module ActiveRecord::AttributeMethods::Query
Active Record Attribute Methods Query
Adds query methods for attributes that return either true or false depending on the attribute type and value.
For Boolean attributes this will return true if the value is present and return false otherwise:
class Product < ActiveRecord::Base
end
product = Product.new(archived: false)
product.archived? # => false
product.archived = true
product.archived? # => true
For Numeric attributes this will return true if the value is a non-zero number and return false otherwise:
product.inventory_count = 0
product.inventory_count? # => false
product.inventory_count = 1
product.inventory_count? # => true
For other attributes it will return true if the value is present and return false otherwise:
product.name = nil
product.name? # => false
product.name = " "
product.name? # => false
product.name = "Orange"
product.name? # => true
Public instance methods
query_attribute(attr_name)
Also aliased as:
attribute?.
Returns true or false for the attribute identified by attr_name, depending on the attribute type and value.
Source code GitHub
# File activerecord/lib/active_record/attribute_methods/query.rb, line 47
def query_attribute(attr_name)
value = self.public_send(attr_name)
query_cast_attribute(attr_name, value)
end