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adding rdoc to method properties_with_values

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This commit is contained in:
Lucas Renan 2010-12-22 23:09:00 -02:00
commit 92a10dbfc9
30 changed files with 764 additions and 506 deletions
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132
lib/couchrest/model/attributes.rb
View file

@ -1,132 +0,0 @@
module CouchRest
module Model
ReadOnlyPropertyError = Class.new(StandardError)
# Attributes Suffixes provide methods from ActiveModel
# to hook into. See methods such as #attribute= and
# #attribute? for their implementation
AttributeMethodSuffixes = ['', '=', '?']
module Attributes
extend ActiveSupport::Concern
included do
include ActiveModel::AttributeMethods
attribute_method_suffix *AttributeMethodSuffixes
end
module ClassMethods
def attributes
properties.map {|prop| prop.name}
end
end
def initialize(*args)
self.class.attribute_method_suffix *AttributeMethodSuffixes
super
end
def attributes
self.class.attributes
end
## Reads the attribute value.
# Assuming you have a property :title this would be called
# by `model_instance.title`
def attribute(name)
read_attribute(name)
end
## Sets the attribute value.
# Assuming you have a property :title this would be called
# by `model_instance.title = 'hello'`
def attribute=(name, value)
raise ReadOnlyPropertyError, 'read only property' if find_property!(name).read_only
write_attribute(name, value)
end
## Tests for both presence and truthiness of the attribute.
# Assuming you have a property :title # this would be called
# by `model_instance.title?`
def attribute?(name)
value = read_attribute(name)
!(value.nil? || value == false)
end
## Support for handling attributes
#
# This would be better in the properties file, but due to scoping issues
# this is not yet possible.
def prepare_all_attributes(doc = {}, options = {})
apply_all_property_defaults
if options[:directly_set_attributes]
directly_set_read_only_attributes(doc)
else
remove_protected_attributes(doc)
end
directly_set_attributes(doc) unless doc.nil?
end
# Takes a hash as argument, and applies the values by using writer methods
# for each key. It doesn't save the document at the end. Raises a NoMethodError if the corresponding methods are
# missing. In case of error, no attributes are changed.
def update_attributes_without_saving(hash)
# Remove any protected and update all the rest. Any attributes
# which do not have a property will simply be ignored.
attrs = remove_protected_attributes(hash)
directly_set_attributes(attrs)
end
alias :attributes= :update_attributes_without_saving
def read_attribute(property)
prop = find_property!(property)
self[prop.to_s]
end
def write_attribute(property, value)
prop = find_property!(property)
self[prop.to_s] = prop.cast(self, value)
end
private
def read_only_attributes
properties.select { |prop| prop.read_only }.map { |prop| prop.name }
end
def directly_set_attributes(hash)
r_o_a = read_only_attributes
hash.each do |attribute_name, attribute_value|
next if r_o_a.include? attribute_name
if self.respond_to?("#{attribute_name}=")
self.send("#{attribute_name}=", hash.delete(attribute_name))
end
end
end
def directly_set_read_only_attributes(hash)
r_o_a = read_only_attributes
property_list = attributes
hash.each do |attribute_name, attribute_value|
next unless r_o_a.include? attribute_name
if property_list.include?(attribute_name)
write_attribute(attribute_name, hash.delete(attribute_name))
end
end
end
def set_attributes(hash)
attrs = remove_protected_attributes(hash)
directly_set_attributes(attrs)
end
def check_properties_exist(attrs)
property_list = attributes
attrs.each do |attribute_name, attribute_value|
raise NoMethodError, "Property #{attribute_name} not created" unless respond_to?("#{attribute_name}=") or property_list.include?(attribute_name)
end
end
end
end
end

