Added custom migration generator templates

This allows us to automatically include
Gitlab::Database::MigrationHelpers into newly generated migrations.
parent e8670990
class <%= migration_class_name %> < ActiveRecord::Migration
include Gitlab::Database::MigrationHelpers
# When using the methods "add_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" make sure that this
# method 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 failes and can be re-tried or reverted easily.
#
# To disable transactions uncomment the following line and remove these
# comments:
# disable_ddl_transaction!
def change
create_table :<%= table_name %> do |t|
<% attributes.each do |attribute| -%>
<% if attribute.password_digest? -%>
t.string :password_digest<%= attribute.inject_options %>
<% else -%>
t.<%= attribute.type %> :<%= attribute.name %><%= attribute.inject_options %>
<% end -%>
<% end -%>
<% if options[:timestamps] %>
t.timestamps null: false
<% end -%>
end
<% attributes_with_index.each do |attribute| -%>
add_index :<%= table_name %>, :<%= attribute.index_name %><%= attribute.inject_index_options %>
<% end -%>
end
end
class <%= migration_class_name %> < ActiveRecord::Migration
include Gitlab::Database::MigrationHelpers
# When using the methods "add_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" make sure that this
# method 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 failes and can be re-tried 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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