + result); }); – Parthiban Apr 12 '18 at 14:16
  • What does "not working" mean? You need to be specific about where and how it fails, whether you receive any errors, and what the JavaScript console shows. Please read through How to Ask; it is really helpful if you can start with this information so we don't play 20 questions. – David Reed Apr 12 '18 at 14:49
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You can pass an arbitrary number of parameters to an <aura:method>, whether or not that method ultimately calls an asynchronous function.

Here's an example from the <aura:method> documentation:

<aura:method name="sampleMethod" action="{!c.doAction}" 
  description="Sample method with parameters"> 
    <aura:attribute name="param1" type="String" default="parameter 1"/> 
    <aura:attribute name="param2" type="Object" /> 
</aura:method>

You access these in JavaScript by doing

    var params = event.getParam('arguments');
    if (params) {
        var param1 = params.param1;
        // get more params the same way.

It doesn't matter if one of the params is a callback function to receive asynchronous results because fundamentally all <aura:method> parameters are passed the same way.

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