Class: Factory

Inherits:
Object
  • Object
show all
Defined in:
lib/factory_girl/proxy.rb,
lib/factory_girl/syntax.rb,
lib/factory_girl/aliases.rb,
lib/factory_girl/factory.rb,
lib/factory_girl/sequence.rb,
lib/factory_girl/attribute.rb,
lib/factory_girl/proxy/stub.rb,
lib/factory_girl/proxy/build.rb,
lib/factory_girl/syntax/make.rb,
lib/factory_girl/syntax/sham.rb,
lib/factory_girl/proxy/create.rb,
lib/factory_girl/syntax/generate.rb,
lib/factory_girl/attribute/static.rb,
lib/factory_girl/syntax/blueprint.rb,
lib/factory_girl/attribute/dynamic.rb,
lib/factory_girl/proxy/attributes_for.rb,
lib/factory_girl/attribute/association.rb

Defined Under Namespace

Modules: Syntax Classes: AssociationDefinitionError, Attribute, AttributeDefinitionError, Proxy, Sequence, SequenceAbuseError

Class Attribute Summary collapse

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(name, options = {}) ⇒ Factory

:nodoc:



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# File 'lib/factory_girl/factory.rb', line 65

def initialize (name, options = {}) #:nodoc:
  assert_valid_options(options)
  @factory_name = factory_name_for(name)
  @options      = options      
  @attributes   = []
end

Dynamic Method Handling

This class handles dynamic methods through the method_missing method

#method_missing(name, *args, &block) ⇒ Object

Calls add_attribute using the missing method name as the name of the attribute, so that:

Factory.define :user do |f|
  f.name 'Billy Idol'
end

and:

Factory.define :user do |f|
  f.add_attribute :name, 'Billy Idol'
end

are equivilent.



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# File 'lib/factory_girl/factory.rb', line 131

def method_missing (name, *args, &block)
  add_attribute(name, *args, &block)
end

Class Attribute Details

.aliases ⇒ Object

:nodoc:



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# File 'lib/factory_girl/aliases.rb', line 4

def aliases
  @aliases
end

.definition_file_paths ⇒ Object

An Array of strings specifying locations that should be searched for factory definitions. By default, factory_girl will attempt to require “factories,” “test/factories,” and “spec/factories.” Only the first existing file will be loaded.



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# File 'lib/factory_girl/factory.rb', line 14

def definition_file_paths
  @definition_file_paths
end

.factories ⇒ Object

:nodoc:



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# File 'lib/factory_girl/factory.rb', line 8

def factories
  @factories
end

.sequences ⇒ Object

:nodoc:



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# File 'lib/factory_girl/sequence.rb', line 24

def sequences
  @sequences
end

Instance Attribute Details

#attributes ⇒ Object (readonly)

:nodoc:



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# File 'lib/factory_girl/factory.rb', line 21

def attributes
  @attributes
end

#factory_name ⇒ Object (readonly)

:nodoc:



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# File 'lib/factory_girl/factory.rb', line 20

def factory_name
  @factory_name
end

Class Method Details

.alias(pattern, replace) ⇒ Object

Defines a new alias for attributes.

Arguments:

  • pattern: Regexp A pattern that will be matched against attributes when looking for aliases. Contents captured in the pattern can be used in the alias.

  • replace: String The alias that results from the matched pattern. Captured strings can be substituded like with String#sub.

Example:

Factory.alias /(.*)_confirmation/, '\1'

factory_girl starts with aliases for foreign keys, so that a :user association can be overridden by a :user_id parameter:

Factory.define :post do |p|
  p.association :user
end

# The user association will not be built in this example. The user_id
# will be used instead.
Factory(:post, :user_id => 1)



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# File 'lib/factory_girl/aliases.rb', line 35

def self.alias (pattern, replace)
  self.aliases << [pattern, replace]
end

.aliases_for(attribute) ⇒ Object

:nodoc:



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# File 'lib/factory_girl/aliases.rb', line 39

def self.aliases_for (attribute) #:nodoc:
  aliases.collect do |params|
    pattern, replace = *params
    if pattern.match(attribute.to_s)
      attribute.to_s.sub(pattern, replace).to_sym
    else
      nil
    end
  end.compact << attribute
end

.attributes_for(name, overrides = {}) ⇒ Object

Generates and returns a Hash of attributes from this factory. Attributes can be individually overridden by passing in a Hash of attribute => value pairs.

Arguments:

  • name: Symbol or String The name of the factory that should be used.

  • overrides: Hash Attributes to overwrite for this set.

