Add group description field

db/migrate/20251203161006_create_groups.rb

@@ -2,6 +2,7 @@ class CreateGroups < ActiveRecord::Migration[8.0]
   def change
     create_table :groups do |t|
       t.string :name, null: false
+      t.text :description
       t.belongs_to :creator, null: false, foreign_key: true
       t.timestamps
     end

spec/models/group_spec.rb

@@ -20,4 +20,9 @@ RSpec.describe Group do
     group.members << alice
     expect(group.members).to include alice
   end
+
+  it "can have a description" do
+    group = create(:group, description: "details go here")
+    expect(group.description).to eq "details go here"
+  end
 end