feat: add migration to change user bio default

Author: Lewis Youl

app/models/user.rb

@@ -5,7 +5,6 @@ class User < ApplicationRecord
   include Rails.application.routes.url_helpers
 
   DEFAULT_FOLDER_NAME = 'My First Folder'.freeze
-  BIO_MISSING_TEXT = "This user hasn't updated their bio yet."
   ALPHANUMERIC = /\A[a-zA-Z0-9]*\z/.freeze
 
   friendly_id :name, use: :slugged

db/migrate/20210315204751_update_bio_text_for_users.rb

@@ -0,0 +1,10 @@
+class UpdateBioTextForUsers < ActiveRecord::Migration[6.0]
+  OLD_DEFAULT = "This user hasn't updated their bio yet.".freeze
+  NEW_DEFAULT = "404 - bio not found".freeze
+
+  def change
+    change_column_default(:users, :bio, from: OLD_DEFAULT, to: NEW_DEFAULT)
+    
+    User.where(bio: OLD_DEFAULT).each { |u| u.update!(bio: NEW_DEFAULT) }
+  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: 2021_03_15_202025) do
+ActiveRecord::Schema.define(version: 2021_03_15_204751) do
 
   # These are extensions that must be enabled in order to support this database
   enable_extension "plpgsql"
@@ -133,7 +133,7 @@
     t.datetime "remember_created_at"
     t.datetime "created_at", precision: 6, null: false
     t.datetime "updated_at", precision: 6, null: false
-    t.string "bio", default: "This user hasn't updated their bio yet."
+    t.string "bio", default: "404 - bio not found"
     t.string "location", default: ""
     t.string "confirmation_token"
     t.datetime "confirmed_at"