Class: MongoidHashQuery::Aggregation

Inherits:
Object
  • Object
show all
Includes:
Helpers
Defined in:
lib/mongoid_hash_query/aggregation.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Methods included from Helpers

#model_class_name

Constructor Details

#initialize(resource, params, model: nil) ⇒ Aggregation

Returns a new instance of Aggregation.



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# File 'lib/mongoid_hash_query/aggregation.rb', line 7

def initialize(resource, params, model: nil)
  @configuration = Module.nesting.last.configuration
  @resource = resource
  @params = HashWithIndifferentAccess.new(params)
  @model = model

  unless @model
    @model = model_class_name(@resource)
  end
end

Instance Attribute Details

#configuration ⇒ Object (readonly)

Returns the value of attribute configuration.



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# File 'lib/mongoid_hash_query/aggregation.rb', line 5

def configuration
  @configuration
end

#model ⇒ Object (readonly)

Returns the value of attribute model.



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# File 'lib/mongoid_hash_query/aggregation.rb', line 5

def model
  @model
end

#params ⇒ Object (readonly)

Returns the value of attribute params.



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# File 'lib/mongoid_hash_query/aggregation.rb', line 5

def params
  @params
end

#resource ⇒ Object (readonly)

Returns the value of attribute resource.



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# File 'lib/mongoid_hash_query/aggregation.rb', line 5

def resource
  @resource
end

Instance Method Details

#apply ⇒ Object 



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# File 'lib/mongoid_hash_query/aggregation.rb', line 18

def apply
  if params[:aggregate].is_a? Hash
    meta_attributes = HashWithIndifferentAccess.new

    params[:aggregate].each do |field, asked_aggrs|
      #next if @model.fields[field].nil? #allow on embedded documents too
      next unless params[:aggregate][field].is_a? Hash

      if @model.fields[field]
        case @model.fields[field].options[:type].to_s.downcase.to_sym
        when :integer, :float, :bigdecimal
          meta_attributes[field] = apply_aggregations(
            {avg: :avg, sum: :sum, max: :max, min: :min},
            params[:aggregate][field],
            field
          )

        when :date, :datetime, :time, :timewithzone,
          meta_attributes[field] = apply_aggregations(
            {max: :max, min: :min},
            params[:aggregate][field],
            field
          )
        end
      else
        meta_attributes[field] = apply_aggregations(
          {avg: :avg, sum: :sum, max: :max, min: :min},
          params[:aggregate][field],
          field
        )
      end
    end
  end

  return {aggregations: meta_attributes}
end

#apply_aggregations(available_aggr, asked_aggr, field) ⇒ Object 



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# File 'lib/mongoid_hash_query/aggregation.rb', line 55

def apply_aggregations(available_aggr, asked_aggr, field)
  meta_attributes = HashWithIndifferentAccess.new

  available_aggr.each do |k, v|
    if asked_aggr[k]
      meta_attributes[k] = resource.send(v,field)
      meta_attributes[k] = meta_attributes[k].to_f if meta_attributes[k].is_a? BigDecimal
    end
  end

  return meta_attributes
end