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The databases.yml configuration allows for the configuration of the database connection. It is used by both ORMs bundled with symfony: Propel and Doctrine.

The main databases.yml configuration file for a project can be found in the config/ directory.

Most of the time, all applications of a project share the same database. That's why the main database configuration file is in the project config/ directory. You can of course override the default configuration by defining a databases.yml configuration file in your application configuration directories.

As discussed in the introduction, the databases.yml file is environment-aware, benefits from the configuration cascade mechanism, and can include constants.

Each connection described in databases.yml must include a name, a database handler class name, and a set of parameters (param) used to configure the database object:

CONNECTION_NAME:
  class: CLASS_NAME
  param: { ARRAY OF PARAMETERS }

The class name should extend the sfDatabase base class.

If the database handler class cannot be autoloaded, a file path can be defined and will be automatically included before the factory is created:

CONNECTION_NAME:
  class: CLASS_NAME
  file:  ABSOLUTE_PATH_TO_FILE

The databases.yml configuration file is cached as a PHP file; the process is automatically managed by the sfDatabaseConfigHandler class.

The database configuration can also be configured by using the database:configure task. This task updates the databases.yml according to the arguments you pass to it.

Propel

Default Configuration:

dev:
  propel:
    param:
      classname:  DebugPDO
 
test:
  propel:
    param:
      classname:  DebugPDO
 
all:
  propel:
    class:        sfPropelDatabase
    param:
      classname:  PropelPDO
      dsn:        mysql:dbname=##PROJECT_NAME##;host=localhost
      username:   root
      password:   
      encoding:   utf8
      persistent: true
      pooling:    true

The following parameters can be customized under the param section:

Doctrine

Default Configuration:

all:
  doctrine:
    class:        sfDoctrineDatabase
    param:
      dsn:        mysql:dbname=##PROJECT_NAME##;host=localhost
      username:   root
      password:   
      attributes:
        quote_identifier: false
        use_native_enum: false
        validate: all
        idxname_format: %s_idx
        seqname_format: %s_seq
        tblname_format: %s

The following parameters can be customized under the param section:

The following attributes can be customized under the attributes section: