Fixed that fixtures were being deleted in the same order as inserts c…

…ausing FK errors #890 [andrew.john.peters@gmail.com]

git-svn-id: http://svn-commit.rubyonrails.org/rails/trunk@1205 5ecf4fe2-1ee6-0310-87b1-e25e094e27de

activerecord/CHANGELOG

@@ -1,5 +1,7 @@
 *SVN*
 
+* Fixed that fixtures were being deleted in the same order as inserts causing FK errors #890 [andrew.john.peters@gmail.com]
+
 * Fixed loading of fixtures in to be in the right order (or PostgreSQL would bark) #1047 [stephenh@chase3000.com]
 
 * Fixed page caching for non-vhost applications living underneath the root #1004 [Ben Schumacher]

activerecord/lib/active_record/fixtures.rb

@@ -251,6 +251,8 @@ def self.reset_sequences(connection, table_names)
     end
   end
 
+  attr_reader :table_name
+
   def initialize(connection, table_name, fixture_path, file_filter = DEFAULT_FILTER_RE)
     @connection, @table_name, @fixture_path, @file_filter = connection, table_name, fixture_path, file_filter
     @class_name = Inflector.classify(@table_name)
@@ -470,30 +472,35 @@ def self.method_added(method)
       private
         def load_fixtures
           @loaded_fixtures = {}
-          fixture_table_names.each do |table_name|
-            @loaded_fixtures[table_name] = Fixtures.create_fixtures(fixture_path, table_name)
+          fixtures = Fixtures.create_fixtures(fixture_path, fixture_table_names)
+          unless fixtures.nil?
+            if fixtures.instance_of?(Fixtures)
+              @loaded_fixtures[fixtures.table_name] = fixtures
+            else
+              fixtures.each { |f| @loaded_fixtures[f.table_name] = f }
+            end
           end
         end
-        
+
         # for pre_loaded_fixtures, only require the classes once. huge speed improvement
         @@required_fixture_classes = false
-        
+
         def instantiate_fixtures
           if pre_loaded_fixtures
             raise RuntimeError, 'Load fixtures before instantiating them.' if Fixtures.all_loaded_fixtures.empty?
             unless @@required_fixture_classes
-              self.class.require_fixture_classes Fixtures.all_loaded_fixtures.keys 
+              self.class.require_fixture_classes Fixtures.all_loaded_fixtures.keys
               @@required_fixture_classes = true
             end
             Fixtures.instantiate_all_loaded_fixtures(self, load_instances?)
-          else 
+          else
             raise RuntimeError, 'Load fixtures before instantiating them.' if @loaded_fixtures.nil?
             @loaded_fixtures.each do |table_name, fixtures|
               Fixtures.instantiate_fixtures(self, table_name, fixtures, load_instances?)
             end
           end
         end
-        
+
         def load_instances?
           use_instantiated_fixtures != :no_instances
         end

activerecord/test/fixtures/db_definitions/db2.sql

@@ -164,3 +164,14 @@ CREATE TABLE categories_posts (
   category_id int NOT NULL,
   post_id int NOT NULL
 );
+
+CREATE TABLE fk_test_has_pk (
+  id INTEGER NOT NULL PRIMARY KEY
+);
+
+CREATE TABLE fk_test_has_fk (
+  id    INTEGER NOT NULL PRIMARY KEY,
+  fk_id INTEGER NOT NULL,
+
+  FOREIGN KEY (fk_id) REFERENCES fk_test_has_pk(id)
+);

activerecord/test/fixtures/db_definitions/mysql.sql

@@ -166,3 +166,14 @@ CREATE TABLE `categories_posts` (
   `category_id` int(11) NOT NULL,
   `post_id` int(11) NOT NULL
 );
+
+CREATE TABLE `fk_test_has_pk` (
+  `id` INTEGER NOT NULL PRIMARY KEY
+);
+
+CREATE TABLE `fk_test_has_fk` (
+  `id`    INTEGER NOT NULL PRIMARY KEY,
+  `fk_id` INTEGER NOT NULL,
+
+  FOREIGN KEY (`fk_id`) REFERENCES `fk_test_has_pk`(`id`)
+);

activerecord/test/fixtures/db_definitions/oci.sql

@@ -202,3 +202,12 @@ create table categories_posts (
   category_id integer not null references developers initially deferred disable,
   post_id int integer not null references developers initially deferred disable
 );
+
+create table fk_test_has_pk (
+  id integer not null primary key
+);
+
+create table fk_test_has_fk (
+  id integer not null primary key,
+  fk_id integer not null references fk_test_has_fk initially deferred disable,
+);

activerecord/test/fixtures/db_definitions/postgresql.sql

@@ -183,3 +183,12 @@ CREATE TABLE categories_posts (
   category_id integer NOT NULL,
   post_id integer NOT NULL
 );
+
+CREATE TABLE fk_test_has_pk (
+  id INTEGER NOT NULL PRIMARY KEY
+);
+
+CREATE TABLE fk_test_has_fk (
+  id    INTEGER NOT NULL PRIMARY KEY,
+  fk_id INTEGER NOT NULL REFERENCES fk_test_has_fk(id)
+);

activerecord/test/fixtures/db_definitions/sqlite.sql

@@ -151,3 +151,14 @@ CREATE TABLE 'categories_posts' (
   'category_id' INTEGER NOT NULL,
   'post_id' INTEGER NOT NULL
 );
+
+CREATE TABLE 'fk_test_has_pk' (
+  'id' INTEGER NOT NULL PRIMARY KEY
+);
+
+CREATE TABLE 'fk_test_has_fk' (
+  'id'    INTEGER NOT NULL PRIMARY KEY,
+  'fk_id' INTEGER NOT NULL,
+
+  FOREIGN KEY ('fk_id') REFERENCES 'fk_test_has_pk'('id')
+);

activerecord/test/fixtures/db_definitions/sqlserver.sql

@@ -151,3 +151,14 @@ CREATE TABLE categories_posts (
   category_id int NOT NULL,
   post_id int NOT NULL
 );
+
+CREATE TABLE fk_test_has_pk (
+  id INTEGER NOT NULL PRIMARY KEY
+);
+
+CREATE TABLE fk_test_has_fk (
+  id    INTEGER NOT NULL PRIMARY KEY,
+  fk_id INTEGER NOT NULL,
+
+  FOREIGN KEY (fk_id) REFERENCES fk_test_has_pk(id)
+);

activerecord/test/fixtures/fk_test_has_fk.yml

@@ -0,0 +1,3 @@
+first:
+  id: 1
+  fk_id: 1

activerecord/test/fixtures/fk_test_has_pk.yml

@@ -0,0 +1,2 @@
+first:
+  id: 1

activerecord/test/fixtures_test.rb

@@ -179,3 +179,27 @@ def test_fixture_table_names
     assert_equal([:topics, :developers, :accounts], fixture_table_names)
   end
 end
+
+
+class ForeignKeyFixturesTest < Test::Unit::TestCase
+  fixtures :fk_test_has_pk, :fk_test_has_fk
+
+  # if foreign keys are implemented and fixtures
+  # are not deleted in reverse order then this test
+  # case will raise StatementInvalid
+
+  def test_number1
+    assert true
+  end
+
+  def test_number2
+    assert true
+  end
+
+end
+
+
+
+
+
+