Class: BEL::Resource::Search::Plugins::Sqlite::Sqlite3FTS

Inherits:
Object
  • Object
show all
Includes:
BEL::Resource::Search, API
Defined in:
lib/bel/resource/search/plugins/sqlite/sqlite3.rb

Constant Summary collapse

QUERY_TEMPLATE = 
ERB.new(
  File.read(Pathname(File.dirname(__FILE__)) + 'sqlite3_template.erb'),
  nil,
  '>'
)
PREPARED_STATEMENTS = 
{}

Instance Method Summary collapse

Constructor Details

#initialize(db) ⇒ Sqlite3FTS

Returns a new instance of Sqlite3FTS.



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# File 'lib/bel/resource/search/plugins/sqlite/sqlite3.rb', line 20

def initialize(db)
  @db = db
end

Instance Method Details

#search(query_expression, concept_type = nil, scheme_uri = nil, species = nil, options = {}) ⇒ Object

See Also:

  • API#search


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# File 'lib/bel/resource/search/plugins/sqlite/sqlite3.rb', line 25

def search(query_expression, concept_type = nil, scheme_uri = nil, species = nil, options = {})
  # required SQL parameters
  size  = options.delete(:size) || -1
  if size.to_i.zero?
    fail ArgumentError.new(":size is zero")
  end

  # optional SQL parameters
  params = {
    :match        => query_expression.encode('UTF-8'),
    :start        => (options.delete(:start) || 0).to_i,
    :size         => size,
    :concept_type => (concept_type ? concept_type.to_s.encode('UTF-8') : nil),
    :scheme_uri   => (scheme_uri ? scheme_uri.to_s.encode('UTF-8') : nil),
    :species      => (species ? species.to_s.encode('UTF-8') : nil),
  }

  query   = QUERY_TEMPLATE.result(binding)
  enum    = @db.fetch(query, params)

  if enum.respond_to? :lazy
    enum = enum.lazy
  end

  enum.map { |row|
    row_hash = row.to_hash
    row_hash[:alt_labels] = (row_hash[:alt_labels] || '').split('|')
    SearchResult.new(row_hash)
  }
end