demarches-normaliennes/app/models/dossier_preloader.rb
2022-11-10 22:44:39 +00:00

113 lines
3.5 KiB
Ruby

class DossierPreloader
DEFAULT_BATCH_SIZE = 2000
def initialize(dossiers)
@dossiers = dossiers
end
def in_batches(size = DEFAULT_BATCH_SIZE)
dossiers = @dossiers.to_a
dossiers.each_slice(size) { |slice| load_dossiers(slice) }
dossiers
end
def all(pj_template: false)
dossiers = @dossiers.to_a
load_dossiers(dossiers, pj_template:)
dossiers
end
def self.load_one(dossier, pj_template: false)
DossierPreloader.new([dossier]).all(pj_template: pj_template).first
end
private
# returns: { revision_id : { type_de_champ_id : position } }
def positions
@positions ||= ProcedureRevisionTypeDeChamp
.where(revision_id: @dossiers.pluck(:revision_id).uniq)
.select(:revision_id, :type_de_champ_id, :position)
.group_by(&:revision_id)
.transform_values do |coordinates|
coordinates.index_by(&:type_de_champ_id).transform_values(&:position)
end
end
def load_dossiers(dossiers, pj_template: false)
to_include = [piece_justificative_file_attachment: :blob]
if pj_template
to_include << { type_de_champ: { piece_justificative_template_attachment: :blob } }
else
to_include << :type_de_champ
end
all_champs = Champ
.includes(to_include)
.where(dossier_id: dossiers)
.to_a
load_etablissements(all_champs)
children_champs, root_champs = all_champs.partition(&:child?)
champs_by_dossier = root_champs.group_by(&:dossier_id)
champs_by_dossier_by_parent = children_champs
.group_by(&:dossier_id)
.transform_values do |champs|
champs.group_by(&:parent_id)
end
dossiers.each do |dossier|
load_dossier(dossier, champs_by_dossier[dossier.id] || [], champs_by_dossier_by_parent[dossier.id] || {})
end
end
def load_etablissements(champs)
champs_siret = champs.filter(&:siret?)
etablissements_by_id = Etablissement.where(id: champs_siret.map(&:etablissement_id).compact).index_by(&:id)
champs_siret.each do |champ|
etablissement = etablissements_by_id[champ.etablissement_id]
champ.association(:etablissement).target = etablissement
if etablissement
etablissement.association(:champ).target = champ
end
end
end
def load_dossier(dossier, champs, children_by_parent = {})
champs_public, champs_private = champs.partition(&:public?)
load_champs(dossier, :champs_public, champs_public, dossier, children_by_parent)
load_champs(dossier, :champs_private, champs_private, dossier, children_by_parent)
# We need to do this because of the check on `Etablissement#champ` in
# `Etablissement#libelle_for_export`. By assigning `nil` to `target` we mark association
# as loaded and so the check on `Etablissement#champ` will not trigger n+1 query.
if dossier.etablissement
dossier.etablissement.association(:champ).target = nil
end
end
def load_champs(parent, name, champs, dossier, children_by_parent)
champs.each do |champ|
champ.association(:dossier).target = dossier
if parent.is_a?(Champ)
champ.association(:parent).target = parent
end
end
parent.association(name).target = champs.sort_by do |champ|
[champ.row, positions[dossier.revision_id][champ.type_de_champ_id]]
end
# Load children champs
champs.filter(&:block?).each do |parent_champ|
champs = children_by_parent[parent_champ.id] || []
parent_champ.association(:dossier).target = dossier
load_champs(parent_champ, :champs, champs, dossier, children_by_parent)
end
end
end