Module: ActiveRecord::Extensions::ConnectionAdapters::MysqlAdapter

Includes:
Import::ImportSupport, Import::OnDuplicateKeyUpdateSupport
Defined in:
lib/ar-extensions/import/mysql.rb

Overview

:nodoc:

Instance Method Summary collapse

Methods included from Import::OnDuplicateKeyUpdateSupport

#supports_on_duplicate_key_update?

Methods included from Import::ImportSupport

#supports_import?

Instance Method Details

#duplicate_key_update_error?(exception) ⇒ Boolean

return true if the statement is a duplicate key record error

Returns:

  • (Boolean) 


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# File 'lib/ar-extensions/import/mysql.rb', line 42

def duplicate_key_update_error?(exception)# :nodoc:
  exception.is_a?(ActiveRecord::StatementInvalid) && exception.to_s.include?('Duplicate entry')
end

#sql_for_on_duplicate_key_update(table_name, *args) ⇒ Object

Returns a generated ON DUPLICATE KEY UPDATE statement given the passed in args.



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# File 'lib/ar-extensions/import/mysql.rb', line 8

def sql_for_on_duplicate_key_update( table_name, *args ) # :nodoc:
  sql = ' ON DUPLICATE KEY UPDATE '
  arg = args.first
  if arg.is_a?( Array )
    sql << sql_for_on_duplicate_key_update_as_array( table_name, arg )
  elsif arg.is_a?( Hash )
    sql << sql_for_on_duplicate_key_update_as_hash( table_name, arg )
  elsif arg.is_a?( String )
    sql << arg
  else
    raise ArgumentError.new( "Expected Array or Hash" )
  end
  sql
end

#sql_for_on_duplicate_key_update_as_array(table_name, arr) ⇒ Object

:nodoc:



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# File 'lib/ar-extensions/import/mysql.rb', line 23

def sql_for_on_duplicate_key_update_as_array( table_name, arr )  # :nodoc:
  results = arr.map do |column|
    qc = quote_column_name( column )
    "#{table_name}.#{qc}=VALUES(#{qc})"        
  end
  results.join( ',' )
end

#sql_for_on_duplicate_key_update_as_hash(table_name, hsh) ⇒ Object

:nodoc:



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# File 'lib/ar-extensions/import/mysql.rb', line 31

def sql_for_on_duplicate_key_update_as_hash( table_name, hsh ) # :nodoc:
  sql = ' ON DUPLICATE KEY UPDATE '
  results = hsh.map do |column1, column2|
    qc1 = quote_column_name( column1 )
    qc2 = quote_column_name( column2 )
    "#{table_name}.#{qc1}=VALUES( #{qc2} )"
  end
  results.join( ',')
end