Class: ActiveRecord::ConnectionAdapters::ReadysetAdapter

Inherits:
Object
  • Object
show all
Defined in:
lib/active_record/connection_adapters/readyset_adapter.rb

Overview

The ReadySet adapter is a proxy object that delegates all its methods to an inner PostgreSQLAdapter instance.

Constant Summary collapse

ADAPTER_NAME = 
'Readyset'.freeze

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(pg_conn) ⇒ ReadysetAdapter

Returns a new instance of ReadysetAdapter.



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# File 'lib/active_record/connection_adapters/readyset_adapter.rb', line 40

def initialize(pg_conn)
  @inner = pg_conn
end

Dynamic Method Handling

This class handles dynamic methods through the method_missing method

#method_missing ⇒ Object 



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# File 'lib/active_record/connection_adapters/readyset_adapter.rb', line 44

def method_missing(...)
  @inner.send(...)
rescue => e
  self.class.annotate_error(e)
  raise e
end

Class Method Details

.annotate_error(e) ⇒ void

This method returns an undefined value.

Finds the root cause of the given error and includes the Readyset::Error module in that error’s singleton class if the root cause was a ‘PG::Error`. This allows us to invoke `#is_a?` on the error to determine if the error came from a connection to ReadySet.

Parameters:

  • e (Exception) —

    the error whose cause should be annotated



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# File 'lib/active_record/connection_adapters/readyset_adapter.rb', line 19

def self.annotate_error(e)
  if e.cause
    annotate_error(e.cause)
  else
    if e.is_a?(::PG::Error)
      e.singleton_class.instance_eval do
        include ::Readyset::Error
      end
    end
  end

  nil
end

.method_missing ⇒ Object 



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# File 'lib/active_record/connection_adapters/readyset_adapter.rb', line 33

def self.method_missing(...)
  PostgreSQLAdapter.send(...)
rescue => e
  annotate_error(e)
  raise e
end