Sunday, 8 April 2018

Custom Lookup Creation and Example in Lightning

Hi ,

Lets how to prepare custom lookup component

Here in this example i am using "svg" component for icons but you can use lightning:icon tag instead

1)Create LC_svg component:

<aura:component >
    <aura:attribute name="class" type="String" description="CSS classname for the SVG element" />
    <aura:attribute name="xlinkHref" type="String" description="SLDS icon path. Ex: /assets/icons/utility-sprite/svg/symbols.svg#account" />
    <aura:attribute name="aria-hidden" type="String" default="true" description="aria-hidden true or false. defaults to true" />

render: function(component, helper) {
//grab attributes from the component markup
var classname = component.get("v.class");
var xlinkhref = component.get("v.xlinkHref");
var ariaHidden = component.get("v.aria-hidden");

//return an svg element w/ the attributes
var svg = document.createElementNS("", "svg");
svg.setAttribute('class', classname);
svg.setAttribute('aria-hidden', ariaHidden);
svg.innerHTML = '<use xlink:href="'+xlinkhref+'"></use>';
return svg;

2)Create SelectedObject event and  Custom Lookup Result component for getting the list of accounts based  search keyword


<aura:event type="COMPONENT" description="by this event we are passing the selected Record in the Obeerving Component">
    <aura:attribute name="RecordByEvent" type="sObject"/>


<aura:component >
    <aura:attribute name="Obj" type="sObject" />
  <!--Register the component level event-->
    <aura:registerEvent name="oSelectedObjectEvent" type="c:SelectedObject"/>
    <li role="presentation">
        <span class="slds-lookup__item-action slds-media slds-media--center" id="lookup-option-350" role="option">
         <div class="slds-media__body">
          <div class="slds-input-has-icon slds-input-has-icon--right">
            <c:LC_svg class="slds-input__icon" xlinkHref="{!$Resource.SLDS092 + '/assets/icons/standard-sprite/svg/symbols.svg#account'}" />                   
<div class="slds-lookup__result-text"><a onclick="{!c.selectRecord}">{!v.Obj.Name}</a></div>

selectRecord : function(component, event, helper){      
    // get the selected Account from list  
      var getSelectRecord = component.get("v.Obj");
    // call the event   
      var compEvent = component.getEvent("oSelectedObjectEvent");
    // set the Selected Object to the event attribute.  
     compEvent.setParams({"RecordByEvent" : getSelectRecord });  
    // fire the event;

3)Create PickListEvt.evt and CustomLookup.cmp component:

<aura:event type="Component" description="Event fire when some one selects a value in picklist" >
    <aura:attribute name="SelectedValue" type="string" description="The result of the Selection"/>

 This is the Controller Class for the Custom Lookup component.
public class LookUpController {
 public static List <sObject> fetchRecords(String searchKeyWord, String ObjName, string count) {
  String searchKey = searchKeyWord + '%';
  List < Sobject > lstOfObj =  Database.query('SELECT id, Name '+' FROM '+ObjName+' WHERE Name LIKE \''+searchKey+'\' limit ' + count);
  return lstOfObj ;

<aura:component controller="LookUpController" >    
   <aura:registerEvent name="RecordSelected" type="c:PickListEvt" description="This will Fire when the records has reached in it"/>
   <aura:attribute name="selectedRecord" type="sObject" default="{}" description="Use,for store SELECTED sObject Record"/>
   <aura:attribute name="listOfSearchRecords" type="sObject[]" description="Use,for store the list of search records which returns from apex class"/>
   <aura:attribute name="SearchKeyWord" type="string"/>
   <aura:attribute name="FieldLabel" type="String"/>
   <aura:attribute name="ObjName" type="string" default="Account"/>
   <aura:attribute name="RecordCount" type="string" default="10"/>
   <aura:attribute name="Message" type="String" default="Search Result.."/>
   <!--declare events handlers-->  
   <aura:handler name="oSelectedObjectEvent" event="c:SelectedObject" action="{!c.handleComponentEvent}"/>
   <aura:handler event="aura:waiting" action="{!c.showSpinner}"/>
   <aura:handler event="aura:doneWaiting" action="{!c.hideSpinner}"/>
   <div class="slds-m-around">
      <div aura:id="searchRes" class="slds-form-element slds-lookup slds-is-close" data-select="single">
          <aura:if isTrue="{!!empty(v.FieldLabel)}">
         <label class="slds-form-element__label" for="lookup-348"> {!v.FieldLabel}</label>
         <!--This part is for display search bar for lookup-->  
         <div class="slds-form-element__control">
            <div class="slds-input-has-icon slds-input-has-icon--right">
               <c:LC_svg class="slds-input__icon slds-show" xlinkHref="{!$Resource.SLDS092 + '/assets/icons/utility-sprite/svg/symbols.svg#search'}" />
               <!-- This markup is for when an record is selected -->
               <div aura:id="lookup-pill" class="slds-pill-container slds-hide">
                  <span class="slds-pill">
                     <span class="slds-pill__label">
                     <span class="slds-button slds-button--icon slds-pill__remove deleteIcon" onclick="{!c.clear}">
                        <c:LC_svg class="slds-button__icon" xlinkHref="{!$Resource.SLDS092 + '/assets/icons/utility-sprite/svg/symbols.svg#close'}" />
                        <span class="slds-assistive-text">Remove</span>
              <div aura:id="lookupField" class="slds-show">
               <ui:inputText updateOn="keyup" keyup="{!c.keyPressController}" aura:id="LookupGeneral"
                             class="slds-lookup__search-input slds-input " 
                             value="{!v.SearchKeyWord}" placeholder="search.." />
         <!--This part is for Display typehead lookup result List-->  
         <div class="slds-lookup__menu slds" id="lookup-348">
            <div class="slds-lookup__item--label slds-text-body--small">{!v.Message}</div>
            <center> <ui:spinner aura:id="spinner"/> </center>
            <ul class="slds-lookup__list" role="listbox">
               <aura:iteration items="{!v.listOfSearchRecords}" var="singleRec">
                  <c:CustomLookupResult Obj="{!singleRec}" />