Returns: Hash A set of attributes that can be used to build an instance of the class this factory generates.



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# File 'lib/factory_girl/factory.rb', line 200

def self.attributes_for (name, overrides = {})
  factory_by_name(name).run(Proxy::AttributesFor, overrides)
end

.build(name, overrides = {}) ⇒ Object

Generates and returns an instance from this factory. Attributes can be individually overridden by passing in a Hash of attribute => value pairs.

Arguments:

  • name: Symbol or String The name of the factory that should be used.

  • overrides: Hash Attributes to overwrite for this instance.

Returns: Object An instance of the class this factory generates, with generated attributes assigned.



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# File 'lib/factory_girl/factory.rb', line 216

def self.build (name, overrides = {})
  factory_by_name(name).run(Proxy::Build, overrides)
end

.create(name, overrides = {}) ⇒ Object

Generates, saves, and returns an instance from this factory. Attributes can be individually overridden by passing in a Hash of attribute => value pairs.

Instances are saved using the save! method, so ActiveRecord models will raise ActiveRecord::RecordInvalid exceptions for invalid attribute sets.

Arguments:

  • name: Symbol or String The name of the factory that should be used.

  • overrides: Hash Attributes to overwrite for this instance.

Returns: Object A saved instance of the class this factory generates, with generated attributes assigned.



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# File 'lib/factory_girl/factory.rb', line 236

def self.create (name, overrides = {})
  factory_by_name(name).run(Proxy::Create, overrides)
end

.default_strategy(name, overrides = {}) ⇒ Object

Executes the default strategy for the given factory. This is usually create, but it can be overridden for each factory.

Arguments:

  • name: Symbol or String The name of the factory that should be used.

  • overrides: Hash Attributes to overwrite for this instance.

Returns: Object The result of the default strategy.



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# File 'lib/factory_girl/factory.rb', line 267

def self.default_strategy (name, overrides = {})  
  self.send(factory_by_name(name).default_strategy, name, overrides)
end

.define(name, options = {}) {|instance| ... } ⇒ Object

Defines a new factory that can be used by the build strategies (create and build) to build new objects.

Arguments:

  • name: Symbol or String A unique name used to identify this factory.

  • options: Hash

Options:

  • class: Symbol, Class, or String The class that will be used when generating instances for this factory. If not specified, the class will be guessed from the factory name.

  • parent: Symbol The parent factory. If specified, the attributes from the parent factory will be copied to the current one with an ability to override them.

  • default_strategy: Symbol The strategy that will be used by the Factory shortcut method. Defaults to :create.

Yields: Factory The newly created factory.

Yields:

  • (instance) 


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# File 'lib/factory_girl/factory.rb', line 44

def self.define (name, options = {})
  instance = Factory.new(name, options)
  yield(instance)
  if parent = options.delete(:parent)
    instance.inherit_from(Factory.factory_by_name(parent))
  end    
  self.factories[instance.factory_name] = instance
end

.find_definitions ⇒ Object

:nodoc:



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# File 'lib/factory_girl/factory.rb', line 271

def self.find_definitions #:nodoc:
  definition_file_paths.each do |path|
    require("#{path}.rb") if File.exists?("#{path}.rb")

    if File.directory? path
      Dir[File.join(path, '*.rb')].each do |file|
        require file
      end
    end
  end
end

.next(sequence) ⇒ Object

Generates and returns the next value in a sequence.

Arguments:

name: (Symbol)
  The name of the sequence that a value should be generated for.

Returns:

The next value in the sequence. (Object)



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# File 'lib/factory_girl/sequence.rb', line 55

def self.next (sequence)
  unless self.sequences.key?(sequence)
    raise "No such sequence: #{sequence}"
  end

  self.sequences[sequence].next
end

.sequence(name, &block) ⇒ Object

Defines a new sequence that can be used to generate unique values in a specific format.

Arguments:

name: (Symbol)
  A unique name for this sequence. This name will be referenced when
  calling next to generate new values from this sequence.
block: (Proc)
  The code to generate each value in the sequence. This block will be
  called with a unique number each time a value in the sequence is to be
  generated. The block should return the generated value for the
  sequence.

Example:

Factory.sequence(:email) {|n| "somebody_#{n}@example.com" }



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# File 'lib/factory_girl/sequence.rb', line 43

def self.sequence (name, &block)
  self.sequences[name] = Sequence.new(&block)
end

.stub(name, overrides = {}) ⇒ Object

Generates and returns an object with all attributes from this factory stubbed out. Attributes can be individually overridden by passing in a Hash of attribute => value pairs.

