What is the junction object and what purpose does it serve?
Junction objects are used for creating many-to-many relationships in Salesforce. Salesforce by default supports one-to-many relationships. These are the Master-Detail, the Lookup and the External Lookup relationships. They are defined from the many-to one side, meaning from a child to a parent.
What is junction Salesforce?
In Salesforce, a Junction Object is a custom object with two master-detail relationships to two different record types. It is used to represent a many-to-many relationship in which several junction objects can link one instance of a record to many children, and each child can equally be linked to many parents.
What happens when you delete a junction object?
The second master-detail relationship you create on your junction object becomes the secondary relationship. If you delete the primary master-detail relationship or convert it to a lookup relationship, the secondary master object becomes primary. Select a Sharing Setting option.
What is the use of junction object in Salesforce?
To create this data model you need a third object “Job Application” that links the 2. So you’d create a lookup field for both Position and Candidate object on the “Job Application” object. This will establish many to many relationship between Position and Candidate via the “Job Application” object known as the junction object.
How are junction objects used to create relationships?
They can be made one-to-one relationship by adding validation rules, or maybe triggers to enforce the one-to-one nature, i.e. only one child is allowed. Junction objects are used to create many to many relationships between objects.
How is a custom junction object used in Java?
Using a custom junction object, you can model a “many-to-many” relationship between two objects. For example, you may have a custom object called “Bug” that relates to the standard case object such that a bug could be related to multiple cases and a case could also be related to multiple bugs. Creating the junction object.