The Method model is a container of conditions (triggers) and actions.

• A Method has multiple Condition
• Each Condition has multiple Action

We can have different types of Condition, for instance:

• Order amount between 0 and 500 USD
• Order weight between 10 and 100 pounds

And we can have different types of Action, for instance:

• Call supervisor ID 5
• Send email to [email protected]

We are creating a table for each type of condition and a table for each type of action. That way we don't end up with a table full of columns to encompass each possible scenario.

The problem is: how to create this Polymorphic Relationship?

Starting with Conditions…

My database looks like: