added new crud example

Author: zookzook

.gitignore

@@ -1,9 +1,9 @@
-/_build
-/doc
-/deps
+_build/
+doc/
+deps/
 erl_crash.dump
 *.ez
-/tmp
+tmp/
 .tool-versions
 .elixir_ls
 plt_core_path/*.plt

examples/crud_example/.formatter.exs

@@ -0,0 +1,4 @@
+# Used by "mix format"
+[
+  inputs: ["{mix,.formatter}.exs", "{config,lib,test}/**/*.{ex,exs}"]
+]

examples/crud_example/README.md

@@ -0,0 +1,22 @@
+# CrudExample
+
+This project shows basic CRUD examples. You can use your own MongoDB instance or just use Docker to start a MongoDb container by calling: 
+
+        docker-compose up -d mongodb
+        
+After that go to the project folder an start
+
+        #> mix deps.get
+        #> iex -S mix
+        
+        iex(1)> CrudExample.example_1()
+        iex(1)> CrudExample.example_2()
+        
+## `example_1`
+
+In this function we are using one connection to the database without using the application supervisor.
+
+## `example_2`
+
+The same operation like `example_1` but now using the connection pooling and application supervisor.
+

examples/crud_example/config/config.exs

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+# This file is responsible for configuring your application
+# and its dependencies with the aid of the Mix.Config module.
+use Mix.Config
+
+# This configuration is loaded before any dependency and is restricted
+# to this project. If another project depends on this project, this
+# file won't be loaded nor affect the parent project. For this reason,
+# if you want to provide default values for your application for
+# third-party users, it should be done in your "mix.exs" file.
+
+# You can configure your application as:
+#
+#     config :crud_example, key: :value
+#
+# and access this configuration in your application as:
+#
+#     Application.get_env(:crud_example, :key)
+#
+# You can also configure a third-party app:
+#
+#     config :logger, level: :info
+#
+
+# It is also possible to import configuration files, relative to this
+# directory. For example, you can emulate configuration per environment
+# by uncommenting the line below and defining dev.exs, test.exs and such.
+# Configuration from the imported file will override the ones defined
+# here (which is why it is important to import them last).
+#
+#     import_config "#{Mix.env()}.exs"

examples/crud_example/docker-compose.yaml

@@ -0,0 +1,21 @@
+version: '3'
+services:
+
+  mongodb:
+    image: mongo:4
+    ports:
+      - "27017:27017"
+    volumes:
+      - mongodb-volume:/data/db
+    networks:
+      - crud
+    logging:
+      options:
+        max-size: "10k"
+        max-file: "1"
+
+volumes:
+  mongodb-volume:
+
+networks:
+  crud:

examples/crud_example/lib/crud_example.ex

@@ -0,0 +1,64 @@
+defmodule CrudExample do
+
+  def create_vcard() do
+    %{
+      firstname: "Alexander",
+      lastname: "Abendroth",
+      contact: %{
+        email: "[email protected]",
+        telephone: "+49 111938947373",
+        mobile: "+49 222192938383",
+        fax: "+49 3332929292"
+      },
+      addess: %{
+        street: "Fasanenweg 5",
+        postal_code: "12345",
+        city: "Berlin",
+        country: "de"
+      }
+    }
+  end
+
+  def example_1() do
+
+    {:ok, top} = Mongo.start_link(url: "mongodb://localhost:27017/db-1")
+    
+    result = Mongo.insert_one(top, "people", create_vcard())
+
+    IO.puts "#{inspect result}\n"
+
+    result = Mongo.find_one(top, "people", %{})
+    IO.puts "#{inspect result}\n"
+
+    result = Mongo.update_one(top, "people", %{lastname: "Abendroth"}, ["$set": ["address.postal_code": "20000"]])
+    IO.puts "#{inspect result}\n"
+
+    result = Mongo.find_one(top, "people", %{"contact.email": "[email protected]"})
+    IO.puts "#{inspect result}\n"
+
+    result = Mongo.delete_one(top, "people", %{lastname: "Abendroth"})
+    IO.puts "#{inspect result}\n"
+
+  end
+
+  def example_2() do
+
+    {:ok, %Mongo.InsertOneResult{acknowledged: true, inserted_id: id}} = Mongo.insert_one(:mongo, "people", create_vcard())
+
+    IO.puts "ID is #{inspect id}\n"
+
+    result = Mongo.find_one(:mongo, "people", %{_id: id})
+    IO.puts "#{inspect result}\n"
+
+    result = Mongo.update_one(:mongo, "people", %{_id: id}, ["$set": ["address.postal_code": "20000"]])
+    IO.puts "#{inspect result}\n"
+
+    result = Mongo.find_one(:mongo, "people",%{_id: id})
+    IO.puts "#{inspect result}\n"
+
+    result = Mongo.delete_one(:mongo, "people", %{_id: id})
+    IO.puts "#{inspect result}\n"
+
+  end
+
+end

examples/crud_example/lib/crud_example/application.ex

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+defmodule CrudExample.Application do
+  @moduledoc false
+
+  use Application
+
+  def start(_type, _args) do
+    import Supervisor.Spec
+
+    children = [
+      worker(Mongo, [[name: :mongo, database: "db-1", pool_size: 3]])
+    ]
+
+    opts = [strategy: :one_for_one, name: CrudExample.Supervisor]
+    Supervisor.start_link(children, opts)
+  end
+end

examples/crud_example/mix.exs

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+defmodule CrudExample.MixProject do
+  use Mix.Project
+
+  def project do
+    [
+      app: :crud_example,
+      version: "0.1.0",
+      elixir: "~> 1.8",
+      start_permanent: Mix.env() == :prod,
+      deps: deps()
+    ]
+  end
+
+  # Run "mix help compile.app" to learn about applications.
+  def application do
+    [
+      extra_applications: [:logger],
+      mod: {CrudExample.Application, []}
+    ]
+  end
+
+  # Run "mix help deps" to learn about dependencies.
+  defp deps do
+    [
+      {:mongodb_driver, "~> 0.5"}
+    ]
+  end
+end

examples/crud_example/mix.lock

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+%{
+  "connection": {:hex, :connection, "1.0.4", "a1cae72211f0eef17705aaededacac3eb30e6625b04a6117c1b2db6ace7d5976", [:mix], [], "hexpm"},
+  "db_connection": {:hex, :db_connection, "2.0.6", "bde2f85d047969c5b5800cb8f4b3ed6316c8cb11487afedac4aa5f93fd39abfa", [:mix], [{:connection, "~> 1.0.2", [hex: :connection, repo: "hexpm", optional: false]}], "hexpm"},
+  "decimal": {:hex, :decimal, "1.8.0", "ca462e0d885f09a1c5a342dbd7c1dcf27ea63548c65a65e67334f4b61803822e", [:mix], [], "hexpm"},
+  "mongodb_driver": {:hex, :mongodb_driver, "0.5.7", "f29cab9a011f685210c472888ee3fde3573459323f839b67c4d942e067d9eda1", [:mix], [{:connection, "~> 1.0", [hex: :connection, repo: "hexpm", optional: false]}, {:db_connection, "~> 2.0.6", [hex: :db_connection, repo: "hexpm", optional: false]}, {:decimal, "~> 1.5", [hex: :decimal, repo: "hexpm", optional: false]}], "hexpm"},
+}

examples/crud_example/test/crud_example_test.exs

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+defmodule CrudExampleTest do
+  use ExUnit.Case
+  doctest CrudExample
+
+  test "greets the world" do
+    assert CrudExample.hello() == :world
+  end
+end