create custom html helpers in ruby on rails

Question

I've starting programming on ASP.NET MVC Framework a year ago. Recently. I've learning Ruby On Rails Framework There is "custom html helper" feature in ASP.NET MVC So I can create my own html helper

<%= Html.MyOwnHtmlHelper() %>

I've learned that there is html helpers in Ruby such as

<% text_area %>

which render at html

I have a question. Can I create my own html helper for rendering my own html?

Simone Carletti · Accepted Answer · 2010-09-26 08:30:39Z

66

To create a new helper:

choose a name for the helper file, for instance tags_helper.rb
create the file in the /app/helpers directory
create a module according to the file name. In this case
```
module TagsHelper
end
```

define your helper as method

module TagsHelper
  def hello_world(name)
    "hello #{name}"
  end
end

Now you can use the hello_world helper method in your view.

answered Sep 26, 2010 at 8:30

Simone Carletti

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2 Comments

Colin Pear Over a year ago

Does an HTML helper have to be a Module? Can it be a class?

Gal Over a year ago

I know this is old but: to use the built in rails mechanism and have it be automatically available, it has to be a module in the helper folder and possibly named correctly. You could use a plain old ruby object (a class) - and then you just have to call it with its full name and <%=HelloWorldHelper.new.hello_world_tag%> but the Helper mechanism is simpler and is a convention, and you would just call <%=hello_world_tag%>

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