elasticsearch-api/lib/elasticsearch/api/actions/transform/preview_transform.rb

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#   http://www.apache.org/licenses/LICENSE-2.0
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# under the License.
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# This code was automatically generated from the Elasticsearch Specification
# See https://github.com/elastic/elasticsearch-specification
# See Elasticsearch::ES_SPECIFICATION_COMMIT for commit hash.
module Elasticsearch
  module API
    module Transform
      module Actions
        # Preview a transform.
        # Generates a preview of the results that you will get when you create a transform with the same configuration.
        # It returns a maximum of 100 results. The calculations are based on all the current data in the source index. It also
        # generates a list of mappings and settings for the destination index. These values are determined based on the field
        # types of the source index and the transform aggregations.
        #
        # @option arguments [String] :transform_id Identifier for the transform to preview. If you specify this path parameter, you cannot provide transform
        #  configuration details in the request body.
        # @option arguments [Time] :timeout Period to wait for a response. If no response is received before the
        #  timeout expires, the request fails and returns an error. Server default: 30s.
        # @option arguments [Boolean] :error_trace When set to `true` Elasticsearch will include the full stack trace of errors
        #  when they occur.
        # @option arguments [String] :filter_path Comma-separated list of filters in dot notation which reduce the response
        #  returned by Elasticsearch.
        # @option arguments [Boolean] :human When set to `true` will return statistics in a format suitable for humans.
        #  For example `"exists_time": "1h"` for humans and
        #  `"eixsts_time_in_millis": 3600000` for computers. When disabled the human
        #  readable values will be omitted. This makes sense for responses being consumed
        #  only by machines.
        # @option arguments [Boolean] :pretty If set to `true` the returned JSON will be "pretty-formatted". Only use
        #  this option for debugging only.
        # @option arguments [Hash] :headers Custom HTTP headers
        # @option arguments [Hash] :body request body
        #
        # @see https://www.elastic.co/docs/api/doc/elasticsearch/operation/operation-transform-preview-transform
        #
        def preview_transform(arguments = {})
          request_opts = { endpoint: arguments[:endpoint] || 'transform.preview_transform' }

          defined_params = [:transform_id].each_with_object({}) do |variable, set_variables|
            set_variables[variable] = arguments[variable] if arguments.key?(variable)
          end
          request_opts[:defined_params] = defined_params unless defined_params.empty?

          arguments = arguments.clone
          headers = arguments.delete(:headers) || {}

          body = arguments.delete(:body)

          _transform_id = arguments.delete(:transform_id)

          method = if body
                     Elasticsearch::API::HTTP_POST
                   else
                     Elasticsearch::API::HTTP_GET
                   end

          path   = if _transform_id
                     "_transform/#{Utils.listify(_transform_id)}/_preview"
                   else
                     '_transform/_preview'
                   end
          params = Utils.process_params(arguments)

          Elasticsearch::API::Response.new(
            perform_request(method, path, params, body, headers, request_opts)
          )
        end
      end
    end
  end
end