The campingList JavaScript controller isn't setting the 'item' as a parameter or saving the record correctly.

My code is as follows:

1---Camping List Component

<aura:component controller="CampingListController">
	
    <aura:handler name="init" action="{!c.doInit}" value="{!this}"/>
    
    <aura:handler name="addItem" event="c:addItemEvent"
   	action="{!c.handleAddItem }"/>
    
    <aura:attribute name="newItem" type="Camping_Item__c"
     default="{ 'sobjectType': 'Camping_Item__c',
                    'Name': '',
                    'Quantity__c': 0,
                    'Price__c': 0,
                    'Packed__c': false }"/>
    
    <aura:attribute name="items" type="Camping_Item__c[]"/>
    
    <ol>
    <li>Bug Spray</li>
    <li>Bear Repellant</li>
    <li>Goat Food</li>
    </ol>
    
       <!-- NEW EXPENSE FORM -->
    <div class="slds-col slds-col--padded slds-p-top--large">

        <c:campingListForm/>

    </div>
    <!-- / NEW EXPENSE FORM -->    
   

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

</aura:component>

2---Camping List Controller
 

({
    // Load items from Salesforce
	doInit: function(component, event, helper) {

    // Create the action
    var action = component.get("c.getItems");

    // Add callback behavior for when response is received
    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);
        }
    });

    // Send action off to be executed
    $A.enqueueAction(action);
},

    
    handleAddItem: function(component, event, helper) {
    var newItem = event.getParam("item");
    //helper.createItem(component, newItem);
        this.saveItem(component, item, function(response){
        var state = response.getState();
        if (component.isValid() && state === "SUCCESS") {
            var items = component.get("v.items");
            items.push(response.getReturnValue());
            component.set("v.items", items);
        }
    }
          
}
                      
})

3---Camping List Helper

Empty

4---Camping List Form
 

<aura:component >
	
    <aura:registerEvent name="addItem" type="c:addItemEvent"/>
        <!-- CREATE NEW ITEM FORM -->
    <form class="slds-form--stacked">

      <div class="slds-form-element slds-is-required">
          <div class="slds-form-element__control">
              <ui:inputText aura:id="itemname" label="Name"
                  class="slds-input"
                  labelClass="slds-form-element__label"
                  value="{!v.newItem.Name}"
                  required="true"/>

          </div>
     </div>

     <div class="slds-form-element slds-is-required">
          <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}"
                  required="true"/>

          </div>
      </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">
          <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">
          <ui:button label="Create Camping Item"
              class="slds-button slds-button--brand"
              press="{!c.clickCreateItem}"/>
      </div>

    </form>
    <!-- / CREATE NEW ITEM FORM -->
</aura:component>

5---CampingListFormController
 

({
    
    clickCreateItem: function(component, event, helper) {    
    if(helper.validateItemForm(component)){
        // Create the new item
        var newItem = component.get("v.newItem");
        helper.createItem(component, newItem);
    }
        
        }

})

6---CampingListFormHelper
 

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

		validateItemForm: function(component) {
		
              // Simplistic error checking
        var validItem = true;

        // Name must not be blank
        var nameField = component.find("itemname");
        var itemname = nameField.get("v.value");
        if ($A.util.isEmpty(itemname)){
            validItem = false;
            nameField.set("v.errors", [{message:"Item name can't be blank."}]);
        }
        else {
            nameField.set("v.errors", null);
        }
        
        // Quantity must not be blank
        var quantityField = component.find("quantity");
        var quantity = nameField.get("v.value");
        if ($A.util.isEmpty(quantity)){
            validItem = false;
            quantityField.set("v.errors", [{message:"Quantity can't be blank."}]);
        }
        else {
            quantityField.set("v.errors", null);
        }
		// Price must not be blank
        var priceField = component.find("price");
        var price = priceField.get("v.value");
        if ($A.util.isEmpty(price)){
            validItem = false;
            priceField.set("v.errors", [{message:"Price can't be blank."}]);
        }
        else {
            quantityField.set("v.errors", null);
        }
            return validItem;

	}
})

I am still getting this error:



Any help would be appreciated.