Add WorkItem model for Problem sheets and equivalent

db/migrate/20231007144031_create_work_items.rb

@@ -0,0 +1,11 @@
+class CreateWorkItems < ActiveRecord::Migration[7.1]
+  def change
+    create_table :work_items do |t|
+      t.string :title, null: false
+      t.references :course, null: false, foreign_key: true
+      t.datetime :due_date, null: false
+
+      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[7.1].define(version: 2023_10_06_210710) do
+ActiveRecord::Schema[7.1].define(version: 2023_10_07_144031) do
   # These are extensions that must be enabled in order to support this database
   enable_extension "plpgsql"
 
@@ -60,6 +60,16 @@ ActiveRecord::Schema[7.1].define(version: 2023_10_06_210710) do
     t.index ["lecture_id"], name: "index_tracked_time_entries_on_lecture_id"
   end
 
+  create_table "work_items", force: :cascade do |t|
+    t.string "title", null: false
+    t.bigint "course_id", null: false
+    t.datetime "due_date", null: false
+    t.datetime "created_at", null: false
+    t.datetime "updated_at", null: false
+    t.index ["course_id"], name: "index_work_items_on_course_id"
+  end
+
   add_foreign_key "recordings", "courses"
   add_foreign_key "tracked_time_entries", "lectures"
+  add_foreign_key "work_items", "courses"
 end