Module: LcpRuby::AssociationJoinColumn

Defined in:
lib/lcp_ruby/association_join_column.rb

Overview

Helper for resolving the join column on an association — i.e., the column whose value the form / search / cascading-select / page-parameter submits as the FK value.

For belongs_to with ‘primary_key:` set, the join column is that custom column on the target. Otherwise it is the target’s actual primary key column (usually “id”).

Used by Layer B consumers (form_helper, resources_controller, association_options_builder, view partials, page parameter resolver, virtual_columns/builder, import row processor, …) which bypass AR’s reflection and need the column name directly.

Class Method Summary collapse

Class Method Details

.for(assoc, target_class = nil) ⇒ String

Returns the column name to read off a target record.

Parameters:

Returns:

  • (String) —

    the column name to read off a target record



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# File 'lib/lcp_ruby/association_join_column.rb', line 21

def for(assoc, target_class = nil)
  return assoc.primary_key if assoc.primary_key.present?

  target_class ||= LcpRuby.registry.model_for(assoc.target_model)
  target_class.primary_key
end