Add latest changes from gitlab-org/gitlab@master

1 files changed, 45 insertions, 0 deletions

diff --git a/app/models/concerns/ignorable_columns.rb b/app/models/concerns/ignorable_columns.rb
new file mode 100644
index 00000000000..744a1f0b5f3
--- /dev/null
+++ b/app/models/concerns/ignorable_columns.rb
@@ -0,0 +1,45 @@
+# frozen_string_literal: true
+
+module IgnorableColumns
+  extend ActiveSupport::Concern
+
+  ColumnIgnore = Struct.new(:remove_after, :remove_with) do
+    def safe_to_remove?
+      Date.today > remove_after
+    end
+
+    def to_s
+      "(#{remove_after}, #{remove_with})"
+    end
+  end
+
+  class_methods do
+    # Ignore database columns in a model
+    #
+    # Indicate the earliest date and release we can stop ignoring the column with +remove_after+ (a date string) and +remove_with+ (a release)
+    def ignore_columns(*columns, remove_after:, remove_with:)
+      raise ArgumentError, 'Please indicate when we can stop ignoring columns with remove_after (date string YYYY-MM-DD), example: ignore_columns(:name, remove_after: \'2019-12-01\', remove_with: \'12.6\')' unless remove_after =~ Gitlab::Regex.utc_date_regex
+      raise ArgumentError, 'Please indicate in which release we can stop ignoring columns with remove_with, example: ignore_columns(:name, remove_after: \'2019-12-01\', remove_with: \'12.6\')' unless remove_with
+
+      self.ignored_columns += columns.flatten # rubocop:disable Cop/IgnoredColumns
+
+      columns.flatten.each do |column|
+        self.ignored_columns_details[column.to_sym] = ColumnIgnore.new(Date.parse(remove_after), remove_with)
+      end
+    end
+
+    alias_method :ignore_column, :ignore_columns
+
+    def ignored_columns_details
+      unless defined?(@ignored_columns_details)
+        IGNORE_COLUMN_MUTEX.synchronize do
+          @ignored_columns_details ||= superclass.try(:ignored_columns_details)&.dup || {}
+        end
+      end
+
+      @ignored_columns_details
+    end
+
+    IGNORE_COLUMN_MUTEX = Mutex.new
+  end
+end