Class: Persistors::ModelStore

Inherits:
Store show all
Includes:
StoreState
Defined in:
lib/volt/models/persistors/model_store.rb

Constant Summary collapse

ID_CHARS = 
[('a'..'f'), ('0'..'9')].map {|v| v.to_a }.flatten

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Methods included from StoreState

#change_state_to, #loaded, #state

Methods inherited from Store

#read_new_model, #saved?

Methods inherited from Base

#added, #event_removed, #loaded, #removed

Constructor Details

#initialize(model, tasks) ⇒ ModelStore

Returns a new instance of ModelStore.



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# File 'lib/volt/models/persistors/model_store.rb', line 13

def initialize(model, tasks)
  super

  @in_identity_map = false
end

Instance Attribute Details

#in_identity_map ⇒ Object

Returns the value of attribute in_identity_map.



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# File 'lib/volt/models/persistors/model_store.rb', line 11

def in_identity_map
  @in_identity_map
end

#model ⇒ Object (readonly)

Returns the value of attribute model.



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# File 'lib/volt/models/persistors/model_store.rb', line 10

def model
  @model
end

Class Method Details

.changed(model_id, data) ⇒ Object

Update the models based on the id/identity map. Usually these requests will come from the backend.



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# File 'lib/volt/models/persistors/model_store.rb', line 93

def self.changed(model_id, data)
  model = @@identity_map.lookup(model_id)

  if model
    data.each_pair do |key, value|
      if key != '_id'
        model.send(:"#{key}=", value)
      end
    end
  end
end

Instance Method Details

#[](val) ⇒ Object 



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# File 'lib/volt/models/persistors/model_store.rb', line 105

def [](val)
  raise "Models do not support hash style lookup.  Hashes inserted into other models are converted to models, see https://github.com/voltrb/volt#automatic-model-conversion"
end

#add_to_collection ⇒ Object 



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# File 'lib/volt/models/persistors/model_store.rb', line 19

def add_to_collection
  @in_collection = true
  ensure_setup
  changed
end

#add_to_identity_map ⇒ Object 



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# File 'lib/volt/models/persistors/model_store.rb', line 38

def add_to_identity_map
  unless @in_identity_map
    @@identity_map.add(@model._id, @model)

    @in_identity_map = true
  end
end

#changed(attribute_name = nil) ⇒ Object

Called when the model changes



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# File 'lib/volt/models/persistors/model_store.rb', line 55

def changed(attribute_name=nil)
  path = @model.path

  promise = Promise.new

  ensure_setup

  path_size = path.size
  if !(defined?($loading_models) && $loading_models) && @tasks && path_size > 0 && !@model.nil?
    if path_size > 3 && (parent = @model.parent) && source = parent.parent
      @model.attributes[:"#{path[-4].singularize}_id"] = source._id
    end

    if !collection
      puts "Attempting to save model directly on store."
      raise "Attempting to save model directly on store."
    else
      @tasks.call('StoreTasks', 'save', collection, self_attributes) do |errors|
        if errors.size == 0
          promise.resolve
        else
          promise.reject(errors)
        end
      end
    end
  end

  return promise
end

#ensure_setup ⇒ Object

Called the first time a value is assigned into this model



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# File 'lib/volt/models/persistors/model_store.rb', line 30

def ensure_setup
  if @model.attributes
    @model.attributes[:_id] ||= generate_id

    add_to_identity_map
  end
end

#event_added(event, scope_provider, first, first_for_event) ⇒ Object 



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# File 'lib/volt/models/persistors/model_store.rb', line 85

def event_added(event, scope_provider, first, first_for_event)
  if first_for_event && event == :changed
    ensure_setup
  end
end

#generate_id ⇒ Object

Create a random unique id that can be used as the mongo id as well



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# File 'lib/volt/models/persistors/model_store.rb', line 47

def generate_id
  id = []
  24.times { id << ID_CHARS.sample }

  return id.join
end

#remove_from_collection ⇒ Object 



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# File 'lib/volt/models/persistors/model_store.rb', line 25

def remove_from_collection
  @in_collection = false
end