Class: Couchbase::Scope

Inherits:
Object
  • Object
show all
Defined in:
lib/couchbase/scope.rb,
/Users/sergey.auseyau/code/couchbase-ruby-client/lib/couchbase/scope.rb more...

Overview

The scope identifies a group of collections and allows high application density as a result.

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(backend, bucket_name, scope_name) ⇒ Scope

Returns a new instance of Scope.

Parameters:

  • backend (Couchbase::Backend)
  • bucket_name (String) —

    name of the bucket

  • scope_name (String, :_default) —

    name of the scope

[View source]

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# File 'lib/couchbase/scope.rb', line 30

def initialize(backend, bucket_name, scope_name)
  @backend = backend
  @bucket_name = bucket_name
  @name = scope_name
end

Instance Attribute Details

#bucket_name ⇒ Object (readonly)

Returns the value of attribute bucket_name.


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# File 'lib/couchbase/scope.rb', line 22

def bucket_name
  @bucket_name
end

#name ⇒ Object (readonly)

Returns the value of attribute name.


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# File 'lib/couchbase/scope.rb', line 23

def name
  @name
end

Instance Method Details

#analytics_query(statement, options = Options::Analytics.new) ⇒ AnalyticsResult

Performs an analytics query

The query will be implicitly scoped using current bucket and scope names.

Examples:

Select name of the given user

scope.analytics_query("SELECT u.name AS uname FROM GleambookUsers u WHERE u.id = $user_id ",
                       Options::Analytics(named_parameters: {user_id: 2}))

Parameters:

  • statement (String) —

    the N1QL query statement

  • options (Options::Analytics) (defaults to: Options::Analytics.new) —

    the custom options for this query

Returns:

  • (AnalyticsResult)
[View source]

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# File 'lib/couchbase/scope.rb', line 100

def analytics_query(statement, options = Options::Analytics.new)
  resp = @backend.document_analytics(statement, options.to_backend(scope_name: @name, bucket_name: @bucket_name))

  Cluster::AnalyticsResult.new do |res|
    res.transcoder = options.transcoder
    res.meta_data = Cluster::AnalyticsMetaData.new do |meta|
      meta.status = resp[:meta][:status]
      meta.request_id = resp[:meta][:request_id]
      meta.client_context_id = resp[:meta][:client_context_id]
      meta.signature = JSON.parse(resp[:meta][:signature]) if resp[:meta][:signature]
      meta.profile = JSON.parse(resp[:meta][:profile]) if resp[:meta][:profile]
      meta.metrics = Cluster::AnalyticsMetrics.new do |metrics|
        if resp[:meta][:metrics]
          metrics.elapsed_time = resp[:meta][:metrics][:elapsed_time]
          metrics.execution_time = resp[:meta][:metrics][:execution_time]
          metrics.result_count = resp[:meta][:metrics][:result_count]
          metrics.result_size = resp[:meta][:metrics][:result_size]
          metrics.error_count = resp[:meta][:metrics][:error_count]
          metrics.warning_count = resp[:meta][:metrics][:warning_count]
          metrics.processed_objects = resp[:meta][:metrics][:processed_objects]
        end
      end
      res[:warnings] = resp[:warnings].map { |warn| Cluster::AnalyticsWarning.new(warn[:code], warn[:message]) } if resp[:warnings]
    end
    res.instance_variable_set("@rows", resp[:rows])
  end
end

#collection(collection_name) ⇒ Collection

Opens the default collection for this scope

Parameters:

  • collection_name (String) —

    name of the collection

Returns:

[View source]

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# File 'lib/couchbase/scope.rb', line 41

def collection(collection_name)
  Collection.new(@backend, @bucket_name, @name, collection_name)
end

#query(statement, options = Options::Query.new) ⇒ QueryResult

Performs a query against the query (N1QL) services.

The query will be implicitly scoped using current bucket and scope names.

Examples:

Select first ten hotels from travel sample dataset

scope.query("SELECT * FROM `travel-sample` WHERE type = $type LIMIT 10",
             Options::Query(named_parameters: {type: "hotel"}, metrics: true))

Parameters:

  • statement (String) —

    the N1QL query statement

  • options (Options::Query) (defaults to: Options::Query.new) —

    the custom options for this query

Returns:

  • (QueryResult)

See Also:

[View source]

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# File 'lib/couchbase/scope.rb', line 60

def query(statement, options = Options::Query.new)
  resp = @backend.document_query(statement, options.to_backend(scope_name: @name, bucket_name: @bucket_name))

