Commit updated db/schema.rb (#225)

Rails 4.2 introduced `force: :cascade` and uses that by default when
dumping the schema[1] to make it possible to reload a schema when
foreign keys are in place, so we now get a slightly different dump
format. There are also other trivial differences.

Commit this new version to reduce diff's when the schema is dumped.

Note that there are additional differences when dumping databases
created pre-4.2 (to do with `limit: 255`, see #225 for discussion),
but they will be addressed separately.

[1] https://guides.rubyonrails.org/v4.2/4_2_release_notes.html#active-record-notable-changes

db/schema.rb

@@ -16,7 +16,7 @@
   # These are extensions that must be enabled in order to support this database
   enable_extension "plpgsql"
 
-  create_table "contest_relations", force: true do |t|
+  create_table "contest_relations", force: :cascade do |t|
     t.integer  "user_id"
     t.integer  "contest_id"
     t.datetime "started_at"
@@ -40,7 +40,7 @@
   add_index "contest_relations", ["contest_id", "user_id"], name: "index_contest_relations_on_contest_id_and_user_id", unique: true, using: :btree
   add_index "contest_relations", ["user_id", "started_at"], name: "index_contest_relations_on_user_id_and_started_at", using: :btree
 
-  create_table "contest_scores", force: true do |t|
+  create_table "contest_scores", force: :cascade do |t|
     t.integer  "contest_relation_id", null: false
     t.integer  "problem_id",          null: false
     t.integer  "score"
@@ -52,7 +52,7 @@
 
   add_index "contest_scores", ["contest_relation_id", "problem_id"], name: "index_contest_scores_on_contest_relation_id_and_problem_id", using: :btree
 
-  create_table "contest_supervisors", force: true do |t|
+  create_table "contest_supervisors", force: :cascade do |t|
     t.integer  "contest_id"
     t.integer  "user_id"
     t.string   "site_type"
@@ -62,7 +62,7 @@
     t.datetime "scheduled_start_time"
   end
 
-  create_table "contests", force: true do |t|
+  create_table "contests", force: :cascade do |t|
     t.string   "name"
     t.datetime "start_time"
     t.datetime "end_time"
@@ -80,13 +80,13 @@
     t.boolean  "only_rank_official_contestants", default: false
   end
 
-  create_table "entities", force: true do |t|
+  create_table "entities", force: :cascade do |t|
     t.string  "name"
     t.integer "entity_id"
     t.string  "entity_type"
   end
 
-  create_table "evaluators", force: true do |t|
+  create_table "evaluators", force: :cascade do |t|
     t.string   "name",                     null: false
     t.text     "description", default: "", null: false
     t.text     "source",      default: "", null: false
@@ -95,15 +95,15 @@
     t.datetime "updated_at"
   end
 
-  create_table "file_attachments", force: true do |t|
+  create_table "file_attachments", force: :cascade do |t|
     t.string   "name"
     t.string   "file_attachment"
     t.integer  "owner_id"
     t.datetime "created_at",      null: false
     t.datetime "updated_at",      null: false
   end
 
-  create_table "filelinks", force: true do |t|
+  create_table "filelinks", force: :cascade do |t|
     t.integer  "root_id"
     t.integer  "file_attachment_id"
     t.datetime "created_at"
@@ -115,21 +115,21 @@
   add_index "filelinks", ["file_attachment_id"], name: "index_filelinks_on_file_attachment_id", using: :btree
   add_index "filelinks", ["root_id", "filepath"], name: "index_filelinks_on_root_id_and_filepath", using: :btree
 
-  create_table "group_contests", force: true do |t|
+  create_table "group_contests", force: :cascade do |t|
     t.integer "group_id"
     t.integer "contest_id"
   end
 
   add_index "group_contests", ["contest_id", "group_id"], name: "index_group_contests_on_contest_id_and_group_id", using: :btree
   add_index "group_contests", ["group_id", "contest_id"], name: "index_group_contests_on_group_id_and_contest_id", using: :btree
 
-  create_table "group_memberships", force: true do |t|
+  create_table "group_memberships", force: :cascade do |t|
     t.integer  "group_id"
     t.integer  "member_id"
     t.datetime "created_at"
   end
 
