Mongo.Repo.fetch_by
You're seeing just the callback
fetch_by
, go back to Mongo.Repo module for more information.
Specs
fetch_by(module :: module(), query :: BSON.document(), opts :: Keyword.t()) :: {:ok, Mongo.Collection.t()} | {:error, :not_found} | {:error, any()}
Returns a single document struct for the collection defined in the given module and query as
a tuple of {:ok, document}
.
Returns {:error, :not_found}
if no result was found.
If multiple documents satisfy the query, this method returns the first document according to the natural order which reflects the order of documents on the disk.
For all options see Options
Example
MyApp.Repo.fetch_by(Post, %{title: title})
MyApp.Repo.fetch_by(Post, %{title: title}, read_concern: %{level: "local"})