Class: CurrentScope::SubjectsController

Inherits:
ApplicationController show all
Defined in:
app/controllers/current_scope/subjects_controller.rb

Constant Summary collapse

PER_PAGE = 
50
SEARCH_COLUMNS =

Identity columns searched by ?q=, in the same preference order as current_scope_subject_label's default chain. Intersected with the subject table's real column_names before use, so a query never spans a page.

%w[email email_address name first_name last_name].freeze

Instance Method Summary collapse

Instance Method Details

#index ⇒ Object 



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# File 'app/controllers/current_scope/subjects_controller.rb', line 10

def index
  @query = params[:q].to_s.strip
  scope = filter_subjects(subject_class.order(:id), @query)

  @page = [ params[:page].to_i, 1 ].max
  @subjects = scope.limit(PER_PAGE).offset((@page - 1) * PER_PAGE)
  @has_next_page = scope.offset(@page * PER_PAGE).exists?

  @roles = Role.order(:name)
  # Match on the ids as strings: `where(subject: @subjects)` would build
  # `subject_id IN (SELECT id ...)`, comparing a varchar column to a bigint
  # subquery, which PostgreSQL refuses (#151).
  # Group by each subject's OWN polymorphic_name, not the configured class's:
  # an STI subclass that overrides it stores grants under a different token, so
  # a single where(subject_type:) would omit them (#151). One type in the
  # common case; the per-type OR keeps the STI case correct for one extra WHERE.
  subject_ids_by_type = @subjects.group_by { |subject| subject.class.polymorphic_name }
                                 .transform_values { |subjects| subjects.map { |subject| subject.id.to_s } }
  assignment_scope = subject_ids_by_type.reduce(RoleAssignment.none) do |relation, (type, ids)|
    relation.or(RoleAssignment.where(subject_type: type, subject_id: ids))
  end
  @assignments = assignment_scope
                               .index_by { |a| [ a.subject_type, a.subject_id.to_s ] }
  # Safe polymorphic resource preload (resolvable types only) — full
  # includes(:resource) NameErrors on a stale resource_type and 500s the
  # page; skip-unresolvable + label as inert instead (#90 / PR #104).
  scoped_scope = subject_ids_by_type.reduce(ScopedRoleAssignment.none) do |relation, (type, ids)|
    relation.or(ScopedRoleAssignment.where(subject_type: type, subject_id: ids))
  end
  scoped_rows = scoped_scope.includes(:role).to_a
  ScopedRoleAssignment.preload_resolvable_resources!(scoped_rows)
  # to_s to match the view's key: subject_id is a string column (#151).
  @scoped = scoped_rows.group_by { |a| [ a.subject_type, a.subject_id.to_s ] }
end