Error when updating the user from a form

ActiveRecord::RecordInvalid (Validation failed: Password confirmation can’t be blank, Password is too short (minimum is 4 characters), Password can’t be blank):

Suggestion

It’s probably because of the restrictions on the User model (attr_accessible or attr_protected, in particular). But allowing users access to any part of the User model via mass assignment is dangerous. That’s why many people create a separate Profile model and link it via a 1:1 (belongs_to, has_one) relationship.

Solution

Coming soon

This is what I had to do to get it to work on CentOS 5. For some reason, FreeType would not work with yum so I built it from scratch. I’m not sure if the all the “yum install”s were needed, but I did it anyway.

#yum install freetype — did not work

cd /usr/local/src

wget http://download.savannah.gnu.org/releases/freetype/freetype-2.3.5.tar.gz

tar xvzf freetype-2.3.5.tar.gz

./configure

make

make install

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Install

After installing PostgreSQL on Windows, I converted my Rails application from MySQL to PostgreSQL with the following steps:

1. Create a new database in PostgreSQL
2. Installed postgres-pr gem (Ruby driver) because the postgres gem (native driver) didn’t work. Will figure out why later on.
3. Changed the appropriate Rails config stuff in database.yml

   development:
     adapter: postgresql
     database: database_name
     username: postgres
     password: password
     host: localhost

4. I ran only my first Rails migration to test that it worked using this command: rake db:migrate VERSION=1. My first migration (001_create_heartrates.rb) creates a table in the database so it will be easy to test.

Robby explains a quick way to migrate the data as well

Test

You can test that the migration worked via 2 methods (GUI or command line)

1. Using following commands with the psql command line utility (Start Menu -> PostgreSQL -> psql to postgres):
   

   psql commmand	Description
   \?	help
   \c database_name	connect to a database (many other commands won’t work until you execute this)
   \dt	show tables (execute \c first)
   \d table_name	describes a particular table (e.g. table_name)

2. Using the pgAdmin III GUI:
   • The database table is deeply nested in the tree, I missed it at first. Go to PostgreSQL Database Server 8.2 -> Databases -> database_name -> Schemas -> public -> Tables -> table_name

I wanted to quickly create a new database via pgAdmin III, so I used the following properties

Note: initdb (which ran during step 6 of the installation process) creates two initial databases, namely postgres and template1. Also, the cluster created by initdb also comes with two templates (template0 and template1). template0 is a backup for template1.