Force.com Platform Fundamentals

Preface
Introducing the Force.com Platform
About the Sample Recruiting App
Reviewing Database Concepts
Building a Simple App
Enhancing the Simple App with Advanced Fields, Data Validation, and Page Layouts
Expanding the Simple App Using Relationships
Introducing Relationships
Introducing Relationship Custom Fields
Adding Candidates to the Mix
Bringing Candidates and Positions Together with Job Applications
Introducing Search Layouts
Managing Review Assessments
Creating a Many-to-Many Relationship
Try It Out: Create the Employment Website Object
Try It Out: Add the URL Field to the Employment Website Object
Try It Out: Create the Job Posting Object
Try It Out: Add Fields to the Job Posting Object
Customizing Related Lists in a Many-to-Many Relationship
Try It Out: Customize the Positions and Employment Websites Related Lists
Try It Out: Customize Record Highlights for Employment Websites and Job Postings
Look at What We've Done
Putting it All Together
Securing and Sharing Data
Collaborating with Chatter
Automating Business Processes
Analyzing Data with Reports and Dashboards
Moving Beyond Point-and-Click App Development
Learning More
Glossary
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Customizing Related Lists in a Many-to-Many Relationship

The capability to customize related lists in a many-to-many relationship is more robust than the capability to customize related lists in a lookup relationship. When you have a lookup relationship between two objects (like the one we created between the Job Application and Candidate objects), the related list on one object can only display fields from the object to which it is directly related; it cannot span to other objects the way formulas can. For example, the Job Applications related list on a candidate record can display any job application field, but it can't display any fields from the Position object, even though the Job Application object has lookup relationships with both the Candidate and Position objects.

Fortunately for us, many-to-many relationships allow for greater flexibility. When working with a many-to-many relationship, the junction object's related list on one master object can display the other master object's fields. We're going to take advantage of this by configuring the Positions related list on each employment website record to display fields from the Position object and vice versa, thus allowing these two objects to span to each other. It's all coming together now!