ActiveRecord::StatementInvalid in Devise::RegistrationsController#create - ruby-on-rails

Question

I'm trying to add some extra information to my Devise User model like first_name, last_name, age, gender and city.
When I fill the signup form and click to submit I get this error:
SQLite3::ConstraintException: NOT NULL constraint failed: users.first_name: INSERT INTO "users" ("email", "encrypted_password", "created_at", "updated_at") VALUES (?, ?, ?, ?)
def each
loop do
val = step
break self if done?
yield val
end
And these are the parameters if they are any use:
Parameters:
{"utf8"=>"✓",
"authenticity_token"=>"2e5oUwMw84HtwSuI09X1O5kjPLYk7SW4VKgGOOxcB93W7sSQYjPgq3N/BGo0+oAEifhec4lQ3PUt9vub17vs7g==",
"user"=>
{"first_name"=>"Test", "last_name"=>"Test", "age"=>"69", "city"=>"New York", "gender"=>"Trans", "email"=>"test.test#email.com", "password"=>"[FILTERED]", "password_confirmation"=>"[FILTERED]"},
"commit"=>"Sign up"}
Here is my schema.rb just in case:
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"
t.datetime "reset_password_sent_at"
t.datetime "remember_created_at"
t.integer "sign_in_count", default: 0, null: false
t.datetime "current_sign_in_at"
t.datetime "last_sign_in_at"
t.string "current_sign_in_ip"
t.string "last_sign_in_ip"
t.string "confirmation_token"
t.datetime "confirmed_at"
t.datetime "confirmation_sent_at"
t.string "unconfirmed_email"
t.string "first_name", null: false
t.string "last_name", null: false
t.integer "age", null: false
t.string "city", null: false
t.string "gender", null: false
t.datetime "created_at", null: false
t.datetime "updated_at", null: false
t.index ["confirmation_token"], name: "index_users_on_confirmation_token", unique: true
t.index ["email"], name: "index_users_on_email", unique: true
t.index ["reset_password_token"], name: "index_users_on_reset_password_token", unique: true
end
Here is my user.rb model too:
class User < ApplicationRecord
# Include default devise modules. Others available are:
# :confirmable, :lockable, :timeoutable and :omniauthable
devise :database_authenticatable, :registerable,
:recoverable, :rememberable, :trackable, :validatable
end

Answer 1

To have additional columns on user not already set in devise I allowed access in my ApplicationContoller this way. Rails4
before_filter :configure_permitted_parameters, if: :devise_controller?
protected
def configure_permitted_parameters
# Only add some parameters
devise_parameter_sanitizer.for(:accept_invitation).concat [:first_name, :last_name]
end
or
before_action :configure_permitted_parameters, if: :devise_controller?
protected
def configure_permitted_parameters
devise_parameter_sanitizer.for(:sign_up) << :full_name
end
and this would allow you to have first_name last_name with the other things that you have set up.
Rails5
def configure_permitted_parameters
additional_params = [:name, :company, :email_confirmation, {addresses_attributes: [:address1, :address2, :city, :state, :zip, :country, :name]}]
devise_parameter_sanitizer.permit(:sign_up, keys: additional_params)
devise_parameter_sanitizer.permit(:account_update, keys: additional_params)
end

Answer 2

You have a unique index on email. What the error is saying is that the email you are trying to save is not null in the database. A user already has this email. Change the email and it should work.
# to check for the user in the database
rails c
user = User.find_by_email("test.test#email.com") should bring back a user.