How to create custom lookup on custom object in lightning component

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Hey guys, today in this post we are going to learn about how to create custom lookup on custom object and submit the lookup value into database in lightning component.

What is lookup relationship in Salesforce?

Lookup relationship communicate between two objects. First known as Parent Object and Second Known as Child Object.

It is always created on child object. Some time we are working on child object and need to fetch the value of parent object.

In this case we need to create a lookup relationship. It will help to fetch the value of parent object.

Lookup relationship field does not required. If parent record deleted then it’s associated child record does not deleted.

We used the files in this example:-

File Name	File Type	Description
myCustomLookupCmp.cmp	Lightning Component	It is used to user interface display on the client side.
myCustomLookupCmpController.js	Component JS	It is used for communicate the javascript function to apex class method.
myCustomLookupCmp.css	CSS	For alignment the lookup popover box.
myLookupController.apxc	Apex Class Controller	For fetch the record value from database server
SVG Icon Image	Search Icon Image	Lightning Icon Reference :https://www.lightningdesignsystem.com/icons/
static resource	Zip file	Use for display the Icon from static resource

Final Output

Other related post that would you like to learn

Note:- Custom sObject >> NewStudent__c

You need to change my custom sObject name with your custom sObject name.

Step 1:-

Lightning Component [myCustomLookupCmp.cmp]

   <aura:component controller="myLookupController" implements="force:appHostable,flexipage:availableForAllPageTypes,flexipage:availableForRecordHome,force:hasRecordId,forceCommunity:availableForAllPageTypes,force:lightningQuickAction" access="global" >
    

    <aura:attribute name="studentReg" type="Registration__c" default="{'sobjectType':'Registration__c','DateOfRegistration__c':'mm/dd/yyyy'}"/>
    <aura:attribute name="studentNameItems" type="Object[]" />
    <aura:attribute name="selectedSerchItem" type="string"/>
    <aura:attribute name="selectedItemId" type="string"/>
    
    
    <div class="slds">
        <div class="slds-p-horizontal--medium slds-col slds-size_6-of-12 slds-m-bottom--medium">
            <div class="slds-form-element">
                <label class="slds-form-element__label">New Student</label>
                <div class="slds-form-element__controller">
                    <div aura:id="newStudentSpinId" class="slds-input-has-icon slds-input-has-icon--right spinnerItem">
                        <ui:inputText aura:id="newStudentId" placeholder="Search student..." class="slds-input" keyup="{!c.lookupKeySearch}" updateOn="keyup" value="{!v.studentReg.RegNewStudent__c}"/>
                        <i class="spinnerIcon" ><img src="/resource/SLDS2016/assets/images/spinners/slds_spinner_brand.gif" /></i>
                        <c:svg class="slds-input__icon" xlinkHref="/resource/SLDS2016/assets/icons/utility-sprite/svg/symbols.svg#search"/>
                    </div> 
                    
                    
                    <!--{!v.studentReg.RegNewStudent_#c.length}{!v.studentNameItems}<br/>-->
                    <div aura:id="sldsIsOpenDivId" class="slds-m-top--small slds-dropdown-trigger slds-dropdown-trigger--click dropdownPosition"> 
                        
                        <section class="slds-dropdown slds-popover slds-nubbin--top-left slds-dropdown-trigger"> 
                            <div class="slds-popover__body slds-p-vertical--xx-small slds-p-horizontal--none slds-scrollable--y" style="max-height:150px;"> 
                                <ul class="slds-dropdown__list slds-dropdown--length10">
                                    <aura:iteration items="{!v.studentNameItems}" var="studentVar" indexVar="goNumber">
                                        <li>
                                            <span class="slds-lookup__item-action slds-media"> 
                                                <c:svg class="slds-icon slds-icon-standard-contact slds-icon--small slds-m-right--xx-small"  xlinkHref="/resource/SLDS2016/assets/icons/utility-sprite/svg/symbols.svg#user" />
                                                <a id="{!studentVar.Id}" role="option" 
                                                   data-id="{!studentVar.Id}" onclick="{!c.selectSearchItem}">                                                    
                                                    {!studentVar.Name}
                                                </a>
                                            </span>   
                                            
