Using the vue.js front end I had errors updating articles:

https://github.com/gothinkster/elixir-phoenix-realworld-example-app/blob/master/lib/real_world_web/controllers/article_controller.ex#L66

  def update(conn, %{"id" => slug, "article" => article_params}, user) do
    article =
      slug
      |> Blog.get_article_by_slug!()
      |> Repo.preload([:author, :favorites])
      |> Blog.load_favorite(user)

    with {:ok, %Article{} = article} <- Blog.update_article(article, article_params) do
      render(conn, "show.json", article: article)
    end
  end

Modified to use slug to get the article.

in config.exs we should move this value to a env var

Current Behaviour

As pointed out on #3, we currently can't delete an article with a favorite count on it

[error] #PID<0.499.0> running RealWorldWeb.Endpoint terminated
Server: localhost:4000 (http)
Request: DELETE //articles/hello-x
** (exit) an exception was raised:
    ** (Ecto.ConstraintError) constraint error when attempting to delete struct:

    * foreign_key: favorites_article_id_fkey

If you would like to convert this constraint into an error, please
call foreign_key_constraint/3 in your changeset and define the proper
constraint name. The changeset has not defined any constraint.

Expected Behaviour

Delete favourites while deleting the article.

Hi!
Should we wrap your example of app to docker?
If you find it is useful, please do not hesitate to contact me and I create .dockerfile and other configuration management actions for it!
:-)

I'm a postgres noob and when following the README.md to run this locally on my macbook.
But on running the mix ecto.create command I get below error about a role "postgres" does not exist.

I have installed postgres using brew (and started it using pg_ctl -D /usr/local/var/postgres start as brew suggests after successful install).

14:37:22.569 [error] GenServer #PID<0.516.0> terminating
** (Postgrex.Error) FATAL 28000 (invalid_authorization_specification): role "postgres" does not exist
    (db_connection 1.1.3) lib/db_connection/connection.ex:163: DBConnection.Connection.connect/2
    (connection 1.0.4) lib/connection.ex:622: Connection.enter_connect/5
    (stdlib 3.13.2) proc_lib.erl:226: :proc_lib.init_p_do_apply/3
Last message: nil
State: Postgrex.Protocol
** (Mix) The database for RealWorld.Repo couldn't be created: FATAL 28000 (invalid_authorization_specification): role "postgres" does not exist

how to serve the client side with this, please explain this in the repo.
using https://github.com/rtfeldman/elm-spa-example and changing api url to http://localhost:4000,
still i get error http://localhost:4000/api/articles?limit=10&offset=0 not found.

Liked the code. Easy install, goes everything smooth and application starts. Now don't know where to go, what to open in browser which shows me the the working example.

I know it's a lot to ask but i am sure people new to elixir/erlang/phoenix would love to see it in action.

Hi, Error When running mix phx.server - I am getting the following error though I have all the deps.get, compile steps complete.
Can someone help ?
** (Mix) Could not start application real_world: RealWorld.Application.start(:normal, []) returned an error: shutdown: failed to start child: RealWorldWeb.Endpoint
** (EXIT) shutdown: failed to start child: Phoenix.PubSub.PG2
** (EXIT) shutdown: failed to start child: Phoenix.PubSub.PG2Server
** (EXIT) an exception was raised:
** (UndefinedFunctionError) function :pg2.create/1 is undefined or private
(kernel 8.1.3) :pg2.create({:phx, RealWorld.PubSub})
(phoenix_pubsub 1.1.2) lib/phoenix/pubsub/pg2_server.ex:43: Phoenix.PubSub.PG2Server.init/1
(stdlib 3.16.1) gen_server.erl:423: :gen_server.init_it/2
(stdlib 3.16.1) gen_server.erl:390: :gen_server.init_it/6
(stdlib 3.16.1) proc_lib.erl:226: :proc_lib.init_p_do_apply/3

I have done mix hex.local --force and still getting the error

Migrated from https://github.com/lbighetti/elixir-phoenix-realworld/issues/43 opened by @mydearxym

1. can't display articles base on tag

tag is passed in (Parameters: %{"limit" => "10", "offset" => "0", "tag" => "elixir"}) , but you simply ignored all the params?

