class SerializationHelper::Load

Public Class Methods

load(io, truncate = true) click to toggle source
# File lib/serialization_helper.rb, line 62
def self.load(io, truncate = true)
  ActiveRecord::Base.connection.transaction do
    load_documents(io, truncate)
  end
end
load_records(table, column_names, records) click to toggle source
# File lib/serialization_helper.rb, line 87
def self.load_records(table, column_names, records)
  if column_names.nil?
    return
  end
  columns = column_names.map{|cn| ActiveRecord::Base.connection.columns(table).detect{|c| c.name == cn}}
  quoted_column_names = column_names.map { |column| ActiveRecord::Base.connection.quote_column_name(column) }.join(',')
  quoted_table_name = SerializationHelper::Utils.quote_table(table)
  records.each do |record|
    quoted_values = record.zip(columns).map{|c| ActiveRecord::Base.connection.quote(c.first, c.last)}.join(',')
    ActiveRecord::Base.connection.execute("INSERT INTO #{quoted_table_name} (#{quoted_column_names}) VALUES (#{quoted_values})")
  end
end
load_table(table, data, truncate = true) click to toggle source
# File lib/serialization_helper.rb, line 78
def self.load_table(table, data, truncate = true)
  column_names = data['columns']
  if truncate
    truncate_table(table)
  end
  load_records(table, column_names, data['records'])
  reset_pk_sequence!(table)
end
reset_pk_sequence!(table_name) click to toggle source
# File lib/serialization_helper.rb, line 100
def self.reset_pk_sequence!(table_name)
  if ActiveRecord::Base.connection.respond_to?(:reset_pk_sequence!)
    ActiveRecord::Base.connection.reset_pk_sequence!(table_name)
  end
end
truncate_table(table) click to toggle source
# File lib/serialization_helper.rb, line 68
def self.truncate_table(table)
  begin
    ActiveRecord::Base.connection.execute("SAVEPOINT before_truncation")
    ActiveRecord::Base.connection.execute("TRUNCATE #{SerializationHelper::Utils.quote_table(table)} CASCADE")
  rescue Exception
    ActiveRecord::Base.connection.execute("ROLLBACK TO SAVEPOINT before_truncation")
    ActiveRecord::Base.connection.execute("DELETE FROM #{SerializationHelper::Utils.quote_table(table)}")
  end
end