Class: Pluckr::Schema::Scope

Inherits:
Object
  • Object
show all
Defined in:
lib/pluckr/schema/scope.rb

Overview

A level of the AST: the nodes selected for one model (the root source, or one nested singular association).

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(model, nodes) ⇒ Scope

Returns a new instance of Scope.



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# File 'lib/pluckr/schema/scope.rb', line 10

def initialize(model, nodes)
  @model = model
  @nodes = nodes.freeze
  freeze
end

Instance Attribute Details

#model ⇒ Object (readonly)

Returns the value of attribute model.



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# File 'lib/pluckr/schema/scope.rb', line 8

def model
  @model
end

#nodes ⇒ Object (readonly)

Returns the value of attribute nodes.



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# File 'lib/pluckr/schema/scope.rb', line 8

def nodes
  @nodes
end

Instance Method Details

#fields ⇒ Object 



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# File 'lib/pluckr/schema/scope.rb', line 16

def fields
  nodes.grep(Field)
end

#ones ⇒ Object 



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# File 'lib/pluckr/schema/scope.rb', line 20

def ones
  nodes.grep(One)
end

#outputs ⇒ Object 



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# File 'lib/pluckr/schema/scope.rb', line 24

def outputs
  nodes.map(&:output)
end

#rooted? ⇒ Boolean

True when anything here needs a root record to hang off.

Returns:

  • (Boolean) 


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# File 'lib/pluckr/schema/scope.rb', line 29

def rooted?
  nodes.any? { |node| !(node.is_a?(Aggregate) && node.independent?) }
end