Hi,

I can't pass the challenge (https://developer.salesforce.com/trailhead/force_com_dev_intermediate/lex_dev_lc_basics/lex_dev_lc_basics_events). This is the error when check challenge:

Challenge Not yet complete... here's what's wrong: 
The campingList JavaScript controller isn't adding the new record to the 'items' value provider.

I tryed in the browser add new Camping Items and it's working correctly. The item is added to database and the list is updated.

This is my code:

campingList Component

<aura:component controller="CampingListController">
    
    <aura:handler name="init" action="{!c.doInit}" value="{!this}"/>
    <aura:handler name="addItem" event="c:addItemEvent" action="{!c.handleAddItem}"/>
    
    <div class="slds-page-header" role="banner">

      <div class="slds-grid">

        <div class="slds-col">

          <p class="slds-text-heading--label">Camping Items</p>

          <h1 class="slds-text-heading--medium">My Camping Items</h1>

        </div>

      </div>

    </div>

      
  <div aria-labelledby="newitemform">

      <fieldset class="slds-box slds-theme--default slds-container--small">
    
        <c:campingListForm />
    
      </fieldset>

	</div>
    
    
     <aura:attribute name="items" type="Camping_Item__c[]"/>

    <div class="slds-card slds-p-top--medium">
        <header class="slds-card__header">
            <h3 class="slds-text-heading--small">Camping List Items</h3>
        </header>
        
        <section class="slds-card__body">
            <div id="list" class="row">
                <aura:iteration items="{!v.items}" var="campItem">
                    <c:campingListItem item="{!campItem}"/>
                </aura:iteration>
            </div>
        </section>
    </div>

</aura:component>

campingList Controller.js

({
    
    doInit: function(component, event, helper) {
    
        var action = component.get("c.getItems");
    
        action.setCallback(this, function(response) {
            var state = response.getState();
            if (component.isValid() && state === "SUCCESS") {
                component.set("v.items", response.getReturnValue());
            }
            else {
                console.log("Failed with state: " + state);
            }
        });
    
        $A.enqueueAction(action);
    },    
    
    handleAddItem: function(component, event, helper) {
        var item = event.getParam("item");
                
        var action = component.get("c.saveItem");
        action.setParams({
            "item": item
        });
        
        action.setCallback(this, function(response){
            var state = response.getState();
            if (component.isValid() && state === "SUCCESS") {        
                var theItems = component.get("v.items");
                theItems.push(item);
                component.set("v.items",theItems);
            }
        });
        $A.enqueueAction(action);
    }
    
})

CampingListController

public with sharing class CampingListController {

    @AuraEnabled 
    public static List<Camping_Item__c> getItems() {
        return [SELECT Id, Name, Price__c, Quantity__c, Packed__c FROM Camping_Item__c];
    }
    
    @AuraEnabled
    public static Camping_Item__c saveItem(Camping_Item__c item) {
        upsert item;
        return item;
    }
}

CampingListForm Component

<aura:component >
    
     <aura:attribute name="newItem" type="Camping_Item__c"
     default="{ 'sobjectType': 'Camping_Item__c',
                    'Name': '',
                    'Packed__c': false,
                    'Price__c': '0',
                    'Quantity__c': '0' }"/>
	<aura:registerEvent name="addItem" type="c:addItemEvent"/>
    
  <div aria-labelledby="newitemform">
      <fieldset class="slds-box slds-theme--default slds-container--small">
    
        <legend id="newitemform" class="slds-text-heading--small 
          slds-p-vertical--medium">
          Add Camping Item
        </legend>
    
        <form class="slds-form--stacked">
    
          <div class="slds-form-element slds-is-required">
              <div class="slds-form-element__control">
                  <ui:inputText aura:id="name" label="Camping Item Name"
                      class="slds-input"
                      labelClass="slds-form-element__label"
                      value="{!v.newItem.Name}"
                      required="true"/>
              </div>
         </div>
            
          <div class="slds-form-element">
              <ui:inputCheckbox aura:id="packed" label="Packed?"
                  class="slds-checkbox"
                  labelClass="slds-form-element__label"
                  value="{!v.newItem.Packed__c}"/>
          </div>
            
        <div class="slds-form-element">
              <div class="slds-form-element__control">
                  <ui:inputCurrency aura:id="price" label="Price"
                      class="slds-input"
                      labelClass="slds-form-element__label"
                      value="{!v.newItem.Price__c}" />
    
              </div>
          </div>
    
         <div class="slds-form-element">
              <div class="slds-form-element__control">
                  <ui:inputNumber aura:id="quantity" label="Quantity"
                      class="slds-input"
                      labelClass="slds-form-element__label"
                      value="{!v.newItem.Quantity__c}"/>
    
              </div>
          </div>
    
          <div class="slds-form-element">
              <ui:button label="Create Camping Item"
                  class="slds-button slds-button--brand"
                  press="{!c.clickCreateCampingItem}"/>
          </div>
    
