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Class: ActiveRecord::DatabaseConfigurations::HashConfig

Relationships & Source Files
Extension / Inclusion / Inheritance Descendants
Subclasses:
UrlConfig
Super Chains via Extension / Inclusion / Inheritance
Class Chain:
self, DatabaseConfig
Instance Chain:
self, DatabaseConfig
Inherits: ActiveRecord::DatabaseConfigurations::DatabaseConfig
Defined in: activerecord/lib/active_record/database_configurations/hash_config.rb

Overview

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.

Class Method Summary

DatabaseConfig - Inherited

.new

Instance Attribute Summary

DatabaseConfig - Inherited

#_database=, #env_name, #for_current_env?, #name, #replica?, #seeds?, #use_metadata_table?

Instance Method Summary

DatabaseConfig - Inherited

#adapter, #adapter_class, #checkout_timeout, #database, #host, #idle_timeout, #inspect, #max_queue, #max_threads, #migrations_paths, #min_threads, #new_connection, #pool, #query_cache, #reaping_frequency, #schema_cache_path, #validate!

Constructor Details

.new(env_name, name, configuration_hash) ⇒ HashConfig

Initialize a new HashConfig object

#### Parameters

  • 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”.

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

[ GitHub ] 

  


# File 'activerecord/lib/active_record/database_configurations/hash_config.rb', line 38



def initialize(env_name, name, configuration_hash)
  super(env_name, name)
  @configuration_hash = configuration_hash.symbolize_keys.freeze
end


  







Instance Attribute Details



  

    #_database=(database)   (writeonly)
  

  

    This method is for internal use only.
  

  [ GitHub ]


  

  


# File 'activerecord/lib/active_record/database_configurations/hash_config.rb', line 68



def _database=(database) # :nodoc:
  @configuration_hash = configuration_hash.merge(database: database).freeze
end


  








  

    #configuration_hash   (readonly)
  

  [ GitHub ]


  

  


# File 'activerecord/lib/active_record/database_configurations/hash_config.rb', line 23



attr_reader :configuration_hash


  








  

    #database_tasks?  ⇒ Boolean  (readonly)
  

  

    This method is for internal use only.
  

  [ GitHub ]


  

  


# File 'activerecord/lib/active_record/database_configurations/hash_config.rb', line 161



def database_tasks? # :nodoc:
  !replica? && !!configuration_hash.fetch(:database_tasks, true)
end


  








  

    #primary?  ⇒ Boolean  (readonly)
  

  

    This method is for internal use only.
  

  [ GitHub ]


  

  


# File 'activerecord/lib/active_record/database_configurations/hash_config.rb', line 129



def primary? # :nodoc:
  Base.configurations.primary?(name)
end


  








  

    #replica?  ⇒ Boolean  (readonly)
  



  

    

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


  





  


  [ GitHub ]


  

  


# File 'activerecord/lib/active_record/database_configurations/hash_config.rb', line 46



def replica?
  configuration_hash[:replica]
end


  








  

    #seeds?  ⇒ Boolean  (readonly)
  



  

    

Determines whether the db:prepare task should seed the database from db/seeds.rb.



If the seeds key is present in the config, seeds? will return its value.  Otherwise, it will return true for the primary database and false for all other configs.


  





  


  [ GitHub ]


  

  


# File 'activerecord/lib/active_record/database_configurations/hash_config.rb', line 137



def seeds?
  configuration_hash.fetch(:seeds, primary?)
end


  








  

    #use_metadata_table?  ⇒ Boolean  (readonly)
  

  

    This method is for internal use only.
  

