Mahmoud Zalt has a recent post to his Medium.com site that shares a cheat sheet for Eloquent relationships you can use with the Eloquent database layer in a Laravel application.

He goes through each of the relationship types and provides both a diagram showing the relationship and some sample code to make it work:

• One to One
• One to Many
• Polymorphic One to Many Relationship
• Many to Many Relationship
• Polymorphic Many to Many Relationship

The post ends with a combined table of all of the relationships, how they connect with the other models, the number of tables involved and how to set values to a related model.