currently, I try to understand and learn Rails. The problem I face right now is that I have set up toastr via the importmap feature of Rails 7. Everything works fine when I use the console of the browser like toastr.success("Hello World!") shows a green toast on the top right corner of the screen. When I do the same thing in a script tag in an .hmtl.erb file I get Uncaught TypeError: toastr is undefined. I also tried assigning the toastr object to window and globalThis in the application.js file, but this wont work either, with the same error message.
I guess there is a sequencing issue because the erb files are created server side and the javascript is done client side, but I don't know how to fix this.
Important files:
// /app/javascript/application.js
import "jquery";
import "toastr";
// /app/views/layouts/application.html.erb
<!DOCTYPE html>
<html>
<head>
<title>Test</title>
<meta name="viewport" content="width=device-width,initial-scale=1">
<%= csrf_meta_tags %>
<%= csp_meta_tag %>
<%= stylesheet_link_tag "application", "data-turbo-track": "reload" %>
<%= javascript_importmap_tags %>
<script>
globalThis.toastr.success("Hello World!")
</script>
</head>
<body>
<h1>Hi!</h1>
</body>
</html>
# Pin npm packages by running ./bin/importmap
pin 'application', preload: true
pin 'toastr'
pin 'jquery'
If there is more you need, just let me know.
Thanks in advance!
Related
I am failing to render my application.html.erb template i am getting the following error
ActionView::SyntaxErrorInTemplate in ApplicationController#home
app/views/layouts/application.HTML.erb:10: syntax error, unexpected ':', expecting ')'
app/views/layouts/application.HTML.erb:11: syntax error, unexpected ':', expecting ')'
This is what the code looks like this application.html.erb
<!DOCTYPE html>
<html>
<head>
<title>Appz</title>
<meta name="viewport" content="width=device-width,initial-scale=1">
<%= csrf_meta_tags %>
<%= csp_meta_tag %>
<%= stylesheet_link_tag "application" , "data-turbo-track" : "reload" %>
<%= javascript_include_tag "application" , "data-turbo-track" : "reload" , defer: true %>
</head>
<body>
<div class="container">
<div class="row">
<div class="col">
</div>
</div>
</div>
<%= yield %>
</body>
</html>
my code looks ok I have tried everything what could be the problem
You need to remove white space before :. Change the line and below line like this:
<%= stylesheet_link_tag "application" , "data-turbo-track": "reload" %>
Yes removing the white space works apparently I had a formatting extension enabled in vs code and it was messing up my code it was auto indenting unnecessarily and messing up the code I only became aware when I tried to correct the code by removing the white space and each time I saved it auto indented until I disabled the extension and it stopped I have since uninstalled the extension.
So be careful what kind of extensions you install in your code editor you will get new and unfounded errors no one has seen before.
I created a model called Post for my rails projects
the problem is i keep on getting this error:
Errno::ENOENT in Posts#index
Showing C:/Users/Sam's/Desktop/Websites/projects/christina/cp-blog/app/views/layouts/application.html.erb where line #5 raised:
My application.html.erb file looks like this
<!DOCTYPE html>
<html>
<head>
<title>Title</title>
<%= stylesheet_link_tag 'application', media: 'all', 'data-turbolinks-track' => true %>
<%= javascript_include_tag 'application', 'data-turbolinks-track' => true %>
<%= csrf_meta_tags %>
</head>
<body>
<%= yield %>
</body>
</html>
Is there any way to fix this (I already install nodejs and restarted windows)
First, stylesheet_link_tag, returns a stylesheet link tag for the sources specified as arguments. It will check application.scss or application.css in your app/assets/stylsheets. Make sure application.css or application.scss exist in that specified path.
Second, if file exist, then reinstall gem using,
bundle install -f
answer
The way I fixed this was by getting rid of the require.tree in application.css and application.js
I have following html page home.html.erb:
<% provide(:title, 'Home') %>
<h1>Sample App</h1>
<p>
This is the home page for the
Ruby on Rails Tutorial
sample application.
</p>
And I have the following layout application.html.erb
<!DOCTYPE html>
<html>
<head>
<title><%= full_title(yield(:title)) %></title>
...
