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module ActiveRecord
class PredicateBuilder
class AssociationQueryHandler # :nodoc:
def self.value_for(table, column, value)
associated_table = table.associated_table(column)
if associated_table.polymorphic_association?
case value.is_a?(Array) ? value.first : value
when Base, Relation
value = [value] unless value.is_a?(Array)
klass = PolymorphicArrayValue
end
end
klass ||= AssociationQueryValue
klass.new(associated_table, value)
end
def initialize(predicate_builder)
@predicate_builder = predicate_builder
end
def call(attribute, value)
predicate_builder.build_from_hash(value.queries)
end
# TODO Change this to private once we've dropped Ruby 2.2 support.
# Workaround for Ruby 2.2 "private attribute?" warning.
protected
attr_reader :predicate_builder
end
class AssociationQueryValue # :nodoc:
attr_reader :associated_table, :value
def initialize(associated_table, value)
@associated_table = associated_table
@value = value
end
def queries
{ associated_table.association_foreign_key.to_s => ids }
end
private
def ids
case value
when Relation
value.select_values.empty? ? value.select(primary_key) : value
when Array
value.map { |v| convert_to_id(v) }
else
convert_to_id(value)
end
end
def primary_key
associated_table.association_primary_key
end
def convert_to_id(value)
case value
when Base
value._read_attribute(primary_key)
else
value
end
end
end
end
end
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