Created
July 27, 2020 21:27
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Write CSV data to a file
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| f = File.stream!("Locations.csv") | |
| %File.Stream{ | |
| line_or_bytes: :line, | |
| modes: [:raw, :read_ahead, :binary], | |
| path: "Locations.csv", | |
| raw: true | |
| } | |
| City |> Repo.all() |> Repo.preload([:county, county: [:state]]) |> Enum.map(&([&1.id, &1.county.state.id])) |> CSV.encode() |> Stream.into(f) |> Stream.run() | |
| :ok |
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