How do I insert variable values into HTML tags in ERB templates?

Question

I have a partial like:

<% office.map do |o| %>
   <input id='city' name='company[company_office][0][city]' value=.... type='text' />
<% end %>

How can I insert a value like o.office into an attribute? value="#{o.office}" does not work.

Solution 1

<% office.map do |o| %>
   <input id='city' name='company[company_office][0][city]' value='<%= o.office %>' type='text' />
<% end %>

or you could use the form helpers for that

Solution 2

Use embedded ruby(erb) tags,

<%= o.office %>

The only time you'd use #{o.office} is when you're not using erb. In a helper method for example and you want to use your ruby in a string. But when you're in an html.erb file, you have to use the erb tags.

Comments

[maxfry]

no, form helpers i can't use, because i have specific name. Big thanks, i don't know, that i want to write quotes )

[ardavis]

<%= content_tag :input, :id => "city", :name => "company[company_office][0][city]", :value => "#{o.office}", :type => "text" %> Could do it that way I suppose.

[corroded]

what do you mean specific name? also, traversing to a loop and creating inputs with the same id is not recommended. you should make your id and name dynamic.

[lavapj]

Agree with top voted answers. <%= o.office %> Just wanted to add that it's important for beginners to recognize distinction btwn erb tags with and without equals sign. <%= ... %> versus <% ... %> Tag with an equals sign indicates that enclosed code is an expression and renders code as a string. Used to embed line of code into template of to display contents of a variable. Tags without the equals sign commonly used for including loops / conditional logic in Ruby.