Class: Ransack::Predicate

Inherits:
Object
  • Object
show all
Defined in:
lib/ransack/predicate.rb

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(opts = {}) ⇒ Predicate

Returns a new instance of Predicate.



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# File 'lib/ransack/predicate.rb', line 43

def initialize(opts = {})
  @name = opts[:name]
  @arel_predicate = opts[:arel_predicate]
  @type = opts[:type]
  @formatter = opts[:formatter]
  @validator = opts[:validator] || lambda {
    |v| v.respond_to?(:empty?) ? !v.empty? : !v.nil?
    }
  @compound = opts[:compound]
  @wants_array = opts[:wants_array] == true || @compound || ['in', 'not_in'].
    include?(@arel_predicate)
end

Instance Attribute Details

#arel_predicate ⇒ Object (readonly)

Returns the value of attribute arel_predicate.



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# File 'lib/ransack/predicate.rb', line 3

def arel_predicate
  @arel_predicate
end

#compound ⇒ Object (readonly)

Returns the value of attribute compound.



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# File 'lib/ransack/predicate.rb', line 3

def compound
  @compound
end

#formatter ⇒ Object (readonly)

Returns the value of attribute formatter.



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# File 'lib/ransack/predicate.rb', line 3

def formatter
  @formatter
end

#name ⇒ Object (readonly)

Returns the value of attribute name.



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# File 'lib/ransack/predicate.rb', line 3

def name
  @name
end

#type ⇒ Object (readonly)

Returns the value of attribute type.



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# File 'lib/ransack/predicate.rb', line 3

def type
  @type
end

#validator ⇒ Object (readonly)

Returns the value of attribute validator.



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# File 'lib/ransack/predicate.rb', line 3

def validator
  @validator
end

#wants_array ⇒ Object (readonly)

Returns the value of attribute wants_array.



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# File 'lib/ransack/predicate.rb', line 3

def wants_array
  @wants_array
end

Class Method Details

.detect_and_strip_from_string!(str) ⇒ Object 



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# File 'lib/ransack/predicate.rb', line 20

def detect_and_strip_from_string!(str)
  if p = detect_from_string(str)
    str.sub! /_#{p}$/, ''
    p
  end
end

.detect_from_string(str) ⇒ Object 



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# File 'lib/ransack/predicate.rb', line 27

def detect_from_string(str)
  names_by_decreasing_length.detect { |p| str.end_with?("_#{p}") }
end

.for_attribute_name(attribute_name) ⇒ Object 



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# File 'lib/ransack/predicate.rb', line 37

def for_attribute_name(attribute_name)
  self.named(detect_from_string(attribute_name.to_s))
end

.name_from_attribute_name(attribute_name) ⇒ Object 



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# File 'lib/ransack/predicate.rb', line 31

def name_from_attribute_name(attribute_name)
  names_by_decreasing_length.detect {
    |p| attribute_name.to_s.match(/_#{p}$/)
  }
end

.named(name) ⇒ Object 



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# File 'lib/ransack/predicate.rb', line 16

def named(name)
  Ransack.predicates[name.to_s]
end

.names ⇒ Object 



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# File 'lib/ransack/predicate.rb', line 8

def names
  Ransack.predicates.keys
end

.names_by_decreasing_length ⇒ Object 



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# File 'lib/ransack/predicate.rb', line 12

def names_by_decreasing_length
  names.sort { |a,b| b.length <=> a.length }
end

Instance Method Details

#eql?(other) ⇒ Boolean Also known as: ==

Returns:

  • (Boolean) 


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# File 'lib/ransack/predicate.rb', line 56

def eql?(other)
  self.class == other.class &&
  self.name == other.name
end

#format(val) ⇒ Object 



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# File 'lib/ransack/predicate.rb', line 66

def format(val)
  if formatter
    formatter.call(val)
  else
    val
  end
end

#hash ⇒ Object 



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# File 'lib/ransack/predicate.rb', line 62

def hash
  name.hash
end

#validate(vals, type = @type) ⇒ Object 



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# File 'lib/ransack/predicate.rb', line 74

def validate(vals, type = @type)
  vals.select { |v| validator.call(type ? v.cast(type) : v.value) }.any?
end