37
lib/couchrest/model/base.rb
View file

@ -4,24 +4,23 @@ module CouchRest
extend ActiveModel::Naming
include CouchRest::Model::Configuration
include CouchRest::Model::Persistence
include CouchRest::Model::Callbacks
include CouchRest::Model::DocumentQueries
include CouchRest::Model::DocumentQueries
include CouchRest::Model::Views
include CouchRest::Model::DesignDoc
include CouchRest::Model::ExtendedAttachments
include CouchRest::Model::ClassProxy
include CouchRest::Model::Collection
include CouchRest::Model::AttributeProtection
include CouchRest::Model::Attributes
include CouchRest::Model::PropertyProtection
include CouchRest::Model::Associations
include CouchRest::Model::Validations
include CouchRest::Model::Dirty
def self.subclasses
@subclasses ||= []
end
def self.inherited(subklass)
super
subklass.send(:include, CouchRest::Model::Properties)
@ -35,7 +34,7 @@ module CouchRest
EOS
subclasses << subklass
end
# Accessors
attr_accessor :casted_by
@ -44,19 +43,19 @@ module CouchRest
# using the provided document hash.
#
# Options supported:
#
#
# * :directly_set_attributes: true when data comes directly from database
#
def initialize(doc = {}, options = {})
prepare_all_attributes(doc, options)
doc = prepare_all_attributes(doc, options)
super(doc)
unless self['_id'] && self['_rev']
self['couchrest-type'] = self.class.to_s
self[self.model_type_key] = self.class.to_s
end
after_initialize if respond_to?(:after_initialize)
end
# Temp solution to make the view_by methods available
def self.method_missing(m, *args, &block)
if has_view?(m)
@ -70,9 +69,9 @@ module CouchRest
end
super
end
### instance methods
# Gets a reference to the actual document in the DB
# Calls up to the next document if there is one,
# Otherwise we're at the top and we return self
@ -80,14 +79,14 @@ module CouchRest
return self if base_doc?
@casted_by.base_doc
end
# Checks if we're the top document
def base_doc?
!@casted_by
end
## Compatibility with ActiveSupport and older frameworks
# Hack so that CouchRest::Document, which descends from Hash,
# doesn't appear to Rails routing as a Hash of options
def is_a?(klass)
@ -99,14 +98,14 @@ module CouchRest
def persisted?
!new?
end
def to_key
new? ? nil : [id]
new? ? nil : [id]
end
alias :to_param :id
alias :new_record? :new?
alias :new_document? :new?
end
end
end
end

20
lib/couchrest/model/casted_model.rb
View file

@ -1,39 +1,39 @@
module CouchRest::Model
module CastedModel
extend ActiveSupport::Concern
included do
include CouchRest::Model::AttributeProtection
include CouchRest::Model::Attributes
include CouchRest::Model::Configuration
include CouchRest::Model::Callbacks
include CouchRest::Model::Properties
include CouchRest::Model::PropertyProtection
include CouchRest::Model::Associations
include CouchRest::Model::Validations
attr_accessor :casted_by
end
def initialize(keys = {})
raise StandardError unless self.is_a? Hash
prepare_all_attributes(keys)
super()
end
def []= key, value
super(key.to_s, value)
end
def [] key
super(key.to_s)
end
# Gets a reference to the top level extended
# document that a model is saved inside of
def base_doc
return nil unless @casted_by
@casted_by.base_doc
end
# False if the casted model has already
# been saved in the containing document
def new?
@ -53,12 +53,12 @@ module CouchRest::Model
end
alias :to_key :id
alias :to_param :id
# Sets the attributes from a hash
def update_attributes_without_saving(hash)
hash.each do |k, v|
raise NoMethodError, "#{k}= method not available, use property :#{k}" unless self.respond_to?("#{k}=")
end
end
hash.each do |k, v|
self.send("#{k}=",v)
end

3
lib/couchrest/model/collection.rb
View file

@ -82,6 +82,7 @@ module CouchRest
design_doc['views'][view_name.to_s] &&
design_doc['views'][view_name.to_s]["couchrest-defaults"]) || {}
view_options = default_view_options.merge(options)
view_options.delete(:database)
[design_doc, view_name, view_options]
end
@ -94,6 +95,8 @@ module CouchRest
raise ArgumentError, 'search_name is required' if search_name.nil?
search_options = options.clone
search_options.delete(:database)
[design_doc, search_name, search_options]
end

