Class: QuerySyntax::CriteriaScope

Inherits:
Scope
  • Object
show all
Extended by:
Forwardable
Defined in:
lib/query_syntax/scope/criteria.rb

Overview

Criteria Scopes are scopes containing key:value conditions ex.: where!(a:0, b:1).where!(a:2) becomes (a=0 OR a=2) AND b=1

Instance Attribute Summary collapse

Attributes inherited from Scope

#operator

Instance Method Summary collapse

Constructor Details

#initialize(operator, conditions = {}) ⇒ CriteriaScope

Returns a new instance of CriteriaScope.



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# File 'lib/query_syntax/scope/criteria.rb', line 14

def initialize(operator, conditions={})
  super operator
  @conditions = conditions
  where!(conditions)
end

Instance Attribute Details

#conditions ⇒ Object

Returns the value of attribute conditions.



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# File 'lib/query_syntax/scope/criteria.rb', line 20

def conditions
  @conditions
end

Instance Method Details

#to_s ⇒ Object

Collapse all conditions to a string



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# File 'lib/query_syntax/scope/criteria.rb', line 37

def to_s
  value = @conditions.map do |key,values|
    query = values.map { |value| "#{key}:#{value}" }.join(" OR ")
    values.count > 1 ? "(#{query})" : query
  end.join(" AND ")

  conditions.count > 1 ? "(#{value})" : value
end

#where!(args = {}) ⇒ Object 



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# File 'lib/query_syntax/scope/criteria.rb', line 25

def where!(args={})
  args.each do |k,v|
    next if v.nil?
    @conditions[k] = [] unless conditions.key?(k)
    @conditions[k].concat(Array(v)).uniq!
  end
  self
end