  Cluster::QueryResult.new do |res|
    res.meta_data = Cluster::QueryMetaData.new do |meta|
      meta.status = resp[:meta][:status]
      meta.request_id = resp[:meta][:request_id]
      meta.client_context_id = resp[:meta][:client_context_id]
      meta.signature = JSON.parse(resp[:meta][:signature]) if resp[:meta][:signature]
      meta.profile = JSON.parse(resp[:meta][:profile]) if resp[:meta][:profile]
      meta.metrics = Cluster::QueryMetrics.new do |metrics|
        if resp[:meta][:metrics]
          metrics.elapsed_time = resp[:meta][:metrics][:elapsed_time]
          metrics.execution_time = resp[:meta][:metrics][:execution_time]
          metrics.sort_count = resp[:meta][:metrics][:sort_count]
          metrics.result_count = resp[:meta][:metrics][:result_count]
          metrics.result_size = resp[:meta][:metrics][:result_size]
          metrics.mutation_count = resp[:meta][:metrics][:mutation_count]
          metrics.error_count = resp[:meta][:metrics][:error_count]
          metrics.warning_count = resp[:meta][:metrics][:warning_count]
        end
      end
      res[:warnings] = resp[:warnings].map { |warn| Cluster::QueryWarning.new(warn[:code], warn[:message]) } if resp[:warnings]
    end
    res.instance_variable_set("@rows", resp[:rows])
  end
end

#search_query(index_name, query, options = Options::Search.new) ⇒ SearchResult

Performs a Full Text Search (FTS) query

Examples:

Return first 10 results of “hop beer” query and request highlighting

cluster.search_query("travel_index", Cluster::SearchQuery.match_phrase("green"),
                     Options::Search(
                       limit: 10,
                       collections: ["landmark", "hotel"]
                       fields: %w[name],
                       highlight_style: :html,
                       highlight_fields: %w[name description]
                     ))

Parameters:

  • index_name (String) —

    the name of the search index

  • query (SearchQuery) —

    the query tree

  • options (Options::Search) (defaults to: Options::Search.new) —

    the query tree

Returns:

  • (SearchResult)
[View source]

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# File 'lib/couchbase/scope.rb', line 145

def search_query(index_name, query, options = Options::Search.new)
  resp = @backend.document_search(index_name, JSON.generate(query), options.to_backend(scope_name: @name))

  SearchResult.new do |res|
    res.meta_data = SearchMetaData.new do |meta|
      meta.metrics.max_score = resp[:meta_data][:metrics][:max_score]
      meta.metrics.error_partition_count = resp[:meta_data][:metrics][:error_partition_count]
      meta.metrics.success_partition_count = resp[:meta_data][:metrics][:success_partition_count]
      meta.metrics.took = resp[:meta_data][:metrics][:took]
      meta.metrics.total_rows = resp[:meta_data][:metrics][:total_rows]
      meta.errors = resp[:meta_data][:errors]
    end
    res.rows = resp[:rows].map do |r|
      SearchRow.new do |row|
        row.transcoder = options.transcoder
        row.index = r[:index]
        row.id = r[:id]
        row.score = r[:score]
        row.fragments = r[:fragments]
        row.locations = SearchRowLocations.new(
          r[:locations].map do |loc|
            SearchRowLocation.new do |location|
              location.field = loc[:field]
              location.term = loc[:term]
              location.position = loc[:position]
              location.start_offset = loc[:start_offset]
              location.end_offset = loc[:end_offset]
              location.array_positions = loc[:array_positions]
            end
          end
        )
        row.instance_variable_set("@fields", r[:fields])
        row.explanation = JSON.parse(r[:explanation]) if r[:explanation]
      end
    end
    if resp[:facets]
      res.facets = resp[:facets].each_with_object({}) do |(k, v), o|
        facet = case options.facets[k]
                when SearchFacet::SearchFacetTerm
                  SearchFacetResult::TermFacetResult.new do |f|
                    f.terms =
                      if v[:terms]
                        v[:terms].map do |t|
                          SearchFacetResult::TermFacetResult::TermFacet.new(t[:term], t[:count])
                        end
                      else
                        []
                      end
                  end
                when SearchFacet::SearchFacetDateRange
                  SearchFacetResult::DateRangeFacetResult.new do |f|
                    f.date_ranges =
                      if v[:date_ranges]
                        v[:date_ranges].map do |r|
                          SearchFacetResult::DateRangeFacetResult::DateRangeFacet.new(r[:name], r[:count], r[:start_time], r[:end_time])
                        end
                      else
                        []
                      end
                  end
                when SearchFacet::SearchFacetNumericRange
                  SearchFacetResult::NumericRangeFacetResult.new do |f|
                    f.numeric_ranges =
                      if v[:numeric_ranges]
                        v[:numeric_ranges].map do |r|
                          SearchFacetResult::NumericRangeFacetResult::NumericRangeFacet.new(r[:name], r[:count], r[:min], r[:max])
                        end
                      else
                        []
                      end
                  end
                else
                  next # ignore unknown facet result
                end
        facet.name = v[:name]
        facet.field = v[:field]
        facet.total = v[:total]
        facet.missing = v[:missing]
        facet.other = v[:other]
        o[k] = facet
      end
    end
  end
end