Updated GroupCategory functionality with Groups

• Updated:
- GroupCategory functionality with Groups

db/migrate/20200908210102_remove_group_categories_id_from_group.rb

@@ -0,0 +1,5 @@
+class RemoveGroupCategoriesIdFromGroup < ActiveRecord::Migration[5.2]
+  def change
+    safety_assured { remove_column :groups, :group_categories_id }
+  end
+end

db/migrate/20200908210103_add_foreign_key_to_group_for_group_category.rb

@@ -0,0 +1,6 @@
+class AddForeignKeyToGroupForGroupCategory < ActiveRecord::Migration[5.2]
+  def change
+    add_column :groups, :group_category_id, :integer
+    add_foreign_key :groups, :group_categories, on_delete: :nullify, validate: false
+  end
+end

db/migrate/20200908210104_validate_add_foreign_key_to_group_for_group_category.rb

@@ -0,0 +1,5 @@
+class ValidateAddForeignKeyToGroupForGroupCategory < ActiveRecord::Migration[5.2]
+  def change
+    validate_foreign_key :groups, :group_categories
+  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: 2020_09_01_165533) do
+ActiveRecord::Schema.define(version: 2020_09_08_210104) do
 
   # These are extensions that must be enabled in order to support this database
   enable_extension "pg_stat_statements"
@@ -391,10 +391,9 @@ ActiveRecord::Schema.define(version: 2020_09_01_165533) do
     t.boolean "is_private", default: false
     t.boolean "is_visible", default: false
     t.string "tags", default: [], array: true
-    t.bigint "group_categories_id"
     t.string "password"
+    t.integer "group_category_id"
     t.index ["account_id"], name: "index_groups_on_account_id"
-    t.index ["group_categories_id"], name: "index_groups_on_group_categories_id"
     t.index ["slug"], name: "index_groups_on_slug", unique: true
   end
 
@@ -959,6 +958,7 @@ ActiveRecord::Schema.define(version: 2020_09_01_165533) do
   add_foreign_key "group_pinned_statuses", "statuses", 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 "groups", "group_categories", on_delete: :nullify
   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