add zone model

app/models/zone.rb

@@ -0,0 +1,13 @@
+# == Schema Information
+#
+# Table name: zones
+#
+#  id         :bigint           not null, primary key
+#  acronym    :string
+#  label      :string
+#  created_at :datetime         not null
+#  updated_at :datetime         not null
+#
+class Zone < ApplicationRecord
+  validates :acronym, presence: true, uniqueness: true
+end

db/migrate/20211127133549_create_zones.rb

@@ -0,0 +1,10 @@
+class CreateZones < ActiveRecord::Migration[6.1]
+  def change
+    create_table :zones do |t|
+      t.string :acronym
+      t.string :label
+
+      t.timestamps
+    end
+  end
+end

db/schema.rb

@@ -10,7 +10,7 @@
 #
 # It's strongly recommended that you check this file into your version control system.
 
-ActiveRecord::Schema.define(version: 2021_11_26_150915) do
+ActiveRecord::Schema.define(version: 2021_11_27_133549) do
 
   # These are extensions that must be enabled in order to support this database
   enable_extension "plpgsql"
@@ -823,6 +823,13 @@ ActiveRecord::Schema.define(version: 2021_11_26_150915) do
     t.index ["procedure_id"], name: "index_without_continuation_mails_on_procedure_id"
   end
 
+  create_table "zones", force: :cascade do |t|
+    t.string "acronym"
+    t.string "label"
+    t.datetime "created_at", precision: 6, null: false
+    t.datetime "updated_at", precision: 6, null: false
+  end
+
   add_foreign_key "active_storage_variant_records", "active_storage_blobs", column: "blob_id"
   add_foreign_key "archives_groupe_instructeurs", "archives"
   add_foreign_key "archives_groupe_instructeurs", "groupe_instructeurs"