Class: AnonymousActiveRecord::Generator

Inherits:
Object
  • Object
show all
Defined in:
lib/anonymous_active_record/generator.rb

Overview

Generator defines a pseudo anonymous class in a particular namespace of your choosing.

Constant Summary collapse

DEFAULT_NAME = 
"anons"

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(table_name, klass_namespaces = [], klass_basename = nil, parent_klass = "ActiveRecord::Base") ⇒ Generator

Returns a new instance of Generator.



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# File 'lib/anonymous_active_record/generator.rb', line 21

def initialize(table_name, klass_namespaces = [], klass_basename = nil, parent_klass = "ActiveRecord::Base")
  @klass_namespaces = Array(klass_namespaces).map(&:to_s).map { |x| x.gsub(/[^a-z0-9]+/i, "_") }
  klass_context = [
    (klass_basename || DEFAULT_NAME).gsub(/[^a-z0-9]+/i, "_").capitalize,
    SecureRandom.uuid.gsub(/[^a-z0-9]+/i, "_"),
  ].join("_")
  @table_name = (table_name || klass_context).downcase.to_s
  # String#capitalize is Ruby >= 2.4, https://stackoverflow.com/a/3725154/213191
  @klass_name = (klass_namespaces << klass_context).join("::")
  @parent_klass = parent_klass
end

Instance Attribute Details

#klass_name ⇒ Object (readonly)

Returns the value of attribute klass_name.



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# File 'lib/anonymous_active_record/generator.rb', line 19

def klass_name
  @klass_name
end

#klass_namespaces ⇒ Object (readonly)

Returns the value of attribute klass_namespaces.



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# File 'lib/anonymous_active_record/generator.rb', line 19

def klass_namespaces
  @klass_namespaces
end

#parent_klass ⇒ Object (readonly)

Returns the value of attribute parent_klass.



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# File 'lib/anonymous_active_record/generator.rb', line 19

def parent_klass
  @parent_klass
end

#table_name ⇒ Object (readonly)

Returns the value of attribute table_name.



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# File 'lib/anonymous_active_record/generator.rb', line 19

def table_name
  @table_name
end

Instance Method Details

#generate(&block) ⇒ Object 



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# File 'lib/anonymous_active_record/generator.rb', line 33

def generate(&block)
  # Many moons ago, ActiveRecord allowed anonymous classes to be created like:
  #   Class.new(ActiveRecord::Base)
  # which was useful for specs, and other use cases.  But it is now explicitly not supported, see
  #   https://github.com/rails/rails/issues/8934
  eval("class ::#{klass_name} < #{parent_klass}; end")
  klass = Kernel.const_get(klass_name, true)
  klass.class_eval(&block) if block
  klass.table_name = table_name
  klass
end