ActiveModel::EachValidator
Unfortunately, we have to tie Uniqueness validators to a class.
# File lib/active_record/validations/uniqueness.rb, line 11 11: def setup(klass) 12: @klass = klass 13: end
# File lib/active_record/validations/uniqueness.rb, line 15 15: def validate_each(record, attribute, value) 16: finder_class = find_finder_class_for(record) 17: table = finder_class.unscoped 18: 19: table_name = record.class.quoted_table_name 20: sql, params = mount_sql_and_params(finder_class, table_name, attribute, value) 21: 22: relation = table.where(sql, *params) 23: 24: Array.wrap(options[:scope]).each do |scope_item| 25: scope_value = record.send(scope_item) 26: relation = relation.where(scope_item => scope_value) 27: end 28: 29: unless record.new_record? 30: # TODO : This should be in Arel 31: relation = relation.where("#{record.class.quoted_table_name}.#{record.class.primary_key} <> ?", record.send(:id)) 32: end 33: 34: if relation.exists? 35: record.errors.add(attribute, :taken, options.except(:case_sensitive, :scope).merge(:value => value)) 36: end 37: end
Disabled; run with --debug to generate this.
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