Class: Marty::DataGrid

Inherits:
Base show all
Defined in:
app/models/marty/data_grid.rb,
app/services/marty/data_grid/constraint.rb

Defined Under Namespace

Classes: Constraint, DataGridValidator

Constant Summary collapse

DEFAULT_DATA_TYPE =

If data_type is nil, assume float

'float'
INDEX_MAP = 
{
  'numrange'  => Marty::GridIndexNumrange,
  'int4range' => Marty::GridIndexInt4range,
  'integer'   => Marty::GridIndexInteger,
  'string'    => Marty::GridIndexString,
  'boolean'   => Marty::GridIndexBoolean,
}.freeze
ARRSEP = 
'|'.freeze
NOT_STRING_START = 
'NOT ('.freeze
NOT_STRING_END = 
')'.freeze
NULL_STRING = 
'NULL'.freeze
PLV_DT_FMT = 
'%Y-%m-%d %H:%M:%S.%N6'

Class Method Summary collapse

Instance Method Summary collapse

Methods inherited from Base

get_final_attrs, make_hash, make_openstruct, mcfly_pt

Methods inherited from ActiveRecord::Base

joins, old_joins

Class Method Details

.clear_dtcache ⇒ Object 



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# File 'app/models/marty/data_grid.rb', line 182

def self.clear_dtcache
  @@dtcache = {}
end

.convert_data_type(data_type) ⇒ Object 



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# File 'app/models/marty/data_grid.rb', line 171

def self.convert_data_type(data_type)
  # given data_type, convert it to class and or known data type --
  # returns nil if data_type is invalid

  return DEFAULT_DATA_TYPE if data_type.nil?
  return data_type if
    Marty::DataConversion::DATABASE_TYPES.member?(data_type.to_sym)

  data_type.constantize rescue nil
end

.create_from_import(name, import_text, created_dt = nil) ⇒ Object 



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# File 'app/models/marty/data_grid.rb', line 819

def self.create_from_import(name, import_text, created_dt = nil)
  parsed_result = parse(created_dt, import_text, {})

  metadata = parsed_result[:metadata]
  data = parsed_result[:data]
  data_type = parsed_result[:data_type]
  lenient = parsed_result[:lenient]
  constraint = parsed_result[:constraint]
  strict_null_mode = parsed_result[:strict_null_mode]

  dg                  = new
  dg.name             = name
  dg.data             = data
  dg.data_type        = data_type
  dg.lenient          = lenient
  dg.strict_null_mode = strict_null_mode
  dg.metadata         = metadata
  dg.created_dt       = created_dt if created_dt
  dg.constraint       = constraint
  dg.save!
  dg
end

.export_keys(inf) ⇒ Object 



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# File 'app/models/marty/data_grid.rb', line 484

def self.export_keys(inf)
  # should unify this with Marty::DataConversion.convert

  type = inf['type']
  nots = inf.fetch('nots', [])
  wildcards = inf.fetch('wildcards', [])
  klass = type.constantize unless INDEX_MAP[type]

  keys = inf['keys'].each_with_index.map do |v, index|
    wildcard = wildcards.fetch(index, true)

    next 'NULL' if v.nil? && !wildcard

    case type
    when 'numrange', 'int4range'
      Marty::Util.pg_range_to_human(v)
    when 'boolean'
      v.to_s
    when 'string', 'integer'
      v.map do |val|
        next 'NULL' if val.nil? && !wildcard

        val.to_s
      end.join(ARRSEP) if v
    else
      # assume it's an AR class
      v.each do |k|
        begin
          # check to see if class instance actually exists
          Marty::DataGrid.
            find_class_instance('infinity', klass, k) || raise(NoMethodError)
        rescue NoMethodError
          raise "instance #{k} of #{type} not found"
        end
      end if v
      v.join(ARRSEP) if v
    end
  end

  keys.each_with_index.map do |v, index|
    next v unless nots[index]

    add_not(v)
  end
end

.get_struct_attrs ⇒ Object 



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# File 'app/models/marty/data_grid.rb', line 119

def self.get_struct_attrs
  self.struct_attrs ||= super + ['id', 'group_id', 'created_dt', 'name']
end

.lookup_grid_distinct_entry_h(pt, h, dgh, visited = nil, follow = true, return_grid_data = false, distinct = true) ⇒ Object 



