Ruby & Rails - conditional count within block

Question

This is a simple question but I can't figure out as I am new to rails.

My controller has a @neighborhoods variable which contains neighborhood records for each Business in the @businesses variable (each business has_one neighborhood)

In my view, I want to print out:

Each unique neighborhood name
How many of each unique neighborhood name (can be multiple since it is taken from the @businesses variable)

Currently I have:

<% @neighborhoods.uniq{|x| x.name}.each do |neighborhood| %>
   <p><%= neighborhood.name %></p>
   <%= @neighborhoods.where{name = neighborhood}.count %>
<% end %>

I know the above code is wrong, but it illustrates what I am trying to do. How can I achieve this?

Try validating from your model. validates :neighborhood, :uniqueness => {:scope => :name} — coletrain
– coletrain, Commented Jun 2, 2013 at 2:30
I Suppose it is @neighborhoods.where{name = neighborhood}.count — fotanus
– fotanus, Commented Jun 2, 2013 at 3:12
That’s a lot of logic for a view, try moving it to a model or service object. — Andrew Marshall
– Andrew Marshall, Commented Jun 2, 2013 at 4:05

Amit Kumar Gupta · Accepted Answer · 2013-06-02 03:43:40Z

3

<% @neighborhoods.group_by(&:name).each do |name, neighbourhoods| %>
  <p><%= name %></p>
  <%= neighbourhoods.count %>
<% end %>

edited Jun 2, 2013 at 3:43

answered Jun 2, 2013 at 3:18

Amit Kumar Gupta

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1 Comment

Zephyr4434 Over a year ago

Thanks, but I got this error: both block arg and actual block given

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