group_removed_users table to forbid users joining once removed

app/models/group_removed_account.rb

@@ -0,0 +1,13 @@
+# == Schema Information
+#
+# Table name: group_removed_accounts
+#
+#  id         :bigint(8)        not null, primary key
+#  group_id   :bigint(8)        not null
+#  account_id :bigint(8)        not null
+#  created_at :datetime         not null
+#  updated_at :datetime         not null
+#
+
+class GroupRemovedAccount < ApplicationRecord
+end

db/migrate/20190716173227_create_group_removed_accounts.rb

@@ -0,0 +1,12 @@
+class CreateGroupRemovedAccounts < ActiveRecord::Migration[5.2]
+  def change
+    create_table :group_removed_accounts do |t|
+      t.belongs_to :group, foreign_key: { on_delete: :cascade }, null: false
+      t.belongs_to :account, foreign_key: { on_delete: :cascade }, null: false
+      t.timestamps
+    end
+
+    add_index :group_removed_accounts, [:account_id, :group_id], unique: true
+    add_index :group_removed_accounts, [:group_id, :account_id]
+  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: 2019_06_07_000211) do
+ActiveRecord::Schema.define(version: 2019_07_16_173227) do
 
   # These are extensions that must be enabled in order to support this database
   enable_extension "plpgsql"
@@ -93,7 +93,7 @@ ActiveRecord::Schema.define(version: 2019_06_07_000211) do
     t.bigint "account_id"
     t.string "image_file_name"
     t.string "image_content_type"
-    t.bigint "image_file_size"
+    t.integer "image_file_size"
     t.datetime "image_updated_at"
     t.datetime "created_at", null: false
     t.datetime "updated_at", null: false
@@ -157,10 +157,10 @@ ActiveRecord::Schema.define(version: 2019_06_07_000211) do
     t.string "actor_type"
     t.boolean "discoverable"
     t.string "also_known_as", array: true
-    t.datetime "silenced_at"
-    t.datetime "suspended_at"
     t.boolean "is_pro", default: false, null: false
     t.datetime "pro_expires_at"
+    t.datetime "silenced_at"
+    t.datetime "suspended_at"
     t.boolean "is_verified", default: false, null: false
     t.boolean "is_donor", default: false, null: false
     t.boolean "is_investor", default: false, null: false
@@ -333,6 +333,17 @@ ActiveRecord::Schema.define(version: 2019_06_07_000211) do
     t.index ["group_id"], name: "index_group_accounts_on_group_id"
   end
 
+  create_table "group_removed_accounts", force: :cascade do |t|
+    t.bigint "group_id", null: false
+    t.bigint "account_id", null: false
+    t.datetime "created_at", null: false
+    t.datetime "updated_at", null: false
+    t.index ["account_id", "group_id"], name: "index_group_removed_accounts_on_account_id_and_group_id", unique: true
+    t.index ["account_id"], name: "index_group_removed_accounts_on_account_id"
+    t.index ["group_id", "account_id"], name: "index_group_removed_accounts_on_group_id_and_account_id"
+    t.index ["group_id"], name: "index_group_removed_accounts_on_group_id"
+  end
+
   create_table "groups", force: :cascade do |t|
     t.bigint "account_id"
     t.string "title", null: false
@@ -645,8 +656,8 @@ ActiveRecord::Schema.define(version: 2019_06_07_000211) do
   create_table "status_pins", force: :cascade do |t|
     t.bigint "account_id", null: false
     t.bigint "status_id", null: false
-    t.datetime "created_at", default: -> { "now()" }, null: false
+    t.datetime "created_at", default: -> { "CURRENT_TIMESTAMP" }, null: false
-    t.datetime "updated_at", default: -> { "now()" }, null: false
+    t.datetime "updated_at", default: -> { "CURRENT_TIMESTAMP" }, null: false
     t.index ["account_id", "status_id"], name: "index_status_pins_on_account_id_and_status_id", unique: true
   end
 
@@ -849,6 +860,8 @@ ActiveRecord::Schema.define(version: 2019_06_07_000211) do
   add_foreign_key "follows", "accounts", name: "fk_32ed1b5560", on_delete: :cascade
   add_foreign_key "group_accounts", "accounts", on_delete: :cascade
   add_foreign_key "group_accounts", "groups", on_delete: :cascade
+  add_foreign_key "group_removed_accounts", "accounts", on_delete: :cascade
+  add_foreign_key "group_removed_accounts", "groups", on_delete: :cascade
   add_foreign_key "identities", "users", name: "fk_bea040f377", on_delete: :cascade
   add_foreign_key "imports", "accounts", name: "fk_6db1b6e408", on_delete: :cascade
   add_foreign_key "invites", "users", on_delete: :cascade

spec/fabricators/group_removed_account_fabricator.rb

@@ -0,0 +1,2 @@
+Fabricator(:group_removed_account) do
+end

spec/models/group_removed_account_spec.rb

@@ -0,0 +1,5 @@
+require 'rails_helper'
+
+RSpec.describe GroupRemovedAccount, type: :model do
+  pending "add some examples to (or delete) #{__FILE__}"
+end