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Description
Driver version: 1.5.4
Dialyzer reports a warning because the field value inside type definition Mongo.FindAndModifyResult can actually take the value of nil but its type spec is BSON.document() for which nil is not a documented value.
lib/mongo/results.ex:
@moduledoc """ The successful result struct of `Mongo.find_one_and_*` functions, which under the hood use Mongo's `findAndModify` API. See <https://docs.mongodb.com/manual/reference/command/findAndModify/> for more information. """ @type t :: %__MODULE__{ value: BSON.document(), matched_count: non_neg_integer(), upserted_id: String.t(), updated_existing: boolean() } defstruct [ :value, :matched_count, :upserted_id, :updated_existing ] end lib/bson.ex:
@type document :: %{atom => BSON.t()} | %{String.t() => BSON.t()} | [{atom, BSON.t()}] | [{String.t(), BSON.t()}] Metadata
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