Blog: Posts

Mix.install([
  {:jason, "~> 1.4"},
  {:kino, "~> 0.8.0", override: true},
  {:youtube, github: "brooklinjazz/youtube"},
  {:hidden_cell, github: "brooklinjazz/hidden_cell"}
])

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Blog: Posts

You’re going to create the Posts resource in your Blog project.

Blog posts should have a title, subtitle, and content. It should also have relevant timestamp information.

classDiagram
  class Post {
    title: :string
    subtitle: :string
    content: :text
  }

You may use Phoenix Generators or create the Controller, Context, and other infrastructure for the post resource or you may create it all from scratch.

Example Solution

Generate the resource.

$ mix phx.gen.html Posts Post posts title:string subtitle:string content:text
$ mix ecto.migrate

Then add the resource to router.ex.

scope "/", BlogWeb do
  pipe_through :browser

  get "/", PageController, :index
  resources "/posts", PostController
end

Alternatively we can define every route individually.

scope "/", BlogWeb do
  pipe_through :browser

  get "/", PageController, :index
  get "/posts", PostController, :index
  get "/posts/new", PostController, :new
  post "/posts", PostController, :create
  get "/posts/:id", PostController, :show
  get "/posts/:id/edit", PostController, :edit
  put "/posts/:id", PostController, :update
  patch "/posts/:id", PostController, :update
  delete "/posts/:id", PostController, :delete
end

Mark As Completed

file_name = Path.basename(Regex.replace(~r/#.+/, __ENV__.file, ""), ".livemd")

save_name =
  case Path.basename(__DIR__) do
    "reading" -> "blog_posts_reading"
    "exercises" -> "blog_posts_exercise"
  end

progress_path = __DIR__ <> "/../progress.json"
existing_progress = File.read!(progress_path) |> Jason.decode!()

default = Map.get(existing_progress, save_name, false)

form =
  Kino.Control.form(
    [
      completed: input = Kino.Input.checkbox("Mark As Completed", default: default)
    ],
    report_changes: true
  )

Task.async(fn ->
  for %{data: %{completed: completed}} <- Kino.Control.stream(form) do
    File.write!(
      progress_path,
      Jason.encode!(Map.put(existing_progress, save_name, completed), pretty: true)
    )
  end
end)

form

Commit Your Progress

Run the following in your command line from the curriculum folder to track and save your progress in a Git commit. Ensure that you do not already have undesired or unrelated changes by running git status or by checking the source control tab in Visual Studio Code.

$ git checkout -b blog-posts-exercise
$ git add .
$ git commit -m "finish blog posts exercise"
$ git push origin blog-posts-exercise

Create a pull request from your blog-posts-exercise branch to your solutions branch. Please do not create a pull request to the DockYard Academy repository as this will spam our PR tracker.

DockYard Academy Students Only:

Notify your teacher by including @BrooklinJazz in your PR description to get feedback. You (or your teacher) may merge your PR into your solutions branch after review.

If you are interested in joining the next academy cohort, sign up here to receive more news when it is available.

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