기존 mySQL 데이터베이스로 레일스 인스턴스를 만들려고하고 있으며 this guide을 따르고 있습니다.Rake : 기존 mySQL 데이터베이스에서 db 마이그레이션 실패
1 ~ 3 단계가 작동했지만 레일 서버를 실행할 때 보류중인 마이그레이션이 있다고합니다.
누군가가 오류의 원인을 알 수 있거나 기존 mySQL 데이터베이스를 레일 응용 프로그램과 통합하는 방법에 대한 일반적인 지침을 제공하는 경우 매우 감사하게 생각합니다.
실행 레이크 dB : 여기
== 1 CreateDatabase: migrating ================================================
-- create_table("Bill", {:primary_key=>"confirmationNo", :id=>:integer, :force=>:cascade, :options=>"ENGINE=InnoDB DEFAULT CHARSET=latin1"})
-> 0.0556s
-- create_table("Customer", {:primary_key=>"creditCardNo", :id=>:integer, :force=>:cascade, :options=>"ENGINE=InnoDB DEFAULT CHARSET=latin1"})
rake aborted!
StandardError: An error has occurred, all later migrations canceled:
Mysql2::Error: Cannot delete or update a parent row: a foreign key constraint fails: DROP TABLE `Customer` CASCADE
은 수율 내 schema.rb을이 오류를 마이그레이션 및/001_create_database.rb
schema.rb
ActiveRecord::Schema.define(version: 0) do
create_table "Bill", primary_key: "confirmationNo", id: :integer, force: :cascade, options: "ENGINE=InnoDB DEFAULT CHARSET=latin1" do |t|
t.integer "pointsEarned", null: false
t.float "amountDue", limit: 24, null: false
end
create_table "Customer", primary_key: "creditCardNo", id: :integer, force: :cascade, options: "ENGINE=InnoDB DEFAULT CHARSET=latin1" do |t|
t.integer "guestID", null: false
t.string "username", limit: 30
t.string "name", limit: 30, null: false
t.index ["guestID", "username"], name: "guestID", unique: true, using: :btree
t.index ["username"], name: "username", using: :btree
end
create_table "Manager", primary_key: "managerID", id: :integer, force: :cascade, options: "ENGINE=InnoDB DEFAULT CHARSET=latin1" do |t|
t.string "name", limit: 10, null: false
end
create_table "Reservation", primary_key: "confirmationNo", id: :integer, force: :cascade, options: "ENGINE=InnoDB DEFAULT CHARSET=latin1" do |t|
t.date "inDate"
t.date "outDate"
t.boolean "availability", null: false
t.integer "roomNo"
t.integer "creditCardNo"
t.index ["creditCardNo"], name: "creditCardNo", using: :btree
t.index ["inDate", "outDate"], name: "inDate", using: :btree
t.index ["roomNo"], name: "roomNo", using: :btree
end
create_table "Room", primary_key: "roomNo", id: :integer, force: :cascade, options: "ENGINE=InnoDB DEFAULT CHARSET=latin1" do |t|
t.string "roomType", limit: 30, null: false
t.index ["roomType"], name: "roomType", using: :btree
end
create_table "Roomtype", primary_key: "roomType", id: :string, limit: 30, force: :cascade, options: "ENGINE=InnoDB DEFAULT CHARSET=latin1" do |t|
t.integer "capacity", null: false
t.float "rate", limit: 24, null: false
end
create_table "Stay", primary_key: ["inDate", "outDate"], force: :cascade, options: "ENGINE=InnoDB DEFAULT CHARSET=latin1" do |t|
t.date "inDate", null: false
t.date "outDate", null: false
end
create_table "User", primary_key: "username", id: :string, limit: 1, force: :cascade, options: "ENGINE=InnoDB DEFAULT CHARSET=latin1" do |t|
t.integer "points", null: false
end
add_foreign_key "Bill", "Reservation", column: "confirmationNo", primary_key: "confirmationNo", name: "Bill_ibfk_1"
add_foreign_key "Customer", "User", column: "username", primary_key: "username", name: "Customer_ibfk_1"
add_foreign_key "Reservation", "Customer", column: "creditCardNo", primary_key: "creditCardNo", name: "Reservation_ibfk_3"
add_foreign_key "Reservation", "Room", column: "roomNo", primary_key: "roomNo", name: "Reservation_ibfk_1"
add_foreign_key "Reservation", "Stay", column: "inDate", primary_key: "inDate", name: "Reservation_ibfk_2", on_delete: :cascade
