Has many through many-to-many

I have the following table layout:

deals:
- id
- price

products:
- id
- name

deal_product:
- id
- deal_id
- product_id

metrics:
- id
- name

metric_product:
- id
- metric_id
- product_id
- value

products and metrics have a many-to-many relationship with a pivot column of value.

deals and products also have a many-to-many relationship.

I can get metrics for a product with $product->metrics, but I want to be able to get all metrics for all products related to a deal, so I could do something like this: $deal->metrics.

It needs to be in relationship format, because they need to be eager loaded for my use case.

Thanks for your help!

via Chebli Mohamed