rails, How to build table in helper using content_tag?

Question

I defined function in application helper:

def display_standard_table(columns, collection = {})    
  content_tag :table do      
    concat content_tag :thea         


        

Answer 1

Actually you are only missing a plus between content tags, you can find a similar question here

Rails- nested content_tag

The problem with this, is that maybe you will get a syntax error because of the way you are using the blocks, if you use a "{}" instead of "do end" statements you are going to be Ok.

Here (Change to the way the block is handled) you can find an example and a workaround in the case you use Rails 3 because apparently Rails 3 ignore the result of the collect statement when is inside of the content tag.

Answer 2

def display_standard_table(columns, collection = {})

 thead = content_tag :thead do
   content_tag :tr do
    columns.collect {|column|  concat content_tag(:th,column[:display_name])}.join().html_safe
   end
 end

 tbody = content_tag :tbody do
  collection.collect { |elem|
    content_tag :tr do
      columns.collect { |column|
          concat content_tag(:td, elem.attributes[column[:name]])
      }.to_s.html_safe
    end

  }.join().html_safe
 end

 content_tag :table, thead.concat(tbody)

end

Answer 3

Adding '.join().html_safe' to the end of each collect section. That's what worked for me.

  collection.collect { |elem| 
    concat content_tag(:tr, columns.collect { |column|
      content_tag(:td, elem.attributes[column[:name]])
  })
}.join().html_safe

Answer 4

It's the missing concat in your :tr related content_tag.

Update

As for the escaping, take a look at the api docs for content_tag. You need to specify not to escape it. Of course, you'd be responsible for escaping the stuff inside the tags that you want escaped in that case.

Answer 5

See the railscast about that : http://railscasts.com/episodes/208-erb-blocks-in-rails-3 all is explain how you manage your block helper in rails 3