我的 sqlite 数据库无法保存任何东西？

Question

我有一个带有模型、控制器和序列化器的 Rails Api。数据库设置好了，我进行了几次迁移，所有这些都导致了架构的相应更改。但是，无论是在 Rails 控制台中还是从种子数据中，都没有将任何内容持久化到数据库中。例如，当我尝试在控制台中运行 User.create 时，我看到出现以下消息：

2.3.3 :003 > User.create
(0.1ms)  begin transaction
(0.1ms)  rollback transaction
=> #<User id: nil, email: "", created_at: nil, updated_at: nil>  

同样，我的种子文件中有这些数据：

users = User.create([{ email: 'adam@adam.com' }, { email: 'ryan@ryan.com' 
 }])
BankAccount.create(name: 'Adams Chase Checking Account', user_id: users.first) 

当我运行 rake db:seed 并尝试在 rails 控制台中调用 User.all 或 BankAccount.all 时，在这两种情况下我都会得到一个空数组。我听说过这样的错误是由模型上未满足的验证引起的，但我的模型没有任何验证。我不知道是什么导致了这个问题。任何帮助是极大的赞赏！另外，值得一提的是，这个项目使用 Rails 5.1.4，而我之前只使用过 4.x.x。这是用户模型（使用设计）：

class User < ApplicationRecord
# Include default devise modules. Others available are:
# :confirmable, :lockable, :timeoutable and :omniauthable
devise :database_authenticatable, :registerable,
     :recoverable, :rememberable, :trackable, :validatable 
has_many :bank_accounts 
has_many :credit_cards
has_many :investments 
has_many :loans 
has_many :assets 
has_many :recurring_payments, through: :bank_accounts
has_many :recurring_payments, through: :credit_cards
has_many :recurring_payments, through: :investments
has_many :recurring_payments, through: :loans
end  

这里是银行账户模型：

class BankAccount < ApplicationRecord 
belongs_to :user 
has_many :recurring_payments 
accepts_nested_attributes_for :recurring_payments
end

这是完整的架构：

ActiveRecord::Schema.define(version: 20180205231948) do

create_table "assets", force: :cascade do |t|
t.string "name"
t.integer "value"
t.integer "user_id"
t.datetime "created_at", null: false
t.datetime "updated_at", null: false
end

create_table "bank_accounts", force: :cascade do |t|
t.string "name"
t.integer "balance"
t.integer "user_id"
t.datetime "created_at", null: false
t.datetime "updated_at", null: false
end

create_table "credit_cards", force: :cascade do |t|
t.string "provider"
t.integer "balance"
t.integer "interest_rate"
t.integer "user_id"
t.datetime "created_at", null: false
t.datetime "updated_at", null: false
end

create_table "investments", force: :cascade do |t|
t.string "name"
t.integer "value"
t.integer "user_id"
t.datetime "created_at", null: false
t.datetime "updated_at", null: false
end

create_table "loans", force: :cascade do |t|
t.integer "user_id"
t.integer "interest_rate"
t.integer "remaining_balance"
t.datetime "created_at", null: false
t.datetime "updated_at", null: false
end

create_table "recurring_payments", force: :cascade do |t|
t.string "source"
t.boolean "status"
t.date "pay_date"
t.integer "pay_amount"
t.integer "duration"
t.integer "bank_account_id"
t.integer "credit_card_id"
t.integer "loan_id"
t.integer "investment_id"
t.datetime "created_at", null: false
t.datetime "updated_at", null: false
end

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.datetime "created_at", null: false
t.datetime "updated_at", null: false
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

end

Answer 1

我的猜测是这样的。

users = User.create([{ email: 'adam@adam.com' }, { email: 'ryan@ryan.com' }])

Devise 在保存前验证默认密码（最少 6 个字符）。试试在控制台运行这个命令，看看有没有报错？

user = User.create(email: 'adam@adam.com')
user.errors