Class: Casino::Projection

Inherits:
Object
  • Object
show all
Defined in:
lib/casino/projection.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(klass, pipeline = []) ⇒ Projection

Returns a new instance of Projection.



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# File 'lib/casino/projection.rb', line 5

def initialize(klass, pipeline = [])
  self.target = klass
  self.pipeline = pipeline
end

Instance Attribute Details

#pipeline ⇒ Object

Returns the value of attribute pipeline.



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# File 'lib/casino/projection.rb', line 3

def pipeline
  @pipeline
end

#target ⇒ Object

Returns the value of attribute target.



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# File 'lib/casino/projection.rb', line 3

def target
  @target
end

Instance Method Details

#group(conditions) ⇒ Object Also known as: pivot 



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# File 'lib/casino/projection.rb', line 18

def group(conditions)
  clone_with group: conditions
end

#limit(conditions) ⇒ Object 



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# File 'lib/casino/projection.rb', line 50

def limit(conditions)
  clone_with limit: conditions
end

#match(conditions) ⇒ Object Also known as: where, find 



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# File 'lib/casino/projection.rb', line 34

def match(conditions)
  clone_with match: conditions
end

#mongoize(hash) ⇒ Object 



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# File 'lib/casino/projection.rb', line 14

def mongoize(hash)
  hash.keys.map { |key| build_mongoized_hash(hash, key) }.reduce(&:merge)
end

#project(conditions) ⇒ Object Also known as: describe, build 



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# File 'lib/casino/projection.rb', line 23

def project(conditions)
  clone_with project: conditions
end

#results ⇒ Object 



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# File 'lib/casino/projection.rb', line 10

def results
  target.collection.aggregate(pipeline)
end

#skip(conditions) ⇒ Object Also known as: offset 



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# File 'lib/casino/projection.rb', line 45

def skip(conditions)
  clone_with skip: conditions
end

#sort(conditions) ⇒ Object Also known as: order 



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# File 'lib/casino/projection.rb', line 40

def sort(conditions)
  clone_with sort: conditions
end

#unwind(conditions) ⇒ Object Also known as: expand 



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# File 'lib/casino/projection.rb', line 29

def unwind(conditions)
  clone_with unwind: conditions
end