How Junction Objects Work in Salesforce

How Junction Objects Work in Salesforce

Salesforce enforces relationships between different objects to connect these objects under related lists. One relationship type known as the Many-to-Many entails the use of junction objects to link two related objects. This post will define what a junction object is, how it is used, and how to create one in Salesforce.

What is Junction Object?

Junction objects are custom objects that link other objects via many-to-many relationship. For instance, object A and object B needs to establish a relationship. A junction object is needed to link these two objects together.

Junction objects can also link one object to several related object records. The junction object can hold a master-detail relationship that links to the objects it relates.

Situational Example:

Take for instance Opportunity C, Product D, and Product E. Product D and Product E needs to link to Opportunity C.

Opportunity F, a junction object, is then created to link the two Products to Opportunity C.

The junction object Opportunity F now holds records of Opportunity C, Product D, and Product E together.

Hence, Opportunity F (the junction object) holds Product D and E records, while Product D is present in both Opportunity C and F. Records of Product E are likewise present in Opportunity C and F.

The junction object, therefore, links these three records together in a many-to-many relationship type.

How to Create a Custom Junction Object

Users must first create a custom object that’ll act as the junction object. Here’s how to do it:

  • Locate the Quick Find Box under Setup and type Objects.
  • Select Objects, then click on New Custom Object. A Custom Object Wizard will appear.
  • Simply follow the steps within the wizard to create the fields under the new custom object.
  • Add an object name that specifies its particular purpose.
  • No need to utilize the custom tab wizard; a junction object stands well alone without a tab.
  • Once done, hit Save.

When the junction object’s already up, linking related existing objects can now be done. To do this, create master-detail relationship fields on the junction object via the custom field wizard. Separate master-detail relationship fields must be created for every object that needs to be linked under one junction object.

Leave a Reply

Close Menu