Class: DataMapper::Collection

Inherits:
Object
  • Object
show all
Defined in:
lib/dm-adjust/collection.rb

Instance Method Summary collapse

Instance Method Details

#adjust(attributes = {}, reload = false) ⇒ Object

Raises:

  • (NotImplementedError) 


4
5
6
 
# File 'lib/dm-adjust/collection.rb', line 4

def adjust(attributes = {}, reload = false)
  raise NotImplementedError, 'adjust *with* validations has not be written yet, try adjust!'
end

#adjust!(attributes = {}, reload = false) ⇒ Object

increment or decrement attributes on a collection

Examples:

Usage 
* People.all.adjust(:salary => +1000)
* Children.all(:age.gte => 18).adjust(:allowance => -100)

Parameters:

  • attributes (Hash) (defaults to: {}) —

    A hash of attributes to adjust, and their adjustment

  • reload (FalseClass, TrueClass) (defaults to: false) —

    If true, affected objects will be reloaded



19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
 
# File 'lib/dm-adjust/collection.rb', line 19

def adjust!(attributes = {}, reload = false)
  return true if attributes.empty?

  reload_conditions = if reload
    model_key = model.key(repository.name)
    Query.target_conditions(self, model_key, model_key)
  end

  adjust_attributes = adjust_attributes(attributes)
  repository.adjust(adjust_attributes, self)

  if reload_conditions
    @query.clear
    @query.update(:conditions => reload_conditions)
    self.reload
  end

  true
end