                                        </li>
                                        
                                    </aura:iteration>      
                                </ul>
                            </div> 
                        </section>
                        
                    </div>
                    
                    
                    <div aura:id="pillListDivId" class="slds-hide">
                        <ul> 
                            <li class="slds-pill slds-show slds-show slds-m-around--none" >
                                <a  id="" role="option" onclick="{!c.removeSelectedSerchItem}" data-id="">
                                    <c:svg class="slds-icon slds-icon-standard-contact slds-icon--small slds-m-right--xx-small" xlinkHref="/resource/SLDS2016/assets/icons/utility-sprite/svg/symbols.svg#user" />
                                    {!v.selectedSerchItem}
                                    <button class="slds-button slds-butto--icon slds-float--right slds-pill__remove slds-m-top--xx-small" style="line-height:1.45rem;">
                                        <c:svg class="slds-button__icon" xlinkHref="/resource/SLDS2016/assets/icons/utility-sprite/svg/symbols.svg#close" />
                                    </button>     
                                </a>
                            </li>      
                        </ul>
                    </div>
                    
                </div>
            </div> 
            
            <div class="slds-text-align--center slds-m-top--medium">
                <button class="slds-button slds-button--brand" onclick="{!c.submitRegAction}">Submit</button>
            </div>
            
            
        </div>                
    </div>
    
</aura:component>

<aura:component controller="myLookupController" implements="force:appHostable,flexipage:availableForAllPageTypes,flexipage:availableForRecordHome,force:hasRecordId,forceCommunity:availableForAllPageTypes,force:lightningQuickAction" access="global" >

<aura:attribute name="studentReg" type="Registration__c" default="{'sobjectType':'Registration__c','DateOfRegistration__c':'mm/dd/yyyy'}"/>

<aura:attribute name="studentNameItems" type="Object[]" />

<aura:attribute name="selectedSerchItem" type="string"/>

<aura:attribute name="selectedItemId" type="string"/>

<label class="slds-form-element__label">New Student</label>

<ui:inputText aura:id="newStudentId" placeholder="Search student..." class="slds-input" keyup="{!c.lookupKeySearch}" updateOn="keyup" value="{!v.studentReg.RegNewStudent__c}"/>

<c:svg class="slds-input__icon" xlinkHref="/resource/SLDS2016/assets/icons/utility-sprite/svg/symbols.svg#search"/>

</div>

<aura:iteration items="{!v.studentNameItems}" var="studentVar" indexVar="goNumber">

<li>

<c:svg class="slds-icon slds-icon-standard-contact slds-icon--small slds-m-right--xx-small" xlinkHref="/resource/SLDS2016/assets/icons/utility-sprite/svg/symbols.svg#user" />

<a id="{!studentVar.Id}" role="option"

data-id="{!studentVar.Id}" onclick="{!c.selectSearchItem}">

{!studentVar.Name}

</a>

</span>

</li>

</aura:iteration>

</ul>

</div>

</section>

</div>

<ul>

<c:svg class="slds-icon slds-icon-standard-contact slds-icon--small slds-m-right--xx-small" xlinkHref="/resource/SLDS2016/assets/icons/utility-sprite/svg/symbols.svg#user" />

{!v.selectedSerchItem}

<c:svg class="slds-button__icon" xlinkHref="/resource/SLDS2016/assets/icons/utility-sprite/svg/symbols.svg#close" />

</button>

</a>

</li>

</ul>

</div>

<button class="slds-button slds-button--brand" onclick="{!c.submitRegAction}">Submit</button>

</div>

</aura:component>

Step 2:-

JS Controller [myCustomLookupCmpController.js]

