Add option to create a financial_link when creating financial_transaction

If multiple financial transaction belong to a bank transaction, it
is sometimes easier to create them as a collection and add the bank
transaction instead of adding all financial transaction to a link
created via a bank transaction.

app/controllers/finance/financial_transactions_controller.rb

@@ -56,6 +56,11 @@ class Finance::FinancialTransactionsController < ApplicationController
   def create_collection
     raise I18n.t('finance.financial_transactions.controller.create_collection.error_note_required') if params[:note].blank?
     type = FinancialTransactionType.find_by_id(params[:type_id])
+    financial_link = nil
+
+    ActiveRecord::Base.transaction do
+      financial_link = FinancialLink.new if params[:create_financial_link]
+
       params[:financial_transactions].each do |trans|
         # ignore empty amount fields ...
         unless trans[:amount].blank?
@@ -66,10 +71,15 @@ class Finance::FinancialTransactionsController < ApplicationController
             note += " (#{amount})"
             amount -= ordergroup.financial_transaction_class_balance(type.financial_transaction_class)
           end
-        ordergroup.add_financial_transaction!(amount, note, @current_user, type)
+          ordergroup.add_financial_transaction!(amount, note, @current_user, type, financial_link)
         end
       end
-    redirect_to finance_ordergroups_url, notice: I18n.t('finance.financial_transactions.controller.create_collection.notice')
+
+      financial_link.try(&:save!)
+    end
+
+    url = financial_link ? finance_link_url(financial_link.id) : finance_ordergroups_url
+    redirect_to url, notice: I18n.t('finance.financial_transactions.controller.create_collection.notice')
   rescue => error
     flash.now[:alert] = error.message
     render action: :new_collection

app/views/finance/financial_transactions/new_collection.html.haml

@@ -56,6 +56,11 @@
   %p
     = link_to t('.new_ordergroup'), '#', 'data-add-transaction' => true, class: 'btn'
     = link_to t('.add_all_ordergroups'), '#', 'data-add-all-ordergroups' => true, class: 'btn'
+  - if BankAccount.any?
+    %p
+      %label
+        = check_box_tag :create_financial_link, true, params[:create_financial_link]
+        = t('.create_financial_link')
   .form-actions
     = submit_tag t('.save'), class: 'btn btn-primary'
     = link_to t('ui.or_cancel'), finance_ordergroups_path

config/locales/de.yml

@@ -838,6 +838,7 @@ de:
         title: Neue Transaktion
       new_collection:
         add_all_ordergroups: Alle Bestellgruppen hinzufügen
+        create_financial_link: Erstelle einen gemeinsamen Finanzlink für die neuen Transaktionen.
         new_ordergroup: Weitere Bestellgruppe hinzufügen
         save: Transaktionen speichern
         set_balance: Setze den Kontostand der Bestellgrupppe auf den eingegebenen Betrag.

config/locales/en.yml

@@ -863,6 +863,7 @@ en:
         title: New transaction
       new_collection:
         add_all_ordergroups: Add all ordergroups
+        create_financial_link: Create a common financial link for the new transactions.
         new_ordergroup: Add new ordergroup
         save: Save transaction
         set_balance: Set the balance of the ordergroup to the entered amount.