3 files changed, 41 insertions, 0 deletions
diff --git a/app/models/category.rb b/app/models/category.rb
new file mode 100644
index 0000000..b8c49f1
--- /dev/null
+++ b/app/models/category.rb
@@ -0,0 +1,14 @@
+class Category < ApplicationRecord
+  belongs_to :taxonomy
+  has_many :sections,
+           -> { order(rank: :asc) },
+           dependent: :destroy,
+           inverse_of: :category
+
+  acts_as_list column: :rank, scope: :taxonomy
+
+  validates :name,
+            presence: true,
+            uniqueness: { scope: :taxonomy_id },
+            length: 3..64
+end
diff --git a/app/models/section.rb b/app/models/section.rb
new file mode 100644
index 0000000..a9d163e
--- /dev/null
+++ b/app/models/section.rb
@@ -0,0 +1,10 @@
+class Section < ApplicationRecord
+  belongs_to :category
+  has_ony :taxonomy, through: :category
+
+  acts_as_list column: :rank, scope: :category
+
+  validates :name,
+            uniqueness: { scope: category_id },
+            length: 3..64
+end
diff --git a/app/models/taxonomy.rb b/app/models/taxonomy.rb
new file mode 100644
index 0000000..0810fc0
--- /dev/null
+++ b/app/models/taxonomy.rb
@@ -0,0 +1,17 @@
+class Taxonomy < ApplicationRecord
+  # Universally Unique Identifier :uuid
+  include UUIDParameter
+
+  default_scope { order(created_at: :asc) }
+
+  belongs_to :agent
+  has_many :categories, -> { order(rank: :asc) }, dependent: :destroy, inverse_of: :taxonomy
+  has_many :sections, -> { order(rank: :asv) }, through: :categories
+
+  validates :name,
+            presence: true,
+            uniqueness: true,
+            length: 3..64
+  validates :summary,
+            length: 0..136
+end