   ({
	lookupKeySearch : function(component, event, helper) {
		var searchStr = event.getSource().get("v.value");  
        //alert('searchStr ' + searchStr);
        var newStudentSpinId = component.find('newStudentSpinId');
        var sldsIsOpenDivId = component.find('sldsIsOpenDivId');
        var newStudentId = component.find('newStudentId');
        var getStudentVal = component.get('v.studentReg.RegNewStudent__c');
        $A.util.addClass(newStudentSpinId, 'spinner');
        $A.util.addClass(sldsIsOpenDivId,'slds-is-open');
        if(!$A.util.isUndefinedOrNull(getStudentVal) && searchStr.length>2){
            var action = component.get('c.regStudenMethd');
            //alert('action ' + action);
            action.setParams({'searchStudent':searchStr});
            action.setCallback(this, function(response){
                var state = response.getState();
                if(state == "SUCCESS"){
                    var result = response.getReturnValue();
                    component.set('v.studentNameItems', result);
                    //alert(JSON.stringify(component.get('v.studentNameItems')));
                     $A.util.removeClass(newStudentSpinId, 'spinner');
                    //alert('datd populated successfully');
                }
            });
            $A.enqueueAction(action);
        }
        
        
	},
    
    selectSearchItem:function(component, event, helper){
        var thisObj = event.currentTarget.innerText;
        var thisId = event.target.id;
      //alert(thisId);
       
        var pillListDivId = component.find('pillListDivId');
        var newStudentSpinId = component.find('newStudentSpinId');
        component.set('v.selectedSerchItem',thisObj); //selectedItemId
        component.set('v.selectedItemId',thisId);
        //alert('select'+component.get('v.selectedItemId'));
       
        $A.util.removeClass(pillListDivId,'slds-hide');
        $A.util.addClass(newStudentSpinId, 'slds-hide');
    },
    
    
    removeSelectedSerchItem:function(component, event, helper){
          
        var sldsIsOpenDivId = component.find('sldsIsOpenDivId');
        var pillListDivId = component.find('pillListDivId');
        var newStudentSpinId = component.find('newStudentSpinId');
        
        $A.util.removeClass(sldsIsOpenDivId,'slds-is-open');
        $A.util.addClass(pillListDivId,'slds-hide');
        $A.util.removeClass(newStudentSpinId, 'slds-hide'); 
        component.set('v.studentReg.RegNewStudent__c','');
       
    },
    
    
    submitRegAction:function(component, event, helper){
      
        var isValid = true;
        var newStudentId = component.find('newStudentId');
        var newStudentIdVal = component.find('newStudentId').get('v.value');
        
        //var searchStr = event.getSource().get("v.value");
        
        
        if($A.util.isUndefinedOrNull(newStudentIdVal) || $A.util.isEmpty(newStudentIdVal)){
            isValid = false;
            newStudentId.set("v.errors",[{message:'Student name is required'}]);
        }else{
            newStudentId.set("v.errors",null);
        }
       
        if(isValid){
        var action = component.get('c.regSaveDataMthd');
        var selectedId = component.get('v.selectedItemId');
       
        //alert('selectedId:: '+selectedId+'  @@@  '+dateval);
            action.setParams({
                'masterId':selectedId                
            });
            action.setCallback(this, function(response){
               
               var state = response.getState();       
                 //alert(state);
                if(state == "SUCCESS"){
                    var result = response.getReturnValue();
                   
                    //alert('Record saved successfully');
                    
                  
                    var sldsIsOpenDivId = component.find('sldsIsOpenDivId');
                    var pillListDivId = component.find('pillListDivId');
                    var newStudentSpinId = component.find('newStudentSpinId');
                    
                    $A.util.removeClass(sldsIsOpenDivId,'slds-is-open');
                    $A.util.addClass(pillListDivId,'slds-hide');
                    $A.util.removeClass(newStudentSpinId, 'slds-hide'); 
                    component.set('v.studentReg.RegNewStudent__c','');                          
                    component.set('v.selectedItemId','');
                    
                    var courseSpinId = component.find('courseSpinId');
                    var courseOpenDivId = component.find('courseOpenDivId');
                    var coursePillListDivId = component.find('coursePillListDivId');
                    component.set('v.studentReg.RegCourse__c', '');
                    $A.util.removeClass(courseSpinId, 'slds-hide');
                    $A.util.removeClass(courseOpenDivId, 'slds-is-open');
                    $A.util.addClass(coursePillListDivId, 'slds-hide');
                  
                    var toastEvent = $A.get("e.force:showToast");
                    toastEvent.setParams({
                        'title':'Success',
                        'type':'Success',
                        'message':'The record has been updated successfully.'
                    });
                    toastEvent.fire();
                    
                }
                
            });
            $A.enqueueAction(action);
        } 
        
    },
    
    
    
})

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({

lookupKeySearch : function(component, event, helper) {

var searchStr = event.getSource().get("v.value");

//alert('searchStr ' + searchStr);

var newStudentSpinId = component.find('newStudentSpinId');

var sldsIsOpenDivId = component.find('sldsIsOpenDivId');

var newStudentId = component.find('newStudentId');

var getStudentVal = component.get('v.studentReg.RegNewStudent__c');

$A.util.addClass(newStudentSpinId, 'spinner');

$A.util.addClass(sldsIsOpenDivId,'slds-is-open');

if(!$A.util.isUndefinedOrNull(getStudentVal) && searchStr.length>2){

var action = component.get('c.regStudenMethd');

//alert('action ' + action);

action.setParams({'searchStudent':searchStr});

action.setCallback(this, function(response){

var state = response.getState();

if(state == "SUCCESS"){

var result = response.getReturnValue();

component.set('v.studentNameItems', result);

//alert(JSON.stringify(component.get('v.studentNameItems')));

$A.util.removeClass(newStudentSpinId, 'spinner');

//alert('datd populated successfully');

}

});

$A.enqueueAction(action);

}

selectSearchItem:function(component, event, helper){

var thisObj = event.currentTarget.innerText;

var thisId = event.target.id;

//alert(thisId);

var pillListDivId = component.find('pillListDivId');

var newStudentSpinId = component.find('newStudentSpinId');

component.set('v.selectedSerchItem',thisObj); //selectedItemId

component.set('v.selectedItemId',thisId);

//alert('select'+component.get('v.selectedItemId'));

$A.util.removeClass(pillListDivId,'slds-hide');

$A.util.addClass(newStudentSpinId, 'slds-hide');

removeSelectedSerchItem:function(component, event, helper){

var sldsIsOpenDivId = component.find('sldsIsOpenDivId');

var pillListDivId = component.find('pillListDivId');

var newStudentSpinId = component.find('newStudentSpinId');

$A.util.removeClass(sldsIsOpenDivId,'slds-is-open');

$A.util.addClass(pillListDivId,'slds-hide');

$A.util.removeClass(newStudentSpinId, 'slds-hide');

component.set('v.studentReg.RegNewStudent__c','');

submitRegAction:function(component, event, helper){

var isValid = true;

var newStudentId = component.find('newStudentId');

var newStudentIdVal = component.find('newStudentId').get('v.value');

//var searchStr = event.getSource().get("v.value");

if($A.util.isUndefinedOrNull(newStudentIdVal) || $A.util.isEmpty(newStudentIdVal)){

isValid = false;

newStudentId.set("v.errors",[{message:'Student name is required'}]);

}else{

newStudentId.set("v.errors",null);

}

if(isValid){

var action = component.get('c.regSaveDataMthd');

var selectedId = component.get('v.selectedItemId');

//alert('selectedId:: '+selectedId+' @@@ '+dateval);

action.setParams({

'masterId':selectedId

});

action.setCallback(this, function(response){

var state = response.getState();

//alert(state);

if(state == "SUCCESS"){

var result = response.getReturnValue();

//alert('Record saved successfully');

var sldsIsOpenDivId = component.find('sldsIsOpenDivId');

var pillListDivId = component.find('pillListDivId');

var newStudentSpinId = component.find('newStudentSpinId');

