Mongo.Collection.embeds_one/3 doesn't save type information

[rhcarvalho]

Hi @zookzook, thanks one more time for maintaining this library and merging my contributions!

I'm not sure yet what's the use for the types when defining a module with use Mongo.Collection. Is it just for documentation/humans?

There doesn't seem to be any form of validation, nor does it seem to influence the default encoding/decoding process (and I'm okay with that).

---

Nonetheless, I noticed that calling SomeCollection.__collection__(:types) includes some info about a document attribute set with embeds_many, but missed a similar attribute set with embeds_one.

elixir-mongodb-driver/lib/mongo/collection.ex

Lines 888 to 894 in 6071f18

	@doc """
	Adds the struct to the `embeds_one` list.
	"""
	def __embeds_one__(mod, name, target, opts) do
	Module.put_attribute(mod, :embed_ones, {name, target, add_name(mod, opts, name)})
	end

elixir-mongodb-driver/lib/mongo/collection.ex

Lines 905 to 911 in 6071f18

	@doc """
	Adds the struct to the `embeds_many` list.
	"""
	def __embeds_many__(mod, name, target, type, opts) do
	Module.put_attribute(mod, :types, {name, type})
	Module.put_attribute(mod, :embed_manys, {name, target, add_name(mod, opts, name)})
	end

In embeds_many the type is derived as type = unquote(Macro.escape({{:., [], [mod, :t]}, [], []})). I'm not sure what would be expected for the embeds_one case, any advice?

[zookzook]

The type spec is just for documentation. I need some time to look at it and to remember how it works.