-  create_table "group_problem_sets", force: true do |t|
+  create_table "group_problem_sets", force: :cascade do |t|
     t.integer "group_id"
     t.integer "problem_set_id"
     t.string  "name"
@@ -138,7 +138,7 @@
   add_index "group_problem_sets", ["group_id", "problem_set_id"], name: "index_group_problem_sets_on_group_id_and_problem_set_id", using: :btree
   add_index "group_problem_sets", ["problem_set_id", "group_id"], name: "index_group_problem_sets_on_problem_set_id_and_group_id", using: :btree
 
-  create_table "groups", force: true do |t|
+  create_table "groups", force: :cascade do |t|
     t.string   "name"
     t.datetime "created_at"
     t.datetime "updated_at"
@@ -147,7 +147,7 @@
     t.integer  "membership", default: 0, null: false
   end
 
-  create_table "item_histories", force: true do |t|
+  create_table "item_histories", force: :cascade do |t|
     t.integer  "item_id"
     t.boolean  "active"
     t.integer  "action"
@@ -158,7 +158,7 @@
     t.datetime "updated_at"
   end
 
-  create_table "items", force: true do |t|
+  create_table "items", force: :cascade do |t|
     t.integer "product_id"
     t.integer "owner_id"
     t.integer "organisation_id"
@@ -170,7 +170,7 @@
     t.integer "scan_token"
   end
 
-  create_table "language_groups", force: true do |t|
+  create_table "language_groups", force: :cascade do |t|
     t.string   "identifier"
     t.string   "name"
     t.integer  "current_language_id"
@@ -180,7 +180,7 @@
 
   add_index "language_groups", ["identifier"], name: "index_language_groups_on_identifier", unique: true, using: :btree
 
-  create_table "languages", force: true do |t|
+  create_table "languages", force: :cascade do |t|
     t.string   "identifier"
     t.string   "compiler"
     t.boolean  "interpreted"
@@ -201,17 +201,17 @@
 
   add_index "languages", ["identifier"], name: "index_languages_on_identifier", unique: true, using: :btree
 
-  create_table "organisations", force: true do |t|
+  create_table "organisations", force: :cascade do |t|
   end
 
-  create_table "problem_series", force: true do |t|
+  create_table "problem_series", force: :cascade do |t|
     t.string "name"
     t.string "identifier"
     t.string "importer_type"
     t.text   "index_yaml"
   end
 
-  create_table "problem_set_problems", force: true do |t|
+  create_table "problem_set_problems", force: :cascade do |t|
     t.integer "problem_set_id"
     t.integer "problem_id"
     t.integer "problem_set_order"
@@ -221,15 +221,15 @@
   add_index "problem_set_problems", ["problem_id", "problem_set_id"], name: "index_problem_set_problems_on_problem_id_and_problem_set_id", using: :btree
   add_index "problem_set_problems", ["problem_set_id", "problem_id"], name: "index_problem_set_problems_on_problem_set_id_and_problem_id", using: :btree
 
-  create_table "problem_sets", force: true do |t|
+  create_table "problem_sets", force: :cascade do |t|
     t.string   "name"
     t.integer  "owner_id"
     t.datetime "created_at"
     t.datetime "updated_at"
     t.integer  "finalized_contests_count", default: 0
   end
 
-  create_table "problems", force: true do |t|
+  create_table "problems", force: :cascade do |t|
     t.string   "name"
     t.text     "statement"
     t.string   "input"
@@ -246,44 +246,44 @@
     t.integer  "test_status",        default: 0
   end
 
-  create_table "products", force: true do |t|
+  create_table "products", force: :cascade do |t|
     t.string  "name"
     t.integer "gtin",        limit: 8
     t.text    "description"
     t.string  "image"
   end
 
