Rails通过哈希循环

Question

A really simple question but I just can't seem to get it working.

There is only one Property included below but there could be more than one within Properties . How can I iterate through this hash and display just the Name of each Property ?

{"GetPropertiesResponse"=>{"Properties"=>{"Property"=>{"Breakfast"=>"IN", "Country"=>"GB", "Currency"=>"GBP", "Id"=>"1834", "Name"=>"Hotel Name"}}}}

I've tried this in my view:

<% @json['GetPropertiesResponse']['Properties']['Property'].each do |property| %>
  <%= property['Name'] %>
<% end %>

I'm getting this error:

no implicit conversion of String into Integer

Answer 1

If you are saying there might be more than one property hash then this should work:

<% @json['GetPropertiesResponse']['Properties'].each do |property, value| %>
  <%= value['Name'] %>
<% end %>

Answer 2

I would use #each_value on this hash since you don't appear to be using the keys

<% @json['GetPropertiesResponse']['Properties'].each_value do |value| %>
  <%= value['Name'] %>
<% end %>

Should work. Note that the second line is <%= value['Name'] %> and not <%= property['Name'] %>

PS On a different note, I don't know why you're using the key "Property" inside of your Properties hash. That just seems like a good way to confuse yourself in exactly this way. Your keys within the Properties hash should be something unique to the property they describe. Since each will be a property, the string "Property" doesn't help describe or differentiate.