51
lib/couchrest/model/configuration.rb Normal file
View file

@ -0,0 +1,51 @@
module CouchRest
# CouchRest Model Configuration support, stolen from Carrierwave by jnicklas
# http://github.com/jnicklas/carrierwave/blob/master/lib/carrierwave/uploader/configuration.rb
module Model
module Configuration
extend ActiveSupport::Concern
included do
add_config :model_type_key
add_config :mass_assign_any_attribute
configure do |config|
config.model_type_key = 'couchrest-type' # 'model'?
config.mass_assign_any_attribute = false
end
end
module ClassMethods
def add_config(name)
class_eval <<-RUBY, __FILE__, __LINE__ + 1
def self.#{name}(value=nil)
@#{name} = value if value
return @#{name} if self.object_id == #{self.object_id} || defined?(@#{name})
name = superclass.#{name}
return nil if name.nil? && !instance_variable_defined?("@#{name}")
@#{name} = name && !name.is_a?(Module) && !name.is_a?(Symbol) && !name.is_a?(Numeric) && !name.is_a?(TrueClass) && !name.is_a?(FalseClass) ? name.dup : name
end
def self.#{name}=(value)
@#{name} = value
end
def #{name}
self.class.#{name}
end
RUBY
end
def configure
yield self
end
end
end
end
end

2
lib/couchrest/model/design_doc.rb
View file

@ -31,7 +31,7 @@ module CouchRest
"views" => {
'all' => {
'map' => "function(doc) {
if (doc['couchrest-type'] == '#{self.to_s}') {
if (doc['#{self.model_type_key}'] == '#{self.to_s}') {
emit(doc['_id'],1);
}
}"

44
lib/couchrest/model/dirty.rb
View file

@ -1,44 +0,0 @@
# encoding: utf-8
require 'active_model/dirty'
module CouchRest #:nodoc:
module Model #:nodoc:
# Dirty Tracking support via ActiveModel
# mixin methods include:
# #changed?, #changed, #changes, #previous_changes
# #<attribute>_changed?, #<attribute>_change,
# #reset_<attribute>!, #<attribute>_will_change!,
# and #<attribute>_was
#
# Please see the specs or the documentation of
# ActiveModel::Dirty for more information
module Dirty
extend ActiveSupport::Concern
included do
include ActiveModel::Dirty
after_save :clear_changed_attributes
end
def initialize(*args)
super
@changed_attributes.clear if @changed_attributes
end
def write_attribute(name, value)
meth = :"#{name}_will_change!"
__send__ meth if respond_to? meth
super
end
private
def clear_changed_attributes
@previously_changed = changes
@changed_attributes.clear
true
end
end
end
end

6
lib/couchrest/model/document_queries.rb
View file

@ -8,21 +8,21 @@ module CouchRest
module ClassMethods
# Load all documents that have the "couchrest-type" field equal to the
# Load all documents that have the model_type_key's field equal to the
# name of the current class. Take the standard set of
# CouchRest::Database#view options.
def all(opts = {}, &block)
view(:all, opts, &block)
end
# Returns the number of documents that have the "couchrest-type" field
# Returns the number of documents that have the model_type_key's field
# equal to the name of the current class. Takes the standard set of
# CouchRest::Database#view options
def count(opts = {}, &block)
all({:raw => true, :limit => 0}.merge(opts), &block)['total_rows']
end
# Load the first document that have the "couchrest-type" field equal to
# Load the first document that have the model_type_key's field equal to
# the name of the current class.
#
# ==== Returns

2
lib/couchrest/model/persistence.rb
View file

@ -97,7 +97,7 @@ module CouchRest
# ==== Returns
# a document instance
def create_from_database(doc = {})
base = (doc['couchrest-type'].blank? || doc['couchrest-type'] == self.to_s) ? self : doc['couchrest-type'].constantize
base = (doc[model_type_key].blank? || doc[model_type_key] == self.to_s) ? self : doc[model_type_key].constantize
base.new(doc, :directly_set_attributes => true)
end

