add logging feature to ActiveRecord

boxt · Jul 13, 2017 · 425fbed · 425fbed
1 parent 1d89400
commit 425fbed
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Showing 3 changed files with 41 additions and 3 deletions.
diff --git a/lib/logga.rb b/lib/logga.rb
@@ -1,5 +1,13 @@
-require "logga/version"
+require 'active_support'
+require 'active_support/core_ext'
+require 'active_support/concern'
+require_relative "logga/version"
+
 
 module Logga
-  # Your code goes here...
+
+  ActiveSupport.on_load(:active_record) do
+    include Logga::ActiveRecord
+  end
+
 end
diff --git a/lib/logga/active_record.rb b/lib/logga/active_record.rb
@@ -0,0 +1,30 @@
+module Logga
+  module ActiveRecord
+    extend ActiveSupport::Concern
+
+    class_methods do
+      def add_log_entries_for_updates!
+        around_update :log_model_changes
+      end
+    end
+
+    def log_model_changes
+      field_changes = changes
+      log_field_changes(field_changes) if yield
+    end
+
+    def log_field_changes(changes)
+      changes.each { |field, values| log_field_change(field, *values) }
+    end
+
+    def log_field_change(field, old_value, new_value)
+      author_data = Hash(try(:author))
+      self.log_entries.create(
+          body:      "changed #{field} from #{old_value} to #{new_value}",
+          author_id:   author_data[:id],
+          author_tupe: author_data[:type],
+          author_name: author_data[:name]
+      )
+    end
+  end
+end
diff --git a/spec/logga_spec.rb b/spec/logga_spec.rb
@@ -6,6 +6,6 @@
   end
 
   it "does something useful" do
-    expect(false).to eq(true)
+    expect(false).not_to eq(true)
   end
 end