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class GroupChildSerializer < BaseSerializer
include WithPagination
attr_reader :hierarchy_root, :should_expand_hierarchy
entity GroupChildEntity
def expand_hierarchy(hierarchy_root = nil)
@hierarchy_root = hierarchy_root
@should_expand_hierarchy = true
self
end
def represent(resource, opts = {}, entity_class = nil)
if should_expand_hierarchy
paginator.paginate(resource) if paginated?
represent_hierarchies(resource, opts)
else
super(resource, opts)
end
end
protected
def represent_hierarchies(children, opts)
if children.is_a?(GroupDescendant)
represent_hierarchy(children.hierarchy(hierarchy_root), opts).first
else
hierarchies = GroupDescendant.build_hierarchy(children, hierarchy_root)
# When an array was passed, we always want to represent an array.
# Even if the hierarchy only contains one element
represent_hierarchy(Array.wrap(hierarchies), opts)
end
end
def represent_hierarchy(hierarchy, opts)
serializer = self.class.new(params)
if hierarchy.is_a?(Hash)
hierarchy.map do |parent, children|
serializer.represent(parent, opts)
.merge(children: Array.wrap(serializer.represent_hierarchy(children, opts)))
end
elsif hierarchy.is_a?(Array)
hierarchy.flat_map { |child| serializer.represent_hierarchy(child, opts) }
else
serializer.represent(hierarchy, opts)
end
end
end
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