2. pagination is not work

reason is the same above

3. can't delete a article with a favorite count on it

[error] #PID<0.499.0> running RealWorldWeb.Endpoint terminated
Server: localhost:4000 (http)
Request: DELETE //articles/hello-x
** (exit) an exception was raised:
    ** (Ecto.ConstraintError) constraint error when attempting to delete struct:

    * foreign_key: favorites_article_id_fkey

If you would like to convert this constraint into an error, please
call foreign_key_constraint/3 in your changeset and define the proper
constraint name. The changeset has not defined any constraint.

Hello, I cloned the repository then executed:

cp config/dev.exs.example config/dev.exs
mix deps.get
mix ecto.create
mix ecto.migrate
mix phx.server

I have the following errors when executing mix phx.server:

warning: please add the following dependency to your mix.exs:

{:plug_cowboy, "~> 1.0"}

This dependency is required by Plug.Adapters.Cowboy
which you may be using directly or indirectly.
Note you no longer need to depend on :cowboy directly.

[info] Application real_world exited: RealWorld.Application.start(:normal, []) returned an error: shutdown: failed to start child: RealWorldWeb.Endpoint
** (EXIT) shutdown: failed to start child: Phoenix.Endpoint.Handler
** (EXIT) "plug_cowboy dependency missing"
** (Mix) Could not start application real_world: RealWorld.Application.start(:normal, []) returned an error: shutdown: failed to start child: RealWorldWeb.Endpoint
** (EXIT) shutdown: failed to start child: Phoenix.Endpoint.Handler
** (EXIT) "plug_cowboy dependency missing"

I believe https://github.com/gothinkster/elixir-phoenix-realworld-example-app/blob/master/lib/real_world_web/controllers/user_controller.ex#L29-L35 is redundant and confusing. There is no need to check user for nil and render 404.json, as Guardian already has an error handler which will be invoked when trying to access UserController#current_user without being authenticated.

Trying cockroachdb on 2.1 beta (v2.1.0-beta.20181015):

• Cannot create a database automatically, but can migrate with ecto.migrate (expected)
• Getting list of tags fails
  Replaced query with:

  def list_tags do
    Ecto.Adapters.SQL.query!(Repo, "select count(*) as tag_count, ut.tag
    from articles, (select unnest(tag_list) from articles) as ut(tag)
    group by ut.tag
    order by tag_count desc limit 5;").rows
    |> Enum.map(fn v -> Enum.at(v, 1) end)
  end

Current Behaviour

As pointed out by #3 we are ignoring params passed to index and feed on ArticleController
Passing offset and limit will not produce pagination, neither does any default values or

  def index(conn, _params, user, _full_claims) do
    articles = Blog.list_articles()
               |> Repo.preload([:author, :favorites])
               |> Blog.load_favorites(user)
    render(conn, "index.json", articles: articles)
  end

Expected Behaviour

Return of index and feed should be produced with pagination, and params to use it such as limit and offset should work.
For example params = %{"limit" => "10", "offset" => "0"} should return the first page of the results with 10 items.

If it's a 'real world app' it needs to handle CORS.

Current Behaviour

As pointed out by #3 we are ignoring params passed to index and feed on ArticleController
Passing tag for example will not filter the articles per tag

  def index(conn, _params, user, _full_claims) do
    articles = Blog.list_articles()
               |> Repo.preload([:author, :favorites])
               |> Blog.load_favorites(user)
    render(conn, "index.json", articles: articles)
  end

Expected Behaviour

Passing parameters to these functions should produce a filtered result.
For example params = %{"tag" => "elixir"} should return only articles with tag elixir

Hi all,

I'm trying to run this example and am getting:

