Class: JsonapiCompliable::Stats::DSL

Inherits:
Object
  • Object
show all
Defined in:
lib/jsonapi_compliable/stats/dsl.rb

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(config) ⇒ DSL

Returns a new instance of DSL.



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# File 'lib/jsonapi_compliable/stats/dsl.rb', line 16

def initialize(config)
  config = { config => [] } if config.is_a?(Symbol)

  @calculations = {}
  @name = config.keys.first
  Array(config.values.first).each { |c| send(:"#{c}!") }
end

Dynamic Method Handling

This class handles dynamic methods through the method_missing method

#method_missing(meth, *args, &blk) ⇒ Object 



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# File 'lib/jsonapi_compliable/stats/dsl.rb', line 24

def method_missing(meth, *args, &blk)
  @calculations[meth] = blk
end

Instance Attribute Details

#calculations ⇒ Object (readonly)

Returns the value of attribute calculations.



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# File 'lib/jsonapi_compliable/stats/dsl.rb', line 4

def calculations
  @calculations
end

#name ⇒ Object (readonly)

Returns the value of attribute name.



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# File 'lib/jsonapi_compliable/stats/dsl.rb', line 4

def name
  @name
end

Class Method Details

.defaults ⇒ Object 



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# File 'lib/jsonapi_compliable/stats/dsl.rb', line 6

def self.defaults
  {
    count: ->(scope, attr) { scope.count },
    average: ->(scope, attr) { scope.average(attr).to_f },
    sum: ->(scope, attr) { scope.sum(attr) },
    maximum: ->(scope, attr) { scope.maximum(attr) },
    minimum: ->(scope, attr) { scope.minimum(attr) }
  }
end

Instance Method Details

#average! ⇒ Object 



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# File 'lib/jsonapi_compliable/stats/dsl.rb', line 41

def average!
  @calculations[:average] = self.class.defaults[:average]
end

#calculation(name) ⇒ Object 



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# File 'lib/jsonapi_compliable/stats/dsl.rb', line 28

def calculation(name)
  callable = @calculations[name] || @calculations[name.to_sym]
  callable || raise(Errors::StatNotFound.new(@name, name))
end

#count! ⇒ Object 



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# File 'lib/jsonapi_compliable/stats/dsl.rb', line 33

def count!
  @calculations[:count] = self.class.defaults[:count]
end

#maximum! ⇒ Object 



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# File 'lib/jsonapi_compliable/stats/dsl.rb', line 45

def maximum!
  @calculations[:maximum] = self.class.defaults[:maximum]
end

#minimum! ⇒ Object 



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# File 'lib/jsonapi_compliable/stats/dsl.rb', line 49

def minimum!
  @calculations[:minimum] = self.class.defaults[:minimum]
end

#sum! ⇒ Object 



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# File 'lib/jsonapi_compliable/stats/dsl.rb', line 37

def sum!
  @calculations[:sum] = self.class.defaults[:sum]
end