Hi! I’m super new to ecto and struggling with writing queries without using the postgreSQL views that I learned in college.

So what I’m wondering is:

Given the following schemas:

schema "s1" do
field :f1, :dtype1
field :f2, :dtype2

belongs_to :b1, B1
belongs_to :b2, B2
belongs_to :b3, B3
end

schema "s2" do
field :f3, :dtype2

belongs_to :b1, B1
belongs_to :b2, B2
belongs_to :b3, B3
belongs_to :b4, B4
end

how do I join s1 with s2 on b1, b2, and b3 without doing a million joins and associations?

In the end I actually want to update every instance of s1.f2 to be equal to the corresponding s2.b4.

THANKS!!!