1 files changed, 68 insertions, 0 deletions
diff --git a/activerecord/lib/active_record/null_relation.rb b/activerecord/lib/active_record/null_relation.rb
new file mode 100644
index 0000000000..cf0de0fdeb
--- /dev/null
+++ b/activerecord/lib/active_record/null_relation.rb
@@ -0,0 +1,68 @@
+# frozen_string_literal: true
+
+module ActiveRecord
+  module NullRelation # :nodoc:
+    def pluck(*column_names)
+      []
+    end
+
+    def delete_all
+      0
+    end
+
+    def update_all(_updates)
+      0
+    end
+
+    def delete(_id_or_array)
+      0
+    end
+
+    def empty?
+      true
+    end
+
+    def none?
+      true
+    end
+
+    def any?
+      false
+    end
+
+    def one?
+      false
+    end
+
+    def many?
+      false
+    end
+
+    def to_sql
+      ""
+    end
+
+    def calculate(operation, _column_name)
+      case operation
+      when :count, :sum
+        group_values.any? ? Hash.new : 0
+      when :average, :minimum, :maximum
+        group_values.any? ? Hash.new : nil
+      end
+    end
+
+    def exists?(_conditions = :none)
+      false
+    end
+
+    def or(other)
+      other.spawn
+    end
+
+    private
+
+      def exec_queries
+        @records = [].freeze
+      end
+  end
+end