  [ GitHub ]


  

  


# File 'activerecord/lib/active_record/database_configurations/hash_config.rb', line 165



def use_metadata_table? # :nodoc:
  configuration_hash.fetch(:use_metadata_table, true)
end


  







Instance Method Details



  

    #adapter  
  

  [ GitHub ]


  

  


# File 'activerecord/lib/active_record/database_configurations/hash_config.rb', line 107



def adapter
  configuration_hash[:adapter]&.to_s
end


  








  

    #checkout_timeout  
  

  [ GitHub ]


  

  


# File 'activerecord/lib/active_record/database_configurations/hash_config.rb', line 92



def checkout_timeout
  (configuration_hash[:checkout_timeout] || 5).to_f
end


  








  

    #database  
  

  [ GitHub ]


  

  


# File 'activerecord/lib/active_record/database_configurations/hash_config.rb', line 64



def database
  configuration_hash[:database]
end


  








  

    #default_schema_cache_path(db_dir = "db")  
  

  [ GitHub ]


  

  


# File 'activerecord/lib/active_record/database_configurations/hash_config.rb', line 117



def default_schema_cache_path(db_dir = "db")
  if primary?
    File.join(db_dir, "schema_cache.yml")
  else
    File.join(db_dir, "#{name}_schema_cache.yml")
  end
end


  








  

    #host  
  

  [ GitHub ]


  

  


# File 'activerecord/lib/active_record/database_configurations/hash_config.rb', line 56



def host
  configuration_hash[:host]
end


  








  

    #idle_timeout  
  

  [ GitHub ]


  

  


# File 'activerecord/lib/active_record/database_configurations/hash_config.rb', line 102



def idle_timeout
  timeout = configuration_hash.fetch(:idle_timeout, 300).to_f
  timeout if timeout > 0
end


  








  

    #lazy_schema_cache_path  
  

  [ GitHub ]


  

  


# File 'activerecord/lib/active_record/database_configurations/hash_config.rb', line 125



def lazy_schema_cache_path
  schema_cache_path || default_schema_cache_path
end


  








  

    #max_queue  
  

  [ GitHub ]


  

  


# File 'activerecord/lib/active_record/database_configurations/hash_config.rb', line 88



def max_queue
  max_threads * 4
end


  








  

    #max_threads  
  

  [ GitHub ]


  

  


# File 'activerecord/lib/active_record/database_configurations/hash_config.rb', line 80



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.


  



  [ GitHub ]


  

  


# File 'activerecord/lib/active_record/database_configurations/hash_config.rb', line 52



def migrations_paths
  configuration_hash[:migrations_paths]
end


  








  

    #min_threads  
  

  [ GitHub ]


  

  


# File 'activerecord/lib/active_record/database_configurations/hash_config.rb', line 76



def min_threads
  (configuration_hash[:min_threads] || 0).to_i
end


  








  

    #pool  
  

  [ GitHub ]


  

  


# File 'activerecord/lib/active_record/database_configurations/hash_config.rb', line 72



def pool
  (configuration_hash[:pool] || 5).to_i
end


  








  

    #query_cache  
  

  [ GitHub ]


  

  


# File 'activerecord/lib/active_record/database_configurations/hash_config.rb', line 84



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.


  



  [ GitHub ]


  

  


# File 'activerecord/lib/active_record/database_configurations/hash_config.rb', line 98



def reaping_frequency
  configuration_hash.fetch(:reaping_frequency, 60)&.to_f
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.


  



  [ GitHub ]


  

  


# 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 :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.


  



  [ GitHub ]


  

  


# File 'activerecord/lib/active_record/database_configurations/hash_config.rb', line 149



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


  








  

    #schema_file_type(format)   (private)
  

  [ GitHub ]


  

  


# File 'activerecord/lib/active_record/database_configurations/hash_config.rb', line 170



def schema_file_type(format)
  case format
  when :ruby
    "schema.rb"
  when :sql
    "structure.sql"
  end
end


  








  

    #socket  
  

  

    This method is for internal use only.
  

  [ GitHub ]


  

  


# File 'activerecord/lib/active_record/database_configurations/hash_config.rb', line 60



def socket # :nodoc:
  configuration_hash[:socket]
end