hassanRsiddiqi
/ stream_csv.ex
Created
November 1, 2020 09:18
— forked from avdgaag/stream_csv.ex
Streaming CSV straight out of the database to the client using Elixir, Phoenix, Ecto and PostgreSQL.
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| def index(conn, _params) do | |
| conn = conn | |
| |> put_resp_content_type("text/csv") | |
| |> put_resp_header("content-disposition", "attachment; filename=export.csv") | |
| |> send_cunked(200) | |
| Repo.transaction fn -> | |
| Ecto.Adapters.SQL.stream(Repo, "COPY expensive_report TO STDOUT CSV HEADER") | |
| |> Stream.map(&(chunk(conn, &1.rows))) | |
| |> Stream.run |