add community and meetup

app/config/test.exs

@@ -7,8 +7,8 @@ import Config
 # Run `mix help test` for more information.
 config :elixir_lang_tokyo, ElixirLangTokyo.Repo,
   username: "root",
-  password: "",
-  hostname: "localhost",
+  password: "root",
+  hostname: "mysql",
   database: "elixir_lang_tokyo_test#{System.get_env("MIX_TEST_PARTITION")}",
   pool: Ecto.Adapters.SQL.Sandbox,
   pool_size: 10

app/lib/elixir_lang_tokyo/community.ex

@@ -0,0 +1,104 @@
+defmodule ElixirLangTokyo.Community do
+  @moduledoc """
+  The Community context.
+  """
+
+  import Ecto.Query, warn: false
+  alias ElixirLangTokyo.Repo
+
+  alias ElixirLangTokyo.Community.Meetup
+
+  @doc """
+  Returns the list of meetups.
+
+  ## Examples
+
+      iex> list_meetups()
+      [%Meetup{}, ...]
+
+  """
+  def list_meetups do
+    Repo.all(Meetup)
+  end
+
+  @doc """
+  Gets a single meetup.
+
+  Raises `Ecto.NoResultsError` if the Meetup does not exist.
+
+  ## Examples
+
+      iex> get_meetup!(123)
+      %Meetup{}
+
+      iex> get_meetup!(456)
+      ** (Ecto.NoResultsError)
+
+  """
+  def get_meetup!(id), do: Repo.get!(Meetup, id)
+
+  @doc """
+  Creates a meetup.
+
+  ## Examples
+
+      iex> create_meetup(%{field: value})
+      {:ok, %Meetup{}}
+
+      iex> create_meetup(%{field: bad_value})
+      {:error, %Ecto.Changeset{}}
+
+  """
+  def create_meetup(attrs \\ %{}) do
+    %Meetup{}
+    |> Meetup.changeset(attrs)
+    |> Repo.insert()
+  end
+
+  @doc """
+  Updates a meetup.
+
+  ## Examples
+
+      iex> update_meetup(meetup, %{field: new_value})
+      {:ok, %Meetup{}}
+
+      iex> update_meetup(meetup, %{field: bad_value})
+      {:error, %Ecto.Changeset{}}
+
+  """
+  def update_meetup(%Meetup{} = meetup, attrs) do
+    meetup
+    |> Meetup.changeset(attrs)
+    |> Repo.update()
+  end
+
+  @doc """
+  Deletes a meetup.
+
+  ## Examples
+
+      iex> delete_meetup(meetup)
+      {:ok, %Meetup{}}
+
+      iex> delete_meetup(meetup)
+      {:error, %Ecto.Changeset{}}
+
+  """
+  def delete_meetup(%Meetup{} = meetup) do
+    Repo.delete(meetup)
+  end
+
+  @doc """
+  Returns an `%Ecto.Changeset{}` for tracking meetup changes.
+
+  ## Examples
+
+      iex> change_meetup(meetup)
+      %Ecto.Changeset{data: %Meetup{}}
+
+  """
+  def change_meetup(%Meetup{} = meetup, attrs \\ %{}) do
+    Meetup.changeset(meetup, attrs)
+  end
+end

app/lib/elixir_lang_tokyo/community/meetup.ex

@@ -0,0 +1,19 @@
+defmodule ElixirLangTokyo.Community.Meetup do
+  use Ecto.Schema
+  import Ecto.Changeset
+
+  schema "meetups" do
+    field :hashtag, :string
+    field :name, :string
+    field :site, :string
+
+    timestamps()
+  end
+
+  @doc false
+  def changeset(meetup, attrs) do
+    meetup
+    |> cast(attrs, [:name, :site, :hashtag])
+    |> validate_required([:name, :site, :hashtag])
+  end
+end

