I use mongoid version 4.0.0.beta1

Here is my model:

class Project
...
embeds_many :bim_objects
has_many :model_containers, inverse_of: :project, autosave: true
...

class ModelContainer
...
belongs_to :project, inverse_of: :model_containers, autosave: true

field :bim_object_ids, type: Array, default: ->

...

In other model, I need to delete only some bim_objects from model_container object

model_container.project.bim_objects.in(id: model_container.bim_object_ids).all.delete_all
model_container.bim_object_ids = []
...
#build new bim_object

delete_all not working, and I got duplicated bim_objects, while it should delete all old bim_objects and store new ones.

I also add a callback in ModelContainer to delete all bim_objects that it's refer:

before_destroy :destroy_bim_objects

def destroy_bim_objects
unless bim_object_ids.empty?
project.bim_objects.in(id: bim_object_ids).all.delete_all
end
end

Somehow, if there are 25 bim_objects, only 23 got deleted.

Here also the result from console:

2.0.0-p353 :136 > project.bim_objects.count
=> 27
2.0.0-p353 :137 > project.bim_objects.count
=> 27
2.0.0-p353 :138 > project.bim_objects.delete_all
=> 27
2.0.0-p353 :139 > project.reload
2.0.0-p353 :140 > project.bim_objects.count
=> 9
2.0.0-p353 :141 > project.bim_objects.delete_all
=> 9
2.0.0-p353 :142 > project.reload
2.0.0-p353 :143 > project.bim_objects.count
=> 9
2.0.0-p353 :144 > project.bim_objects.collect(&:destroy!)
=> [true, true, true, true, true]
2.0.0-p353 :145 > project.reload
2.0.0-p353 :146 > project.bim_objects.count
=> 4

Somehow, there are objects that stubborn and refuse to be destroyed. MOPED log show no errors, $pullAll query executed as expedted, but some objects still embedded into project.

I have review other issues, even follow this blog post:
http://bashar3a.com/2013/12/05/deleting-and-destroying-embedded-documents-in-mongoid-with-rails-4/

Any clue what did I dealing with? Will changing embedded into referenced solve this problems?

Thanks,