What is the best way to generate a JSON object in Ruby on Rails without inadvertently creating a nested array structure?

Consider the scenario where I attempt to generate something similar to the following:

@data = Array.new

for i in 0..1
    j = 2
    @data << ["Id" => i, "Label" => j]
 end
respond_to do |format|
  format.html # index.html.erb
  format.json { render :json => @nodes }

This will produce the following JSON data:

[[{"Id":0,"Label":2}], [{"Id":1,"Label":2}]]

Subsequently, when accessing this data in Java Script, the syntax array[i][0].id is needed to retrieve the id. Ideally, it should simply be array[i].id for easier access.

Any recommendations or suggestions?

Answer №1

To create a hash in Ruby, use curly braces `{}` instead of square brackets `[]`. Avoid initializing variables with loops and pushes - it's not the most common way to write Ruby code. Here's an alternative approach:

@json = (0..1).map { |id| {"Id" => id, "Label" => 2} }
#=> [{"Id"=>0, "Label"=>2}, {"Id"=>1, "Label"=>2}]

Answer №2

Have you considered using

@json << {"Id" => x, "Label" => y}
?

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