Chaining Ecto queries using a default query param

better.ex

defmodule UserQueries do
  def in_organization(query \\ User, organization) do
    from u in query,
    where: u.organization_id == ^organization.id
  end
  
  def in_patricks_family(query \\ User) do
    from u in query,
    where: u.last_name == ^"Van Stee"
  end
end

# If we wanted to get users in an organization that are also in Patrick's family,
# we could compose queries on the fly or in a 3rd func like so:
# 
# User
# |> UserQueries.in_organization(organization)
# |> UserQueries.in_patricks_family
# |> Repo.all

worse.ex

defmodule UserQueries do
  def in_organization(organization) do
    from u in User, where: u.organization_id == ^organization.id
    |> Repo.all
  end
  
  def in_patricks_family do
    from u in User, where: u.last_name == ^"Van Stee"
    |> Repo.all
  end
end

# If we wanted to get users in an organization that are also in Patrick's family,
# we'd have to create a new custom query.