diff options
Diffstat (limited to 'activerecord/lib/active_record/relation/predicate_builder/array_handler.rb')
-rw-r--r-- | activerecord/lib/active_record/relation/predicate_builder/array_handler.rb | 45 |
1 files changed, 45 insertions, 0 deletions
diff --git a/activerecord/lib/active_record/relation/predicate_builder/array_handler.rb b/activerecord/lib/active_record/relation/predicate_builder/array_handler.rb new file mode 100644 index 0000000000..4b5f5773a0 --- /dev/null +++ b/activerecord/lib/active_record/relation/predicate_builder/array_handler.rb @@ -0,0 +1,45 @@ +require 'active_support/core_ext/string/filters' + +module ActiveRecord + class PredicateBuilder + class ArrayHandler # :nodoc: + def initialize(predicate_builder) + @predicate_builder = predicate_builder + end + + def call(attribute, value) + values = value.map { |x| x.is_a?(Base) ? x.id : x } + nils, values = values.partition(&:nil?) + + return attribute.in([]) if values.empty? && nils.empty? + + ranges, values = values.partition { |v| v.is_a?(Range) } + + values_predicate = + case values.length + when 0 then NullPredicate + when 1 then predicate_builder.build(attribute, values.first) + else attribute.in(values) + end + + unless nils.empty? + values_predicate = values_predicate.or(predicate_builder.build(attribute, nil)) + end + + array_predicates = ranges.map { |range| predicate_builder.build(attribute, range) } + array_predicates.unshift(values_predicate) + array_predicates.inject { |composite, predicate| composite.or(predicate) } + end + + protected + + attr_reader :predicate_builder + + module NullPredicate # :nodoc: + def self.or(other) + other + end + end + end + end +end |