-  create_table "requests", force: true do |t|
+  create_table "requests", force: :cascade do |t|
     t.integer  "requester_id"
     t.integer  "subject_id"
     t.string   "subject_type"
-    t.string   "verb",                            null: false
-    t.integer  "target_id",                       null: false
-    t.string   "target_type",                     null: false
-    t.integer  "status",       default: 0,        null: false
+    t.string   "verb",                              null: false
+    t.integer  "target_id",                         null: false
+    t.string   "target_type",                       null: false
+    t.integer  "status",       default: 0,          null: false
     t.integer  "requestee_id"
-    t.datetime "expired_at",   default: Infinity, null: false
-    t.datetime "created_at",                      null: false
-    t.datetime "updated_at",                      null: false
+    t.datetime "expired_at",   default: 'Infinity', null: false
+    t.datetime "created_at",                        null: false
+    t.datetime "updated_at",                        null: false
   end
 
-  create_table "roles", force: true do |t|
+  create_table "roles", force: :cascade do |t|
     t.string "name"
   end
 
-  create_table "roles_users", id: false, force: true do |t|
+  create_table "roles_users", id: false, force: :cascade do |t|
     t.integer "role_id"
     t.integer "user_id"
   end
 
-  create_table "schools", force: true do |t|
+  create_table "schools", force: :cascade do |t|
     t.string  "name"
     t.string  "country_code", limit: 2
     t.integer "users_count"
     t.integer "synonym_id"
   end
 
-  create_table "sessions", force: true do |t|
+  create_table "sessions", force: :cascade do |t|
     t.string   "session_id", null: false
     t.text     "data"
     t.datetime "created_at"
@@ -294,14 +294,14 @@
   add_index "sessions", ["session_id"], name: "index_sessions_on_session_id", using: :btree
   add_index "sessions", ["updated_at"], name: "index_sessions_on_updated_at", using: :btree
 
-  create_table "settings", force: true do |t|
+  create_table "settings", force: :cascade do |t|
     t.string "key"
     t.string "value"
   end
 
   add_index "settings", ["key"], name: "index_settings_on_key", unique: true, using: :btree
 
-  create_table "submissions", force: true do |t|
+  create_table "submissions", force: :cascade do |t|
     t.text     "source"
     t.integer  "score"
     t.integer  "user_id"
@@ -325,7 +325,7 @@
   add_index "submissions", ["problem_id", "created_at"], name: "index_submissions_on_problem_id_and_created_at", using: :btree
   add_index "submissions", ["user_id", "problem_id"], name: "index_submissions_on_user_id_and_problem_id", using: :btree
 
-  create_table "test_case_relations", force: true do |t|
+  create_table "test_case_relations", force: :cascade do |t|
     t.integer  "test_case_id"
     t.integer  "test_set_id"
     t.datetime "created_at",   null: false
@@ -335,7 +335,7 @@
   add_index "test_case_relations", ["test_case_id"], name: "index_test_case_relations_on_test_case_id", using: :btree
   add_index "test_case_relations", ["test_set_id"], name: "index_test_case_relations_on_test_set_id", using: :btree
 
-  create_table "test_cases", force: true do |t|
+  create_table "test_cases", force: :cascade do |t|
     t.text     "input"
     t.text     "output"
     t.string   "name"
@@ -348,7 +348,7 @@
 
   add_index "test_cases", ["problem_id", "name"], name: "index_test_cases_on_problem_id_and_name", unique: true, using: :btree
 
-  create_table "test_sets", force: true do |t|
+  create_table "test_sets", force: :cascade do |t|
     t.integer  "problem_id"
     t.integer  "points"
     t.string   "name"
@@ -360,7 +360,7 @@
 
   add_index "test_sets", ["problem_id", "name"], name: "index_test_sets_on_problem_id_and_name", unique: true, using: :btree
 
-  create_table "user_problem_relations", force: true do |t|
+  create_table "user_problem_relations", force: :cascade do |t|
     t.integer  "problem_id"
     t.integer  "user_id"
     t.integer  "submissions_count"
@@ -376,7 +376,7 @@
   add_index "user_problem_relations", ["problem_id", "ranked_score"], name: "index_user_problem_relations_on_problem_id_and_ranked_score", using: :btree
   add_index "user_problem_relations", ["user_id", "problem_id"], name: "index_user_problem_relations_on_user_id_and_problem_id", unique: true, using: :btree
 
-  create_table "users", force: true do |t|
+  create_table "users", force: :cascade do |t|
     t.string   "email",                            default: "",    null: false
     t.string   "encrypted_password",               default: "",    null: false
     t.string   "reset_password_token"