136
lib/couchrest/model/properties.rb
View file

@ -1,18 +1,13 @@
# encoding: utf-8
require 'set'
module CouchRest
module Model
module Properties
extend ActiveSupport::Concern
class IncludeError < StandardError; end
def self.included(base)
base.class_eval <<-EOS, __FILE__, __LINE__ + 1
extlib_inheritable_accessor(:properties) unless self.respond_to?(:properties)
self.properties ||= []
EOS
base.extend(ClassMethods)
raise CouchRest::Mixins::Properties::IncludeError, "You can only mixin Properties in a class responding to [] and []=, if you tried to mixin CastedModel, make sure your class inherits from Hash or responds to the proper methods" unless (base.new.respond_to?(:[]) && base.new.respond_to?(:[]=))
included do
extlib_inheritable_accessor(:properties) unless self.respond_to?(:properties)
self.properties ||= []
raise "You can only mixin Properties in a class responding to [] and []=, if you tried to mixin CastedModel, make sure your class inherits from Hash or responds to the proper methods" unless (method_defined?(:[]) && method_defined?(:[]=))
end
# Returns the Class properties
@ -23,12 +18,45 @@ module CouchRest
self.class.properties
end
# Returns the Class properties with their values
#
# ==== Returns
# Array:: the list of properties with their values
def properties_with_values
props = {}
properties.each { |property| props[property.name] = read_attribute(property.name) }
props
end
# Read the casted value of an attribute defined with a property.
#
# ==== Returns
# Object:: the casted attibutes value.
def read_attribute(property)
self[find_property!(property).to_s]
end
# Store a casted value in the current instance of an attribute defined
# with a property.
def write_attribute(property, value)
prop = find_property!(property)
self[prop.to_s] = prop.is_a?(String) ? value : prop.cast(self, value)
end
# Takes a hash as argument, and applies the values by using writer methods
# for each key. It doesn't save the document at the end. Raises a NoMethodError if the corresponding methods are
# missing. In case of error, no attributes are changed.
def update_attributes_without_saving(hash)
# Remove any protected and update all the rest. Any attributes
# which do not have a property will simply be ignored.
attrs = remove_protected_attributes(hash)
directly_set_attributes(attrs)
end
alias :attributes= :update_attributes_without_saving
private
# The following methods should be accessable by the Model::Base Class, but not by anything else!
def apply_all_property_defaults
return if self.respond_to?(:new?) && (new? == false)
# TODO: cache the default object
@ -37,13 +65,54 @@ module CouchRest
end
end
private
def prepare_all_attributes(doc = {}, options = {})
apply_all_property_defaults
if options[:directly_set_attributes]
directly_set_read_only_attributes(doc)
else
doc = remove_protected_attributes(doc)
end
directly_set_attributes(doc) unless doc.nil?
end
def find_property!(property)
prop = property.is_a?(Property) ? property : self.class.properties.detect {|p| p.to_s == property.to_s}
raise ArgumentError, "Missing property definition for #{property.to_s}" unless prop
raise ArgumentError, "Missing property definition for #{property.to_s}" if prop.nil?
prop
end
# Set all the attributes and return a hash with the attributes
# that have not been accepted.
def directly_set_attributes(hash)
hash.reject do |attribute_name, attribute_value|
if self.respond_to?("#{attribute_name}=")
self.send("#{attribute_name}=", attribute_value)
true
elsif mass_assign_any_attribute # config option
self[attribute_name] = attribute_value
true
else
false
end
end
end
def directly_set_read_only_attributes(hash)
property_list = self.properties.map{|p| p.name}
hash.each do |attribute_name, attribute_value|
next if self.respond_to?("#{attribute_name}=")
if property_list.include?(attribute_name)
write_attribute(attribute_name, hash.delete(attribute_name))
end
end
end
def set_attributes(hash)
attrs = remove_protected_attributes(hash)
directly_set_attributes(attrs)
end
module ClassMethods
def property(name, *options, &block)
@ -91,7 +160,8 @@ module CouchRest
type = [type] # inject as an array
end
property = Property.new(name, type, options)
create_property_alias(property) if property.alias
create_property_getter(property)
create_property_setter(property) unless property.read_only == true
if property.type_class.respond_to?(:validates_casted_model)
validates_casted_model property.name
end
@ -99,15 +169,49 @@ module CouchRest
property
end
def create_property_alias(property)
# defines the getter for the property (and optional aliases)
def create_property_getter(property)
# meth = property.name
class_eval <<-EOS, __FILE__, __LINE__ + 1
def #{property.alias.to_s}
#{property.name}
def #{property.name}
read_attribute('#{property.name}')
end
EOS
if ['boolean', TrueClass.to_s.downcase].include?(property.type.to_s.downcase)
class_eval <<-EOS, __FILE__, __LINE__
def #{property.name}?
value = read_attribute('#{property.name}')
!(value.nil? || value == false)
end
EOS
end
if property.alias
class_eval <<-EOS, __FILE__, __LINE__ + 1
alias #{property.alias.to_sym} #{property.name.to_sym}
EOS
end
end
# defines the setter for the property (and optional aliases)
def create_property_setter(property)
property_name = property.name
class_eval <<-EOS
def #{property_name}=(value)
write_attribute('#{property_name}', value)
end
EOS
if property.alias
class_eval <<-EOS
alias #{property.alias.to_sym}= #{property_name.to_sym}=
EOS
end
end
end # module ClassMethods
end
end
end

