How do I get a list of sObjects and their fields in Apex?

How do I get a list of sObjects and their fields in Apex?

APEX Code. In this code, we have used the schema class to get the list of sObjects and fields in APEX. This list is later displayed with the help of Map and SelectOptions in the next set of code snippet. The schema class has the getGlobalDescribe() method which help us to get the schema of our entire salesforce org.

How do I assign an apex list to another list?

List Methods

1. add(listElement) Adds an element to the end of the list.
2. add(index, listElement) Inserts an element into the list at the specified index position.
3. addAll(fromList)
4. addAll(fromSet)
5. clear()
6. clone()
7. contains(listElement)
8. deepClone(preserveId, preserveReadonlyTimestamps, preserveAutonumber)

How to create list in Apex?

Next, we can add the Apex List important predefined methods like add(ListElement), add(index, ListElement), addAll(fromList), size(), clear(), get(index), isEmpty(), and clone(). The first method is add(ListElement) – using this method, we can insert an element into the list. The code is, Dept.

What is list sObject in salesforce?

Lists of sObjects can be used for bulk processing of data. You can use a list to store sObjects. Lists are useful when working with SOQL queries. SOQL queries return sObject data and this data can be stored in a list of sObjects.

What methods can be used to get a list of all sObject in an organization and their fields?

How to get the list of all SObjects in Apex

• getGlobalDescribe() Returns a map of all sObject names to sObject tokens for all the standard and custom objects defined in your organization.
• getDescribe() Returns the describe sObject result for this field.
• getLabel()
• getName()

How do I assign one list to a list?

When you copying a list to another list using = sign, both the list refer to the same list object in the memory. So modifying one list, other automatically changes as they both refer to same object. To copy a list use slice operator or copy module.

How do you check if something is in a list in Apex?

1 Answer

1. Define a new Set. Set mySet = new Set();
2. Use the Set. addAll() method to add all of the List elements to the set. mySet. addAll(myList); .
3. Use the Set. contains() method to check the Set for the element you’re looking for.

How do I use contains in a list in Apex?

Apex List Contains

1. Prior State. Prior to these two methods, one common way to determine whether a List contained an element was to convert the List to a Set, either by iteration or using the Set(listToCopy) constructor, and then invoking the Set contains method.
2. Primitives.
3. String.
4. SObjects.
5. Custom Types.
6. More.

How do I write a SOQL query in a List?

Basic SOQL Syntax

1. SELECT Name,Phone : This part lists the fields that you would like to retrieve. The fields are specified after the SELECT keyword in a comma-delimited list.
2. FROM Account : This part specifies the standard or custom object that you want to retrieve. In this example, it’s Account.

How do I iterate a List in Salesforce?

You can do two ways to iterate a List in apex. Here is an advance way to loop on a list. List stringList = new List{‘sample1’, ‘sample2’}; for (String str : stringList) system. debug(str);

When to use a map with a list of sobjects?

A map is essential a key/value pair list. Here is the textbook definition: A map is a collection of key-value pairs where each unique key maps to a single value. Keys and values can be any data type—primitive types, collections, sObjects, user-defined types, and built-in Apex types. – Salesforce Developer Documentation

How to iterate over a list of sobjects?

: iterates a list or array of objects (not a map). 1. You are call the Apex from handleLoad method in JS but you are not calling this method from any button in Component. –> So i have used the connectedCallback to load the data on page load.

How to assign a list variable to a sobject?

You can assign a List variable directly to the results of a SOQL query. The SOQL query returns a new list populated with the records returned. Make sure that the declared List variable contains the same sObject that is being queried.

How to bulk process a list of sobjects?

You can bulk-process a list of sObjects by passing a list to the DML operation. This example shows how you can insert a list of accounts. If you perform a bulk insert of Knowledge article versions, make the ownerId of all records the same.