GeoJSON default SRID not set

[gworkman]

It seems that the SRID of a geometry parsed from geojson is not set to the default of 4326, as defined by the spec. I've run into this issue because I am parsing a geojson object and performing a query with it using the great geo_postgis lib. However, when the database's column SRID is 4326, I get an error that it cannot compare the two geometries because the SRIDs are different (the parsed geojson geometry has an SRID of 0).

As a temporary solution, I changed the SRID of the column to 0 in the database, which is clearly not ideal.

I'm more than happy to write up a merge request for this issue, if this should be the desired behavior. Just point me in the right direction!

EDIT: add versions

➜ elixir --version
Erlang/OTP 22 [erts-10.7.1] [source] [64-bit] [smp:4:4] [ds:4:4:10] [async-threads:1] [hipe] [dtrace]

Elixir 1.10.2 (compiled with Erlang/OTP 22)

  defp deps do
    [
      {:ecto_sql, "~> 3.1"},
      {:postgrex, ">= 0.0.0"},
      {:jason, "~> 1.0"},
      ...
      {:geo_postgis, "~>3.3.0"}
    ]
  end

[bitboxer]

I solved this by setting the srid manually after decoding:

Map.put(Geo.JSON.decode!(item, :srid, 4326)