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

First install

sudo apt-get install postgresql postgresql-server-dev-9.1

Next install

sudo apt-get install libpq-dev

Then install gem install pg

Answer 2

I got the same problem and I tried to install all dependencies, but all is useless. In the end, I had a try to use PostgreSQL9.3, not PostgreSQL9.4, and everything is fine.

Answer 3

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

Answer 4

Try This, the answer is not mine but it worked for me. Remember to point to where your Postgres.app application is:

bundle config build.pg --with-pg-config=/Applications/Postgres.app/Contents/MacOS/bin/pg_config

Then do

bundle update
bundle install