Class: PgHaMigrations::Extension

Inherits:
Object
  • Object
show all
Defined in:
lib/pg_ha_migrations/extension.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(name) ⇒ Extension

Returns a new instance of Extension.



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# File 'lib/pg_ha_migrations/extension.rb', line 5

def initialize(name)
  @name = name

  @schema, @version = ActiveRecord::Base.connection.select_rows(<<~SQL).first
    SELECT nspname, extversion
    FROM pg_namespace JOIN pg_extension
      ON pg_namespace.oid = pg_extension.extnamespace
    WHERE pg_extension.extname = #{ActiveRecord::Base.connection.quote(name)}
    LIMIT 1
  SQL
end

Instance Attribute Details

#name ⇒ Object (readonly)

Returns the value of attribute name.



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# File 'lib/pg_ha_migrations/extension.rb', line 3

def name
  @name
end

#schema ⇒ Object (readonly)

Returns the value of attribute schema.



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# File 'lib/pg_ha_migrations/extension.rb', line 3

def schema
  @schema
end

#version ⇒ Object (readonly)

Returns the value of attribute version.



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# File 'lib/pg_ha_migrations/extension.rb', line 3

def version
  @version
end

Instance Method Details

#installed? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/pg_ha_migrations/extension.rb', line 31

def installed?
  !!schema && !!version
end

#major_version ⇒ Object 



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# File 'lib/pg_ha_migrations/extension.rb', line 23

def major_version
  return unless version

  Gem::Version.new(version)
    .segments
    .first
end

#quoted_schema ⇒ Object 



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# File 'lib/pg_ha_migrations/extension.rb', line 17

def quoted_schema
  return unless schema

  PG::Connection.quote_ident(schema)
end