PostgreSQL gem pg was unable to install

Question

My DB is PostgreSQL.I am on CENTOS.... While installing the pg gem I received the following error. I reinstalled to clear my YAML problem also, which didn\'t work, but it is jus

Answer 1

My problem is before pg gem was already installed.. but it is not loading to bundle.. Now the solution is: when we are declaring a new application like 'rails new Demo' we have to include

'--database=postgresql'. so now the total command is: 'rails new Demo --database=postgresql'

Then the pg gem file will gets to bundle..

In bundle only one gem will gets store . either pg gem or sqlite3 gem..

Now edit the database.yml file accordingly.. thats it