List of all Salesforce Objects & Fields – Schema Class

/* Code by SHUBHAM BHARDWAJ
* Creation date 19/09/2020
* Apex Controller
*/

public class fetchData {

@AuraEnabled//Method to get the List of All Objects
public static Map<String, String> getAllObject(){

Map<String,String> returnObjectMap = new Map<String,String>();

//Schema.getGlobalDescribe() => return a Map of type Map<String, Schema.SObjectType>
Map<String, Schema.SObjectType> objectMap = Schema.getGlobalDescribe();

//get List of all sObject
List<Schema.SObjectType> objectMapValues = objectMap.Values();
System.debug('All Objects '+ objectMapValues);

//prepare a Map to send Data from Server to Client Side

for(Schema.SObjectType objType : objectMapValues){
String key = objType.getDescribe().getName();
String value = objType.getDescribe().getLabel();
returnObjectMap.put(key,value);
}
System.debug(returnObjectMap);
if(returnObjectMap != null && returnObjectMap.size() > 0){
return returnObjectMap;
}else{
return null;
}
}

@AuraEnabled //Method to get all the fields of a particular Object
public static List<String> getAllfields(String objectName){
List<String> allFields = new List<String>();

Map<String, Schema.SObjectType> objectMap = Schema.getGlobalDescribe();
SObjectType objType = objectMap.get(objectName);

// Map of fields with api name and Api name as value
Map<String,Schema.SObjectField> objTypeFields = objType.getDescribe().fields.getMap();
if(!objTypeFields.isEmpty()){
for (String fieldName: objTypeFields.keySet()) {
//getting labels of the fields
String fieldLabel = objTypeFields.get(fieldName).getDescribe().getLabel();
allFields.add(fieldLabel);
}
}
System.debug(allFields);
return allFields;
}
}

<!--
* Code by SHUBHAM BHARDWAJ
* Creation date 19/09/2020
* Component
-->

<aura:component controller="fetchData">

<!-- ATTRIBUTES -->
<aura:attribute name="allObject" type="List" access="PRIVATE"/>
<aura:attribute name="allField" type="List" access="PRIVATE"/>
<aura:attribute name="selectedObject" type="String" access="PRIVATE"/>
<aura:attribute name="selectedField" type="String" access="PRIVATE"/>

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

<div class="modal-header slds-modal__header slds-size_1-of-1">
<h4 class="title slds-text-heading--medium">All Object & Respective Fields</h4>
</div>
<!--End Modal Header-->

<!--Modal Body-->
<div class="slds-modal__content slds-p-around--x-small slds-align_absolute-center slds-size_1-of-1 slds-is-relative">
<form class="slds-form--stacked">
Select any Object and get All the Fields...
</form>
</div>
<div class="slds-grid slds-gutters slds-p-around_medium">
<div class="slds-col slds-size_1-of-2">
<span><lightning:select name="objects" label="Select a Object" aura:id="objectId" value="{!v.selectedObject}" onchange="{!c.handleChange}">
<option value="">choose one...</option>
<aura:iteration items="{!v.allObject}" var="object">
<option text="{!object.value}" value="{!object.key}" selected="{!object.selected}"/>
</aura:iteration>
</lightning:select>
</span>
</div>
<aura:if isTrue="{!v.selectedObject}">
<div class="slds-col slds-size_1-of-2">
<span><lightning:select name="allField" label="Here are the Fields" aura:id="fieldId" value="{!v.selectedField}">
<aura:iteration items="{!v.allField}" var="field">
<option text="{!field}" value="{!field}" selected="{!field.selected}"/>
</aura:iteration>
</lightning:select>
</span>
</div>
</aura:if>
</div>
</aura:component>

/* Code by SHUBHAM BHARDWAJ
* Creation date 19/09/2020
* JS Controller
*/
({
init : function(component, event, helper) {
helper.getData(component, event, helper);
},
handleChange : function(component, event, helper){
helper.getAllFields(component, event, helper);
}
})

/* Code by SHUBHAM BHARDWAJ
* Creation date 19/09/2020
* JS Helper
*/
({
getData : function(component, event, helper) {
var action = component.get("c.getAllObject");
action.setCallback(this, function(response) {
var state = response.getState();
if (state === "SUCCESS" || state === "DRAFT") {
var result = response.getReturnValue();
var listofObjects = [];
for(var key in result){
listofObjects.push({key: key, value: result[key]});
}
component.set("v.allObject", listofObjects);
}else if (status === "INCOMPLETE") {
console.log("No response from server or client is offline.");
}else if (status === "ERROR") {
if (errors) {
if (errors[0] && errors[0].message) {
console.log("Error message: " + errors[0].message);
}
} else {
console.log("Unknown error");
}
}
});
$A.enqueueAction(action);
},
getAllFields : function(component, event, helper){
var action = component.get("c.getAllfields");
console.log(component.get('v.selectedObject'));
action.setParams({
objectName : component.get('v.selectedObject'),
})
action.setCallback(this, function(response) {
var state = response.getState();
if (state === "SUCCESS" || state === "DRAFT") {
var result = response.getReturnValue();
component.set("v.allField", result);
}else if (status === "INCOMPLETE") {
console.log("No response from server or client is offline.");
}else if (status === "ERROR") {
if (errors) {
if (errors[0] && errors[0].message) {
console.log("Error message: " + errors[0].message);
}
} else {
console.log("Unknown error");
}
}
});
$A.enqueueAction(action);
}
})