add_foreign_key "Reservation", "Stay", column: "outDate", primary_key: "outDate", name: "Reservation_ibfk_2", on_delete: :cascade
add_foreign_key "Room", "Roomtype", column: "roomType", primary_key: "roomType", name: "Room_ibfk_1"
end
마이그레이션/001_create_database.rb 마이그레이션
class CreateDatabase < ActiveRecord::Migration
def self.up
ActiveRecord::Schema.define(version: 0) do
create_table "Bill", primary_key: "confirmationNo", id: :integer, force: :cascade, options: "ENGINE=InnoDB DEFAULT CHARSET=latin1" do |t|
t.integer "pointsEarned", null: false
t.float "amountDue", limit: 24, null: false
end
create_table "Customer", primary_key: "creditCardNo", id: :integer, force: :cascade, options: "ENGINE=InnoDB DEFAULT CHARSET=latin1" do |t|
t.integer "guestID", null: false
t.string "username", limit: 30
t.string "name", limit: 30, null: false
t.index ["guestID", "username"], name: "guestID", unique: true, using: :btree
t.index ["username"], name: "username", using: :btree
end
create_table "Manager", primary_key: "managerID", id: :integer, force: :cascade, options: "ENGINE=InnoDB DEFAULT CHARSET=latin1" do |t|
t.string "name", limit: 10, null: false
end
create_table "Reservation", primary_key: "confirmationNo", id: :integer, force: :cascade, options: "ENGINE=InnoDB DEFAULT CHARSET=latin1" do |t|
t.date "inDate"
t.date "outDate"
t.boolean "availability", null: false
t.integer "roomNo"
t.integer "creditCardNo"
t.index ["creditCardNo"], name: "creditCardNo", using: :btree
t.index ["inDate", "outDate"], name: "inDate", using: :btree
t.index ["roomNo"], name: "roomNo", using: :btree
end
create_table "Room", primary_key: "roomNo", id: :integer, force: :cascade, options: "ENGINE=InnoDB DEFAULT CHARSET=latin1" do |t|
t.string "roomType", limit: 30, null: false
t.index ["roomType"], name: "roomType", using: :btree
end
create_table "Roomtype", primary_key: "roomType", id: :string, limit: 30, force: :cascade, options: "ENGINE=InnoDB DEFAULT CHARSET=latin1" do |t|
t.integer "capacity", null: false
t.float "rate", limit: 24, null: false
end
create_table "Stay", primary_key: ["inDate", "outDate"], force: :cascade, options: "ENGINE=InnoDB DEFAULT CHARSET=latin1" do |t|
t.date "inDate", null: false
t.date "outDate", null: false
end
create_table "User", primary_key: "username", id: :string, limit: 1, force: :cascade, options: "ENGINE=InnoDB DEFAULT CHARSET=latin1" do |t|
t.integer "points", null: false
end
add_foreign_key "Bill", "Reservation", column: "confirmationNo", primary_key: "confirmationNo", name: "Bill_ibfk_1"
add_foreign_key "Customer", "User", column: "username", primary_key: "username", name: "Customer_ibfk_1"
add_foreign_key "Reservation", "Customer", column: "creditCardNo", primary_key: "creditCardNo", name: "Reservation_ibfk_3"
add_foreign_key "Reservation", "Room", column: "roomNo", primary_key: "roomNo", name: "Reservation_ibfk_1"
add_foreign_key "Reservation", "Stay", column: "inDate", primary_key: "inDate", name: "Reservation_ibfk_2", on_delete: :cascade
add_foreign_key "Reservation", "Stay", column: "outDate", primary_key: "outDate", name: "Reservation_ibfk_2", on_delete: :cascade
add_foreign_key "Room", "Roomtype", column: "roomType", primary_key: "roomType", name: "Room_ibfk_1"
end
end
def self.down
# drop all the tables if you really need
# to support migration back to version 0
end
end
건배
도움 주셔서 감사합니다. 나는 이것을 시도했지만 불행히도 효과가 없었다. 문제를 진단하는 데 사용할 수있는 원래 게시물에 포함되지 않은 것이 있습니까? – jfwerbes
"마이그레이션 보류 중"오류가 사라졌습니까? – tronmcp