class AddOpenAttributeToCourses < ActiveRecord::Migration
def change
add_column :courses, :open, :boolean
change_column_default(:courses, :open, {:from=>true, :to=>false})
end
end
!!!!!then Operation!!!!!!
rake db:migrate
== 20161126133112 AddOpenAttributeToCourses: migrating ========================
-- add_column(:courses, :open, :boolean)
-> 0.1047s
-- change_column_default(:courses, :open, {:from=>true, :to=>false})
rake aborted!
StandardError: An error has occurred, this and all later migrations canceled:
PG::InvalidTextRepresentation: ERROR: invalid input syntax for type boolean: "---
:from: true
:to: false
"
: ALTER TABLE "courses" ALTER COLUMN "open" SET DEFAULT '---
:from: true
:to: false
'
/usr/local/rvm/gems/ruby-2.3.0/gems/activerecord-4.2.5.2/lib/active_record/connection_adapters/postgresql/database_statements.rb:155:in `async_exec'
/usr/local/rvm/gems/ruby-2.3.0/gems/activerecord-4.2.5.2/lib/active_record/connection_adapters/postgresql/database_statements.rb:155:in `block in execute'
/usr/local/rvm/gems/ruby-2.3.0/gems/activerecord-4.2.5.2/lib/active_record/connection_adapters/abstract_adapter.rb:472:in `block in log'
/usr/local/rvm/gems/ruby-2.3.0/gems/activesupport-4.2.5.2/lib/active_support/notifications/instrumenter.rb:20:in `instrument'
/usr/local/rvm/gems/ruby-2.3.0/gems/activerecord-4.2.5.2/lib/active_record/connection_adapters/abstract_adapter.rb:466:in `log'
/usr/local/rvm/gems/ruby-2.3.0/gems/activerecord-4.2.5.2/lib/active_record/connection_adapters/postgresql/database_statements.rb:154:in `execute'
/usr/local/rvm/gems/ruby-2.3.0/gems/activerecord-4.2.5.2/lib/active_record/connection_adapters/postgresql/schema_statements.rb:455:in `change_column_default'
/usr/local/rvm/gems/ruby-2.3.0/gems/activerecord-4.2.5.2/lib/active_record/migration.rb:665:in `block in method_missing'
/usr/local/rvm/gems/ruby-2.3.0/gems/activerecord-4.2.5.2/lib/active_record/migration.rb:634:in `block in say_with_time'
/usr/local/rvm/gems/ruby-2.3.0/gems/activerecord-4.2.5.2/lib/active_record/migration.rb:634:in `say_with_time'
/usr/local/rvm/gems/ruby-2.3.0/gems/activerecord-4.2.5.2/lib/active_record/migration.rb:654:in `method_missing'
/home/ubuntu/workspace/db/migrate/20161126133112_add_open_attribute_to_courses.rb:4:in `change'
/usr/local/rvm/gems/ruby-2.3.0/gems/activerecord-4.2.5.2/lib/active_record/migration.rb:608:in `exec_migration'
/usr/local/rvm/gems/ruby-2.3.0/gems/activerecord-4.2.5.2/lib/active_record/migration.rb:592:in `block (2 levels) in migrate'
/usr/local/rvm/gems/ruby-2.3.0/gems/activerecord-4.2.5.2/lib/active_record/migration.rb:591:in `block in migrate'
/usr/local/rvm/gems/ruby-2.3.0/gems/activerecord-4.2.5.2/lib/active_record/connection_adapters/abstract/connection_pool.rb:292:in `with_connection'
/usr/local/rvm/gems/ruby-2.3.0/gems/activerecord-4.2.5.2/lib/active_record/migration.rb:590:in `migrate'
/usr/local/rvm/gems/ruby-2.3.0/gems/activerecord-4.2.5.2/lib/active_record/migration.rb:768:in `migrate'
/usr/local/rvm/gems/ruby-2.3.0/gems/activerecord-4.2.5.2/lib/active_record/migration.rb:998:in `block in execute_migration_in_transaction'
/usr/local/rvm/gems/ruby-2.3.0/gems/activerecord-4.2.5.2/lib/active_record/migration.rb:1044:in `block in ddl_transaction'
/usr/local/rvm/gems/ruby-2.3.0/gems/activerecord-4.2.5.2/lib/active_record/connection_adapters/abstract/database_statements.rb:213:in `block in transaction'
/usr/local/rvm/gems/ruby-2.3.0/gems/activerecord-4.2.5.2/lib/active_record/connection_adapters/abstract/transaction.rb:184:in `within_new_transaction'
/usr/local/rvm/gems/ruby-2.3.0/gems/activerecord-4.2.5.2/lib/active_record/connection_adapters/abstract/database_statements.rb:213:in `transaction'
/usr/local/rvm/gems/ruby-2.3.0/gems/activerecord-4.2.5.2/lib/active_record/transactions.rb:220:in `transaction'
/usr/local/rvm/gems/ruby-2.3.0/gems/activerecord-4.2.5.2/lib/active_record/migration.rb:1044:in `ddl_transaction'
/usr/local/rvm/gems/ruby-2.3.0/gems/activerecord-4.2.5.2/lib/active_record/migration.rb:997:in `execute_migration_in_transaction'
/usr/local/rvm/gems/ruby-2.3.0/gems/activerecord-4.2.5.2/lib/active_record/migration.rb:959:in `block in migrate'
/usr/local/rvm/gems/ruby-2.3.0/gems/activerecord-4.2.5.2/lib/active_record/migration.rb:955:in `each'
/usr/local/rvm/gems/ruby-2.3.0/gems/activerecord-4.2.5.2/lib/active_record/migration.rb:955:in `migrate'
/usr/local/rvm/gems/ruby-2.3.0/gems/activerecord-4.2.5.2/lib/active_record/migration.rb:823:in `up'
/usr/local/rvm/gems/ruby-2.3.0/gems/activerecord-4.2.5.2/lib/active_record/migration.rb:801:in `migrate'
/usr/local/rvm/gems/ruby-2.3.0/gems/activerecord-4.2.5.2/lib/active_record/tasks/database_tasks.rb:137:in `migrate'
/usr/local/rvm/gems/ruby-2.3.0/gems/activerecord-4.2.5.2/lib/active_record/railties/databases.rake:44:in `block (2 levels) in <top (required)>'
/usr/local/rvm/gems/ruby-2.3.0/gems/rake-11.2.2/exe/rake:27:in `<top (required)>'
ActiveRecord::StatementInvalid: PG::InvalidTextRepresentation: ERROR: invalid input syntax for type boolean: "---
:from: true
:to: false
"