Error with saving to mongo db

dersar00

Hello!
Like a mongodb driver for elixir I using Mongo.Ecto.

When I try to save something using using command insert:

of = %Friends.Person{age: 44}
Friends.Repo.insert(of)

I got error:

** (exit) exited in: GenServer.call(Friends.Repo.Pool, :topology, 5000)
    ** (EXIT) no process: the process is not alive or there's no process currently associated with the given name, possibly because its application isn't started
    (elixir) lib/gen_server.ex:824: GenServer.call/3
    (mongodb) lib/mongo.ex:750: Mongo.select_servers/4
    (mongodb) lib/mongo.ex:727: Mongo.select_server/3
    (mongodb) lib/mongo.ex:501: Mongo.insert_one/4
    (mongodb_ecto) lib/mongo_ecto/connection.ex:120: Mongo.Ecto.Connection.insert/3
    (mongodb_ecto) lib/mongo_ecto.ex:630: Mongo.Ecto.insert/6
    (ecto) lib/ecto/repo/schema.ex:469: Ecto.Repo.Schema.apply/4
    (ecto) lib/ecto/repo/schema.ex:205: anonymous fn/13 in Ecto.Repo.Schema.do_insert/4

I did everything as in a guide: Getting Started — Ecto v3.14.0

20 comments

#mongodb #troubleshooting

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2018-04-11 07:53:46 UTC

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NobbZ

Please double check if you have started your supervision tree and your repo gets started as a part of it.

Post #1

dersar00

My lib/friends/aplication.ex file:

defmodule Friends.Application do
  # See https://hexdocs.pm/elixir/Application.html
  # for more information on OTP Applications
  @moduledoc false

  use Application

  def start(_type, _args) do
    # List all child processes to be supervised
    children = [
      Friends.Repo
      # {Friends.Worker, arg},
    ]

    # See https://hexdocs.pm/elixir/Supervisor.html
    # for other strategies and supported options
    opts = [strategy: :one_for_one, name: Friends.Supervisor]
    Supervisor.start_link(children, opts)
  end
end

Post #2

Ankhers

Can you tell me which versions of the mongodb_ecto and mongodb packages you are using?

Post #3

dersar00

mongo_ecto -v 0.2.0

Post #4

Ankhers

Are you getting any errors on startup saying that something failed? Have you tried running a mix deps.clean?

Post #5

dersar00

I didn’t got any error.
mix deps.clean didn’t help.

Post #6

Ankhers

What version of the mongodb package are you using?

Post #7

dersar00

v3.6.3

Post #8

Ankhers

That version doesn’t exist for the mongodb package. The latest version is 0.4.5 (unless you are using a different package). Can you just copy the relevant lines from the mix.lock file?

Post #9

dersar00

ohh, sorry I realy use 0.4.5 version:

"mongodb": {:hex, :mongodb, "0.4.5", "b46e7fdbbcc1f6ba7b893f5ddcc154b59858e0940794a955ab3ce8ae8bbe970b", [:mix], [{:connection, "~> 1.0", [hex: :connection, repo: "hexpm", optional: false]}, {:db_connection, "~> 1.1", [hex: :db_connection, repo: "hexpm", optional: false]}], "hexpm"},
  "mongodb_ecto": {:hex, :mongodb_ecto, "0.2.0", "5eccf19f3798c0a5c39428c6d33394b55038f902bd60f7a4fb1f9ffb1f4ece97", [:mix], [{:ecto, "~> 2.1.0", [hex: :ecto, repo: "hexpm", optional: false]}, {:mongodb, "~> 0.4.2", [hex: :mongodb, repo: "hexpm", optional: false]}], "hexpm"}

Post #10

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