Module: Volt::Buffer

Included in:
Model
Defined in:
lib/volt/models/buffer.rb

Instance Method Summary collapse

Instance Method Details

#buffer ⇒ Object

Returns a buffered version of the model



51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
 
# File 'lib/volt/models/buffer.rb', line 51

def buffer
  model_path = options[:path]

  # When we grab a buffer off of a plual class (subcollection), we get it as a model.
  if model_path.last.plural? && model_path[-1] != :[]
    model_klass = class_at_path(model_path + [:[]])
  else
    model_klass = class_at_path(model_path)
  end

  new_options = options.merge(path: model_path, save_to: self).reject { |k, _| k.to_sym == :persistor }
  model       = model_klass.new({}, new_options, :loading)

  if state == :loaded
    setup_buffer(model)
  else
    parent.then do
      setup_buffer(model)
    end
  end

  model
end

#promise_for_errors(errors) ⇒ Object

When errors come in, we mark all fields and return a rejected promise.



44
45
46
47
48
 
# File 'lib/volt/models/buffer.rb', line 44

def promise_for_errors(errors)
  mark_all_fields!

  Promise.new.reject(errors)
end

#save! ⇒ Object 



4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
 
# File 'lib/volt/models/buffer.rb', line 4

def save!
  # Compute the erros once
  errors = self.errors

  if errors.size == 0
    save_to = options[:save_to]
    if save_to
      if save_to.is_a?(ArrayModel)
        # Add to the collection
        promise = save_to.append(attributes)
      else
        # We have a saved model
        promise = save_to.assign_attributes(attributes)
      end

      return promise.then do |new_model|
        if new_model
          # Set the buffer's id to track the main model's id
          attributes[:_id] = new_model._id
          options[:save_to]     = new_model
        end

        nil
      end.fail do |errors|
        if errors.is_a?(Hash)
          server_errors.replace(errors)
        end

        promise_for_errors(errors)
      end
    else
      fail 'Model is not a buffer, can not be saved, modifications should be persisted as they are made.'
    end
  else
    # Some errors, mark all fields
    promise_for_errors(errors)
  end
end