Class: Lore::Select_Query

Inherits:
Array
  • Object
show all
Defined in:
lib/lore/query.rb

Overview

Proxy class for Select queries. 

Model.select { |x| ... }    --> Select.new(Model, clause_parser)

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(model, what = nil, polymorphic = false, &block) ⇒ Select_Query

Returns a new instance of Select_Query.



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# File 'lib/lore/query.rb', line 12

def initialize(model, what=nil, polymorphic=false, &block)
  @model         = model
  @strategy      = model.__select_strategy__
  @what          = what
  @polymorphic   = polymorphic
  @clause_parser = yield(Clause_Parser.new(@model))
end

Dynamic Method Handling

This class handles dynamic methods through the method_missing method

#method_missing(meth, *args) ⇒ Object

Any undefined method is interpreted as kicker call.



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# File 'lib/lore/query.rb', line 56

def method_missing(meth, *args)
  perform.__send__(meth, *args)
end

Instance Attribute Details

#clause_parser ⇒ Object (readonly)

Returns the value of attribute clause_parser.



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# File 'lib/lore/query.rb', line 10

def clause_parser
  @clause_parser
end

#model ⇒ Object (readonly)

Returns the value of attribute model.



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# File 'lib/lore/query.rb', line 10

def model
  @model
end

Instance Method Details

#+(other) ⇒ Object 



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# File 'lib/lore/query.rb', line 50

def +(other)
  perform + other.to_a
end

#each(&block) ⇒ Object 



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# File 'lib/lore/query.rb', line 38

def each(&block)
  perform.each(&block)
end

#each_with_index(&block) ⇒ Object 



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# File 'lib/lore/query.rb', line 41

def each_with_index(&block)
  perform.each_with_index(&block)
end

#first ⇒ Object 



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# File 'lib/lore/query.rb', line 32

def first
  perform.first
end

#last ⇒ Object 



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# File 'lib/lore/query.rb', line 35

def last
  perform.last
end

#perform ⇒ Object Also known as: to_a, exec, result 



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# File 'lib/lore/query.rb', line 25

def perform
  @strategy.select_cached(@what, @clause_parser, @polymorphic)
end

#to_sql ⇒ Object Also known as: sql 



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# File 'lib/lore/query.rb', line 20

def to_sql
  @strategy.select_query(@what, @clause_parser, @polymorphic)[:query]
end

#union(other) ⇒ Object 



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# File 'lib/lore/query.rb', line 45

def union(other)
  @clause_parser.union(other)
  return self
end