我正在运行Rails 3.2.17和Postgres 9.3.4.我使用"rails generate"创建了一个新的ActiveRecord模型,其中一种列类型是json.我的意图是在Postgres中使用json列类型.
db迁移包含以下代码:
class CreateThing < ActiveRecord::Migration
def change
create_table :things do |t|
t.integer :user_id
t.json :json_data
t.timestamps
end
add_index :things, :user_id
end
end
当我try 使用"rake db:migrate"进行迁移时,会出现以下错误:
-- create_table(:things)
rake aborted!
StandardError: An error has occurred, this and all later migrations canceled:
undefined method `json' for #<ActiveRecord::ConnectionAdapters::PostgreSQLAdapter::TableDefinition:0x007fea3d465af8>/Users/../db/migrate/20140425030855_create_things.rb:7:in `block in change'
/Library/Ruby/Gems/2.0.0/gems/activerecord-3.2.17/lib/active_record/connection_adapters/abstract/schema_statements.rb:160:in `create_table'
这是向ActiveRecord添加json列的正确方法吗?我找不到任何文档或示例.谢谢