app/lib/elixir_lang_tokyo_web/controllers/meetup_controller.ex

@@ -0,0 +1,62 @@
+defmodule ElixirLangTokyoWeb.MeetupController do
+  use ElixirLangTokyoWeb, :controller
+
+  alias ElixirLangTokyo.Community
+  alias ElixirLangTokyo.Community.Meetup
+
+  def index(conn, _params) do
+    meetups = Community.list_meetups()
+    render(conn, "index.html", meetups: meetups)
+  end
+
+  def new(conn, _params) do
+    changeset = Community.change_meetup(%Meetup{})
+    render(conn, "new.html", changeset: changeset)
+  end
+
+  def create(conn, %{"meetup" => meetup_params}) do
+    case Community.create_meetup(meetup_params) do
+      {:ok, meetup} ->
+        conn
+        |> put_flash(:info, "Meetup created successfully.")
+        |> redirect(to: Routes.meetup_path(conn, :show, meetup))
+
+      {:error, %Ecto.Changeset{} = changeset} ->
+        render(conn, "new.html", changeset: changeset)
+    end
+  end
+
+  def show(conn, %{"id" => id}) do
+    meetup = Community.get_meetup!(id)
+    render(conn, "show.html", meetup: meetup)
+  end
+
+  def edit(conn, %{"id" => id}) do
+    meetup = Community.get_meetup!(id)
+    changeset = Community.change_meetup(meetup)
+    render(conn, "edit.html", meetup: meetup, changeset: changeset)
+  end
+
+  def update(conn, %{"id" => id, "meetup" => meetup_params}) do
+    meetup = Community.get_meetup!(id)
+
+    case Community.update_meetup(meetup, meetup_params) do
+      {:ok, meetup} ->
+        conn
+        |> put_flash(:info, "Meetup updated successfully.")
+        |> redirect(to: Routes.meetup_path(conn, :show, meetup))
+
+      {:error, %Ecto.Changeset{} = changeset} ->
+        render(conn, "edit.html", meetup: meetup, changeset: changeset)
+    end
+  end
+
+  def delete(conn, %{"id" => id}) do
+    meetup = Community.get_meetup!(id)
+    {:ok, _meetup} = Community.delete_meetup(meetup)
+
+    conn
+    |> put_flash(:info, "Meetup deleted successfully.")
+    |> redirect(to: Routes.meetup_path(conn, :index))
+  end
+end

app/lib/elixir_lang_tokyo_web/router.ex

@@ -18,6 +18,8 @@ defmodule ElixirLangTokyoWeb.Router do
     pipe_through :browser
 
     get "/", PageController, :index
+
+    resources "/meetups", MeetupController
   end
 
   # Other scopes may use custom stacks.

app/lib/elixir_lang_tokyo_web/templates/meetup/edit.html.heex

@@ -0,0 +1,5 @@
+<h1>Edit Meetup</h1>
+
+<%= render "form.html", Map.put(assigns, :action, Routes.meetup_path(@conn, :update, @meetup)) %>
+
+<span><%= link "Back", to: Routes.meetup_path(@conn, :index) %></span>

app/lib/elixir_lang_tokyo_web/templates/meetup/form.html.heex

@@ -0,0 +1,23 @@
+<.form let={f} for={@changeset} action={@action}>
+  <%= if @changeset.action do %>
+    <div class="alert alert-danger">
+      <p>Oops, something went wrong! Please check the errors below.</p>
+    </div>
+  <% end %>
+
+  <%= label f, :name %>
+  <%= text_input f, :name %>
+  <%= error_tag f, :name %>
+
+  <%= label f, :site %>
+  <%= text_input f, :site %>
+  <%= error_tag f, :site %>
+
+  <%= label f, :hashtag %>
+  <%= text_input f, :hashtag %>
+  <%= error_tag f, :hashtag %>
+
+  <div>
+    <%= submit "Save" %>
+  </div>
+</.form>

app/lib/elixir_lang_tokyo_web/templates/meetup/index.html.heex

@@ -0,0 +1,30 @@
+<h1>Listing Meetups</h1>
+
+<table>
+  <thead>
+    <tr>
+      <th>Name</th>
+      <th>Site</th>
+      <th>Hashtag</th>
+
+      <th></th>
+    </tr>
+  </thead>
+  <tbody>
+<%= for meetup <- @meetups do %>
+    <tr>
+      <td><%= meetup.name %></td>
+      <td><%= meetup.site %></td>
+      <td><%= meetup.hashtag %></td>
+
+      <td>
+        <span><%= link "Show", to: Routes.meetup_path(@conn, :show, meetup) %></span>
+        <span><%= link "Edit", to: Routes.meetup_path(@conn, :edit, meetup) %></span>
+        <span><%= link "Delete", to: Routes.meetup_path(@conn, :delete, meetup), method: :delete, data: [confirm: "Are you sure?"] %></span>
+      </td>
+    </tr>
+<% end %>
+  </tbody>
+</table>
+
+<span><%= link "New Meetup", to: Routes.meetup_path(@conn, :new) %></span>

