unknown type: `:string`

[jaronoff97]

Hello i have a schema that looks like this (condensed):

schema "example" do
...
    field :name, :string
    field :description, :string
    field :mappings, {:map, {:array, :string}}
...
  end

with a migration that looks like this

    alter table(:example) do
      add(:mappings, :"Map(String, Array(String))", codec: "ZSTD(1)", nullable: true)
    end

But when im running my code, i get the following error upon casting:

** (ArgumentError) unknown type: `:string`
...

     stacktrace:
       (ecto_ch 0.8.2) lib/ecto/adapters/clickhouse/schema.ex:329: Ecto.Adapters.ClickHouse.Schema.ch_type_hint/1
       (ecto_ch 0.8.2) lib/ecto/adapters/clickhouse/schema.ex:322: Ecto.Adapters.ClickHouse.Schema.ch_type_hint/1
       (ecto_ch 0.8.2) lib/ecto/adapters/clickhouse/schema.ex:324: Ecto.Adapters.ClickHouse.Schema.ch_type_hint/1
       (ecto_ch 0.8.2) lib/ecto/adapters/clickhouse/schema.ex:300: Ecto.Adapters.ClickHouse.Schema.remap_type/4

which tracks given the type is not found in the ch_type_hint code despite it being in the module suggestions in the comment. Is there a reason for the omission? It's especially odd given the name and description mapping works fine.

[ruslandoga]

👋 @jaronoff97

Does something like this work?

schema "example" do
  field :name, :string
  field :description, :string
  field :mappings, Ch, type: "Map(String, Array(String))"
end

Is there a reason for the omission?

I think "type hints" were there only for some special cases and {:map, {:array, :string}} should've been handled in remap_type/4 so it's a bug in remap_type/4. Thank you for the report!