</head>
<body>
<%= yield %>
</body>
</html>
full_title() is a function that checks if there was a title passed as a parameter. If there was, it will place it into the HTML. If no parameter is given, it will place a base title into the HTML.
I'm assuming rails begins by going through the application.html.erb and then upon reaching <%= yield %>, it will embed the contents of home.html.erb into application.html.erb at that location, resulting in the following document:
<!DOCTYPE html>
<html>
<head>
<title><%= full_title(yield(:title)) %></title>
...
</head>
<body>
<% provide(:title, 'Home') %>
<h1>Sample App</h1>
<p>
This is the home page for the
Ruby on Rails Tutorial
sample application.
</p>
</body>
</html>
In the 4th line <%= full_title(yield(:title)) %>, the value "Home" is definitely being passed for :title, but the code <% provide(:title, 'Home') %> doesn't come until several lines later. Is Rails going backwards to accomplish this? How is this happening?
No it's don't. This is kind of string interpolation, this value will be replaced after every call of provide(:title, ...)
My understanding is that the home.html.erb is processed before the application layout. In other words, the view and helper are prepared and 'plugged-in' to the application layout before the whole thing is complete. I guess "going backwards" depends on which way you look at it / how it actually works. I'm still learning too, but it's not necessarily a 'top to bottom' sequence in terms of how the code is layed out on the page.
I am writing a mobile web application using Rails and jQuery mobile. I am reading all of my data at runtime from Amazon AWS S3 using HTTParty.
One of the screens that I need to render is just straight html, which can and usually does have images embedded into it which are hosted in the same folder on S3. This is where my problem is. I can easily pull in the html with HTTParty and use the html_safe option to render it, but the images don't render as they are relative path names. So I have been trying to find a way around this.
I have tried multiple things, but I have mainly been looking into using an html tag to get the images to point to the right location. The problem is that I cant specify a base tag and then have other links on the page, because they then use that same base and the links are not pointing atand the correct location. So I looked into framesets and frame and pointing the base tag only at the frame, which I believe I used correctly, but to no avail. I tried using but to no avail.
So basically I am looking for a way that I can set the base for relative path names in an html string that I read in from S3, if that wasn't clear. I am open to any suggestions! And thanks in advance for even reading and try to solve this very specific problem!
Oh and one more thing, when I look at the page with Firebug, the first line in the header is a base tag with href set to the current page. I can't find out where it is coming from but I am guessing rails is throwing it in there? I don't know if this matters since I then put another base tag below it with the yield :intro_base? Or is that one of my problems since there is a conflict there?
And then there was code:
My 'intro' method:
def intro
#intros = []
#app_config.intro_screens.each do |intro_screen|
intro_screen_response =
ApplicationController.get("#{#diandr_url}/#{intro_screen['filename']}.html")
#intros << intro_screen_response.body
end
#intros.reverse!
#intros_length = #intros.length
respond_to do |format|
format.html
end
end
My 'intro.html.erb' file:
<% page_num = params[:id].to_i %>
<% content_for :intro_base do %>
<base href="https://s3.amazonaws.com/our_bucket_name<%=#dir_url%>/" target="intro" />
<% end %>
<% content_for :mobile_header do %>
*some jQuery mobile paging and header stuff is in here, shouldn't matter*
<% end %>
<% content_for :mobile_content do %>
<!-- <iframe src=<%= #intros[page_num] %> height="100%" width="100%"> -->
<!-- <p> This browser does not support iframes </p> -->
<!-- </iframe> -->
<frameset cols="100%">
<frame name="intro" <%= #intros[page_num].html_safe %>
</frameset>
<% end %>
My layout's header:
<head>
<title> our Mobile App </title>
<meta name="viewport" content="width=device-width, initial-scale=1">
<!-- These are the jQuery Mobile scripts -->
<link rel="stylesheet" href="http://code.jquery.com/mobile/1.0/jquery.mobile-1.0.min.css" />
<script type="text/javascript" src="http://code.jquery.com/jquery-1.6.4.min.js"></script>
<script type="text/javascript" src="http://code.jquery.com/mobile/1.0/jquery.mobile-1.0.min.js">
</script>
<%= yield :intro_base %>
<%= stylesheet_link_tag "master" %>
<%= javascript_include_tag :defaults %>
<%= csrf_meta_tag %>
I am learning ruby on rails using aptana studio 3. I created a view hello.rhtml. When i run the view and see the source i get to see js files automatically included. Even if my rhtml file is empty for eg
hello world
Without the html markup, and if i see the source, i can see the entire markup from html doctype etc already present. How do i stop the inclusion of automatic markup?
