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Type:
Task
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Resolution: Done
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Affects Version/s: None
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Component/s: None
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None
I need to use cascading callbacks for various reasons. In an embedded doc's before_destroy there is currently no way to determine if the parent is being destroyed. flagged_for_destroy isn't being set in that case. I need to know this because in the case of just deleting the child I need to do certain things that wouldn't be done if the parent is being deleted.
This is the current behavior I'm seeing:
class Parent include Mongoid::Document embeds_many :childs, :cascade_callbacks => true before_destroy :before_callback after_destroy :after_callback def before_callback puts puts 'Parent#before_callback' puts " flagged_for_destroy? = #{flagged_for_destroy?}" puts " destroyed? = #{destroyed?}" end def after_callback puts puts 'Parent#after_callback' puts " flagged_for_destroy? = #{flagged_for_destroy?}" puts " destroyed? = #{destroyed?}" end end class Child include Mongoid::Document embedded_in :parent before_destroy :before_callback after_destroy :after_callback def before_callback puts puts 'Child#before_callback' puts " parent is a #{parent.class} = #{parent.inspect}" puts " parent.flagged_for_destroy? = #{parent.flagged_for_destroy?}" puts " parent.destroyed? = #{parent.destroyed?}" end def after_callback puts puts 'Child#after_callback' puts " parent is a #{parent.class} = #{parent.inspect}" puts " parent.flagged_for_destroy? = #{parent.flagged_for_destroy?}" puts " parent.destroyed? = #{parent.destroyed?}" end end p = Parent.new p.childs.create p.save p.destroy
produces this output:
Child#before_callback parent is a Parent = #<Parent _id: 4ed2b0d98035442c11000001, _type: nil> parent.flagged_for_destroy? = false parent.destroyed? = false Parent#before_callback flagged_for_destroy? = false destroyed? = false Parent#after_callback flagged_for_destroy? = false destroyed? = true Child#after_callback parent is a Parent = #<Parent _id: 4ed2b0d98035442c11000001, _type: nil> parent.flagged_for_destroy? = false parent.destroyed? = true
I'm pretty sure this isn't the right way to do it, but if I set the flagged_for_destroy bool in Persistance#destroy (https://github.com/iamnader/mongoid-2/commit/6645e1f1db4b3697fdf91b1526cac1fd5c3b7b47) than I get these results which seem to make a lot more sense to me:
Child#before_callback parent is a Parent = #<Parent _id: 4ed30133803544342d000001, _type: nil> parent.flagged_for_destroy? = true parent.destroyed? = false Parent#before_callback flagged_for_destroy? = true destroyed? = false Parent#after_callback flagged_for_destroy? = true destroyed? = true Child#after_callback parent is a Parent = #<Parent _id: 4ed30133803544342d000001, _type: nil> parent.flagged_for_destroy? = true parent.destroyed? = true