Class: Sinclair::EqualsChecker::Reader Private

Inherits:
Object
  • Object
show all
Defined in:
lib/sinclair/equals_checker/reader.rb

Overview

This class is part of a private API. You should avoid using this class if possible, as it may be removed or be changed in the future.

Class capable of reading an attribute from models

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(attribute) ⇒ Reader

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future.

Returns a new instance of Reader.

Parameters:

  • attribute (Symbol) —

    name of the attribute (method or variable) to be accessed in the models



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# File 'lib/sinclair/equals_checker/reader.rb', line 29

def initialize(attribute)
  @attribute = attribute
end

Class Method Details

.attributes_match?(attribute, model, other) ⇒ TrueClass, FalseClass

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future.

Checks if two attributes from 2 object match

Parameters:

  • attribute (Symbol) —

    attribute name

  • model (Object) —

    object to be compared with other

  • other (Object) —

    object to be compared with model

Returns:

  • (TrueClass, FalseClass)

See Also:



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# File 'lib/sinclair/equals_checker/reader.rb', line 21

def self.attributes_match?(attribute, model, other)
  reader = new(attribute)

  reader.read_from(model) == reader.read_from(other)
end

Instance Method Details

#read_from(model) ⇒ Object

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future.

Reads the attribute from the model

When attribute is a method name, calls that method on the model

When attribute is an instance variable name, that is read directly from the model

Parameters:

  • model (Object) —

    the model to be read

Returns:



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# File 'lib/sinclair/equals_checker/reader.rb', line 42

def read_from(model)
  return model.send(attribute) unless attribute.to_s.match?(/^@.*/)

  model.instance_variable_get(attribute)
end