Sha256: dc30da1fea142fc1b23daeb6a807144feae8fcba7246b73fd8cefc0c8b521a48
Contents?: true
Size: 1.81 KB
Versions: 3
Compression:
Stored size: 1.81 KB
Contents
# This migration creates the `versions` table, the only schema PT requires.
# All other migrations PT provides are optional.
class CreateVersions < ActiveRecord::Migration<%= migration_version %>
# The largest text column available in all supported RDBMS is
# 1024^3 - 1 bytes, roughly one gibibyte. We specify a size
# so that MySQL will use `longtext` instead of `text`. Otherwise,
# when serializing very large objects, `text` might not be big enough.
TEXT_BYTES = 1_073_741_823
def change
create_table :versions<%= versions_table_options %><%= version_table_primary_key_type %> do |t|
# Consider using bigint type for performance if you are going to store only numeric ids.
# t.bigint :whodunnit
t.string :whodunnit
# Known issue in MySQL: fractional second precision
# -------------------------------------------------
#
# MySQL timestamp columns do not support fractional seconds unless
# defined with "fractional seconds precision". MySQL users should manually
# add fractional seconds precision to this migration, specifically, to
# the `created_at` column.
# (https://dev.mysql.com/doc/refman/5.6/en/fractional-seconds.html)
#
# MySQL users should also upgrade to at least rails 4.2, which is the first
# version of ActiveRecord with support for fractional seconds in MySQL.
# (https://github.com/rails/rails/pull/14359)
#
# MySQL users should use the following line for `created_at`
# t.datetime :created_at, limit: 6
t.datetime :created_at
t.<%= item_id_type_options %> :item_id, null: false
t.string :item_type<%= item_type_options %>
t.string :event, null: false
t.text :object, limit: TEXT_BYTES
end
add_index :versions, %i[item_type item_id]
end
end
Version data entries
3 entries across 3 versions & 2 rubygems