Ruby on Rails mysql迁移使用时区而不是日期时间

Question

I am keeping in my mysql table a column called

starts_at

my column can be with a different timezone each time.

I have tried creating a migration:

def self.up
    create_table :meetings, id: false, force: true do |t|
         t.string       :id
         t.timestamp    :starts_at
    end
end

but i always end up with a

datetime

column type

i want to force rails to use timestamp , and tried all of these with with no success :

def up
    change_column :meetings, :starts_at, :timestamp
end

this:

def up
    change_column :meetings, :starts_at, 'timestamp'
end

and this:

 def self.up
    create_table :meetings, id: false, force: true do |t|
         t.string       :id
         t.column       :starts_at, 'timestamp'
    end
end

any ideas?

update:

i want to save the timezone on the database record and not on the application configuration

Answer 1

Rails actually makes some of decisions for you. Both :timestamp and :datetime will default to DATETIME , while :date and :time corresponds to DATE and TIME , respectively.

Using Rails, you only have to decide whether you need to store date, time or both.

So you can use type :datetime in your :starts_at column.

Answer 2

Look at this example in config/application.rb

class Application < Rails::Application
   config.time_zone = 'Sydney'
   config.time_zone = 'Kuala Lumpur'
   config.active_record.default_timezone = 'Kuala Lumpur'
end

You can set your Time zone according to requirement and you can make it dynamic.

Here is all timezone ActiveSupport::TimeZone.all.map(&:name)