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# File 'app/models/marty/data_grid.rb', line 425

def self.lookup_grid_distinct_entry_h(
  pt, h, dgh, visited = nil, follow = true,
  return_grid_data = false, distinct = true
)

  # Perform grid lookup, if result is another data_grid, and follow is true,
  # then perform lookup on the resulting grid.  Allows grids to be nested
  # as multi-grids.  If return_grid_data is true, also return the grid
  # data and metadata
  # return is a hash for the grid results:
  #
  #   "result"   => <result of running the grid>
  #   "name"     => <grid name>
  #   "data"     => <grid's data array>
  #   "metadata" => <grid's metadata (array of hashes)>

  vhash = if Rails.application.config.marty.data_grid_plpg_lookups &&
             Rails.env.test? # Keep plpg lookups for performance tests
            plpg_lookup_grid_distinct(h, dgh, return_grid_data, distinct)
          else
            ruby_lookup_grid_distinct(h, dgh, return_grid_data, distinct)
          end

  return vhash if vhash['result'].nil? || !dgh['data_type']

  c_data_type = Marty::DataGrid.convert_data_type(dgh['data_type'])

  return vhash if String === c_data_type

  res = vhash['result']

  v = if ::Marty::EnumHelper.pg_enum?(klass: res)
        c_data_type.find_by_name(res)
      elsif Marty::DataGrid == c_data_type
        follow ?
          Marty::DataGrid.lookup_h(pt, res) :
          Marty::DataGrid.lookup(pt, res)
      else
        Marty::DataConversion.find_row(c_data_type, { 'name' => res }, pt)
      end

  return vhash.merge('result' => v) unless
    Marty::DataGrid == c_data_type && follow

  visited ||= []

  visited << dgh['group_id']

  raise "#{self.class} recursion loop detected -- #{visited}" if
    visited.member?(v['group_id'])

  lookup_grid_distinct_entry_h(
    pt, h, v, visited, follow, return_grid_data, distinct)
end

.maybe_get_klass(type) ⇒ Object 



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# File 'app/models/marty/data_grid.rb', line 659

def self.maybe_get_klass(type)
    type.constantize unless INDEX_MAP[type] || type == 'float'
rescue NameError
    raise "unknown header type/klass: #{type}"
end

.null_value?(value, strict_null_mode) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'app/models/marty/data_grid.rb', line 586

def self.null_value?(value, strict_null_mode)
  return false unless value == NULL_STRING
  return true if strict_null_mode

  raise 'NULL is not supported in grids without strict_null_mode'
end

.parse(pt, grid_text, options) ⇒ Object

parse grid external representation into metadata/data



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# File 'app/models/marty/data_grid.rb', line 686

def self.parse(pt, grid_text, options)
  options[:headers] ||= false
  options[:col_sep] ||= "\t"

  pt ||= 'infinity'

  rows = CSV.new(grid_text, options).to_a
  blank_index = rows.find_index { |x| x.all?(&:nil?) }

  raise 'must have a blank row separating metadata' unless
    blank_index

  raise "can't import grid with trailing blank column" if
    rows.map { |r| r.last.nil? }.all?

  raise "last row can't be blank" if rows[-1].all?(&:nil?)

  data_type, lenient, strict_null_mode = nil, false, false

  # check if there's a data_type definition
  dt, constraint, *x = rows[0]
  if dt && x.all?(&:nil?)
    dts = dt.split

    lenient = dts.delete('lenient').present?
    strict_null_mode = dts.delete('strict_null_mode').present?
    data_type = dts.first
    raise "bad data type '#{dt}'" if dts.size > 1
  end

  constraint = nil if x.first.in?(['v', 'h'])

  start_md = constraint || data_type || lenient || strict_null_mode ? 1 : 0

  rows_for_metadata = rows[start_md...blank_index]
  metadata = rows_for_metadata.map do |attr, type, dir, rs_keep, key|
    raise 'metadata elements must include attr/type/dir' unless
      attr && type && dir
    raise "bad dir #{dir}" unless ['h', 'v'].member? dir
    raise "unknown metadata type #{type}" unless
      Marty::DataGrid.type_to_index(type)

    keys = key && parse_keys(pt, [key], type, strict_null_mode)
    nots = key && parse_nots([key])
    wildcards = key && parse_wildcards([key])

    res = {
      'attr' => attr,
      'type' => type,
      'dir'  => dir,
      'keys' => keys,
      'nots' => nots,
      'wildcards' => wildcards,
    }
    res['rs_keep'] = rs_keep if rs_keep
    res
  end

  v_infos = metadata.select { |inf| inf['dir'] == 'v' }
  h_infos = metadata.select { |inf| inf['dir'] == 'h' }

