Hi Everyoen,
I am reading the book Programming Phoenix and I faced the following error when I wrote the code example up to page 45.
function Routes.user_path/3 is undefined (module Routes is not available)
I did may things, searched StackOverflow etc, but didn’t find any answer.
Somebody please help me!
Thank you.
Did You update the router file?
@kokolegorille It looks like the following,
scope "/", RumblWeb do
pipe_through :browser # Use the default browser stack
get "/users", UserController, :index
get "/users/:id", UserController, :show
get "/", PageController, :index
endYou can use mix phx.routes to view path helpers.
Try to remove Routes.
It might be a typo
Update: Or a new feature of version 1.4 
If you take a look at this video, the Routes.<some>_path will be used in phoenix 1.4
I don’t think it’s available in 1.3.2
This is the output of mix phx.routes
warning: Plug.Conn.WrapperError.reraise/3 is deprecated. Use reraise/1 or reraise/4 instead.
Found at 2 locations:
lib/rumbl_web/router.ex:4
lib/rumbl_web/router.ex:12
warning: function Routes.user_path/3 is undefined (module Routes is not available)
lib/rumbl_web/templates/user/index.html.eex:7
user_path GET /users RumblWeb.UserController :index
user_path GET /users/:id RumblWeb.UserController :show
page_path GET / RumblWeb.PageController :indexWhat do you mean by removing routes, do you mean to remove the two lines,
get "/users", UserController, :index
get "/users/:id", UserController, :show
, from router.ex ?
In the template…
<%= link "View", to: Routes.user_path(@conn, :show, user.id) %>
in templates/user/index.html.eex
Yes, removing Routes. worked, but was it a typo in the book?
In 1.4
and
vs. 1.3
and
So you are going to encounter this with all the helpers defined by Phoenix.Router.Helpers like page_path, page_url,user_path, user_url, session_path, session_url, etc.
For other differences check the Change Log 1.4.0-dev.
And p.38 would have probably been the perfect time to replace Brunch with Webpack.
More or less …
In rumbl/assets:
$ rm brunch-config.js
$ npm un babel-brunch clean-css-brunch uglify-js-brunch brunch
$ npm i -D webpack@^4.4.0 webpack-cli@^2.0.10 babel-core@^6.26.0 babel-loader@^7.1.3 babel-preset-env@^1.6.1 copy-webpack-plugin@^4.5.0 css-loader@^0.28.10 mini-css-extract-plugin@^0.4.0 optimize-css-assets-webpack-plugin@^1.2.4 uglifyjs-webpack-plugin@^1.2.4
Update scripts in rumbl/assets/package.json:
{
"repository": {},
"license": "MIT",
"scripts": {
"deploy": "webpack --mode production",
"watch": "webpack --mode development -watch"
},
"dependencies": {
"phoenix": "file:../deps/phoenix",
"phoenix_html": "file:../deps/phoenix_html"
},
"devDependencies": {
"babel-core": "^6.26.3",
"babel-loader": "^7.1.4",
"babel-preset-env": "^1.7.0",
"copy-webpack-plugin": "^4.5.1",
"css-loader": "^0.28.11",
"mini-css-extract-plugin": "^0.4.0",
"optimize-css-assets-webpack-plugin": "^1.3.2",
"uglifyjs-webpack-plugin": "^1.2.5",
"webpack": "^4.9.1",
"webpack-cli": "^2.1.4"
}
}
Create rumbl/assets/webpack.config.js:
const path = require('path');
const MiniCssExtractPlugin = require('mini-css-extract-plugin');
const UglifyJsPlugin = require('uglifyjs-webpack-plugin');
const OptimizeCSSAssetsPlugin = require('optimize-css-assets-webpack-plugin');
const CopyWebpackPlugin = require('copy-webpack-plugin');
module.exports = (env, options) => ({
optimization: {
minimizer: [
new UglifyJsPlugin({ cache: true, parallel: true, sourceMap: false }),
new OptimizeCSSAssetsPlugin({})
]
},
entry: './js/app.js',
output: {
filename: 'app.js',
path: path.resolve(__dirname, '../priv/static/js')
},
module: {
rules: [
{
test: /\.js$/,
exclude: /node_modules/,
use: {
loader: 'babel-loader'
}
},
{
test: /\.css$/,
use: [MiniCssExtractPlugin.loader, 'css-loader']
}
]
},
plugins: [
new MiniCssExtractPlugin({ filename: '../css/app.css' }),
new CopyWebpackPlugin([{ from: 'static/', to: '../' }])
]
});
Create rumbl/assets/.babelrc:
{
"presets": [
"env"
]
}
Replace rumbl/assets/js/app.js:
// We need to import the CSS so that webpack will load it.
// The MiniCssExtractPlugin is used to separate it out into
// its own CSS file.
import css from "../css/app.css"
// webpack automatically bundles all modules in your
// entry points. Those entry points can be configured
// in "webpack.config.js".
//
// Import dependencies
//
import "phoenix_html"
// Import local files
//
// Local files can be imported directly using relative
// paths "./socket" or full ones "web/static/js/socket".
// import socket from "./socket"
Replace rumbl/assets/css/app.css
/* This file is for your main application css. */
@import "./phoenix.css";
Replace rumbl/assets/css/phoenix.css with contents from
https://raw.githubusercontent.com/phoenixframework/phoenix/master/installer/templates/phx_assets/phoenix.css
Modify rumbl/config/dev.exs:
watchers: [node: ["node_modules/webpack/bin/webpack.js", "--mode", "development", "--watch-stdin",
cd: Path.expand("../assets", __DIR__)]]
Replace rumbl/lib/rumbl_web/templates/layout/app.html.eex:
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1.0, minimum-scale=1.0, maximum-scale=1.0, shrink-to-fit=no, user-scalable=no"/>
<title>Hello Rumbl!</title>
<link rel="stylesheet" href="<%= static_path(@conn, "/css/app.css") %>">
</head>
<body>
<header>
<section class="container">
<nav role="navigation">
<ul>
<li><a href="http://www.phoenixframework.org/docs">Get Started</a></li>
</ul>
</nav>
<a href="http://phoenixframework.org/" class="phx-logo">
<img src="<%= static_path(@conn, "/images/phoenix.png") %>" alt="Phoenix Framework Logo"/>
</a>
</section>
</header>
<main role="main" class="container">
<p class="alert alert-info" role="alert"><%= get_flash(@conn, :info) %></p>
<p class="alert alert-danger" role="alert"><%= get_flash(@conn, :error) %></p>
<%= render @view_module, @view_template, assigns %>
</main>
<script src="<%= static_path(@conn, "/js/app.js") %>"></script>
</body>
</html>
How do I generate Phoenix 1.4 project now?
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