keyPressController : function(component, event, helper) {
      // get the search Input keyword   
var getInputkeyWord = component.get("v.SearchKeyWord");
        var getObjName = component.get("v.ObjName");
        var getRecordCount = component.get("v.RecordCount");
      // check if getInputKeyWord size id more then 0 then open the lookup result List and 
      // call the helper 
      // else close the lookup result List part.   
        if( getInputkeyWord.length > 0 ){
             var forOpen = component.find("searchRes");
               $A.util.addClass(forOpen, 'slds-is-open');
               $A.util.removeClass(forOpen, 'slds-is-close');
            helper.searchHelper(component,event,getInputkeyWord, getObjName, getRecordCount);
            component.set("v.listOfSearchRecords", null ); 
             var forclose = component.find("searchRes");
               $A.util.addClass(forclose, 'slds-is-close');
               $A.util.removeClass(forclose, 'slds-is-open');
  // function for clear the Record Selaction 
    clear :function(component,event,heplper){
         var pillTarget = component.find("lookup-pill");
         var lookUpTarget = component.find("lookupField"); 
         $A.util.addClass(pillTarget, 'slds-hide');
         $A.util.removeClass(pillTarget, 'slds-show');
         $A.util.addClass(lookUpTarget, 'slds-show');
         $A.util.removeClass(lookUpTarget, 'slds-hide');
         component.set("v.listOfSearchRecords", null );
  // This function call when the end User Select any record from the result list.   
    handleComponentEvent : function(component, event, helper) {
    // get the selected Account record from the COMPONETN event  
       var selectedRecordGetFromEvent = event.getParam("RecordByEvent");
       var RecordSelected = component.getEvent("RecordSelected");     
            SelectedValue: selectedRecordGetFromEvent.Id
       component.set("v.selectedRecord" , selectedRecordGetFromEvent); 
        var forclose = component.find("lookup-pill");
           $A.util.addClass(forclose, 'slds-show');
           $A.util.removeClass(forclose, 'slds-hide');
        var forclose = component.find("searchRes");
           $A.util.addClass(forclose, 'slds-is-close');
           $A.util.removeClass(forclose, 'slds-is-open');
        var lookUpTarget = component.find("lookupField");
            $A.util.addClass(lookUpTarget, 'slds-hide');
            $A.util.removeClass(lookUpTarget, 'slds-show'); 
  // automatically call when the component is done waiting for a response to a server request.  
    hideSpinner : function (component, event, helper) {
        var spinner = component.find('spinner');
        var evt = spinner.get("e.toggle");
        evt.setParams({ isVisible : false });;    
 // automatically call when the component is waiting for a response to a server request.
    showSpinner : function (component, event, helper) {
        var spinner = component.find('spinner');
        var evt = spinner.get("e.toggle");
        evt.setParams({ isVisible : true });;    

searchHelper : function(component,event,getInputkeyWord, getObjName, getRecordCount) {
  // call the apex class method 
     var action = component.get("c.fetchRecords");
      // set param to method  
            'searchKeyWord': getInputkeyWord,
            'ObjName' : getObjName,
            'count' : getRecordCount
      // set a callBack    
        action.setCallback(this, function(response) {
            var state = response.getState();
            if (state === "SUCCESS") {
                var storeResponse = response.getReturnValue();
              // if storeResponse size is equal 0 ,display No Result Found... message on screen.
                if (storeResponse.length == 0) {
                    component.set("v.Message", 'No Result Found...');
                } else {
                    component.set("v.Message", 'Search Result...');
                // set searchResult list with return value from server.
                component.set("v.listOfSearchRecords", storeResponse);
      // enqueue the Action  

Custom Lookup Example: (Usage):

<aura:component controller="ContactSavecls">
    <aura:attribute name="contactObj" type="Contact" default="{'sobjectType':'Contact',
    <div class="slds-form-element__control">
        <ui:inputText class="slds-input" label="Last Name" value="{!v.contactObj.LastName}"/>
        <c:CustomLookup ObjName="Account" FieldLabel="Related Account"
            RecordSelected="{!c.handleRecordSelection}" />
        <ui:button press="{!c.contactSave}">Save Contact</ui:button>

handleRecordSelection : function(component, event, helper) {
component.set("v.contactObj.AccountId", event.getParam("SelectedValue"));
    contactSave:function(component, event, helper){
        var action = component.get("c.saveContact");
        var contRec = component.get("v.contactObj");
            var result = data.getReturnValue();

public class ContactSavecls{
    public static String saveContact(Contact contObj){
        insert contObj;
        return contObj.Id;




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