  # keys+data start right after blank_index
  data_index = blank_index + 1

  # process horizontal key rows
  h_infos.each_with_index do |inf, i|
    row = rows[data_index + i]

    raise "horiz. key row #{data_index + i} must include nil starting cells" if
      row[0, v_infos.count].any?

    inf['keys'] = parse_keys(pt, row[v_infos.count, row.count], inf['type'], strict_null_mode)
    inf['nots'] = parse_nots(row[v_infos.count, row.count])
    inf['wildcards'] = parse_wildcards(row[v_infos.count, row.count])
  end

  raise 'horiz. info keys length mismatch!' unless
    h_infos.map { |inf| inf['keys'].length }.uniq.count <= 1

  data_rows = rows[data_index + h_infos.count, rows.count]

  # process vertical key columns
  v_key_cols = data_rows.map { |r| r[0, v_infos.count] }.transpose

  v_infos.each_with_index do |inf, i|
    inf['keys'] = parse_keys(pt, v_key_cols[i], inf['type'], strict_null_mode)
    inf['nots'] = parse_nots(v_key_cols[i])
    inf['wildcards'] = parse_wildcards(v_key_cols[i])
  end

  raise 'vert. info keys length mismatch!' unless
    v_infos.map { |inf| inf['keys'].length }.uniq.count <= 1

  c_data_type = Marty::DataGrid.convert_data_type(data_type)

  raise "bad data type #{data_type}" unless c_data_type

  # based on data type, decide to check using convert or instance
  # lookup.  FIXME: DRY.

  if String === c_data_type
    tsym = c_data_type.to_sym

    data = data_rows.map do |r|
      r[v_infos.count, r.count].map do |v|
        next v unless v

        Marty::DataConversion.convert(v, tsym)
      end
    end
  else
    data = data_rows.map do |r|
      r[v_infos.count, r.count].map do |v|
        next v unless v

        next v if Marty::DataGrid.
                       find_class_instance(pt, c_data_type, v)

        raise "can't find key '#{v}' for class #{data_type}"
      end
    end
  end

  {
    metadata: metadata,
    data: data,
    data_type: data_type,
    lenient: lenient,
    strict_null_mode: strict_null_mode,
    constraint: constraint,
  }
end

.parse_fvalue(pt, passed_val, type, klass, strict_null_mode = false) ⇒ Object 



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# File 'app/models/marty/data_grid.rb', line 593

def self.parse_fvalue(pt, passed_val, type, klass, strict_null_mode = false)
  return unless passed_val

  v = remove_not(passed_val)

  return nil if null_value?(v, strict_null_mode)

  case type
  when 'numrange', 'int4range'
    Marty::Util.human_to_pg_range(v)
  when 'integer'
    v.split(ARRSEP).map do |val|
      next nil if null_value?(val, strict_null_mode)

      Integer(val) rescue raise "invalid integer: #{val}"
    end.uniq.sort_by(&:to_i)
  when 'float'
    v.split(ARRSEP).map do |val|
      next nil if null_value?(val, strict_null_mode)

      Float(val) rescue raise "invalid float: #{val}"
    end.uniq.sort
  when 'string'
    res = v.split(ARRSEP).uniq.sort.map do |val|
      next nil if null_value?(val, strict_null_mode)

      val
    end

    raise 'leading/trailing spaces in elements not allowed' if res.any? do |x|
      x != x&.strip
    end

    raise '0-length string not allowed' if res.any? do |x|
      x&.empty?
    end

    res
  when 'boolean'
    return nil if null_value?(v, strict_null_mode)

    case v.downcase
    when 'true', 't'
      true
    when 'false', 'f'
      false
    else
      raise "bad boolean #{v}"
    end
  else
    # AR class
    # FIXME: won't work if the obj identifier (name) has ARRSEP
    res = v.split(ARRSEP).uniq
    res.each do |k|
      begin
        # check to see if class instance actually exists
        Marty::DataGrid.
          find_class_instance(pt, klass, k) || raise(NoMethodError)
      rescue NoMethodError
        raise "instance #{k} of #{type} not found"
      end
    end
    res
  end
end