~/src/elixir-phoenix-realworld-example-app [master*]$ mix ecto.create
==> comeonin
mkdir -p priv
cc -g -O3 -Wall -I/usr/lib64/erlang/erts-10.3.5.5/include -Ic_src -fPIC -shared  c_src/bcrypt_nif.c c_src/blowfish.c -o priv/bcrypt_nif.so
/usr/bin/ld: cannot find crti.o: No such file or directory
collect2: error: ld returned 1 exit status
make: *** [Makefile:30: priv/bcrypt_nif.so] Error 1
could not compile dependency :comeonin, "mix compile" failed. You can recompile this dependency with "mix deps.compile comeonin", update it with "mix deps.update comeonin" or clean it with "mix deps.clean comeonin"
==> real_world
** (Mix) Could not compile with "make" (exit status: 2).
You need to have gcc and make installed. If you are using
Ubuntu or any other Debian-based system, install the packages
"build-essential". Also install "erlang-dev" package if not
included in your Erlang/OTP version. If you're on Fedora, run
"dnf group install 'Development Tools'".

I do have Development Tools installed and can see this:

ls -lh /usr/lib64/crti*
-rw-r--r-- 1 root root 1.8K Sep  4 20:48 /usr/lib64/crti.o

Any pointers?

Thanks.

Dependencies are Elixir, Phoenix, PostgreSQL, but Phoenix depends on Postgresql so the order isn't right
The Phoenix docs say to install mix local.hex but that doesn't work
I skip that and continue on your instructions, and mix deps.get offers to install hex. Goodie.
But then: mix ecto.create installs a lot but fails at

...
14:04:16.964 [error] GenServer #PID<0.7212.0> terminating
** (Postgrex.Error) FATAL 28P01 (invalid_password): password authentication failed for user "postgres"
    (db_connection 1.1.3) lib/db_connection/connection.ex:163: DBConnection.Connection.connect/2
    (connection 1.0.4) lib/connection.ex:622: Connection.enter_connect/5
    (stdlib 3.13) proc_lib.erl:226: :proc_lib.init_p_do_apply/3
Last message: nil
State: Postgrex.Protocol
** (Mix) The database for RealWorld.Repo couldn't be created: FATAL 28P01 (invalid_password): password authentication failed for user "postgres"

Presumably I should have created the postgres user, but this isn't mentioned anywhere.
But I rarely use postgres, so I wouldn't know where to begin

elixir -v
Erlang/OTP 21 [erts-10.0.3] [source] [64-bit] [smp:4:4] [ds:4:4:10] [async-threads:1] [hipe] [dtrace]

Elixir 1.6.6 (compiled with OTP 20)

after follow-ing readme instructions & ensuring that there is no other elixir process running:

mix phx.server

[info] GET /phoenix/live_reload/socket/websocket
[debug] ** (Phoenix.Router.NoRouteError) no route found for GET /phoenix/live_reload/socket/websocket (RealWorldWeb.Router)
(real_world) lib/real_world_web/router.ex:1: RealWorldWeb.Router.match_route/4
(real_world) lib/phoenix/router.ex:303: RealWorldWeb.Router.call/2
(real_world) lib/real_world_web/endpoint.ex:1: RealWorldWeb.Endpoint.plug_builder_call/2
(real_world) lib/plug/debugger.ex:102: RealWorldWeb.Endpoint."call (overridable 3)"/2
(real_world) lib/real_world_web/endpoint.ex:1: RealWorldWeb.Endpoint.call/2
(plug) lib/plug/adapters/cowboy/handler.ex:16: Plug.Adapters.Cowboy.Handler.upgrade/4
(cowboy) /Users/sylvan/elixir-phoenix-realworld-example-app/deps/cowboy/src/cowboy_protocol.erl:442: :cowboy_protocol.execute/4

Please note that mix test run with no issue.

Current guardian being used is 0.14.5

Heeey,

I'm running the following command:
mix ecto.create

And the following occurs:
xcrun: error: invalid active developer path (/Library/Developer/CommandLineTools), missing xcrun at: /Library/Developer/CommandLineTools/usr/bin/xcrun could not compile dependency :comeonin, "mix compile" failed. You can recompile this dependency with "mix deps.compile comeonin", update it with "mix deps.update comeonin" or clean it with "mix deps.clean comeonin"

I already install make and nothing changes.

I'm using macOS 10.15.1