Hi everyone
I’ve updated to Ash version 3.24.3 from 3.9.0, and since the update one part of the code no longer works. Basically the situation is like this, there is a main Resource `resource`, another resource `family`, and they are joined using a join table `family_membership`. So they look roughly like this:
defmodule MyApp.FamilyMembership do
use Ash.Resource,
domain: MyApp.Domain,
data_layer: AshPostgres.DataLayer
postgres do
table "family_memberships"
repo MyApp.Repo
end
attributes do
uuid_primary_key :id
end
relationships do
belongs_to :resource, MyApp.MyResource, primary_key?: true, allow_nil?: false
belongs_to :family, MyApp.Family, primary_key?: true, allow_nil?: false
end
end
and both resource have the many_to_many relationship defined, like this for the `resource`:
relationships do
many_to_many :families, MyApp.Family do
through MyApp.FamilyMembership
source_attribute_on_join_resource :resource_id
destination_attribute_on_join_resource :family_id
end
end
and like this for the `family`:
relationships do
many_to_many :resources, MyApp.MyResource do
through MyApp.FamilyMembership
source_attribute_on_join_resource :family_id
destination_attribute_on_join_resource :resource_id
end
end
All three modules are registered in the Domain.
Now when I try to run a query like this:
MyApp.Resource |> Ash.Query.filter(exists(families, id == 8)) |> Ash.read!()
I always get this error, and have no clue how to fix that:
** (Ash.Error.Unknown)
Bread Crumbs:
> Exception raised in: Prices.Data.Part.for_load
Unknown Error
* ** (ArgumentError) `nil` is not a Spark DSL module.
nil.fetch_opt([:multitenancy], :strategy)
(spark 2.6.1) lib/spark/dsl/extension.ex:2162: Spark.Dsl.Extension.get_config_entry_with_fallback/6
(spark 2.6.1) lib/spark/dsl/extension.ex:307: Spark.Dsl.Extension.get_opt/5
(ash_sql 0.3.11) lib/join.ex:604: AshSql.Join.join_prefix/3
(ash_sql 0.3.11) lib/join.ex:600: AshSql.Join.set_join_prefix/3
(ash_sql 0.3.11) lib/join.ex:494: AshSql.Join.related_query/3
(ash_sql 0.3.11) lib/join.ex:348: AshSql.Join.related_subquery/3
(ash_sql 0.3.11) lib/join.ex:909: AshSql.Join.join_relationship/8
(ash_sql 0.3.11) lib/join.ex:161: anonymous fn/10 in AshSql.Join.join_all_relationships/10
(elixir 1.18.4) lib/enum.ex:4968: Enumerable.List.reduce/3
(elixir 1.18.4) lib/enum.ex:2600: Enum.reduce_while/3
(ash_postgres 2.6.25) lib/data_layer.ex:3507: AshPostgres.DataLayer.filter/4
(ash 3.24.3) lib/ash/actions/read/read.ex:88: Ash.Actions.Read.run/3
nil.fetch_opt([:multitenancy], :strategy)
(spark 2.6.1) lib/spark/dsl/extension.ex:2162: Spark.Dsl.Extension.get_config_entry_with_fallback/6
(spark 2.6.1) lib/spark/dsl/extension.ex:307: Spark.Dsl.Extension.get_opt/5
(ash_sql 0.3.11) lib/join.ex:604: AshSql.Join.join_prefix/3
(ash_sql 0.3.11) lib/join.ex:600: AshSql.Join.set_join_prefix/3
(ash_sql 0.3.11) lib/join.ex:494: AshSql.Join.related_query/3
(ash_sql 0.3.11) lib/join.ex:348: AshSql.Join.related_subquery/3
(ash_sql 0.3.11) lib/join.ex:909: AshSql.Join.join_relationship/8
(ash_sql 0.3.11) lib/join.ex:161: anonymous fn/10 in AshSql.Join.join_all_relationships/10
(elixir 1.18.4) lib/enum.ex:4968: Enumerable.List.reduce/3
(elixir 1.18.4) lib/enum.ex:2600: Enum.reduce_while/3
(ash_postgres 2.6.25) lib/data_layer.ex:3507: AshPostgres.DataLayer.filter/4
(ash 3.24.3) lib/ash/behaviour_helpers.ex:62: Ash.BehaviourHelpers.call_and_validate_return/5
(ash 3.24.3) lib/ash/query/query.ex:4769: Ash.Query.maybe_filter/3
(ash 3.24.3) lib/ash/query/query.ex:4520: Ash.Query.data_layer_query/2
(ash 3.24.3) lib/ash/actions/read/read.ex:801: anonymous fn/9 in Ash.Actions.Read.do_read/5
(ash 3.24.3) lib/ash/actions/read/read.ex:1601: Ash.Actions.Read.maybe_in_transaction/3
(ash 3.24.3) lib/ash/actions/read/read.ex:435: Ash.Actions.Read.do_run/3
(ash 3.24.3) lib/ash/actions/read/read.ex:89: anonymous fn/3 in Ash.Actions.Read.run/3
iex:22: (file)
To me it looks like I need to preload the `:families`, but adding a `Ash.Query.load(:families)` does not help at all. Also this was working fine before the upgrade.
Any help on how to fix this is appreciated 
