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Delegate first!, last!, any? and many? to scoped

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1 parent e8d20b8 commit a9dafbb28de3e34c31ebf184fbc4e2042c7ff207 @pixeltrix pixeltrix committed Mar 29, 2011
@@ -437,7 +437,8 @@ class Base
self._attr_readonly = []
class << self # Class methods
- delegate :find, :first, :last, :all, :destroy, :destroy_all, :exists?, :delete, :delete_all, :update, :update_all, :to => :scoped
+ delegate :find, :first, :first!, :last, :last!, :all, :exists?, :any?, :many?, :to => :scoped
+ delegate :destroy, :destroy_all, :delete, :delete_all, :update, :update_all, :to => :scoped
delegate :find_each, :find_in_batches, :to => :scoped
delegate :select, :group, :order, :except, :reorder, :limit, :offset, :joins, :where, :preload, :eager_load, :includes, :from, :lock, :readonly, :having, :create_with, :to => :scoped
delegate :count, :average, :minimum, :maximum, :sum, :calculate, :to => :scoped
@@ -208,6 +208,14 @@ def test_first_bang_missing
end
end
+ def test_model_class_responds_to_first_bang
+ assert_equal topics(:first), Topic.first!
+ assert_raises ActiveRecord::RecordNotFound do
+ Topic.delete_all
+ Topic.first!
+ end
+ end
+
def test_last_bang_present
assert_nothing_raised do
assert_equal topics(:second), Topic.where("title = 'The Second Topic of the day'").last!
@@ -220,6 +228,14 @@ def test_last_bang_missing
end
end
+ def test_model_class_responds_to_last_bang
+ assert_equal topics(:fourth), Topic.last!
+ assert_raises ActiveRecord::RecordNotFound do
+ Topic.delete_all
+ Topic.last!
+ end
+ end
+
def test_unexisting_record_exception_handling
assert_raise(ActiveRecord::RecordNotFound) {
Topic.find(1).parent
@@ -64,7 +64,7 @@ def test_subclasses_inherit_scopes
assert Reply.scopes.include?(:base)
assert_equal Reply.find(:all), Reply.base
end
-
+
def test_classes_dont_inherit_subclasses_scopes
assert !ActiveRecord::Base.scopes.include?(:base)
end
@@ -246,6 +246,12 @@ def test_any_should_not_fire_query_if_scope_loaded
assert_no_queries { assert topics.any? }
end
+ def test_model_class_should_respond_to_any
+ assert Topic.any?
+ Topic.delete_all
+ assert !Topic.any?
+ end
+
def test_many_should_not_load_results
topics = Topic.base
assert_queries(2) do
@@ -280,6 +286,15 @@ def test_many_should_return_true_if_more_than_one
assert Topic.base.many?
end
+ def test_model_class_should_respond_to_many
+ Topic.delete_all
+ assert !Topic.many?
+ Topic.create!
+ assert !Topic.many?
+ Topic.create!
+ assert Topic.many?
+ end
+
def test_should_build_on_top_of_scope
topic = Topic.approved.build({})
assert topic.approved
@@ -962,6 +962,26 @@ Client.exists?
The above returns +false+ if the +clients+ table is empty and +true+ otherwise.
+You can also use +any?+ and +many?+ to check for existence on a model or relation.
+
+<ruby>
+# via a model
+Post.any?
+Post.many?
+
+# via a named scope
+Post.recent.any?
+Post.recent.many?
+
+# via a relation
+Post.where(:published => true).any?
+Post.where(:published => true).many?
+
+# via an association
+Post.first.categories.any?
+Post.first.categories.many?
+</ruby>
+
h3. Calculations
This section uses count as an example method in this preamble, but the options described apply to all sub-sections.

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