Arguments:

  • name: Symbol or String The name of the factory that should be used.

  • overrides: Hash Attributes to overwrite for this instance.

Returns: Object An object with generated attributes stubbed out.



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# File 'lib/factory_girl/factory.rb', line 252

def self.stub (name, overrides = {})
  factory_by_name(name).run(Proxy::Stub, overrides)
end

Instance Method Details

#add_attribute(name, value = nil, &block) ⇒ Object

Adds an attribute that should be assigned on generated instances for this factory.

This method should be called with either a value or block, but not both. If called with a block, the attribute will be generated “lazily,” whenever an instance is generated. Lazy attribute blocks will not be called if that attribute is overriden for a specific instance.

When defining lazy attributes, an instance of Factory::Proxy will be yielded, allowing associations to be built using the correct build strategy.

Arguments:

  • name: Symbol or String The name of this attribute. This will be assigned using :“#name=” for generated instances.

  • value: Object If no block is given, this value will be used for this attribute.



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# File 'lib/factory_girl/factory.rb', line 99

def add_attribute (name, value = nil, &block)
  if block_given?
    if value
      raise AttributeDefinitionError, "Both value and block given"
    else
      attribute = Attribute::Dynamic.new(name, block)
    end
  else
    attribute = Attribute::Static.new(name, value)
  end

  if attribute_defined?(attribute.name)
    raise AttributeDefinitionError, "Attribute already defined: #{name}"
  end

  @attributes << attribute
end

#association(name, options = {}) ⇒ Object

Adds an attribute that builds an association. The associated instance will be built using the same build strategy as the parent instance.

Example:

Factory.define :user do |f|
  f.name 'Joey'
end

Factory.define :post do |f|
  f.association :author, :factory => :user
end

Arguments:

  • name: Symbol The name of this attribute.

  • options: Hash

Options:

  • factory: Symbol or String

    The name of the factory to use when building the associated instance.
If no name is given, the name of the attribute is assumed to be the
name of the factory. For example, a "user" association will by
default use the "user" factory.



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# File 'lib/factory_girl/factory.rb', line 158

def association (name, options = {})
  factory_name = options.delete(:factory) || name
  if factory_name_for(factory_name) == self.factory_name
    raise AssociationDefinitionError, "Self-referencing association '#{name}' in factory '#{self.factory_name}'"
  end
  @attributes << Attribute::Association.new(name, factory_name, options)
end

#build_class ⇒ Object

:nodoc:



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# File 'lib/factory_girl/factory.rb', line 57

def build_class #:nodoc:
  @build_class ||= class_for(class_name)
end

#class_name ⇒ Object

:nodoc:



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# File 'lib/factory_girl/factory.rb', line 53

def class_name #:nodoc:
  @options[:class] || factory_name
end

#default_strategy ⇒ Object

:nodoc:



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# File 'lib/factory_girl/factory.rb', line 61

def default_strategy #:nodoc:
  @options[:default_strategy] || :create
end

#inherit_from(parent) ⇒ Object

:nodoc:



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# File 'lib/factory_girl/factory.rb', line 72

def inherit_from(parent) #:nodoc:
  @options[:class] ||= parent.class_name
  parent.attributes.each do |attribute|
    unless attribute_defined?(attribute.name)
      @attributes << attribute.clone
    end
  end
end

#run(proxy_class, overrides) ⇒ Object

:nodoc:



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# File 'lib/factory_girl/factory.rb', line 283

def run (proxy_class, overrides) #:nodoc:
  proxy = proxy_class.new(build_class)
  overrides = symbolize_keys(overrides)
  overrides.each {|attr, val| proxy.set(attr, val) }
  passed_keys = overrides.keys.collect {|k| Factory.aliases_for(k) }.flatten
  @attributes.each do |attribute|
    unless passed_keys.include?(attribute.name)
      attribute.add_to(proxy)
    end
  end
  proxy.result
end

#sequence(name, &block) ⇒ Object

Adds an attribute that will have unique values generated by a sequence with a specified format.

The result of:

Factory.define :user do |f|
 f.sequence(:email) { |n| "person#{n}@example.com" }
end

Is equal to:

Factory.sequence(:email) { |n| "person#{n}@example.com" }

Factory.define :user do |f|
 f.email { Factory.next(:email) }
end

Except that no globally available sequence will be defined.



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# File 'lib/factory_girl/factory.rb', line 182

def sequence (name, &block)
  s = Sequence.new(&block)
  add_attribute(name) { s.next }
end