Question

SQLite3 :: ConstraintException：UNIQUE约束失败：users.email：INSERT INTO“users”（“name”，“email”，“created_at”，“updated_at”，“password_digest”）VALUES（？，？，？，？，？）

def create
@user = User.new(user_params)
if @user.save #red line here

else
  render 'new'

users_controller.rb

class UsersController < ApplicationController
  def show
@user = User.find(params[:id])
  end
  def new
@user = User.new
  end
  def create
@user = User.new(user_params)
if @user.save
  # Handle a successful save.
else
  render 'new'
end
end
  private

  def user_params
    params.require(:user).permit(:name, :email, :password,
                                 :password_confirmation)
  end
end

用户模型 user.rb

class User < ApplicationRecord
  before_save { self.email = email.downcase }
  validates :name,  presence: true, length: { maximum: 50 }
  VALID_EMAIL_REGEX = /\A[\w+\-.]+@[a-z\d\-.]+\.[a-z]+\z/i
  validates :email, presence: true, length: { maximum: 255 },
            format: { with: VALID_EMAIL_REGEX }
  has_secure_password
  validates :password, presence: true, length: { minimum: 6 }
end
enter code here

Answer 1

错误表示您对数据库中的字段有约束，在本例中为表users，字段email，并且您正在插入已存在的电子邮件。转到查看用户表的迁移。

UsersController中的ActiveRecord :: RecordNotUnique #create

1 个答案: