尝试使用PostgreSQL在Rails 4中创建json对象数组时出错

I'm trying to add a array of json-objects into one of my models. Running the migration works fine, as long as I don't include a default value, but trying to store any value results in a crash. When trying to use a empty array as default value, the same crash occurs when running the migration.I'm trying to add a array of json-objects into