Add model and views for bank accounts

app/models/bank_transaction.rb

@@ -0,0 +1,34 @@
+class BankTransaction < ActiveRecord::Base
+
+  # @!attribute external_id
+  #   @return [String] Unique Identifier of the transaction within the bank account.
+  # @!attribute date
+  #   @return [Date] Date of the transaction.
+  # @!attribute amount
+  #   @return [Number] Amount credited.
+  # @!attribute iban
+  #   @return [String] Internation Bank Account Number of the sending/receiving account.
+  # @!attribute reference
+  #   @return [String] 140 character long reference field as defined by SEPA.
+  # @!attribute text
+  #   @return [String] Short description of the transaction.
+  # @!attribute receipt
+  #   @return [String] Optional additional more detailed description of the transaction.
+  # @!attribute image
+  #   @return [Binary] Optional PNG image for e.g. scan of paper receipt.
+
+  belongs_to :bank_account
+  belongs_to :financial_link
+  belongs_to :supplier, foreign_key: 'iban', primary_key: 'iban'
+  belongs_to :user, foreign_key: 'iban', primary_key: 'iban'
+
+  validates_presence_of :date, :amount, :bank_account_id
+  validates_numericality_of :amount
+
+  # Replace numeric seperator with database format
+  localize_input_of :amount
+
+  def image_url
+    'data:image/png;base64,' + Base64.encode64(self.image)
+  end
+end