Class: Lotus::Model::Migrator::PostgresAdapter Private

Inherits:
Adapter
  • Object
show all
Defined in:
lib/lotus/model/migrator/postgres_adapter.rb

Overview

This class is part of a private API. You should avoid using this class if possible, as it may be removed or be changed in the future.

PostgreSQL adapter

Since:

  • 0.4.0

Constant Summary collapse

HOST =

This constant is part of a private API. You should avoid using this constant if possible, as it may be removed or be changed in the future.

Since:

  • 0.4.0

'PGHOST'.freeze
PORT =

This constant is part of a private API. You should avoid using this constant if possible, as it may be removed or be changed in the future.

Since:

  • 0.4.0

'PGPORT'.freeze
USER =

This constant is part of a private API. You should avoid using this constant if possible, as it may be removed or be changed in the future.

Since:

  • 0.4.0

'PGUSER'.freeze
PASSWORD =

This constant is part of a private API. You should avoid using this constant if possible, as it may be removed or be changed in the future.

Since:

  • 0.4.0

'PGPASSWORD'.freeze

Constants inherited from Adapter

Adapter::MIGRATIONS_TABLE, Adapter::MIGRATIONS_TABLE_VERSION_COLUMN

Instance Method Summary collapse

Methods inherited from Adapter

for, #initialize, #version

Constructor Details

This class inherits a constructor from Lotus::Model::Migrator::Adapter

Instance Method Details

#create ⇒ Object

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future.

Since:

  • 0.4.0



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# File 'lib/lotus/model/migrator/postgres_adapter.rb', line 27

def create
  set_environment_variables
  `createdb #{ database }`
end

#drop ⇒ Object

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future.

Since:

  • 0.4.0



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# File 'lib/lotus/model/migrator/postgres_adapter.rb', line 34

def drop
  set_environment_variables

  require 'open3'

  Open3.popen3('dropdb', database) do |stdin, stdout, stderr, wait_thr|
    exit_status = wait_thr.value

    unless exit_status.success?
      error_message = stderr.read

      message = if error_message.match(/does not exist/)
        "Cannot find database: #{ database }"
      else
        message
      end

      raise MigrationError.new(message)
    end
  end
end

#dump ⇒ Object

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future.

Since:

  • 0.4.0



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# File 'lib/lotus/model/migrator/postgres_adapter.rb', line 58

def dump
  set_environment_variables
  dump_structure
  dump_migrations_data
end

#load ⇒ Object

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future.

Since:

  • 0.4.0



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# File 'lib/lotus/model/migrator/postgres_adapter.rb', line 66

def load
  set_environment_variables
  load_structure
end