Note that I cannot use Rails or Javascript.
Is there any way to repeat a block of HTML code using only Ruby / ERB?
In Rails I would do this:
<% content_for :mycontent do %>
some html code
that I want to capture
etc
<% end %>
Then, here, in the same template, I can reuse the block...
<%= content_for :mycontent %>
Multiple times...
<%= content_for :mycontent %>
Is there any equivalent without Rails?
Related
I'm using Sinatra and I'd like to include another erb file in one of my views but using a variable for the file name.
I was thinking something like this may work but I get an error saying no such file could be found.
<%= erb :'layout/nav/#{device_type}' %>
Currently I'm using the below switch statement to achieve the desired results but the above would be cleaner and less code.
<% case device_type
when 'mobile'%>
<%= erb :'layout/nav/mobile' %>
<% when 'tablet' %>
<%= erb :'layout/nav/tablet' %>
<% else %>
<%= erb :'layout/nav/desktop' %>
<% end %>
Thanks
Giles
I think that could work, you just need to use double quotes to interpolate strings.
Try
<%= erb :"layout/nav/#{device_type}" %>
I would like to extend ERB so every output tag - <%= %> - content is pre-processed before the result is rendered.
For example,
<%= 'test' %>
should now render
!test!
instead of
test
How can I do this ?
Something like this? (untested)
require 'erb'
template = File.read(template_file)
template.gsub!(/<%=(.*?)%>/, '!\1!')
erb = ERB.new(template)
result = erb.result
There is no straightforward way to do that. Perhaps you can define:
class String; def bang; "!#{self}!" end end
and do
<%= "test".bang %>
I have the following .erb view in a Sinatra app:
<% sessions.each do |session| %>
<%= session.balance_beginning %>
<%= session.balance_ending %>
<% end %>
It works as expected, displaying the beginning and ending balances recorded for each session. I would like to calculate the net balances from within the .erb file, but I can't figure out how to do it. I have tried variations of this:
<% sessions.each do |session| %>
<%= session.balance_ending - session.balance_beginning %>
<% end %>
That doesn't work. I receive the following error in Sinatra:
undefined method `-' for nil:NilClass
How do I do what I'm trying to do?
Right #Zabba, in this case I think you would add a method to your Session model so you could call session.net_balance.
Then in your balance_ending and balance_beginning methods you would want to handle nil, either raise an error or return zero if that is valid.
I am new to chef, ruby, ruby DSL, and erb. I come from python.
In a ruby erb template I want to do something like this.
<% if node[:monit][:server]=='nginx' -%>
ALL OF MY NGINX TEXT
<% end -%>
<% if node[:monit][:server]=='redis' -%>
ALL OF MY REDIS TEXT
<% end -%>
Clearly I am missing something about proper syntax.
Thanks
Try this:
<% if node[:monit][:server]=='nginx' -%>
nginx_text=<%= node[:nginx][:text] %>
<% end -%>
<% if node[:monit][:server]=='redis' -%>
redis_text=<%= node[:redis][:text] %>
<% end -%>
Code wrapped in <% %> or <% -%> is a statement that is evaluated. Code wrapped in <%= %> is code that is evaluated and the result is placed into the file. Harcoded strings dont have to be wrapped in erb tags if they are constant, but Ruby code must be wrapped in erb tags if you want the result of that code to go into your file
I have a small Sinatra app which generates html fragments for me from an ERB template.
How do I html_escape the output?
The <%=h somestring %> helper does not exist in Sinatra.
Rack::Utils includes a HTML escape method. http://www.sinatrarb.com/faq.html#escape_html
require 'CGI'
get '/html' do
erb :view
end
def h(html)
CGI.escapeHTML html
end
__END__
##view
<% File.open('my.html') do |f| %>
<%=h f.read() %>
<% end %>