[SalesForce] Lightning Component – pass variables from component to apex & get result back

I have found that not having default attributes can cause problems with binding.

UPDATE - this applies to ALL attributes, including the sobjectType and CloseDate .

Add all attributes (even if empty at this stage) that you want to write to the server, because if they are not at least initialised in the defaults area, they don't get sent.

Also there are perhaps some missing fields that are needed for the Opportunity to deserialize properly (in the internal deserialization routine that is called prior to passing it to your @AuraEnabled method).

So perhaps you could define your oppty attribute like this:

<aura:attribute name="opportunity" 
                type="Opportunity" 
                default="{ 'sobjectType': 'Opportunity',
                           'Name': 'New Opportunity',
                           'StageName': 'Initial Contact',
                           'CloseDate':'2016-08-01'} />

Or at least set the name and stage prior to passing it to your method.

Of course, you may be doing this already - I can't see what your console output is.

This is just a long shot, because you seem to have done everything else right.

So I made a Map fieldTypeMap and a component to handle the date/datetime format

Here is what I did, maybe it will be usefull for someone else.

Controller

I added the map as an attribute of my inner class into the controller:

// header/type mapping
public Map<String,String> headerTypeMap {get;set;}

I initialize it at the end of the constructor, thanks to this.headers (array of string header/field name), after the queries, like this:

        // calculation :
        runQueries();

        // mapping
        this.headerTypeMap = new Map<String,String>();
        for(String field : this.headers){
            this.headerTypeMap.put(
                field,
                Schema.getGlobalDescribe().get(objType).getDescribe().fields.getMap().get(field).getDescribe().getType()+''
            );
        }

Visualforce component

Because I often need to format date and datetime I thought it could be a good idea to create a formating component So I made a quick and dirty one:

<apex:component controller="FormatedValueController">
<apex:attribute name="dateValue" 
    type="Date" 
    assignTo="{!inputDateValue}"
    description="input value to formatTodoBlock__c record that contains data" 
/>
<apex:attribute name="datetimeValue" 
    type="Date" 
    assignTo="{!inputDateTimeValue}"
    description="input value to formatTodoBlock__c record that contains data" 
/>

{!formatedvalue}

Controller:

public class FormatedValueController {
    public Date     inputDateValue {get;set;}
    public Datetime inputDateTimeValue {get;set;}

    public String getFormatedValue(){
        String formatedValue = '';
        formatedValue += inputDateValue == null ? '' : inputDateValue.format();
        formatedValue += inputDateTimeValue == null ? '' : inputDateTimeValue.format();
        return formatedValue;
    }
}

And a quick&dirty test class too (for code coverage only):

@isTest
global class FormatedValueController_test{
    static testMethod void FormatedValueController() {
        FormatedValueController c = new FormatedValueController();
        Test.startTest ();
        c.getFormatedValue();
        Test.stopTest();
    }
}

100% you-hou ;)

And finally ...

Main Component

Oddly I need to use "{!todoBlock.headerTypeMap[header]}" everywhere, where todoBlock is the instance of my innerclass and header the var of repeat on headers attribute (table with a dynamic number of columns).

I wanted to use an apex variable for each header, kind of:

<apex:variable var="type" value="{!todoBlock.headerTypeMap[header]}" />

but for an unknown reason it just display the last header value in every loop. For example if I have DATE, DATETIME, STRING, it displays STRING, STRING, STRING. Not a big deal to use the full code, it is just less readable.

So here it is :

<apex:outputLabel rendered="{!todoBlock.headerTypeMap[header]=='DATETIME'}">
    <c:FormatedValue datetimeValue="{!rec[header]}"/>
</apex:outputLabel>

<apex:outputLabel rendered="{!todoBlock.headerTypeMap[header]=='DATE'}">
    <c:FormatedValue dateValue="{!rec[header]}"/>
</apex:outputLabel>

<apex:outputLabel rendered="{!NOT(AND(todoBlock.headerTypeMap[header]=='DATETIME',todoBlock.headerTypeMap[header]=='DATE'))}">
    {!rec[header]}
</apex:outputLabel>