Class: ActiveRecord::Tasks::PostgreSQLDatabaseTasks

Inherits:
Object
  • Object
show all
Defined in:
lib/active_record/tasks/postgresql_database_tasks.rb

Overview

:nodoc:

Constant Summary collapse

DEFAULT_ENCODING = 
ENV["CHARSET"] || "utf8"
ON_ERROR_STOP_1 = 
"ON_ERROR_STOP=1".freeze
SQL_COMMENT_BEGIN = 
"--".freeze

Instance Method Summary collapse

Constructor Details

#initialize(configuration) ⇒ PostgreSQLDatabaseTasks

Returns a new instance of PostgreSQLDatabaseTasks.

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# File 'lib/active_record/tasks/postgresql_database_tasks.rb', line 15

def initialize(configuration)
  @configuration = configuration
end

Instance Method Details

#charset ⇒ Object

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# File 'lib/active_record/tasks/postgresql_database_tasks.rb', line 37

def charset
  connection.encoding
end

#collation ⇒ Object

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# File 'lib/active_record/tasks/postgresql_database_tasks.rb', line 41

def collation
  connection.collation
end

#create(master_established = false) ⇒ Object

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# File 'lib/active_record/tasks/postgresql_database_tasks.rb', line 19

def create(master_established = false)
  establish_master_connection unless master_established
  connection.create_database configuration["database"],
    configuration.merge("encoding" => encoding)
  establish_connection configuration
rescue ActiveRecord::StatementInvalid => error
  if error.cause.is_a?(PG::DuplicateDatabase)
    raise DatabaseAlreadyExists
  else
    raise
  end
end

#drop ⇒ Object

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# File 'lib/active_record/tasks/postgresql_database_tasks.rb', line 32

def drop
  establish_master_connection
  connection.drop_database configuration["database"]
end

#purge ⇒ Object

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# File 'lib/active_record/tasks/postgresql_database_tasks.rb', line 45

def purge
  clear_active_connections!
  drop
  create true
end

#structure_dump(filename, extra_flags) ⇒ Object

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# File 'lib/active_record/tasks/postgresql_database_tasks.rb', line 51

def structure_dump(filename, extra_flags)
  set_psql_env

  search_path = \
    case ActiveRecord::Base.dump_schemas
    when :schema_search_path
      configuration["schema_search_path"]
    when :all
      nil
    when String
      ActiveRecord::Base.dump_schemas
    end

  args = ["-s", "-x", "-O", "-f", filename]
  args.concat(Array(extra_flags)) if extra_flags
  unless search_path.blank?
    args += search_path.split(",").map do |part|
      "--schema=#{part.strip}"
    end
  end

  ignore_tables = ActiveRecord::SchemaDumper.ignore_tables
  if ignore_tables.any?
    args += ignore_tables.flat_map { |table| ["-T", table] }
  end

  args << configuration["database"]
  run_cmd("pg_dump", args, "dumping")
  remove_sql_header_comments(filename)
  File.open(filename, "a") { |f| f << "SET search_path TO #{connection.schema_search_path};\n\n" }
end

#structure_load(filename, extra_flags) ⇒ Object

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# File 'lib/active_record/tasks/postgresql_database_tasks.rb', line 83

def structure_load(filename, extra_flags)
  set_psql_env
  args = ["-v", ON_ERROR_STOP_1, "-q", "-f", filename]
  args.concat(Array(extra_flags)) if extra_flags
  args << configuration["database"]
  run_cmd("psql", args, "loading")
end