3
lib/couchrest/model/property.rb
View file

@ -58,7 +58,8 @@ module CouchRest::Model
if default.class == Proc
default.call
else
Marshal.load(Marshal.dump(default))
# Marshal.load(Marshal.dump(default)) # Removed as there are no failing tests and caused mutex errors
default
end
end

40
lib/couchrest/model/attribute_protection.rb → lib/couchrest/model/property_protection.rb
View file

@ -1,7 +1,9 @@
module CouchRest
module Model
module AttributeProtection
# Attribute protection from mass assignment to CouchRest::Model properties
module PropertyProtection
extend ActiveSupport::Concern
# Property protection from mass assignment to CouchRest::Model properties
#
# Protected methods will be removed from
# * new
@ -20,7 +22,7 @@ module CouchRest
#
# 3) Mix and match, and assume all unspecified properties are protected.
# property :name, :accessible => true
# property :admin, :protected => true
# property :admin, :protected => true # ignored
# property :phone # this will be automatically protected
#
# Note: the timestamps! method protectes the created_at and updated_at properties
@ -32,11 +34,16 @@ module CouchRest
module ClassMethods
def accessible_properties
properties.select { |prop| prop.options[:accessible] }
props = properties.select { |prop| prop.options[:accessible] }
if props.empty?
props = properties.select { |prop| !prop.options[:protected] }
end
props
end
def protected_properties
properties.select { |prop| prop.options[:protected] }
accessibles = accessible_properties
properties.reject { |prop| accessibles.include?(prop) }
end
end
@ -48,28 +55,17 @@ module CouchRest
self.class.protected_properties
end
# Return a new copy of the attributes hash with protected attributes
# removed.
def remove_protected_attributes(attributes)
protected_names = properties_to_remove_from_mass_assignment.map { |prop| prop.name }
return attributes if protected_names.empty?
protected_names = protected_properties.map { |prop| prop.name }
return attributes if protected_names.empty? or attributes.nil?
attributes.reject! do |property_name, property_value|
attributes.reject do |property_name, property_value|
protected_names.include?(property_name.to_s)
end if attributes
attributes || {}
end
private
def properties_to_remove_from_mass_assignment
to_remove = protected_properties
unless accessible_properties.empty?
to_remove += properties.reject { |prop| prop.options[:accessible] }
end
to_remove
end
end
end
end

2
lib/couchrest/model/typecast.rb
View file

@ -79,7 +79,7 @@ module CouchRest
# Match numeric string
def typecast_to_numeric(value, method)
if value.respond_to?(:to_str)
if value.to_str =~ /\A(-?(?:0|[1-9]\d*)(?:\.\d+)?|(?:\.\d+))\z/
if value.gsub(/,/, '.').gsub(/\.(?!\d*\Z)/, '').to_str =~ /\A(-?(?:0|[1-9]\d*)(?:\.\d+)?|(?:\.\d+))\z/
$1.send(method)
else
value

