使用mysql在RDS上的db：schema：dump。 错误：由于以下针对“ int（11）”的未定义方法“类型”，无法转储表“”：字符串

Question

Setup:

rails: 4.2.5.1
ruby: 2.2.4p230 (2015-12-16 revision 53155) [i386-mingw32]
windows 7 environment

database.yml:

default: &default
  adapter: mysql2
  encoding: utf8
  database: "database"
  username: "name"
  password: "password"
  host: "host"
  port: 3306 

development:
  adapter: mysql2
  encoding: utf8
  database: "database"
  username: "name"
  password: "password"
  host: "host"
  port: 3306

I am trying to use an existing mysql database on RDS. I created a new project using
rails new "app" and then attempted to get the database schema. When I run
ruby bin\\rake db:schema:dump the output in my schema.rb file is filled with the same error for every table in the database:

ActiveRecord::Schema.define() do
# Could not dump table "test" because of following NoMethodError
#   undefined method `type' for "int(11)":String
end

I first thought that maybe it was because int(11) was a 64 bit integer, but later learned that the "11" in int(11) refers to the display size, and that it is still a 32 bit integer.

Can anyone explain why this is happening or why ruby doesn't recognize the 32 bit integer type for the primary key column.

Answer 1

i think you have a field named "type" in your database. "type" is a reserved word in rails(sepecially for database).

Solution : change the name of this field

Ex: "type" => "typemore"

check this

Answer 2

I managed to get rid of this error by making the following changes to my Gemfile.

gem 'mysql2', '~>0.3.13'
#gem 'activerecord-mysql2-adapter'

Then I ran bundle install to update my gems.

I am still not sure why this worked.