Module: ActiveRecordJsonStreamer::Controller

Defined in:
lib/active_record_json_streamer/controller.rb

Constant Summary collapse

DEFAULT_LIMIT = 
50_000

Instance Method Summary collapse

Instance Method Details

#stream_json_export(relation, filename:, batch_size: 1000, limit: DEFAULT_LIMIT, cursor_column: :created_at, primary_key: :id, order: :desc, &field_mapper) ⇒ Object 



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# File 'lib/active_record_json_streamer/controller.rb', line 7

def stream_json_export(relation, filename:, batch_size: 1000, limit: DEFAULT_LIMIT, cursor_column: :created_at, primary_key: :id, order: :desc, &field_mapper)
  response.headers["Content-Type"] = "application/json"
  response.headers["Content-Disposition"] = %(attachment; filename="#{filename}")
  response.headers["Cache-Control"] = "no-cache"
  response.headers["Last-Modified"] = Time.now.httpdate

  streamer = Streamer.new(
    relation,
    batch_size: batch_size,
    limit: limit,
    cursor_column: cursor_column,
    primary_key: primary_key,
    order: order,
    &field_mapper
  )

  self.response_body = streamer.enumerator
end