Changelog

All notable changes to this project will be documented in this file.

The format is based on Keep a Changelog and this project adheres to Semantic Versioning.

[Unreleased]

Downgrade poison to v3.1.0.
Test against Dgraph v1.0.13
Set the GRPC deadline and DBConnection checkout timeout to use :timeout (contribution by @emhagman).
Update dependency uuid to elixir_uuid (contribution by @emhagman)
Some smaller tweaks (contribution by @optikfluffel).
Update the docs.

Don't use module attribute for configuration values since they are set on compilation time. This prevented the enforce_struct_schema feature to work properly.

New function set_struct/2. This function allow you to convert an struct type into a mutation (json based) type in dgraph. It also allows you to enforce the schema in database (adding a "class name" info before every predicate, this class name is the single name given to the elixir module struct) by activating the enforce_struct_schema in the config files. The function sends the mutation to the server and returns {:ok, result} or {:error, error} otherwise. Internally it uses Dgraphs set_json. Thanks to @WolfDan.
New config option keepalive. It defines the time in ms between pings to the server. Default value is :infinity which disables pings completely. Dgraph drops the connection on pings at the moment so it is disabled for now. Internally this uses :adapter_opts of grpc-elixir which in turn sets http2_opts of gun.
I added a changelog.

The keepalive option fixes the gun_down error for now. The connection was dropped by Dgraph when the server was pinged. The server sent a {goaway,0,enhance_your_calm,<<"too_many_pings">>} message. For now pings are disabled. This is not ideal since this way ExDgraph cannot check if the connection is still alive. But I have to wait for Dgraph to get back to me on this issue. You find the issue here: dgraph-io/dgraph#2444
Removed some warnings and refactored a couple of things.