CBC_4_CarSearchForm.xml

<aura:component controller="CarTypeSearch" 
                implements="force:appHostable,flexipage:availableForRecordHome,force:hasRecordId">
    
    <!-- Attribute to controle visibility of New button -->
    <aura:attribute name="showNew" type="boolean" />
    <aura:attribute name="carTypes" type="Car_Type__c[]"/>
    
    <aura:handler name="init" action="{!c.doInit}" value="{!this}"/>
    
    <!-- This event will be fired when user will click on 
		search button and will selected carTypeId-->
    <aura:registerEvent name="searchFormSubmit" type="c:SearchFormSubmitEvent" />
    
	<lightning:layout horizontalAlign="center">
	    <lightning:layoutItem>
            <lightning:select name='selectItem' aura:id="carType" label='All Types' 
                              variant="label-hidden" value="">
                <option value="" text="All Types" />
                <aura:iteration items="{!v.carTypes}" var="carType">
	                <option value="{!carType.Id}" text="{!carType.Name}" />
                </aura:iteration>
           	</lightning:select>
        </lightning:layoutItem>
        
        <lightning:layoutItem padding="around-medium">
            <lightning:button label="Search" variant="brand"  onclick="{!c.onFormSubmit}"/>
            <!-- display new button on availibity -->
            <aura:if isTrue="{!v.showNew}">
	            <lightning:button variant='neutral' label='New' onclick="{!c.createRecord}"/>
		    </aura:if>
        </lightning:layoutItem>
    </lightning:layout>    
</aura:component>