I’m making a booking system where a profile has “availability” which defines the times someone can book them. I’m wanting to use dataloader to load profile(s) and their availability. But their availability is determined by multiple tables which isn’t just a relationship that Dataloader.Ecto source would know about.
To determine availability there’s 3 tables:
# defines their standard recurring availability
schema "standard_time_slots" do
field(:iso_dow, :integer)
field(:start_time, :time)
field(:end_time, :time)
belongs_to :profile, Profile
end
# defines a specific date time to include/block out
schema "specific_time_slots" do
field :start_datetime, :naive_datetime
field :end_datetime, :naive_datetime
field :type, :string
belongs_to :profile, Profile
end
schema "bookings" do
field :start_datetime, :naive_datetime
field :end_datetime, :naive_datetime
belongs_to :profile, Profile
belongs_to :user, User
end
Profile
schema "profiles" do
has_many :standard_time_slots, StandardTimeSlot
has_many :specific_time_slots, SpecificTimeSlot
has_many :bookings, Booking
end
If I wasn’t using absinthe/graphql I could just run a query using the 3 tables to work out the availability (maybe even save it as a db function or view 
) and then just call it when needed in the controller.
With absinthe/graphql I’m not entirely sure how to approach this one and any help would be appreciated
