我的应用程序完全适用于开发,但当我尝试在Heroku上提供它时,我收到以下错误:
PG::UndefinedTable: ERROR: relation "users" does not exist
: CREATE TABLE "games" ("id" serial primary key, "title" character varying, "image" character varying, "description" character varying, "user_id" integer, "created_at" timestamp NOT NULL, "updated_at" timestamp NOT NULL, CONSTRAINT "fk_rails_de9e6ea7f7"
FOREIGN KEY ("user_id")
REFERENCES "users" ("id")
)
当我尝试运行heroku rake db:drop, heroku rake db:reset, heroku rake db:migrate
时会出现该错误。
这是我的数据库架构:
ActiveRecord::Schema.define(version: 20170305021159) do
create_table "comments", force: :cascade do |t|
t.string "body"
t.integer "user_id"
t.integer "game_id"
t.datetime "created_at", null: false
t.datetime "updated_at", null: false
t.index ["game_id"], name: "index_comments_on_game_id"
t.index ["user_id"], name: "index_comments_on_user_id"
end
create_table "games", force: :cascade do |t|
t.string "title"
t.string "image"
t.string "description"
t.integer "user_id"
t.datetime "created_at", null: false
t.datetime "updated_at", null: false
t.string "image_file_name"
t.string "image_content_type"
t.integer "image_file_size"
t.datetime "image_updated_at"
t.index ["user_id"], name: "index_games_on_user_id"
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
这是我的环境:
Rails version 5.0.2
Ruby version 2.3.1-p112 (x86_64-linux-gnu)
RubyGems version 2.5.1
Rack version 2.0.1
JavaScript Runtime Node.js (V8)
此项目是使用rails 4创建的,后来更新为rails 5。
如何在Heroku中迁移我的数据库?
感谢阅读。
答案 0 :(得分:3)
建议的方法是运行
heroku rake db:schema:load
因为它将工作模式从开发数据库加载到生产服务器。不建议使用迁移,这来自官方指南
迁移,尽管可能很强大,但并不是权威来源 对于您的数据库架构。该角色属于db / schema.rb或 Active Record通过检查数据库生成的SQL文件。他们 不是为了编辑而设计的,它们只代表当前的状态 数据库。
http://edgeguides.rubyonrails.org/active_record_migrations.html#schema-dumping-and-you