190
lib/couchrest/model/view.rb Normal file
View file

@ -0,0 +1,190 @@
#### NOTE Work in progress! Not yet used!
module CouchRest
module Model
# A proxy class that allows view queries to be created using
# chained method calls. After each call a new instance of the method
# is created based on the original in a similar fashion to ruby's sequel
# library, or Rails 3's Arel.
#
# CouchDB views have inherent limitations, so joins and filters as used in
# a normal relational database are not possible. At least not yet!
#
#
#
class View
attr_accessor :query, :design, :database, :name
# Initialize a new View object. This method should not be called from outside CouchRest Model.
def initialize(parent, new_query = {}, name = nil)
if parent.is_a? Base
raise "Name must be provided for view to be initialized" if name.nil?
@name = name
@database = parent.database
@query = { :reduce => false }
elsif parent.is_a? View
@database = parent.database
@query = parent.query.dup
else
raise "View cannot be initialized without a parent Model or View"
end
@query.update(new_query)
super
end
# == View Execution Methods
#
# Send a request to the CouchDB database using the current query values.
# Inmediatly send a request to the database for all documents provided by the query.
#
def all(&block)
args = include_docs.query
end
# Inmediatly send a request for the first result of the dataset. This will override
# any limit set in the view previously.
def first(&block)
args = limit(1).include_docs.query
end
def info
end
def offset
end
def total_rows
end
def rows
end
# == View Filter Methods
#
# View filters return an copy of the view instance with the query
# modified appropriatly. Errors will be raised if the methods
# are combined in an incorrect fashion.
#
# Find all entries in the index whose key matches the value provided.
#
# Cannot be used when the +#startkey+ or +#endkey+ have been set.
def key(value)
raise "View#key cannot be used when startkey or endkey have been set" unless query[:startkey].nil? && query[:endkey].nil?
update_query(:key => value)
end
# Find all index keys that start with the value provided. May or may not be used in
# conjunction with the +endkey+ option.
#
# When the +#descending+ option is used (not the default), the start and end keys should
# be reversed.
#
# Cannot be used if the key has been set.
def startkey(value)
raise "View#startkey cannot be used when key has been set" unless query[:key].nil?
update_query(:startkey => value)
end
# The result set should start from the position of the provided document.
# The value may be provided as an object that responds to the +#id+ call
# or a string.
def startkey_doc(value)
update_query(:startkey_docid => value.is_a?(String) ? value : value.id
end
# The opposite of +#startkey+, finds all index entries whose key is before the value specified.
#
# See the +#startkey+ method for more details and the +#inclusive_end+ option.
def endkey(value)
raise "View#endkey cannot be used when key has been set" unless query[:key].nil?
update_query(:endkey => value)
end
# The result set should end at the position of the provided document.
# The value may be provided as an object that responds to the +#id+ call
# or a string.
def endkey_doc(value)
update_query(:endkey_docid => value.is_a?(String) ? value : value.id
end
# The results should be provided in descending order.
#
# Descending is false by default, this method will enable it and cannot be undone.
def descending
update_query(:descending => true)
end
# Limit the result set to the value supplied.
def limit(value)
update_query(:limit => value)
end
# Skip the number of entries in the index specified by value. This would be
# the equivilent of an offset in SQL.
#
# The CouchDB documentation states that the skip option should not be used
# with large data sets as it is inefficient. Use the +startkey_doc+ method
# instead to skip ranges efficiently.
def skip(value = 0)
update_query(:skip => value)
end
# Use the reduce function on the view. If none is available this method will fail.
def reduce
update_query(:reduce => true)
end
# Control whether the reduce function reduces to a set of distinct keys or to a single
# result row.
#
# By default the value is false, and can only be set when the view's +#reduce+ option
# has been set.
def group
raise "View#reduce must have been set before grouping is permitted" unless query[:reduce]
update_query(:group => true)
end
def group_level(value)
raise "View#reduce and View#group must have been set before group_level is called" unless query[:reduce] && query[:group]
update_query(:group_level => value.to_i)
end
protected
def update_query(new_query = {})
self.class.new(self, new_query)
end
# Used internally to ensure that docs are provided. Should not be used outside of
# the view class under normal circumstances.
def include_docs
raise "Documents cannot be returned from a view that is prepared for a reduce" if query[:reduce]
update_query(:include_docs => true)
end
def execute(&block)
end
end
end
end

6
lib/couchrest/model/views.rb
View file

@ -23,7 +23,7 @@ module CouchRest
# view_by :tags,
# :map =>
# "function(doc) {
# if (doc['couchrest-type'] == 'Post' && doc.tags) {
# if (doc['model'] == 'Post' && doc.tags) {
# doc.tags.forEach(function(tag){
# emit(doc.tag, 1);
# });
@ -39,7 +39,7 @@ module CouchRest
# function:
#
# function(doc) {
# if (doc['couchrest-type'] == 'Post' && doc.date) {
# if (doc['model'] == 'Post' && doc.date) {
# emit(doc.date, null);
# }
# }
@ -77,7 +77,7 @@ module CouchRest
ducktype = opts.delete(:ducktype)
unless ducktype || opts[:map]
opts[:guards] ||= []
opts[:guards].push "(doc['couchrest-type'] == '#{self.to_s}')"
opts[:guards].push "(doc['#{model_type_key}'] == '#{self.to_s}')"
end
keys.push opts
design_doc.view_by(*keys)