app/lib/elixir_lang_tokyo_web/templates/meetup/new.html.heex

@@ -0,0 +1,5 @@
+<h1>New Meetup</h1>
+
+<%= render "form.html", Map.put(assigns, :action, Routes.meetup_path(@conn, :create)) %>
+
+<span><%= link "Back", to: Routes.meetup_path(@conn, :index) %></span>

app/lib/elixir_lang_tokyo_web/templates/meetup/show.html.heex

@@ -0,0 +1,23 @@
+<h1>Show Meetup</h1>
+
+<ul>
+
+  <li>
+    <strong>Name:</strong>
+    <%= @meetup.name %>
+  </li>
+
+  <li>
+    <strong>Site:</strong>
+    <%= @meetup.site %>
+  </li>
+
+  <li>
+    <strong>Hashtag:</strong>
+    <%= @meetup.hashtag %>
+  </li>
+
+</ul>
+
+<span><%= link "Edit", to: Routes.meetup_path(@conn, :edit, @meetup) %></span> |
+<span><%= link "Back", to: Routes.meetup_path(@conn, :index) %></span>

app/lib/elixir_lang_tokyo_web/views/meetup_view.ex

@@ -0,0 +1,3 @@
+defmodule ElixirLangTokyoWeb.MeetupView do
+  use ElixirLangTokyoWeb, :view
+end

app/priv/repo/migrations/20220303132359_create_meetups.exs

@@ -0,0 +1,13 @@
+defmodule ElixirLangTokyo.Repo.Migrations.CreateMeetups do
+  use Ecto.Migration
+
+  def change do
+    create table(:meetups) do
+      add :name, :string
+      add :site, :string
+      add :hashtag, :string
+
+      timestamps()
+    end
+  end
+end

app/test/elixir_lang_tokyo/community_test.exs

@@ -0,0 +1,63 @@
+defmodule ElixirLangTokyo.CommunityTest do
+  use ElixirLangTokyo.DataCase
+
+  alias ElixirLangTokyo.Community
+
+  describe "meetups" do
+    alias ElixirLangTokyo.Community.Meetup
+
+    import ElixirLangTokyo.CommunityFixtures
+
+    @invalid_attrs %{hashtag: nil, name: nil, site: nil}
+
+    test "list_meetups/0 returns all meetups" do
+      meetup = meetup_fixture()
+      assert Community.list_meetups() == [meetup]
+    end
+
+    test "get_meetup!/1 returns the meetup with given id" do
+      meetup = meetup_fixture()
+      assert Community.get_meetup!(meetup.id) == meetup
+    end
+
+    test "create_meetup/1 with valid data creates a meetup" do
+      valid_attrs = %{hashtag: "some hashtag", name: "some name", site: "some site"}
+
+      assert {:ok, %Meetup{} = meetup} = Community.create_meetup(valid_attrs)
+      assert meetup.hashtag == "some hashtag"
+      assert meetup.name == "some name"
+      assert meetup.site == "some site"
+    end
+
+    test "create_meetup/1 with invalid data returns error changeset" do
+      assert {:error, %Ecto.Changeset{}} = Community.create_meetup(@invalid_attrs)
+    end
+
+    test "update_meetup/2 with valid data updates the meetup" do
+      meetup = meetup_fixture()
+      update_attrs = %{hashtag: "some updated hashtag", name: "some updated name", site: "some updated site"}
+
+      assert {:ok, %Meetup{} = meetup} = Community.update_meetup(meetup, update_attrs)
+      assert meetup.hashtag == "some updated hashtag"
+      assert meetup.name == "some updated name"
+      assert meetup.site == "some updated site"
+    end
+
+    test "update_meetup/2 with invalid data returns error changeset" do
+      meetup = meetup_fixture()
+      assert {:error, %Ecto.Changeset{}} = Community.update_meetup(meetup, @invalid_attrs)
+      assert meetup == Community.get_meetup!(meetup.id)
+    end
+
+    test "delete_meetup/1 deletes the meetup" do
+      meetup = meetup_fixture()
+      assert {:ok, %Meetup{}} = Community.delete_meetup(meetup)
+      assert_raise Ecto.NoResultsError, fn -> Community.get_meetup!(meetup.id) end
+    end
+
+    test "change_meetup/1 returns a meetup changeset" do
+      meetup = meetup_fixture()
+      assert %Ecto.Changeset{} = Community.change_meetup(meetup)
+    end
+  end
+end