class ActiveRecord::FixtureSet::TableRows

def build_table_rows_from(table_name, fixtures)
  now = ActiveRecord.default_timezone == :utc ? Time.now.utc : Time.now
  @tables[table_name] = fixtures.map do |label, fixture|
    TableRow.new(
      fixture,
      table_rows: self,
      label: label,
      now: now,
    )
  end
end

def initialize(table_name, model_class:, fixtures:)
  @model_class = model_class
  # track any join tables we need to insert later
  @tables = Hash.new { |h, table| h[table] = [] }
  # ensure this table is loaded before any HABTM associations
  @tables[table_name] = nil
  build_table_rows_from(table_name, fixtures)
end

def model_metadata
  @model_metadata ||= ModelMetadata.new(model_class)
end

def to_hash
  @tables.transform_values { |rows| rows.map(&:to_hash) }
end