I'm using a Lightning Component to update a field called "Observations__c" in Account Object.


It's working fine, but when I try to use it inside another component, I receive the following error:

EXCEPTION_THROWN [9]|System.NullPointerException: Attempted to upsert a null list

Component: 
<aura:component implements="force:lightningQuickActionWithoutHeader,flexipage:availableForRecordHome,force:hasRecordId,forceCommunity:availableForAllPageTypes" access="global" controller="getAccount">

<aura:handler name="init" action="{!c.init}" value="{!this}" />
<aura:attribute name="accounts" type="Account" />
<aura:attribute name="recordId" type="Id" />

<ltng:require styles="/resource/slds103/assets/styles/salesforce-lightning-design-system.min.css"/>

 <form>
    <ui:inputText aura:id="client"
                  label="{!$ObjectType.Account.fields.Observations__c.Label}"
                  class="form-control"
                  value="{!v.accounts.Observations__c}"
                  placeholder="Insira, caso necessário, comentários adicionais"
    />
    <br />
    <ui:button class="form-control" aura:id="button" label="Anexar observação" press="{!c.save}"/>
</form>

 </aura:component>

Controller js:
({
init : function(component, event, helper) {
    var accId = component.get("v.recordId");
    var action = component.get("c.getAcct");

    action.setParams({
        "accountId": component.get("v.recordId")
    });

    action.setCallback(this, function(data) {
        component.set("v.accounts", data.getReturnValue());
    });

    $A.enqueueAction(action);
}, 
save : function(component, event, helper) {

    var action = component.get("c.saveAcct");
    var accounts = component.get("v.accounts");

    action.setParams({"act": accounts});
    $A.enqueueAction(action);

    console.log('save ran');

}
})

Apex Controller:
public class getAccount {
    @AuraEnabled 
    public static Account getAcct(Id accountId){
        return (Account) Database.query( ' SELECT Name, Observations__c FROM Account WHERE Id =: accountId LIMIT 1 ' )[0];
    }

    @AuraEnabled 
    public static Account saveAcct(Account act){
        upsert act;
        return act;
    }  
}

I'm calling <c:sparkAccount/> in my second component, but it is not working.


What am I doing wrong?