I am using Ruby on Rails 3.2.13 and I would like to render partial templates for an array of objects within a helper method. That is, in my helper file I have:
def render_articles(articles)
articles.each do |article|
render :partial => ...
end
end
The above method, however, doesn't return partial templates but an array. How can I properly render those?
The each block you have doesn't return the contents of the block but rather returns the array itself. You need a mechanism to return the contents.
A method:
def render_articles(articles)
html = ""
articles.each do |article|
html += render :partial => ...
end
html.html_safe
end
Another method:
def render_articles(articles)
articles.inject("") { |html, article| html + render :partical =>... }.html_safe
end
html_safe method. But, generally speaking, is it dangerous to use the html_safe method?
html_safe. It's not dangerous in this context.
articles.map { |article| render partial: ... }.join('').html_safeinject and map)?#map is slightly more efficient, but only with high computation : gist.github.com/oelmekki/6f5fcc120e052a84ffdd . This should not make any difference in your case (unless you generate 10 000 partials, and then that would not be your worse problem :) )
render :partial => '...', :collection => articles?