fiat_rates.rb

[geekelo]

FILE

ActiveAdmin.register FiatRate do

  config.sort_order = 'date_desc'

  menu parent: 'Currencies', label: 'EU 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 :base_currency, :currency, :rate, :source, :date
  #
  # or
  #
  # permit_params do
  #   permitted = [:base_currency, :currency, :rate, :source, :date]
  #   permitted << :other if params[:action] == 'create' && current_user.admin?
  #   permitted
  # end

end

[geekelo]

This ActiveAdmin configuration sets up an admin interface for managing FiatRate records. Here's an overview of how it works:

1. Menu Configuration

• menu parent: 'Currencies', label: 'EU Rates':
  This places the FiatRate resource under the "Currencies" menu in the ActiveAdmin interface and labels it as "EU Rates." This makes it easy for administrators to find and manage fiat exchange rates specific to the Euro or European currencies.

2. Sort Order Configuration

• config.sort_order = 'date_desc':
  This configures the default sort order for the FiatRate records, sorting them by the date attribute in descending order. This typically ensures that the most recent rates are displayed first, which is often useful for administrators when viewing or managing exchange rates.

3. Permitted Parameters

• permit_params :base_currency, :currency, :rate, :source, :date:
  This line specifies which parameters of the FiatRate model can be modified through the ActiveAdmin interface. By allowing only these parameters, it ensures that only safe and necessary attributes can be changed by administrators.

  The parameters include:

  • base_currency: The base currency against which the rate is measured (e.g., EUR).
  • currency: The target currency for the exchange rate (e.g., USD).
  • rate: The exchange rate value.
  • source: The source of the exchange rate data.
  • date: The date on which the exchange rate applies.

4. Commented Configuration

• # permit_params do ... end:
  This commented-out block shows an alternative way to define permitted parameters. It demonstrates how you can conditionally permit parameters based on certain criteria, such as whether the current action is create and whether the current user is an admin.

  permit_params do
  permitted = [:base_currency, :currency, :rate, :source, :date]
  permitted << :other if params[:action] == 'create' && current_user.admin?
  permitted
  end

  This can be useful if you need more control over which parameters can be assigned, based on the specific context of the action.

Summary

This configuration is designed to manage fiat currency exchange rates, particularly those related to the Euro or European currencies. It organizes the FiatRate resource under the "Currencies" menu with a focus on "EU Rates," ensures that the most recent rates are displayed first, and securely defines which parameters can be modified by administrators. The flexibility provided by the commented-out block allows for more advanced configuration if needed.