Class: Queries::Source::Autocomplete

Inherits:
Query
  • Object
show all
Defined in:
lib/queries/source/autocomplete.rb

Instance Attribute Summary collapse

Attributes inherited from Query

#dynamic_limit, #options, #query_string, #terms

Instance Method Summary collapse

Methods inherited from Query

#alphabetic_strings, #attribute_exact_facet, #autocomplete_cached, #autocomplete_cached_wildcard_anywhere, #autocomplete_common_name_exact, #autocomplete_common_name_like, #autocomplete_exact_id, #autocomplete_exactly_named, #autocomplete_named, #autocomplete_ordered_wildcard_pieces_in_cached, #build_terms, #cached, #combine_or_clauses, #common_name_name, #common_name_table, #common_name_wild_pieces, #end_wildcard, #exactly_named, #fragments, #integers, #levenshtein_distance, #match_ordered_wildcard_pieces_in_cached, #match_wildcard_end_in_cached, #match_wildcard_in_cached, #named, #no_terms?, #only_ids, #only_integers?, #parent, #parent_child_join, #parent_child_where, #pieces, #result, #scope, #start_and_end_wildcard, #start_wildcard, #wildcard_pieces, #wildcard_wrapped_integers, #wildcard_wrapped_years, #with_cached, #with_cached_like, #with_id, #with_project_id, #year_letter, #years

Constructor Details

#initialize(string, project_id: nil, limit_to_project: false) ⇒ Autocomplete

Returns a new instance of Autocomplete.

Parameters:

  • args (Hash) 


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# File 'lib/queries/source/autocomplete.rb', line 14

def initialize(string, project_id: nil, limit_to_project: false)
  @limit_to_project = limit_to_project
  super
end

Instance Attribute Details

#limit_to_project ⇒ Boolean

Either match against all Sources (default) or just those with ProjectSource

Parameters:

  • limit_to_project (String) —

    `true` or `false`

Returns:

  • (Boolean) 


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# File 'lib/queries/source/autocomplete.rb', line 8

def limit_to_project
  @limit_to_project
end

#project_id ⇒ Object

Comes from sessions_current_project_id in UI



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# File 'lib/queries/source/autocomplete.rb', line 11

def project_id
  @project_id
end

Instance Method Details

#author_from_author_year ⇒ String

Returns:

  • (String) 


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# File 'lib/queries/source/autocomplete.rb', line 157

def author_from_author_year
  query_string.match(/^(.+?)\W/).to_a.last
end

#autocomplete ⇒ Array

Returns:

  • (Array) 


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# File 'lib/queries/source/autocomplete.rb', line 179

def autocomplete

  # [ query, order by use if true- don't if nil ]
  queries = [
    [ autocomplete_exact_id, nil],
    [ autocomplete_identifier_identifier_exact, nil],
    [ autocomplete_exact_author_year_letter&.limit(2), nil],
    [ autocomplete_exact_author_year&.limit(10), nil],
    [ autocomplete_identifier_cached_exact, nil],
    [ autocomplete_wildcard_author_exact_year&.limit(10), true],
    [ autocomplete_exact_author&.limit(20), true],
    [ autocomplete_start_of_author.limit(8), true],
    [ autocomplete_wildcard_anywhere_exact_year&.limit(10), true],
    [ autocomplete_identifier_cached_like, true],
    [ autocomplete_ordered_wildcard_pieces_in_cached&.limit(5), true],
    [ autocomplete_cached_wildcard_anywhere&.limit(20), true],
    [ autocomplete_start_of_title&.limit(5), true],
    [ autocomplete_wildcard_of_title_alternate&.limit(5), true]
  ]

  queries.delete_if{|a,b| a.nil?} # compact!

  result = []

  queries.each do |q, scope|
    a = q

    # Limit autocomplete to ONLY project sources if limit_to_project == true
    if project_id && limit_to_project
      a = a.joins(:project_sources).where(member_of_project_id.to_sql)
    end

    # Order results by number of times used *in this project*
    if project_id && scope
      a = a.left_outer_joins(:citations)
        .select('sources.*, COUNT(citations.id) AS use_count, NULLIF(citations.project_id, NULL) as in_project')
        .where('citations.project_id = ? OR citations.project_id IS NULL', project_id)
        .group('sources.id, citations.project_id')
        .order('use_count DESC')
    end
    a ||= q

    result += a.to_a
    result.uniq!
    break if result.count > 19
  end

  result[0..19]
end

#autocomplete_any_author ⇒ ActiveRecord::Relation

Returns author matches any full word exactly

!!  Not used currently.

