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# See http://doc.gitlab.com/ce/development/migration_style_guide.html
# for more information on how to write migrations for GitLab.
class <%= migration_class_name %> < ActiveRecord::Migration
include Gitlab::Database::MigrationHelpers
# Set this constant to true if this migration requires downtime.
DOWNTIME = false
# When a migration requires downtime you **must** uncomment the following
# constant and define a short and easy to understand explanation as to why the
# migration requires downtime.
# DOWNTIME_REASON = ''
# When using the methods "add_concurrent_index", "remove_concurrent_index" or
# "add_column_with_default" you must disable the use of transactions
# as these methods can not run in an existing transaction.
# When using "add_concurrent_index" or "remove_concurrent_index" methods make sure
# that either of them is the _only_ method called in the migration,
# any other changes should go in a separate migration.
# This ensures that upon failure _only_ the index creation or removing fails
# and can be retried or reverted easily.
#
# To disable transactions uncomment the following line and remove these
# comments:
# disable_ddl_transaction!
<%- if migration_action == 'add' -%>
def change
<% attributes.each do |attribute| -%>
<%- if attribute.reference? -%>
add_reference :<%= table_name %>, :<%= attribute.name %><%= attribute.inject_options %>
<%- else -%>
add_column :<%= table_name %>, :<%= attribute.name %>, :<%= attribute.type %><%= attribute.inject_options %>
<%- if attribute.has_index? -%>
add_index :<%= table_name %>, :<%= attribute.index_name %><%= attribute.inject_index_options %>
<%- end -%>
<%- end -%>
<%- end -%>
end
<%- elsif migration_action == 'join' -%>
def change
create_join_table :<%= join_tables.first %>, :<%= join_tables.second %> do |t|
<%- attributes.each do |attribute| -%>
<%= '# ' unless attribute.has_index? -%>t.index <%= attribute.index_name %><%= attribute.inject_index_options %>
<%- end -%>
end
end
<%- else -%>
def change
<% attributes.each do |attribute| -%>
<%- if migration_action -%>
<%- if attribute.reference? -%>
remove_reference :<%= table_name %>, :<%= attribute.name %><%= attribute.inject_options %>
<%- else -%>
<%- if attribute.has_index? -%>
remove_index :<%= table_name %>, :<%= attribute.index_name %><%= attribute.inject_index_options %>
<%- end -%>
remove_column :<%= table_name %>, :<%= attribute.name %>, :<%= attribute.type %><%= attribute.inject_options %>
<%- end -%>
<%- end -%>
<%- end -%>
end
<%- end -%>
end
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