.parse_keys(pt, keys, type, strict_null_mode) ⇒ Object 



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# File 'app/models/marty/data_grid.rb', line 665

def self.parse_keys(pt, keys, type, strict_null_mode)
  klass = maybe_get_klass(type)

  keys.map do |v|
    parse_fvalue(pt, v, type, klass, strict_null_mode)
  end
end

.parse_nots(keys) ⇒ Object 



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# File 'app/models/marty/data_grid.rb', line 673

def self.parse_nots(keys)
  keys.map do |v|
    next false unless v

    v.starts_with?(NOT_STRING_START) && v.ends_with?(NOT_STRING_END)
  end
end

.parse_wildcards(keys) ⇒ Object 



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# File 'app/models/marty/data_grid.rb', line 681

def self.parse_wildcards(keys)
  keys.map(&:nil?)
end

.plpg_lookup_grid_distinct(h_passed, dgh, ret_grid_data = false, distinct = true) ⇒ Object 



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# File 'app/models/marty/data_grid.rb', line 344

def self.plpg_lookup_grid_distinct(h_passed, dgh, ret_grid_data = false,
                                   distinct = true)
  cd = dgh['created_dt']
  @@dtcache ||= {}
  @@dtcache[cd] ||= cd.strftime(PLV_DT_FMT)
  row_info = {
    'id'         => dgh['id'],
    'group_id'   => dgh['group_id'],
    'created_dt' => @@dtcache[cd]
  }

  h = dgh['metadata'].each_with_object({}) do |m, h|
    attr = m['attr']
    inc = h_passed.fetch(attr, :__nf__)
    next if inc == :__nf__

    val = (defined? inc.name) ? inc.name : inc
    h[attr] = val.is_a?(String) ?
                ActiveRecord::Base.connection.quote(val)[1..-2] : val
  end

  fn     = 'lookup_grid_distinct'
  hjson  = "'#{h.to_json}'::JSONB"
  rijson = "'#{row_info.to_json}'::JSONB"
  params = "#{hjson}, #{rijson}, #{ret_grid_data}, #{distinct}"
  sql    = "SELECT #{fn}(#{params})"
  raw    = ActiveRecord::Base.connection.execute(sql)[0][fn]
  res    = JSON.parse(raw)

  if res['error']
    msg = res['error']
    parms, sqls, ress, dg = res['error_extra'].values_at(
      'params', 'sql', 'results', 'dg')

    raise "DG #{name}: Error in PLPG call: #{msg}\n"\
          "params: #{parms}\n"\
          "sqls: #{sqls}\n"\
          "results: #{ress}\n"\
          "dg: #{dg}\n"\
          "ri: #{row_info}" if res['error']
  end

  res
end

.register_rule_handler(handler) ⇒ Object 



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# File 'app/models/marty/data_grid.rb', line 134

def self.register_rule_handler(handler)
  (@@rule_handlers ||= []) << handler
end

.ruby_lookup_grid_distinct(h_passed, dgh, ret_grid_data = false, distinct = true) ⇒ Object 



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# File 'app/models/marty/data_grid.rb', line 266

def self.ruby_lookup_grid_distinct(h_passed, dgh, ret_grid_data = false,
                                   distinct = true)

  grid = Marty::DataGrid.find(dgh['id'])
  indices = ruby_lookup_indices(h_passed, dgh)

