# Database configuration specifies nonexistent postgresql adapter

**URL:** <https://www.ruby-forum.com/t/database-configuration-specifies-nonexistent-postgresql-adapter/117033>\
**Category:** Rails\
**Created:** [October 12, 2007, 8:35am UTC](https://www.ruby-forum.com/t/database-configuration-specifies-nonexistent-postgresql-adapter/117033 "2007-10-12T08:35:19Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![CCH](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/c/898d66/32.png) [@CCH](https://www.ruby-forum.com/u/CCH)\
**Post date:** [October 12, 2007, 8:35am UTC](https://www.ruby-forum.com/t/database-configuration-specifies-nonexistent-postgresql-adapter/117033/1 "2007-10-12T08:35:19Z")

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Hi

I am trying to get RoR to work with Postgresql 8,2.5 (latest stable  
version)  
Steps taken

1. Download Postgresql 1.82 and installed successfully
2. Edited my Database.yml

development:  
adapter: postgresql  
database: test\_development  
username: postgres  
password: xxx  
host: localhost

test:  
adapter: postgresql  
database: test\_test  
username: postgres  
password: xxx  
host: localhost

production:  
adapter: postgres  
database: test\_production  
username: root  
password: xxx  
host: localhost

I had earlier created an appropriate migration file  
then rake db:migrate

Result :

rake aborted!  
database configuration specifies nonexistent postgresql adapter

I then use gem install postgres-pr  
Then rake db:migrate

Result : same error message

rake aborted!  
database configuration specifies nonexistent postgresql adapter ☹

Any assistance would be appreciated !

TIA.

---

<div class="post-metadata">

**Author:** ![CCH](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/c/898d66/32.png) [@CCH](https://www.ruby-forum.com/u/CCH)\
**Post date:** [October 12, 2007, 3:16pm UTC](https://www.ruby-forum.com/t/database-configuration-specifies-nonexistent-postgresql-adapter/117033/2 "2007-10-12T15:16:54Z")

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On Oct 12, 2007, at 1:34 , CCH wrote:

> development:  
> adapter: postgresql

> test:  
> adapter: postgresql

> production:  
> adapter: postgres

Something isn’t consistent here.

> rake aborted!  
> database configuration specifies nonexistent postgresql adapter

Michael G.  
grzm seespotcode net