Custom Settings Form in ActiveAdmin - ruby-on-rails

Question

I'm using rails-settings by Squeegy from https://github.com/Squeegy/rails-settings as well as Activeadmin. What I'm trying to accomplish is making a form in ActiveAdmin that I can let the site admin change the settings for the site, which take a command line syntax of:
Setting.foo = "bar"
Setting.site_title = "My Awesome Site!"
Setting.max_users = 35
I really don't think I've got too far, but I'm already stuck. I'm up to the point of having a custom ActiveAdmin form made:
ActiveAdmin.register_page "Settings" do
action_item do
link_to "View Site", "/"
end
content do
form do |f|
#Inputs for Settings
end
end
end
But I don't even know how to begin laying out the form to directly access the Settings model, or how to make a custom controller to handle the input. I suppose if I could get the input sent to a controller that I could make, I'd be just fine.

Answer 1

This is very simple to do with ActiveAdmin.
Lets say your settings class is Settings :
ActiveAdmin.register_page "Settings" do
content do
table :class => 'settings' do
thead do
th 'Setting'
th 'Value'
th ''
end
Settings.all.each do |key, val|
tr do
td strong key
td val
td do
link_to "delete", admin_settings_delete_path( :key => key ), :method => :post
end
end
end
tr do
form :action => admin_settings_create_path, :method => :post do
td do
input :name => 'key'
end
td do
input :name => 'val'
end
td do
input :type => 'submit', :value => 'Add'
end
end
end
end
end
page_action :create, :method => :post do
Settings[params[:key]] = params[:val]
redirect_to :back, :notice => "#{params[:key]} added"
end
page_action :delete, :method => :post do
Settings.destroy params[:key]
redirect_to :back, :notice => "#{params[:key]} deleted"
end
end
Of course you'll need to add some CSS and maybe some validations but you have your settings page.
Edit:
Note that I wrote this for rails-settings-cached, not rails-settings, but my quick search led here so I guess this could still help someone.

Answer 2

I don't think you want your site's form to directly change the settings in ActiveAdmin, I would ...
Create a new table, eg. adminsettings and add fields for each of the settings you want to store for instance site_title, alternatively you could use each row for a setting which means you can add new settings in the future without changing the database
Put together a form in Activeadmin to maintain your settings
Add some functions to your model to grab the settings so you can do something like ..
Setting.site_title = Adminsetting.getsitetitle
You could be clever with your model method and use the method_missing facility so you need the least amount of code to get a setting ...
class << self
def method_missing(method, *args, &block)
setting = Adminsetting.where(:code => method.to_s).first
if setting
return setting.content
else
return super(method, *args, &block)
end
end
Perhaps you could package this into a Gem as it could be a useful thing for others.