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PORails: rake db:create:all fails to connect to PostgreSQL database
 

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  1. PORails: rake db:create:all fails to connect to PostgreSQL database
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    <p>I am trying to create a Rails app that uses PostgreSQL. Here is a description of what I did.</p> <hr> <p><strong>PostgreSQL setup:</strong><br> I installed PostgreSQL 9.1.3 via the <a href="https://launchpad.net/~pitti/+archive/postgresql" rel="noreferrer">ppa:pitti/postgresql</a> maintained by Martin Pitt. There was PostgreSQL 8.4 installed before; I am not sure if it is still installed or gone.</p> <ul> <li>I added a database user with superuser rights to the database that has the same name as my Ubuntu account.</li> <li>I start the database daemon with <code>sudo service postgresql start</code>.</li> <li>I installed <a href="http://pgadmin.org" rel="noreferrer">pgadmin3, Version 1.14.0 Beta 1</a> via <a href="https://launchpad.net/~rhonda/+archive/pgadmin3" rel="noreferrer">ppa:rhonda/pgadmin3</a> maintained by Gerfried Fuchs.</li> <li>I can connect via pgadmin3 using my user account and password and port 5433.</li> </ul> <p>My postgres configuration in <em>pg_hba.conf</em> is as follows (removed comments for readability).</p> <pre><code>[...] local all postgres peer local all all peer host all all 127.0.0.1/32 md5 host all all ::1/128 md5 </code></pre> <hr> <p><strong>Rails setup:</strong><br> Now I want to create a Rails application that uses PostgreSQL.</p> <ul> <li>I installed Ruby 1.9.3-p125 via RVM.</li> <li>I installed Rails 3.2.3 into the Gemset ruby-1.9.3-p125@global.</li> <li>I created a .rvmrc and Gemset for the application.</li> <li>I created a Rails application via <code>rails new my_test_app -d postgresql</code>.</li> <li>I configured the <code>user</code> name and <code>password</code> in <em>config/database.yml</em> for <em>development</em> and <em>test</em> and removed <em>production</em>.</li> <li>I configured <code>host: localhost</code> and <code>port: 5433</code> in <em>config/database.yml</em>.</li> </ul> <p>Here is the content of my <em>config/database.yml</em> (removed comments for readability).</p> <pre><code>development: adapter: postgresql encoding: unicode database: my_test_app_development pool: 5 username: johndoe password: password host: localhost port: 5433 test: adapter: postgresql encoding: unicode database: my_test_app_test pool: 5 username: johndoe password: password </code></pre> <hr> <p><strong>Problem:</strong><br> However, when I run <code>bundle exec rake db:create:all</code> I receive the following error message.</p> <pre><code>could not connect to server: No such file or directory Is the server running locally and accepting connections on Unix domain socket "/var/run/postgresql/.s.PGSQL.5432"? [...] Couldn't create database for {"adapter"=&gt;"postgresql", "encoding"=&gt;"unicode", "database"=&gt;"my_test_app_test", "pool"=&gt;5, "username"=&gt;"johndoe", "password"=&gt;"password"} </code></pre> <hr> <p><strong>Question:</strong><br> Why is the port different to the one I use when I successfully connect via pgadmin3?</p>
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    1. CORails app tries to connect through UNIX socket instead of TCP socket localhost:5433. It mustn't behave so if you setup database.yml properly. Check contents of database.yml and ensure that rails does read this file. Please provide contents of database.yml. You also can try to use different adapter (sqlite, for example) to test if your settings applies.
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    2. CODoes that mean I should not use port 5433 but 5432 which was in *database.yml* as a uncommented line?
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    3. COFor are those who install PG via Homebrew and are having problems, I found another answer. Just uninstall pg gem and reinstall with Homebrew configs. See the answer at http://stackoverflow.com/a/19609228/1072058.
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