1 files changed, 34 insertions, 0 deletions
diff --git a/app/models/list.rb b/app/models/list.rb
new file mode 100644
index 00000000000..eb87decdbc8
--- /dev/null
+++ b/app/models/list.rb
@@ -0,0 +1,34 @@
+class List < ActiveRecord::Base
+  belongs_to :board
+  belongs_to :label
+
+  enum list_type: { backlog: 0, label: 1, done: 2 }
+
+  validates :board, :list_type, presence: true
+  validates :label, :position, presence: true, if: :label?
+  validates :label_id, uniqueness: { scope: :board_id }, if: :label?
+  validates :position, numericality: { only_integer: true, greater_than_or_equal_to: 0 }, if: :label?
+
+  before_destroy :can_be_destroyed
+
+  scope :destroyable, -> { where(list_type: list_types[:label]) }
+  scope :movable, -> { where(list_type: list_types[:label]) }
+
+  def destroyable?
+    label?
+  end
+
+  def movable?
+    label?
+  end
+
+  def title
+    label? ? label.name : list_type.humanize
+  end
+
+  private
+
+  def can_be_destroyed
+    destroyable?
+  end
+end