In my index.js.erb
$(".div").html("<%= escape_javascript(render('something/some_form')) %>");
in some_form.htm.erb i have condition which is not working
<% if #variable1 == #variable2 %>
show something1
<% else %>
show something2
<% end %>
For some reason when my js.erb renders this partial i always have show something2. So <% if #variable1 == #variable2 %> condition not working
variable1 and variable2 defined in my controller
How can i make this equal condition work?
Controller variables are not visible within partials. Please, read the official documentation on partials
You need to pass those variables along to the partial via the locals:
//e.g locals: {variable1: #variable1, variable2: #variable2}
$(".div").html("<%= escape_javascript(render('something/some_form', locals: {variable1: #variable1, variable2: #variable2})) %>");
some_form
<% if variable1 == variable2 %>
show something1
<% else %>
show something2
<% end %>
Related
I have a problem with "if":
<%= print 'Hi American people' if #people.country == "Usa" %>
When I preview my app, I cannot see the message "hi american people": the field is blank.
Using print will print to the console and won't actually display anything in your HTML file.
Below, we can use an if "block". In the "block", you can put any HTML within.
<% if #people.country == "Usa" %>
Hi American people
<% end %>
For example, I can do the following, adding multiple HTML elements within. They will only display if the conditional passes:
<% if #people.country == "Usa" %>
<span>Hi American people</span>
<p>Today is a good day..</p>
<% end %>
I am trying to create a loop only if index is defined. But it looks like
erb can't handle a loop within a if clause.
<% if(#index) %>
index <% index_files.each do |i| %> <%= i %> <% end %>;
<% end %>
Expected Result was:
index index.html index.php
or
""
Syntax error i got:
My flat approach failed as expected:
<% if(#index_files) %> try_files <% end %> <% index_files.each do |i| %> <%= i %> <% end %>
I defined index_files as undef => broke the each loop
I defined an empty array => since an empty array is defined it didn't work.
Maybe I can check the length of index_files?
Or do I need a complete different way to solve the problem?
I'm doing the same and it works for me, also for nginx ;).
For example:<% if #proxy_ignore_headers %> proxy_ignore_headers<% proxy_ignore_headers.each do |i| -%> <%= i %><% end -%>;
That works like a charm, the only difference with you is using () for the if condition, but I bet puppet supports (). It's weird, maybe you had pressed a bad combination generating a character that can't be seen but it's messing with your code, try writing all from scratch just in case.
You can see the full template here
Good luck
At first glance you just need to change
index_files.each
to
#index_files.each
I have a form that I am trying to build to edit multiple records. It's complicated, doesn't map straight to the database, and there can be any number of records. I have the code written so all of the data is passed to the view as a hash. Like this:
#formdata = {"datafield_1"=>"value_1", "datafield_2"=>"value_2"}
What I want to do is to create something like:
f.textfield :datafield_1
f.textfield :datafield_2
f.textfield :datafield_3
etc. etc. etc.
But I don't know how to pass the index of my for loop into the variable name. In short, how do I do :datafield_i where i is my index?
<% %w(1 2 3).each do |i| %>
<%= f.textfield(:"datafield_#{i}") -%>
<% end %>
or
<% #formdata.keys.each do |datafield| %>
<%= f.textfield(datafield.to_sym) -%>
<% end %>
Say I have a block like this:
<% #help_sections.each do |section| %>
<li><%= section.name %></li>
<% end %>
But on the last record returned, I want to do something else, e.g. applying a class to the li that's there:
<li class="last"><%= section.name %></li>
How do I do that in the most DRY way?
Thanks.
Edit1:
I imagine I would simply use an if statement and the last ruby method, but not sure how to do that within the block? I know that if I just wanted the last element in that array, I could just do #help_sections.last, but that doesn't make sense within the confines of a Ruby block.
The most DRY way is to use CSS instead. Instead of e.g. this:
li.last { color: red; }
..and then cluttering up your markup with an extra CSS class, just use the :last-child pseudoselector, i.e.:
li:last-child { color: red; }
Then you don't have to change anything in your view. This is supported in all modern browsers including IE9.
Try each_with_index:
<% #help_sections.each do |section, index| %>
<li <%= "class='last'" if index == (#help_sections.length-1) %>><%= section.name %></li>
<% end %>
DRY is a good idea in general, but don't kill yourself to keep from repeating a li.
<% #help_sections[0...-1].each do |section| %>
<li><%= section.name %></li>
<% end %>
<li class="last"><%= #help_sections.last.name %></li>
You could either do something like
<% #help_sections.count.times do |i| %>
<%= #help_sections[i].name %>
<%= do_something if #help_sections.count == i - 1 %>
<% end %>
This old answer might help (Tell the end of a .each loop in ruby). Basically, you can use:
<% #help_sections.each_with_index do |section, index| %>
<% if index == #help_sections.size - 1 %>
<li class="last">
<% else %>
<li>
<% end %>
<%= section.name %></li>
<% end %>
If you use each_with_index instead of plain each, the block will also be passed the index of the current element within the collection. You can then compare that to #help_sections.length.
E.g.
<% #help_sections.each_with_index do |section, i| %>
<li<% concat " class='last'" if i == #help_sections.length - 1 %>><%= section.name %></li>
<% end %>
In general cases not covered by smart CSS selectors, you can define a convenient helper method, which would provide each iterated element with its context within the collection. Like this one:
def each_with_context enum
length = enum.count
enum.each_with_index do |elem, i|
context = {
:first => i == 0,
:last => i == length - 1,
:even => i.even?,
:odd => i.odd?,
:middle => i == length / 2
}
yield elem, context
end
end
And then use it within HAML view like this:
-each_with_context(#help_sections) do |section, context|
%li{:class => context[:last] ? 'last' : nil}
=section.name
I have a controller with an API request showing all my Google Docs.
feed = client.get('http://docs.google.com/feeds/documents/private/full').to_xml
feed.elements.each('entry') do |entry|
puts 'title: ' + entry.elements['title'].text
puts 'type: ' + entry.elements['category'].attribute('label').value
puts 'updated: ' + entry.elements['updated'].text
puts 'id: ' + entry.elements['id'].text
# Extract the href value from each <atom:link>
links = {}
entry.elements.each('link') do |link|
links[link.attribute('rel').value] = link.attribute('href').value
end
puts links.to_s
end
So, I can see the results in my console but how do I get them into my view?
I tried with something like this, but that doesn't work (I changed my variable in the controller to an accessor of course)
<% feed.elements.each('entry') do
|entry| %> <%
entry.elements['title'].text %> <%
end %>
First, in your controller, make feed an instance variable. IE: it should be:
#feed = client.get..... instead of feed = client.get....
If that doesn't fix it... I don't know your API for sure, but I suspect you may need to be using:
<% #feed.elements.each('entry') do |entry| %> <% entry['title'] %> <% end %>
Note: entry['title'] instead of entry.elements['title'].text
What your current code indicates is that the feed is structured like this:
feed.elements[0].elements['attr'].text, when it's probably just feed.elements[0]['attr']
Does that make sense? Try that and see what happens.
If that doesn't work, just put: debug(#feed) in your view and copy and paste it to the end of your question. That'll help us figure out the right way to access this info.
Problem solved. Because I use 'puts' in the controller to show the content of the feed in the console I also have to change that for the view. Of course, puts is equal to <%= ... %>.
<ul>
<% #feed.elements.each('entry') do |entry| %>
<li><%= 'title: ' + entry.elements['title'].text %></li>
<% end %>
</ul>