Hi all,

I am creatting search page in lightning with reference to below link.

http://www.cloudforce4u.com/2016/03/salesforce-lightning-component-example.html

i am facing error like: Error during init [TypeError: Cannot read property 'apply' of undefined]

Component:
<aura:component implements="force:appHostable" controller="oppSearchController">  
    <aura:attribute name="opportunities" type="Opportunity[]"/>
    <aura:attribute name="showtbl" type="boolean" default="false"/>
    <ui:inputText aura:id="nameopp" label="Opportunity Stage" value="enter stage" required="true"/>
    <ui:inputText aura:id="amntopp" label="Opportunity Amount >" value="enter amount" required="false"/>
    <ui:button label="Get Opportunities" press="{!c.getOpps}"/>
    <aura:if isTrue="{!v.showtbl}">    <span class="ligtn-button" style="white-space: pre;"> </span>
    <table>
            <thead>
                <tr>
                    <th><strong> Name </strong></th>
                    <th> <strong>  Stage </strong> </th>
                    <th> <strong>  Amount </strong> </th>                  
                </tr>
            </thead>
            <tbody>
                <aura:iteration var="opp" items="{!v.opportunities}">                  
                    <tr>
                        <td><a data-record="{!opp.Id}" onclick="{!c.navigateToRecord}">{!opp.Name}</a>
</td>
                        <td>{!opp.StageName}</td>
                        <td>{!opp.Amount}</td>
                    </tr>
                </aura:iteration>
            </tbody>
        </table>
        </aura:if>
</aura:component>

Client side controller:
({
 
    navigateToRecord : function(component, event, helper){
    var navEvt = $A.get("e.force:navigateToSObject");
     var selectedItem = event.currentTarget;
     var Name = selectedItem.dataset.record;
       
navEvt.setParams({
  "recordId": Name,
  "slideDevName": "detail"
});
navEvt.fire();
    },  
    getOpps: function(cmp){      
        cmp.set("v.showtbl","true");
        var action = cmp.get("c.getOpportunities");
        action.setParams({ OppStage : cmp.find("nameopp").get("v.value") , Oppamount : cmp.find("amntopp").get("v.value")});     // due this line getting above error, is there anything missing here
       
        action.setCallback(this, function(response){
            var state = response.getState();
            if (state === "SUCCESS") {
                cmp.set("v.opportunities", response.getReturnValue());
            }
        });
<span class="lightn-buton" style="white-space: pre;"> </span> $A.enqueueAction(action);
    }
})

Server side controller:
public with sharing class oppSearchController{
    @AuraEnabled
 
    public static List<Opportunity> getOpportunities(String OppStage , Integer Oppamount) {
    string stageopp = '\''+OppStage+'\'';
        List<Opportunity> opportunities =
                [SELECT Id, Name, CloseDate,Amount,StageName FROM Opportunity where Amount >: Oppamount and StageName =: OppStage];
        return opportunities;
    }
}

Please help to solve this issue.

Regards,
Shaik