I have the following aggregates and relationships in my resource:
aggregates do
count :total_students, :students
count :total_classes, :classes
end
relationships do
alias Core.Feedbacks
has_many :classes, Feedbacks.Class
has_many :students, Feedbacks.Student
end
When I try to load total_students it works just fine. But when I try to load total_classes I get the following error:
iex(18)> Core.Feedbacks.read!(Core.Feedbacks.School) |> List.first |> Core.Feedbacks.load([:total_classes])
[debug] QUERY OK source="schools" db=0.3ms idle=795.8ms
SELECT s0."id", s0."name", s0."inserted_at", s0."updated_at", s0."organization_id" FROM "schools" AS s0 []
{:error,
%Ash.Error.Unknown{
errors: [
%Ash.Error.Unknown.UnknownError{
error: "Cannot load in an aggregate.",
field: nil,
changeset: nil,
query: nil,
error_context: ["Loading aggregate: :total_classes for query: #Ash.Query<resource: Core.Feedbacks.School>"],
vars: [],
path: [:aggregates],
stacktrace: #Stacktrace<>,
class: :unknown
}
],
stacktraces?: true,
changeset: nil,
query: nil,
error_context: [],
vars: [],
path: [],
stacktrace: #Stacktrace<>,
class: :unknown
}}
In my Class resource, I have the following preparations:
preparations do
prepare build(load: [:students])
end
If I remove this, then the aggregation works fine.