Thanks
EDIT :
OK i create a hello.html.erb file. And put this code inside it
Hello
When i save and run the file, i get the output, but when i view source i get the following result.
<!DOCTYPE html>
<html>
<head>
<title>Demo</title>
<script src="/javascripts/prototype.js?1312799421" type="text/javascript"></script>
<script src="/javascripts/effects.js?1312799421" type="text/javascript"></script>
<script src="/javascripts/dragdrop.js?1312799421" type="text/javascript"></script>
<script src="/javascripts/controls.js?1312799421" type="text/javascript"></script>
<script src="/javascripts/rails.js?1312799421" type="text/javascript"></script>
<script src="/javascripts/application.js?1312799421" type="text/javascript"></script>
<meta name="csrf-param" content="authenticity_token"/>
<meta name="csrf-token" content="82LBP1pI5h0QzNW54PYSq/zdkS8kF4Z/nKSUHgKvv1g="/>
</head>
<body>
<html>
<head><title>Hello</title></head>
<body>
</body>
</html>
</body>
</html>
SO if you see, i get html inside html and when in browser my title shows "Demo" instead of "Hello"
UPdate :
Here is the content of application layout. And i now understand that, the code is coming from this layout.
<!DOCTYPE html>
<html>
<head>
<title>Demo</title>
<%= stylesheet_link_tag :all %>
<%= javascript_include_tag :defaults %>
<%= csrf_meta_tag %>
</head>
<body>
<%= yield %>
</body>
</html>
I am new to this, so what is the best practice and what code should be present in application_layout.html.erb. I would like all my view files to have its own html code.
Thanks a lot
Your view should have .html.erb extension not rhtml (That's a hang over from Rails 1.x).
Check out your application layout file. in the head section you'll see an entry for including javascript. Just comment that out and you js will not be included.
Which just leaves me with a question. What's the actual problem with what you have? Why does it bother you? Perhaps the answer to this will get you to the right question in order to find a more appropriate solution.
UPDATE
Have a close look at your application_layout.html.erb.
Can you post the contents of that?
This is not an error, this is the way Rails works!
Rails will generate views/layouts/application.html.erb for you, this is the basic template of the website. With this template, you don't have to copy and paste the same html declarations on each page you make.
Rails uses a convention called MVC which stands for Model, View, Controller. I suggest you read a bit more on how this works. Basically, <%= yield %> will insert the contents of your view, but you must tell Rails which url points to which view. Now you can have views/pages/home.html.erb, the contents of which might be..
<h1>Home Page</h1>
<p>Congratulations, you made a web page with Rails!</p>
And then in routes.rb
YourApp::Application.routes.draw do
match 'home' => 'pages#home'
end
When you go to http://localhost:3000/home, you should see your web page. If you look at the source code, you will see the output generated by Rails.
<!DOCTYPE html>
<html>
<head>
<title>Demo</title>
<%= stylesheet_link_tag :all %>
<%= javascript_include_tag :defaults %>
<%= csrf_meta_tag %>
</head>
<body>
<h1>Home Page</h1>
<p>Congratulations, you made a web page with Rails!</p>
</body>
</html>
This is definitely the proper way to use Rails. The goal is DRY (Don't Repeat Yourself). Michael Hartl has a wonderful tutorial and introduction to using Ruby on Rails. I would suggest anyone new to Ruby on Rails to start here: http://ruby.railstutorial.org/. If you have any questions about using Ruby on Rails or web design in general, I'd be happy to help. You can email me at draco#dragonstarwebdesign.com. Cheers and good luck to you!