        </form>
    
      </fieldset>
</div>

</aura:component>

CampingListForm Controller.js

({    
    
    clickCreateCampingItem : function(component, event, helper) {
        
        var validCamping = true;

        // Name must not be blank
        var nameField = component.find("name");
        var expname = nameField.get("v.value");
        if ($A.util.isEmpty(expname)){
            validCamping = false;
            nameField.set("v.errors", [{message:"Camping Item name can't be blank."}]);
        }
        else {
            nameField.set("v.errors", null);
        }

        
        var priceField = component.find("price");
        var price = priceField.get("v.value");
        if ($A.util.isEmpty(price) || isNaN(price) || (price <= 0.0)){
            validCamping = false;
            priceField.set("v.errors", [{message:"Camping Item price can't be blank."}]);
        }
        else {
            priceField.set("v.errors", null);
        }
        
        var quantityField = component.find("quantity");
        var quantity = quantityField.get("v.value");
        if ($A.util.isEmpty(quantity) || isNaN(quantity) || (quantity <= 0)){
            validCamping = false;
            quantityField.set("v.errors", [{message:"Camping Item quantity can't be blank."}]);
        }
        else {
            quantityField.set("v.errors", null);
        }

        if(validCamping){
            
            helper.createItem(component);
            
        }
        
    },
})

CampingListForm Helper.js

({
    
     createItem : function(component) {
        var newItem = component.get("v.newItem");
        var addEvent = component.getEvent("addItem");
        addEvent.setParams({"item" : newItem});
        addEvent.fire();
        component.set("v.newItem",
                     { 'sobjectType': 'Camping_Item__c',
                    'Name': '',
                    'Packed__c': false,
                    'Price__c': 0,
                    'Quantity__c': 0});
    }
})

Could anyone help me?

Thanks,
Regards.

Challenge - Create a form to enter new items and display the list of items entered. To make our camping list look more appealing, change the campingHeader component to use the SLDS. Similar to the unit, style the Camping List H1 inside the slds-page-header. Modify the campingList component to contain an input form and an iteration of campingListItem components for displaying the items entered.
The component requires an attribute named items with the type of an array of camping item custom objects.
The component requires an attribute named newItem of type Camping_Item__c with default quantity and price values of 0.
The component displays the Name, Quantity, Price, and Packed form fields with the appropriate input component types and values from the newItem attribute.
The JavaScript controller checks to ensure that the Name, Quantity and Price values submitted are not null.
If the form is valid, the JavaScript controller pushes the newItem onto the array of existing items, triggers the notification that the items value provider has changed, and resets the newItem value provider with a blank sObjectType of Camping_Item__c.


My answer - 
<aura:component >
<aura:attribute name="items" type="Camping_Item__c[]"/>
<aura:attribute name="newitem" type="Camping_Item__c[]"  default="{ 'sobjectType': 'Camping_Item__c',
                   'Quantity__c'=0, 'Price__c'=0}"/>
 <p>Name:
        <ui:inputText value="{!v.newitem.name}"/>
    </p>    
  <p>Packed:
        <ui:inputCheckbox value="{!v.newitem.Packed__c}"/>
     
    </p>    
  <p>Price:
        <ui:inputCurrency value="{!v.newitem.Price__c}"/>
    </p>
    <p>Quantity:
        <ui:inputNumber value="{!v.newitem.Quantity__c}"/>
    </p>
</aura:component>


Error -

Challenge Not yet complete... here's what's wrong: 
The campingList component isn't iterating the array of 'items' and creating 'campingListItem' components.

Please share the correct solution.

Hello I'm new to Salesforce and I'm doing the trailhead to learn.
But I'm stuck at this challenge in Lightning Module.

Here's the challenge:
Create a simple Lightning component with a styled headline. The headline must use an H1 tag with a CSS class that enforces a 24px font-size. Make the component available in the Navigation Menu of Salesforce1.The component must be named 'MyLightningComponent'.
The component must include an H1 tag with a CSS class named 'headline'. The 'headline' CSS class must set a font-size of 24px.
The Lightning Component tab that is added to Salesforce1 must be called 'MyLightning'.

And here's what I did:

MyLightningComponent.cmp

<aura:component implements='force:appHostable'>
    <div class="headline">
    <h1>My Lightning Component</h1>
    </div>
</aura:component>

MyLightningComponentApp.app

<aura:application>
    <h1>Hello Lightning App!</h1>
    <c:MyLightningComponent />
</aura:application>

MyLightningComponent.css

.THIS {
}

.THIS.headline{
    font-size:24px;
}

I created the tabs in the Salesforce1 and everithing looks right but I can't pass the challenge because it's aways return a error saying "The component does not include an H1 tag with a 'headline' CSS class"

I do no what to do with this error.