This question already has answers here:
Is there a way to list the available variables in an Ruby ERB template?
(1 answer)
Get all instance variables declared in class
(5 answers)
Closed 6 years ago.
I have been asked to work on a large project (already half-done). One file I'm working on starts with this:
<div class="table-responsive">
<table class="table">
<% if #incidents.present? %>
<br>
<thead>
I didn't know #incidents existed, until I saw it referenced. It made me wonder—what other instance variables are available for me to use? How would I know?
Because this is a big project with many files interacting, I don't want to just look at the controller or something like that, I want a way to log all instance variables available to me at a particular point in the code.
#foo = 3
instance_variables # => [:#foo]
Related
This question already has answers here:
Accessing a Session object from Razor _Layout.cshml
(2 answers)
Closed 7 years ago.
I am trying to add a session variable to html markup using MVC Razor, I tried this:
<div class="panel-body">
<p>It might suprise you to know that you can upgrade from #Session("CurrentProvider") to blah blah....</p>
</div>
I tried wrapping it in code tags and all sorts. How can I fix this?
Seems the answer is to append with ToString
#Session("CurrentProvider").ToString
This question already has answers here:
Preserve newline in text area with Ruby on Rails
(3 answers)
Closed 8 years ago.
It seems like rails treat every post with line break by change the line break into a space.
for example:
when I type
hi
hi
hi
in my form, what I get is just a simple "hi hi hi". How to change that?
I assume that in post form for description field you may have taken textarea
as Rustam commented you can use simple_format helper method: Two or more consecutive newlines(\n\n) are considered as a paragraph and wrapped in <p> tags.
You can use like
<%= simple_format(#post.description) %>
I hope this work out for you..
This question already has answers here:
Embedding Ruby code in HTML?
(3 answers)
Closed 9 years ago.
Is it possible to put Ruby code in the HTML page which has a extension ".rhtml"?
For example, I want to use a HTML form and then some Ruby code. Does it have to be encapsulated in the <% tags?
The file extension should be ".html.erb" for Rails 3 or above.
The Ruby code should be between <% %> for logic statements, or between <%= %> if you want to display the results of the code.
".erb" is what you are looking for. Rails uses ".erb" files and it is possible to embed Ruby code inside them.
Closed. This question does not meet Stack Overflow guidelines. It is not currently accepting answers.
Closed 9 years ago.
Questions concerning problems with code you've written must describe the specific problem — and include valid code to reproduce it — in the question itself. See SSCCE.org for guidance.
Questions asking for code must demonstrate a minimal understanding of the problem being solved. Include attempted solutions, why they didn't work, and the expected results. See also: Stack Overflow question checklist
Improve this question
I'm a relatively new Rails developer with a heavy Java/C# background and I'm trying to pass multiple time ranges from my view to my controller. For instance, the user could select the time range 9:00am to 11:00am as well as 2:00pm to 4:00pm. The first thing to came to mind was a list of times or a list of key value pairs so that I know when a time range starts and ends. I'm having trouble figuring out how to pass this information to my Rails controller though.
Is there an ideal Rails way of passing a list to a controller?
From Rails Guide http://guides.rubyonrails.org/action_controller_overview.html
request
GET /mytime?t[]=1&t[]=2&t[]=3
in view
<form method="GET" action="mytime">
<select multiple name="t[]">
<option value="1">1:00pm</option>
<option value="2">2:00pm</option>
<option value="3">3:00pm</option>
</select>
</form>
or
<form method="GET" action="mytime">
<input type="text" name="t[]">
<input type="hidden" name="t[]" value="11">
</form>
#in mytime_controller.rb
def index
params[:t] # return Array of values
end
You pass information from a view to a controller via http query string ('get') or form data ('post').
I would consider multi-select dropdown for this case.
Instead of dropdown i suggest you should create a cool for using some jquery plugin that will improve your application's user experience and yes create a rails form and submit it then you can have information in your controller.
Now is you are saving these selected time, that i think you should do then create a model if you haven't already and use form_for else your can use form_tag for your rails application.
Visit Here and find some time picker that suits you need.
This question already has answers here:
Closed 11 years ago.
Possible Duplicate:
Difference between -%> and %> in rails
I need to know what is the difference between <%= expression %> and <%= expression -%> on rails, please help me to make good foundation on Ruby On Rails
The '-%>' means, that no linebreak will be appended to the output of the expression. It's usefull if you want to control the amount of whitespace you have in the generated HTML but do not want to put all the code in a single line.
As mentioned before, the -%> is used to control output whitespace. I you're at all concerned with how your HTML looks, use HAML. HAML is way more clear and readable when coding and it generates clear, valid formatted HTML. No more forgotten close tags!
I say don't bother with '-%>' If you are using layouts and partials with your views it is difficult control the output anyway, things like indentation will likely be messed up. Just focus making your ERb look good and don't worry too much what the generated output looks like.