Returns:

  • (ActiveRecord::Relation) —

    author matches any full word exactly

    !!  Not used currently



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# File 'lib/queries/source/autocomplete.rb', line 34

def autocomplete_any_author
  a = table[:cached_author_string].matches_regexp('\m' + query_string + '\M')
  base_query.where(a.to_sql).limit(20)
end

#autocomplete_exact_author ⇒ ActiveRecord::Relation

Returns if and only iff author string matches.

Returns:

  • (ActiveRecord::Relation) —

    if and only iff author string matches



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# File 'lib/queries/source/autocomplete.rb', line 26

def autocomplete_exact_author
  a = table[:cached_author_string].eq(query_string)
  base_query.where(a.to_sql)
end

#autocomplete_exact_author_year ⇒ ActiveRecord::Relation?

Returns:

  • (ActiveRecord::Relation, nil) 


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# File 'lib/queries/source/autocomplete.rb', line 105

def autocomplete_exact_author_year
  a = match_exact_author
  b = match_year
  return nil if a.nil? || b.nil?
  c = a.and(b)
  base_query.where(c.to_sql)
end

#autocomplete_exact_author_year_letter ⇒ ActiveRecord::Relation?

Returns:

  • (ActiveRecord::Relation, nil) 


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# File 'lib/queries/source/autocomplete.rb', line 95

def autocomplete_exact_author_year_letter
  a = match_exact_author
  b = match_year_suffix
  c = match_year
  return nil if [a,b,c].include?(nil)
  d = a.and(b).and(c)
  base_query.where(d.to_sql)
end

#autocomplete_partial_author ⇒ ActiveRecord::Relation

Returns author matches partial string

!! Not used currently.

Returns:

  • (ActiveRecord::Relation) —

    author matches partial string

    !! Not used currently



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# File 'lib/queries/source/autocomplete.rb', line 49

def autocomplete_partial_author
  a = table[:cached_author_string].matches('%' + query_string + '%')
  base_query.where(a.to_sql).limit(5)
end

#autocomplete_start_of_author ⇒ ActiveRecord::Relation

Returns author matches start.

Returns:

  • (ActiveRecord::Relation) —

    author matches start



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# File 'lib/queries/source/autocomplete.rb', line 41

def autocomplete_start_of_author
  a = table[:cached_author_string].matches(query_string + '%')
  base_query.where(a.to_sql)
end

#autocomplete_start_of_title ⇒ ActiveRecord::Relation

Returns title matches start.

Returns:

  • (ActiveRecord::Relation) —

    title matches start



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# File 'lib/queries/source/autocomplete.rb', line 63

def autocomplete_start_of_title
  a = table[:title].matches(query_string + '%')
  base_query.where(a.to_sql)
end

#autocomplete_wildcard_anywhere_exact_year ⇒ ActiveRecord::Relation?

Returns:

  • (ActiveRecord::Relation, nil) 


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# File 'lib/queries/source/autocomplete.rb', line 123

def autocomplete_wildcard_anywhere_exact_year
  a = match_year
  b = match_wildcard_in_cached
  return nil if a.nil? || b.nil?
  c = a.and(b)
  base_query.where(c.to_sql)
end

#autocomplete_wildcard_author_exact_year ⇒ ActiveRecord::Relation?

Returns:

  • (ActiveRecord::Relation, nil) 


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# File 'lib/queries/source/autocomplete.rb', line 114

def autocomplete_wildcard_author_exact_year
  a = match_year
  b = match_wildcard_author
  return nil if a.nil? || b.nil?
  c = a.and(b)
  base_query.where(c.to_sql)
end

#autocomplete_wildcard_of_title_alternate ⇒ ActiveRecord::Relation

Returns title matches wildcard on alternate.

Returns:

  • (ActiveRecord::Relation) —

    title matches wildcard on alternate



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# File 'lib/queries/source/autocomplete.rb', line 70

def autocomplete_wildcard_of_title_alternate
  base_query.joins(:alternate_values).
    where("alternate_values.alternate_value_object_attribute = 'title' AND alternate_values.value ILIKE ?", '%' + query_string + '%')
end

#autocomplete_wildcard_pieces_and_year ⇒ ActiveRecord::Relation

Returns author matches partial string.

Returns:

  • (ActiveRecord::Relation) —

    author matches partial string



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# File 'lib/queries/source/autocomplete.rb', line 77

def autocomplete_wildcard_pieces_and_year
  a = match_ordered_wildcard_pieces_in_cached
  b = match_year
  return nil if a.nil? || b.nil?
  c = a.and(b)
  base_query.where(c.to_sql).limit(5)
end

#autocomplete_year ⇒ ActiveRecord::Relation

Returns multi-year match? otherwise pointless.

Returns:

  • (ActiveRecord::Relation) —

    multi-year match? otherwise pointless



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# File 'lib/queries/source/autocomplete.rb', line 56

def autocomplete_year
  a = table[:year].eq_any(years)
  base_query.where(a.to_sql).limit(5)
end

#autocomplete_year_letter ⇒ ActiveRecord::Relation?

Returns:

  • (ActiveRecord::Relation, nil) 


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# File 'lib/queries/source/autocomplete.rb', line 86

def autocomplete_year_letter
  a = match_year
  b = match_year_suffix
  return nil if a.nil? || b.nil?
  c = a.and(b)
  base_query.where(c.to_sql).limit(10)
end

#base_query ⇒ Scope

Returns:

  • (Scope) 


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# File 'lib/queries/source/autocomplete.rb', line 20

def base_query
  ::Source #.select('sources.*')
end

#fragment_year_matches ⇒ ActiveRecord::Relation?

Returns if user provides 5 or fewer strings and any number of years look for any string && year.

Returns:

  • (ActiveRecord::Relation, nil) —

    if user provides 5 or fewer strings and any number of years look for any string && year



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# File 'lib/queries/source/autocomplete.rb', line 168

def fragment_year_matches
  if fragments.any?
    s = table[:cached].matches_any(fragments)
    s = s.and(table[:year].eq_any(years)) if !years.empty?
    s
  else
    nil
  end
end

#match_exact_author ⇒ Arel::Nodes::Equatity

Returns:

  • (Arel::Nodes::Equatity) 


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# File 'lib/queries/source/autocomplete.rb', line 140

def match_exact_author
  table[:cached_author_string].eq(author_from_author_year)
end

#match_wildcard_author ⇒ Arel::Nodes::Matches

match ALL wildcards, but unordered, if 2 - 6 pieces provided

Returns:

  • (Arel::Nodes::Matches) 


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# File 'lib/queries/source/autocomplete.rb', line 133

def match_wildcard_author
  b = fragments
  return nil if b.empty?
  a = table[:cached_author_string].matches_all(b)
end

#match_year ⇒ Arel::Nodes::Equatity

Returns:

  • (Arel::Nodes::Equatity) 


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# File 'lib/queries/source/autocomplete.rb', line 150

def match_year
  a = years.first
  return nil if a.nil?
  table[:year].eq(a)
end

#match_year_suffix ⇒ Arel::Nodes::Equatity

Returns:

  • (Arel::Nodes::Equatity) 


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# File 'lib/queries/source/autocomplete.rb', line 145

def match_year_suffix
  table[:year_suffix].eq(year_letter)
end

#member_of_project_id ⇒ Arel::Nodes::Equatity

Returns:

  • (Arel::Nodes::Equatity) 


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# File 'lib/queries/source/autocomplete.rb', line 162

def member_of_project_id
  project_sources_table[:project_id].eq(project_id)
end

#project_sources_table ⇒ Arel::Table

Returns:

  • (Arel::Table) 


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# File 'lib/queries/source/autocomplete.rb', line 235

def project_sources_table
  ::ProjectSource.arel_table
end

#table ⇒ Arel::Table

Returns:

  • (Arel::Table) 


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# File 'lib/queries/source/autocomplete.rb', line 230

def table
  ::Source.arel_table
end