psql未定义表，关系不存在

Question

/Users/0okyleo0/.gem/ruby/2.1.2/gems/activerecord-4.1.2/lib/active_record/connection_adapters/postgresql_adapter.rb:822:in `async_exec': PG::UndefinedTable: ERROR:  relation "events" does not exist (ActiveRecord::StatementInvalid)
LINE 5:                WHERE a.attrelid = '"events"'::regclass
                                      ^

每次我尝试打开红宝石终端菜单进行测试时，都会出现此问题吗？ 我正在活动记录中。 每当我尝试使用一种将事件添加到数据库的方法时，都会收到此错误。

def add_event
    puts "What is your event's name?\n\n"
    event_name = gets.chomp
    puts "What is your event's location?\n\n"
    event_location = gets.chomp
    puts "What is your start date? example: 1990-11-16\n\n"
    event_start_date = gets.chomp
    puts "What is your end date? example: 1990-11-19\n\n"
    event_end_date = gets.chomp
    Event.create({name: event_name, location: event_location,
        start_date: event_start_date, end_date: event_end_date})
    puts "#{name} has been added!"
end

这是我的模式-

ActiveRecord::Schema.define(version: 20140830232637) do

  # These are extensions that must be enabled in order to support this database
  enable_extension "plpgsql"

  create_table "event_tables", force: true do |t|
    t.string   "name"
    t.string   "location"
    t.datetime "start_date"
    t.datetime "end_date"
    t.datetime "created_at"
    t.datetime "updated_at"
  end
end

Answer 1

您正在使用一个名为Event的模型类：

Event.create({name: event_name, location: event_location,
        start_date: event_start_date, end_date: event_end_date})

除非您另外配置了该表，否则该表要使用称为events的表。 但是您已经创建了一个名为event_tables的表：

create_table "event_tables", force: true do |t|
  ..
end

您应该使用称为events的表或称为EventTable的模型。