exchange_rates.rb

[geekelo]

FILE

ActiveAdmin.register ExchangeRate do

  # config.sort_order = 'name_asc'

  menu parent: 'Currencies', label: 'Exchange Rates'

  # See permitted parameters documentation:
  # https://github.com/activeadmin/activeadmin/blob/master/docs/2-resource-customization.md#setting-up-strong-parameters
  #
  # Uncomment all parameters which should be permitted for assignment
  #
  permit_params :from, :to, :rate, :buy_rate, :sell_rate,
                :override, :override_rate, :override_buy_rate, :override_sell_rate,
                :override_label, :override_source, :override_updated_at
  #
  # or
  #
  # permit_params do
  #   permitted = [:from, :to, :rate]
  #   permitted << :other if params[:action] == 'create' && current_user.admin?
  #   permitted
  # end
end

[geekelo]

This code registers the ExchangeRate model with ActiveAdmin, enabling the management of exchange rates through the admin interface. Here's a breakdown of the key elements of the code:

1. Menu Configuration

• menu parent: 'Currencies', label: 'Exchange Rates':
  Places this resource under the "Currencies" menu in the ActiveAdmin interface and labels it as "Exchange Rates." This helps in organizing the admin interface, making it easier for administrators to find and manage exchange rates.

2. Permitted Parameters

• permit_params:
  This line ensures that the listed attributes of the ExchangeRate model can be modified through the ActiveAdmin interface. This is part of Rails' strong parameters feature, which protects against mass assignment vulnerabilities.

  permit_params :from, :to, :rate, :buy_rate, :sell_rate,
              :override, :override_rate, :override_buy_rate, :override_sell_rate,
              :override_label, :override_source, :override_updated_at

  These parameters likely correspond to fields in the ExchangeRate model:

  • from and to: Currencies being exchanged.
  • rate: The exchange rate between the two currencies.
  • buy_rate and sell_rate: Specific rates for buying and selling the currency.
  • override and related fields (override_rate, override_buy_rate, override_sell_rate, override_label, override_source, override_updated_at): Fields that allow for the manual override of rates and provide additional metadata about the override (e.g., source, label, and timestamp).

3. Commented Configuration

• # config.sort_order = 'name_asc':
  This commented-out line suggests that there was an option to sort the ExchangeRate records by name in ascending order. This line is currently not active, meaning the default sorting order is applied.

4. Additional Parameter Customization

• permit_params do ... end:
  This is a commented-out alternative method for specifying permitted parameters. It conditionally permits certain parameters based on the action being performed (e.g., only allowing additional parameters when creating a record and if the current user is an admin).

  permit_params do
  permitted = [:from, :to, :rate]
  permitted << :other if params[:action] == 'create' && current_user.admin?
  permitted
  end

Summary

This configuration sets up an admin interface for managing exchange rates in your system. By defining which parameters are permitted for modification, it ensures that the system is secure while still being flexible for administrators to manage the exchange rates, including the ability to override rates and specify additional details about those overrides.