CODEWITHSUNDEEP
rubypostsinatra
eckes
eckes

Reputation: 67087

How do I read unknown post data with Sinatra?

Say I've got that application that stores it's settings in a database.

For modifying settings, I just print each setting into a form using slim:

Sinatra part:

get '/settings' do
  @settings = Setting.all
  slim :showsettings
end

Slim part:

@@ showsettings
h1 Settings
form action="/settings" method="POST"
  table
    - @settings.each do |setting|
      tr
        td
          label for="#{setting.name}" #{setting.name}
        td
          input type="text" name="#{setting.name}" value="#{setting.value}"
  input.button type="submit" value="Update Settings"

When I submit the form, I get back to /settings and want to process the POST request. I know that all of the parameters are stored in the params variable.

If I print params, I receive the following string:

["name1", "value1"]["name2", "value2"]["name3", "value3"]["name4", "value4"]

How do I process all of the submitted parameters when I don't know how they are named? Of course, I could hard-code the parameter names into the code but this would be hard to maintain.

Edit:
What I'm basically looking for is something like the keys function in Perl which I could use for something like for my $key ( keys %hash )...

Upvotes: 0

Views: 283

Answers (2)

matt
matt

Reputation: 79743

You can iterate over the entries in a Hash directly with each, you don’t necessarily need to use keys:

post '/settings' do
  params.each do |key, value|
    Setting.get(key).update(:value => value)
  end
end

Upvotes: 2

eckes
eckes

Reputation: 67087

Found it myself:

post '/settings' do
  params.keys.each do |key|
    s = Setting.get(key)
    s.update( :value => params[key])
  end
end

Upvotes: 1

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