  # We use the 0 as default, if there are no indices in that dir
  # Otherwise we find an intersection between all indices
  v_indices = if indices['v'].empty?
                [0]
              else
                indices['v'].reduce(:&)
              end

  h_indices = if indices['h'].empty?
                [0]
              else
                indices['h'].reduce(:&)
              end

  if distinct
    raise 'matches > 1' if v_indices.size > 1
    raise 'matches > 1' if h_indices.size > 1
  end

  v_index_min = v_indices.min
  h_index_min = h_indices.min

  if v_index_min.nil? || h_index_min.nil?
    nil_res = {
      'data' => nil,
      'name' => grid.name,
      'result' => nil,
      'metadata' => nil
    }

    return nil_res if grid.lenient && !ret_grid_data

    raise 'Data Grid lookup failed'
  end

  res2 = grid.data.dig(v_index_min, h_index_min)

  if ret_grid_data
    {
      'data' => grid.data,
       'name' => grid.name,
       'result' => res2,
       'metadata' => grid.metadata
    }
  else
    {
      'data' => nil,
      'name' => grid.name,
      'result' => res2,
      'metadata' => nil
    }
  end
rescue StandardError => e
  ri = {
    'id' => grid.id,
    'group_id' => grid.group_id,
    'created_dt' => grid.created_dt
  }

  dg = grid.attributes.reject do |k, _|
    next true if !ret_grid_data && k == 'data'

    k == 'permissions'
  end

  raise "DG #{name}: Error in Ruby call: #{e.message} \n"\
    "params: #{h_passed}\n"\
    "results: #{[h_indices, v_indices]}\n"\
    "dg: #{grid.attributes}\n"\
    "ri: #{ri}"
end

.ruby_lookup_indices(h_passed, dgh) ⇒ Object 



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# File 'app/models/marty/data_grid.rb', line 188

def self.ruby_lookup_indices(h_passed, dgh)
  dgh['metadata'].each_with_object({ 'v' => [], 'h' => [] }) do |m, h|
    attr = m['attr']

    inc = h_passed[attr]

    val = (defined? inc.name) ? inc.name : inc

    dir = m['dir']

    m_type = m['type']
    nots = m.fetch('nots', [])
    wildcards = m.fetch('wildcards', [])

    unless dgh['strict_null_mode']
      next unless h_passed.key?(attr)

      # FIXME: Treating passed nil in the same way
      # as missing broke our lookups. Maybe we should get back to it later.
      # Before missing attribute would match anything,
      # while explicitly passed nil would only match wildcard keys
      # We want to be consistent and treat nil attribute as missing one,
      # unless it's a stict_null_mode, where nil would be explicitly mapped
      # to NULL keys
      # next if val.nil?
    end

    converted_val = if val.nil?
                      nil
                    elsif m_type == 'string'
                      val.to_s
                    elsif m_type == 'integer'
                      val.to_i
                    elsif m_type == 'numrange'
                      val.to_f
                    elsif m_type == 'int4range'
                      val.to_i
                    elsif m_type == 'boolean'
                      ActiveModel::Type::Boolean.new.cast(val)
                    else
                      val
                    end

    arr = m['keys'].each_with_index.map do |key_val, index|
      wildcard = wildcards.fetch(index, true) # By default empty value is a wildcard

      next index if key_val.nil? && wildcard

      not_condition = nots[index]

      check_res = if ['int4range', 'numrange'].include?(m_type)
                    raise 'Data Grid lookup failed' if val.nil?

                    checks = Marty::Util.pg_range_to_ruby(key_val)
                    checks.all? do |check|
                      converted_val.send(check[0], check[1])
                    end
                  elsif key_val.nil?
                    val.nil?
                  elsif m_type == 'boolean'
                    key_val == converted_val
                  else
                    key_val.include?(converted_val)
                  end

      if check_res && !not_condition
        next index
      elsif !check_res && not_condition
        next index
      end

      nil
    end.compact

    h[dir] << arr
  end
end

.type_to_index(type) ⇒ Object 



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# File 'app/models/marty/data_grid.rb', line 163

def self.type_to_index(type)
  # map given header type to an index class -- uses string index
  # for ruby classes.
  return INDEX_MAP[type] if INDEX_MAP[type]

  INDEX_MAP['string'] if (type.constantize rescue nil)
end

Instance Method Details

#build_index ⇒ Object

FIXME: should be private



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# File 'app/models/marty/data_grid.rb', line 865

def build_index
  # create indices for the metadata
  metadata.each do |inf|
    attr = inf['attr']
    type = inf['type']
    keys = inf['keys']
    nots = inf.fetch('nots', [])

    # find index class
    idx_class = Marty::DataGrid.type_to_index(type)

    keys.each_with_index do |k, index|
      gi              = idx_class.new
      gi.attr         = attr
      gi.key          = k
      gi.created_dt   = created_dt
      gi.data_grid_id = group_id
      gi.index        = index
      gi.not          = nots[index] || false
      gi.save!
    end
  end
end

