Bazaar with buy orders, sell orders, and order cancellation

1 files changed, 18 insertions, 0 deletions

diff --git a/app/models/concerns/destroy_if_zero_quantity.rb b/app/models/concerns/destroy_if_zero_quantity.rb
new file mode 100644
index 0000000..6fdfb3e
--- /dev/null
+++ b/app/models/concerns/destroy_if_zero_quantity.rb
@@ -0,0 +1,18 @@
+module DestroyIfZeroQuantity
+  extend ActiveSupport::Concern
+
+  included do
+    after_save :destroy_if_zero_quantity
+  end
+
+  private
+    def destroy_if_zero_quantity
+      byebug
+      if self.quantity == 0
+        destroy
+      elsif self.quantity < 0
+        # TODO: Can improve this (at the least, with reporting, later).
+        raise ItemQuantityError
+      end
+    end
+end