Class: Factbase::IndexedQuery

Inherits:
Object
  • Object
show all
Includes:
Enumerable
Defined in:
lib/factbase/indexed/indexed_query.rb

Overview

Query with an index, a decorator of another query.

Author

Yegor Bugayenko (yegor256@gmail.com)

Copyright

Copyright © 2024-2026 Yegor Bugayenko

License

MIT

Instance Method Summary collapse

Constructor Details

#initialize(origin, idx, fb, fresh) ⇒ IndexedQuery

Constructor.

Parameters:

  • origin (Factbase::Query) —

    Original query

  • idx (Hash) —

    The index

  • fresh (Set) —

    The set of IDs of newly inserted facts



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# File 'lib/factbase/indexed/indexed_query.rb', line 21

def initialize(origin, idx, fb, fresh)
  @origin = origin
  @idx = idx
  @fb = fb
  @fresh = fresh
end

Instance Method Details

#delete!(fb = @fb) ⇒ Integer

Delete all facts that match the query.

Parameters:

  • fb (Factbase) (defaults to: @fb) —

    The factbase

Returns:

  • (Integer) —

    Total number of facts deleted



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# File 'lib/factbase/indexed/indexed_query.rb', line 59

def delete!(fb = @fb)
  @origin.delete!(fb).tap { @idx.clear }
end

#each(fb = @fb, params = {}) {|Fact| ... } ⇒ Integer

Iterate facts one by one.

Parameters:

  • params (Hash) (defaults to: {}) —

    Optional params accessible in the query via the “$” symbol

Yields:

  • (Fact) —

    Facts one-by-one

Returns:

  • (Integer) —

    Total number of facts yielded



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# File 'lib/factbase/indexed/indexed_query.rb', line 38

def each(fb = @fb, params = {})
  return to_enum(__method__, fb, params) unless block_given?
  n = 0
  @origin.each(fb, params) do |f|
    yield(Factbase::IndexedFact.new(f, @idx, @fresh))
    n += 1
  end
  n
end

#one(fb = @fb, params = {}) ⇒ String|Integer|Float|Time|Array|NilClass

Read a single value.

Parameters:

  • fb (Factbase) (defaults to: @fb) —

    The factbase

  • params (Hash) (defaults to: {}) —

    Optional params accessible in the query via the “$” symbol

Returns:

  • (String|Integer|Float|Time|Array|NilClass) —

    The value evaluated



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# File 'lib/factbase/indexed/indexed_query.rb', line 52

def one(fb = @fb, params = {})
  @origin.one(fb, params)
end

#to_s ⇒ String

Print it as a string.

Returns:

  • (String) —

    The query as a string



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# File 'lib/factbase/indexed/indexed_query.rb', line 30

def to_s
  @origin.to_s
end