Why am I receiving an ActiveRecord::StatementInvalid: PG::SyntaxError: ERROR when using a boolean field in a rails app with Postgresql?

Question

我正在开发 rails API 并使用 Heroku。所有环境都使用 Postgres。我在 rake db:setup 和 rake db:test:prepare （以及 'heroku run rake db:setup' 中遇到了同样的错误）。这个问题最初是在我第一次尝试推送到 Heroku 时出现的。我在本地使用 mysql。由于已将开发和测试迁移到 postgres 以避免将来出现此类意外...

$ rake db:test:prepare
rake aborted!
ActiveRecord::StatementInvalid: PG::SyntaxError: ERROR:  syntax error at or near "("
LINE 1: ...r, "borrower_id" integer, "lenderAccepted" boolean(1), "crea...
                                                         ^
: CREATE TABLE "bookings" ("id" serial primary key, "pickup" timestamp, "hoursBooked" integer, "lender_id" integer, "borrower_id" integer, "lenderAccepted" boolean(1), "created_at" timestamp NOT NULL, "updated_at" timestamp NOT NULL, "equipment_id" integer)

这是迁移：

class CreateBookings < ActiveRecord::Migration
  def change
    create_table :bookings do |t|
      t.datetime :pickup
      t.integer :hoursBooked
      t.references :lender, index: true
      t.references :borrower, index: true
      t.boolean :lenderAccepted

      t.timestamps null: false
    end
    add_foreign_key :bookings, :lenders
    add_foreign_key :bookings, :borrowers
  end
end

这是我的 gemfile：

source 'https://rubygems.org'

gem 'rails', '4.2.0'
gem 'sass-rails', '5.0.0.beta1'
gem 'uglifier', '2.5.3'
gem 'coffee-rails', '4.1.0'
gem 'jquery-rails', '4.0.0.beta2'
gem 'turbolinks', '2.3.0'
gem 'jbuilder', '2.2.3'
gem 'devise', '3.4.1'
gem 'sdoc', '0.4.0', group: :doc
gem 'pg',   '0.17.1'

gem 'bcrypt-ruby', '3.1.1.rc1', :require => 'bcrypt'

group :development, :test do
  gem 'byebug', '3.4.0'
  gem 'web-console', '2.0.0.beta2'
  gem 'spring', '1.1.3'
end

group :production do
  gem 'rails_12factor', '0.0.2'
end

group :test do
  gem 'minitest-reporters', '1.0.5'
  gem 'mini_backtrace', '0.1.3'
  gem 'guard-minitest', '2.3.1'
end

正在使用：

ruby 2.1.4p265（2014-10-27 修订版 48166）[x86_64-linux]
rails 4.2.0
Postgres 9.3.5

感谢您提供的任何帮助。

比尔

PS，添加生成的架构：

create_table "bookings", force: :cascade do |t|
    t.datetime "pickup"
    t.integer  "hoursBooked",    limit: 4
    t.integer  "lender_id",      limit: 4
    t.integer  "borrower_id",    limit: 4
    t.boolean  "lenderAccepted", limit: 1
    t.datetime "created_at",               null: false
    t.datetime "updated_at",               null: false
    t.integer  "equipment_id",   limit: 4
end

add_index "bookings", ["borrower_id"], name: "index_bookings_on_borrower_id", using: :btree
add_index "bookings", ["equipment_id"], name: "index_bookings_on_equipment_id", using: :btree
add_index "bookings", ["lender_id"], name: "index_bookings_on_lender_id", using: :btree

Answer 1

胜利是亩太短了！感谢您富有洞察力的评论！

看来问题是原来的db:migration 运行当我使用mysql 时postgres 不能接受。注释掉迁移和架构中的字段，然后将它们重新添加到新的迁移下修复所有...

class AddBackBooleansMigration < ActiveRecord::Migration
  def change
      add_column :bookings, :lender_accepted, :boolean
      # other similar boolean adds
  end
end

新架构：

  create_table "bookings", force: :cascade do |t|
    ...
    t.boolean  "lender_accepted"
  end

然后耙它直到你成功。

$ rake db:migrate
== 20150105131615 AddBackBooleansMigration: migrating =========================
-- add_column(:bookings, :lender_accepted, :boolean)
   -> 0.0333s
...
== 20150105131615 AddBackBooleansMigration: migrated (0.0370s) ================

Answer 2

由于 AR+mysql 伪造布尔字段的方式，这是 Rails 中的错误。我为此做了一个补丁:) https://github.com/rails/rails/issues/19065

Why am I receiving an ActiveRecord::StatementInvalid: PG::SyntaxError: ERROR when using a boolean field in a rails app with Postgresql?

Why am I receiving an ActiveRecord::StatementInvalid: PG::SyntaxError: ERROR when using a boolean field in a rails app with Postgresql?

postgresql

boolean

ruby-on-rails

heroku

create-table