How to display upload Image if a record existing an attachment in lightning component?

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Hey guys, In this post we are going to learn about how to Display an Upload Icon on the lightning component if a object record has files or any kind of attachment..

Requirement:- If upload a custom file on lightning component such like (jpg’, ‘jpeg’,’pdf’, ‘doc’) etc.. then against of every record display should be an attachment Image on right side of table.

Upload Files in Lightning Component Click Here For More Information

Files we used in this post example:-

fileAttachmentCmp.cmp	Lightning Component	It is used for display the name, address, email, and upload file button on the table.
fileAttachmentCmpConroller.js	JavaScript Controller File	It is used for communicate to server side apex method and fetch the record using init fuction.
fileAttachmentCmpHelper.js	JavaScript Helper File	It is used for refresh the page after delete the record.
wrapperCustomObjCtrCmp.apxc	Apex Class Controller	It is used for save the upload images on sObject database.
Custom Object:- NewStudent__c Custom Object Fields:- Name, Email__c Address__c	Custom Object and their fields	Display an upload Image on right side of table in the lightning component if a record has an attachment.

Final Output

Other related post that would you like to learn in lightning component.

Step 1:- Create Lightning Component : fileAttachmentCmp.cmp

From Developer Console >> File >> New >> Lightning Component

fileAttachmentCmp.cmp [Lightning Component File]

   <aura:component controller="wrapperCustomObjCtrCmp" implements="force:appHostable,flexipage:availableForAllPageTypes,flexipage:availableForRecordHome,force:hasRecordId,forceCommunity:availableForAllPageTypes,force:lightningQuickAction,lightning:isUrlAddressable" access="global" >
    
    <aura:attribute name="wrapListItems" type="NewStudent__c[]"/>
    <aura:handler name="init" value="{!this}" action="{!c.doInit}"/>
    <aura:attribute name="recSelectId" type="String" default=""/>
   
    
    <aura:attribute name="accept" type="List" default="['.jpg', '.jpeg','.pdf']"/>
    <aura:attribute name="multiple" type="Boolean" default="true"/>
    <aura:attribute name="disabled" type="Boolean" default="false"/>
   
    
    <div class="slds slds-p-horizontal--medium">
        <table class="slds-table slds-table--bordered slds-table--col-bordered" style="border-collapse:collapse;">
            <thead> 
                <tr>
                    <th>Record Id</th>
                    <th>Student Name</th>
                    <th>Address</th>
                    <th>Email</th>
                     <th>Upload File</th>
                    <th></th>
                </tr>
            </thead>
            <tbody>
                <aura:iteration items="{!v.wrapListItems}" var="wrapVar" indexVar="index">
                    <tr id="{!wrapVar.recStudentId}">
                        <td>{!wrapVar.recStudentId}</td>
                        <td>{!wrapVar.studentName}</td>
                        <td>{!wrapVar.studentAddress}</td>
                        <td>{!wrapVar.studentEmail}</td>
                        <td>
                            <lightning:fileUpload
                              multiple="{!v.multiple}" 
                              accept="{!v.accept}"
                              recordId="{!wrapVar.recStudentId}" 
                              onuploadfinished="{!c.uploadFileAction}" disabled="{!v.disabled}"/>
                        </td>
                        <td>
                            <aura:if isTrue="{!wrapVar.checkAttachFile}"> 
                                <lightning:buttonIcon  tabindex="{!wrapVar.recStudentId}" iconName="utility:upload" name="{!wrapVar.recStudentId}" variant="bare" onclick="{!c.navigateAttachFile}"/>
                            </aura:if>
                        </td>
                    </tr>
                </aura:iteration>
            </tbody>
        </table>
    </div>
    
</aura:component>

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

<aura:attribute name="wrapListItems" type="NewStudent__c[]"/>

<aura:handler name="init" value="{!this}" action="{!c.doInit}"/>

<aura:attribute name="recSelectId" type="String" default=""/>

<aura:attribute name="accept" type="List" default="['.jpg', '.jpeg','.pdf']"/>

<aura:attribute name="multiple" type="Boolean" default="true"/>

<aura:attribute name="disabled" type="Boolean" default="false"/>

<thead>

<tr>

<th>Record Id</th>

<th>Student Name</th>

<th>Address</th>

<th>Email</th>

<th>Upload File</th>

</tr>

</thead>

<tbody>

<aura:iteration items="{!v.wrapListItems}" var="wrapVar" indexVar="index">

<td>{!wrapVar.recStudentId}</td>

<td>{!wrapVar.studentName}</td>

<td>{!wrapVar.studentAddress}</td>

<td>{!wrapVar.studentEmail}</td>

<td>

<lightning:fileUpload

multiple="{!v.multiple}"

accept="{!v.accept}"

recordId="{!wrapVar.recStudentId}"

onuploadfinished="{!c.uploadFileAction}" disabled="{!v.disabled}"/>

</td>

<td>

<aura:if isTrue="{!wrapVar.checkAttachFile}">

<lightning:buttonIcon tabindex="{!wrapVar.recStudentId}" iconName="utility:upload" name="{!wrapVar.recStudentId}" variant="bare" onclick="{!c.navigateAttachFile}"/>

</aura:if>

</td>

</tr>

</aura:iteration>

</tbody>

</table>

</div>

</aura:component>

Step 2:- Create Lightning Component : fileAttachmentCmpConroller.js

From Developer Console >> File >> New >> Lightning Component >> JavaScript Controller

fileAttachmentCmpConroller.js [JavaScript Controller]

   ({
	doInit : function(component, event, helper) {    
        
	  var action = component.get("c.appCustomWrapListMthd"); 
        
        action.setCallback(this, function(response){
            var state = response.getState();            
            if(state=='SUCCESS'){
                var result = response.getReturnValue();            
                component.set('v.wrapListItems',result);
            }
        });
        $A.enqueueAction(action);        
	},
    
    
    uploadFileAction : function(component, event, helper) {
        var uploadedFiles = event.getParam("files");
        var documentId = uploadedFiles[0].documentId;
        var fileName = uploadedFiles[0].name;
        var toastEvent = $A.get("e.force:showToast");
        toastEvent.setParams({
            "title": "Success!",   
            "type": "success",
            "message": "File "+fileName+" Uploaded successfully."
        });
        toastEvent.fire();
        $A.get('e.force:refreshView').fire();        
    },
    
    
})

({

doInit : function(component, event, helper) {

var action = component.get("c.appCustomWrapListMthd");

action.setCallback(this, function(response){

var state = response.getState();

if(state=='SUCCESS'){

var result = response.getReturnValue();

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

}

});

$A.enqueueAction(action);

uploadFileAction : function(component, event, helper) {

var uploadedFiles = event.getParam("files");

var documentId = uploadedFiles[0].documentId;

var fileName = uploadedFiles[0].name;

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

toastEvent.setParams({

"title": "Success!",

"type": "success",

"message": "File "+fileName+" Uploaded successfully."

});

toastEvent.fire();

$A.get('e.force:refreshView').fire();

})

Step 3:- Create Lightning Component : fileAttachmentCmpHelper.js

From Developer Console >> File >> New >> Lightning Component >> JavaScript Helper

fileAttachmentCmpHelper.js [JavaScript Helper File]

   ({
	refreshView : function(component, event, helper) {
		var action = component.get("c.appCustomWrapListMthd"); 
        
        action.setCallback(this, function(response){
            var state = response.getState();
            //alert(state);
            if(state=='SUCCESS'){
                var result = response.getReturnValue();
               // alert('result ' + JSON.stringify(result));
                component.set('v.wrapListItems',result);
            }
        });
        $A.enqueueAction(action);
	}
})

({

refreshView : function(component, event, helper) {

var action = component.get("c.appCustomWrapListMthd");

action.setCallback(this, function(response){

var state = response.getState();

//alert(state);

if(state=='SUCCESS'){

var result = response.getReturnValue();

// alert('result ' + JSON.stringify(result));

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

}

});

$A.enqueueAction(action);

}

})

Step 4:- Create Lightning Application : wrapperCustomObjCtrCmp.apxc

From Developer Console >> File >> New >> Apex Class

wrapperCustomObjCtrCmp.apxc [Apex Class Controller]

   public class wrapperCustomObjCtrCmp {    
   
    public class wrapperCustomClass{
        @AuraEnabled
        public string studentName;
        @AuraEnabled
        public string studentEmail;
        @AuraEnabled
        public string studentAddress;
        @AuraEnabled
        public Id recStudentId;
        @AuraEnabled
        public boolean checkAttachFile= false;
        
        public wrapperCustomClass(string studentName, string studentEmail, string studentAddress, Id recStudentId,boolean checkAttachFile){
         this.studentName = studentName;
         this.studentEmail = studentEmail;
         this.studentAddress = studentAddress;  
         this.recStudentId = recStudentId;  
         this.checkAttachFile=checkAttachFile;
        }
    }
    
    
    @AuraEnabled
    public static List<wrapperCustomClass> appCustomWrapListMthd(){
       List<NewStudent__c> newStudent = new List<NewStudent__c>();       
       List<wrapperCustomClass> custWrapObj = new  List<wrapperCustomClass>();
       List<NewStudent__c> newStudentView =[Select Id, Name, Email__c, Address__c From NewStudent__c];
        
        Map<Id,contentdocumentlink> projCheckIdDocMap = new Map<Id,contentdocumentlink> ();
        Set<Id> projChecklistIdSet= new Set<Id> ();
        for(NewStudent__c de: newStudentView) {
            projChecklistIdSet.add(de.Id);
        }
        List<Contentdocumentlink> listDocs = [select Id,LinkedEntityId from contentdocumentlink where LinkedEntityId IN :projChecklistIdSet
                                              ];
        for(Contentdocumentlink doc: listDocs) {
          projCheckIdDocMap.put(doc.LinkedEntityId, doc); 
        }     
        
        boolean hasAttch= false;
        for(NewStudent__c studentObj:newStudentView){
        
            if(projCheckIdDocMap.get(studentObj.Id)!=null){
                hasAttch=true;
                system.debug('hasAttch###' + hasAttch);
                
            }else{
                 hasAttch=false;
            }            
         custWrapObj.add(new wrapperCustomClass(studentObj.Name,studentObj.Email__c, studentObj.Address__c,studentObj.Id, hasAttch));                       
        }
        return custWrapObj;     
    }
 }

public class wrapperCustomObjCtrCmp {

public class wrapperCustomClass{

@AuraEnabled

public string studentName;

@AuraEnabled

public string studentEmail;

@AuraEnabled

public string studentAddress;

@AuraEnabled

public Id recStudentId;

@AuraEnabled

public boolean checkAttachFile= false;

public wrapperCustomClass(string studentName, string studentEmail, string studentAddress, Id recStudentId,boolean checkAttachFile){

this.studentName = studentName;

this.studentEmail = studentEmail;

this.studentAddress = studentAddress;

this.recStudentId = recStudentId;

this.checkAttachFile=checkAttachFile;

}

@AuraEnabled

public static List<wrapperCustomClass> appCustomWrapListMthd(){

List<NewStudent__c> newStudent = new List<NewStudent__c>();

List<wrapperCustomClass> custWrapObj = new List<wrapperCustomClass>();

List<NewStudent__c> newStudentView =[Select Id, Name, Email__c, Address__c From NewStudent__c];

Map<Id,contentdocumentlink> projCheckIdDocMap = new Map<Id,contentdocumentlink> ();

Set<Id> projChecklistIdSet= new Set<Id> ();

for(NewStudent__c de: newStudentView) {

projChecklistIdSet.add(de.Id);

}

List<Contentdocumentlink> listDocs = [select Id,LinkedEntityId from contentdocumentlink where LinkedEntityId IN :projChecklistIdSet

];

for(Contentdocumentlink doc: listDocs) {

projCheckIdDocMap.put(doc.LinkedEntityId, doc);

}

boolean hasAttch= false;

for(NewStudent__c studentObj:newStudentView){

if(projCheckIdDocMap.get(studentObj.Id)!=null){

hasAttch=true;

system.debug('hasAttch###' + hasAttch);

}else{

hasAttch=false;

}

custWrapObj.add(new wrapperCustomClass(studentObj.Name,studentObj.Email__c, studentObj.Address__c,studentObj.Id, hasAttch));

}

return custWrapObj;

}

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How to display upload Image if a record existing an attachment in lightning component?

Files we used in this post example:-

fileAttachmentCmp.cmp [Lightning Component File]

fileAttachmentCmpConroller.js [JavaScript Controller]

fileAttachmentCmpHelper.js [JavaScript Helper File]

wrapperCustomObjCtrCmp.apxc [Apex Class Controller]

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