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Active Record Database Hash Config

A HashConfig object is created for each database configuration entry that is created from a hash.

A hash config:

{ "development" => { "database" => "db_name" } }

Becomes:

#<ActiveRecord::DatabaseConfigurations::HashConfig:0x00007fd1acbded10
  @env_name="development", @name="primary", @config={database: "db_name"}>

See ActiveRecord::DatabaseConfigurations for more info.

Methods
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Attributes

[R] configuration_hash

Class Public methods

new(env_name, name, configuration_hash)

Initialize a new HashConfig object

Options

  • :env_name - The Rails environment, i.e. “development”.

  • :name - The db config name. In a standard two-tier database configuration this will default to “primary”. In a multiple database three-tier database configuration this corresponds to the name used in the second tier, for example “primary_readonly”.

  • :config - The config hash. This is the hash that contains the database adapter, name, and other important information for database connections.

Source: show 

# File activerecord/lib/active_record/database_configurations/hash_config.rb, line 36
def initialize(env_name, name, configuration_hash)
  super(env_name, name)
  @configuration_hash = configuration_hash.symbolize_keys.freeze
end

Instance Public methods

adapter()

Source: show 

# File activerecord/lib/active_record/database_configurations/hash_config.rb, line 106
def adapter
  configuration_hash[:adapter]
end

checkout_timeout()

Source: show 

# File activerecord/lib/active_record/database_configurations/hash_config.rb, line 91
def checkout_timeout
  (configuration_hash[:checkout_timeout] || 5).to_f
end

database()

Source: show 

# File activerecord/lib/active_record/database_configurations/hash_config.rb, line 63
def database
  configuration_hash[:database]
end

default_schema_cache_path()

Source: show 

# File activerecord/lib/active_record/database_configurations/hash_config.rb, line 117
def default_schema_cache_path
  "db/schema_cache.yml"
end

host()

Source: show 

# File activerecord/lib/active_record/database_configurations/hash_config.rb, line 55
def host
  configuration_hash[:host]
end

idle_timeout()

Source: show 

# File activerecord/lib/active_record/database_configurations/hash_config.rb, line 101
def idle_timeout
  timeout = configuration_hash.fetch(:idle_timeout, 300).to_f
  timeout if timeout > 0
end

lazy_schema_cache_path()

Source: show 

# File activerecord/lib/active_record/database_configurations/hash_config.rb, line 121
def lazy_schema_cache_path
  schema_cache_path || default_schema_cache_path
end

max_queue()

Source: show 

# File activerecord/lib/active_record/database_configurations/hash_config.rb, line 87
def max_queue
  max_threads * 4
end

max_threads()

Source: show 

# File activerecord/lib/active_record/database_configurations/hash_config.rb, line 79
def max_threads
  (configuration_hash[:max_threads] || pool).to_i
end

migrations_paths()

The migrations paths for a database configuration. If the migrations_paths key is present in the config, migrations_paths will return its value.

Source: show 

# File activerecord/lib/active_record/database_configurations/hash_config.rb, line 51
def migrations_paths
  configuration_hash[:migrations_paths]
end

min_threads()

Source: show 

# File activerecord/lib/active_record/database_configurations/hash_config.rb, line 75
def min_threads
  (configuration_hash[:min_threads] || 0).to_i
end

pool()

Source: show 

# File activerecord/lib/active_record/database_configurations/hash_config.rb, line 71
def pool
  (configuration_hash[:pool] || 5).to_i
end

query_cache()

Source: show 

# File activerecord/lib/active_record/database_configurations/hash_config.rb, line 83
def query_cache
  configuration_hash[:query_cache]
end

reaping_frequency()

reaping_frequency is configurable mostly for historical reasons, but it could also be useful if someone wants a very low idle_timeout.

Source: show 

# File activerecord/lib/active_record/database_configurations/hash_config.rb, line 97
def reaping_frequency
  configuration_hash.fetch(:reaping_frequency, 60)&.to_f
end

replica?()

Determines whether a database configuration is for a replica / readonly connection. If the replica key is present in the config, replica? will return true.

Source: show 

# File activerecord/lib/active_record/database_configurations/hash_config.rb, line 44
def replica?
  configuration_hash[:replica]
end

schema_cache_path()

The path to the schema cache dump file for a database. If omitted, the filename will be read from ENV or a default will be derived.

Source: show 

# File activerecord/lib/active_record/database_configurations/hash_config.rb, line 113
def schema_cache_path
  configuration_hash[:schema_cache_path]
end

schema_dump(format = ActiveRecord.schema_format)

Determines whether to dump the schema/structure files and the filename that should be used.

If configuration_hash[:schema_dump] is set to false or nil the schema will not be dumped.

If the config option is set that will be used. Otherwise Rails will generate the filename from the database config name.

Source: show 

# File activerecord/lib/active_record/database_configurations/hash_config.rb, line 137
def schema_dump(format = ActiveRecord.schema_format)
  if configuration_hash.key?(:schema_dump)
    if config = configuration_hash[:schema_dump]
      config
    end
  elsif primary?
    schema_file_type(format)
  else
    "#{name}_#{schema_file_type(format)}"
  end
end