$A.util.removeClass(sldsIsOpenDivId,'slds-is-open');

$A.util.addClass(pillListDivId,'slds-hide');

$A.util.removeClass(newStudentSpinId, 'slds-hide');

component.set('v.studentReg.RegNewStudent__c','');

component.set('v.selectedItemId','');

var courseSpinId = component.find('courseSpinId');

var courseOpenDivId = component.find('courseOpenDivId');

var coursePillListDivId = component.find('coursePillListDivId');

component.set('v.studentReg.RegCourse__c', '');

$A.util.removeClass(courseSpinId, 'slds-hide');

$A.util.removeClass(courseOpenDivId, 'slds-is-open');

$A.util.addClass(coursePillListDivId, 'slds-hide');

var toastEvent = $A.get("e.force:showToast");

toastEvent.setParams({

'title':'Success',

'type':'Success',

'message':'The record has been updated successfully.'

});

toastEvent.fire();

}

});

$A.enqueueAction(action);

}

})

Step 3:-

Componrnt CSS [myCustomLookupCmp.css]

   .THIS {
}
.THIS .spinnerItem .spinnerIcon{display:none;}
.THIS .spinnerItem.spinner .spinnerIcon{position:absolute; position: absolute; right: 5px; top: 6px; width: 20px; height:20px;  display:block; }
.THIS .spinnerItem.spinner .slds-input__icon{display:none;}

.THIS .spinnerItem.slds-hide + .slds-dropdown-trigger{display:none;}
.THIS .dropdownPosition{position:absolute; left:-90px; top: 55px; right:0;}

.THIS {

}

.THIS .spinnerItem .spinnerIcon{display:none;}

.THIS .spinnerItem.spinner .spinnerIcon{position:absolute; position: absolute; right: 5px; top: 6px; width: 20px; height:20px; display:block; }

.THIS .spinnerItem.spinner .slds-input__icon{display:none;}

.THIS .spinnerItem.slds-hide + .slds-dropdown-trigger{display:none;}

.THIS .dropdownPosition{position:absolute; left:-90px; top: 55px; right:0;}

Step 4:-

Apex Class [myLookupController.apxc]

   public class myLookupController {
   
    @AuraEnabled
    public static List regStudenMethd(string searchStudent){
        searchStudent = '%' + searchStudent + '%';
         List getSrhStudentList = [Select id,Name from NewStudent__c where Name like:searchStudent ];
        return getSrhStudentList;
    } 
    
    @AuraEnabled
    public static void regSaveDataMthd(string masterId){        
        Registration__c regPostData = new Registration__c();
        regPostData.RegNewStudent__c =masterId;        
        insert regPostData;
    }
    
}

public class myLookupController {

@AuraEnabled

public static List regStudenMethd(string searchStudent){

searchStudent = '%' + searchStudent + '%';

List getSrhStudentList = [Select id,Name from NewStudent__c where Name like:searchStudent ];

return getSrhStudentList;

}

@AuraEnabled

public static void regSaveDataMthd(string masterId){

Registration__c regPostData = new Registration__c();

regPostData.RegNewStudent__c =masterId;

insert regPostData;

}

Note:-Static resource zip file

You need to change $Resource.SLDS2016 with your SLDS zip file name (static resource zip file Name)

 <button class="slds-button slds-butto--icon slds-float--right slds-pill__remove slds-m-top--xx-small" style="line-height: 1.45rem;"></button>

1	<button class="slds-button slds-butto--icon slds-float--right slds-pill__remove slds-m-top--xx-small" style="line-height: 1.45rem;"></button>

Related further post that you want to learn

How to create custom lookup on custom object in lightning component

What is lookup relationship in Salesforce?

We used the files in this example:-

Note:- Custom sObject >> NewStudent__c

Lightning Component [myCustomLookupCmp.cmp]

JS Controller [myCustomLookupCmpController.js]

Componrnt CSS [myCustomLookupCmp.css]

Apex Class [myLookupController.apxc]

Note:-Static resource zip file

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