#dir_infos(dir) ⇒ Object 



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# File 'app/models/marty/data_grid.rb', line 480

def dir_infos(dir)
  metadata.select { |inf| inf['dir'] == dir }
end

#export ⇒ Object 



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# File 'app/models/marty/data_grid.rb', line 568

def export
   # return null string when called from Netzke on add_in_form
   return '' if metadata.nil? && data.nil?

   meta_rows, h_key_rows, data_rows = export_array

   Marty::DataExporter.
     to_csv(meta_rows + [[]] + h_key_rows + data_rows,
            'col_sep' => "\t",
           ).
     gsub(/\"\"/, '') # remove "" to beautify output
end

#export=(text) ⇒ Object

FIXME: this is only here to appease Netzke add_in_form



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# File 'app/models/marty/data_grid.rb', line 531

def export=(text)
end

#export_array ⇒ Object 



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# File 'app/models/marty/data_grid.rb', line 534

def export_array
  # add data type metadata row if not default
  lenstr = 'lenient' if lenient
  strict_null_mode_str = 'strict_null_mode' if strict_null_mode

  typestr = data_type unless [nil, DEFAULT_DATA_TYPE].member?(data_type)
  len_type = [lenstr, strict_null_mode_str, typestr].compact.join(' ')

  meta_rows = if len_type.present? || constraint.present?
                [[len_type, constraint].compact]
              else
                []
              end

  meta_rows += metadata.map do |inf|
    [inf['attr'], inf['type'], inf['dir'], inf['rs_keep'] || '']
  end

  v_infos, h_infos = dir_infos('v'), dir_infos('h')

  h_key_rows = h_infos.map do |inf|
    [nil] * v_infos.count + self.class.export_keys(inf)
  end

  transposed_v_keys = v_infos.empty? ? [[]] :
    v_infos.map { |inf| self.class.export_keys(inf) }.transpose

  data_rows = transposed_v_keys.each_with_index.map do |keys, i|
    keys + (data[i] || [])
  end

  [meta_rows, h_key_rows, data_rows]
end

#freeze ⇒ Object 



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# File 'app/models/marty/data_grid.rb', line 127

def freeze
  # FIXME: mcfly lookups freeze their results in order to protect
  # the cache.  That doesn't interact correctly with lazy_load which
  # modifies the attr hash at runtime.
  self
end

#save ⇒ Object

FIXME: hacky – save is just save!



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# File 'app/models/marty/data_grid.rb', line 159

def save
  save!
end

#save! ⇒ Object

FIXME: not sure what’s the right way to perform the save in a transaction – i.e. together with build_index. before_save would be OK, but then save inside it would cause an infinite loop.



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# File 'app/models/marty/data_grid.rb', line 145

def save!
  if changed?
    transaction do
      nc, nw, n = [name_changed?, name_was, name]
      res = super
      update_rules(nw, n) if nc && nw.present?
      reload
      build_index
      res
    end
  end
end

#to_s ⇒ Object 



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# File 'app/models/marty/data_grid.rb', line 123

def to_s
  name
end

#update_from_import(name, import_text, created_dt = nil) ⇒ Object 



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# File 'app/models/marty/data_grid.rb', line 842

def update_from_import(name, import_text, created_dt = nil)
  parsed_result = self.class.parse(created_dt, import_text, {})

  new_metadata = parsed_result[:metadata]
  data = parsed_result[:data]
  data_type = parsed_result[:data_type]
  lenient = parsed_result[:lenient]
  constraint = parsed_result[:constraint]
  strict_null_mode = parsed_result[:strict_null_mode]

  self.name             = name
  self.data             = data
  self.data_type        = data_type
  self.lenient          = !!lenient
  self.strict_null_mode = strict_null_mode
  # Otherwise changed will depend on order in hashes
  self.metadata         = new_metadata unless metadata == new_metadata
  self.constraint       = constraint
  self.created_dt       = created_dt if created_dt
  save!
end

#update_rules(old, new) ⇒ Object 



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# File 'app/models/marty/data_grid.rb', line 138

def update_rules(old, new)
  @@rule_handlers.each { |rh| rh.call(old, new) }
end