Merge pull request #26019 from agrobbin/schema-load-unique-column-indices

Support multiple indexes on the same column when loading the schema

activerecord/lib/active_record/connection_adapters/abstract/schema_definitions.rb

@@ -211,7 +211,7 @@ module ActiveRecord
 
       def initialize(name, temporary = false, options = nil, as = nil, comment: nil)
         @columns_hash = {}
-        @indexes = {}
+        @indexes = []
         @foreign_keys = []
         @primary_keys = nil
         @temporary = temporary
@@ -327,7 +327,7 @@ module ActiveRecord
       #
       #   index(:account_id, name: 'index_projects_on_account_id')
       def index(column_name, options = {})
-        indexes[column_name] = options
+        indexes << [column_name, options]
       end
 
       def foreign_key(table_name, options = {}) # :nodoc:

activerecord/lib/active_record/connection_adapters/abstract/schema_statements.rb

@@ -278,7 +278,7 @@ module ActiveRecord
         result = execute schema_creation.accept td
 
         unless supports_indexes_in_create?
-          td.indexes.each_pair do |column_name, index_options|
+          td.indexes.each do |column_name, index_options|
             add_index(table_name, column_name, index_options)
           end
         end

activerecord/test/cases/ar_schema_test.rb

@@ -17,6 +17,7 @@ if ActiveRecord::Base.connection.supports_migrations?
       @connection.drop_table :nep_fruits rescue nil
       @connection.drop_table :nep_schema_migrations rescue nil
       @connection.drop_table :has_timestamps rescue nil
+      @connection.drop_table :multiple_indexes rescue nil
       ActiveRecord::SchemaMigration.delete_all rescue nil
       ActiveRecord::Migration.verbose = @original_verbose
     end
@@ -93,6 +94,21 @@ if ActiveRecord::Base.connection.supports_migrations?
       assert_equal "20131219224947", ActiveRecord::SchemaMigration.normalize_migration_number("20131219224947")
     end
 
+    def test_schema_load_with_multiple_indexes_for_column_of_different_names
+      ActiveRecord::Schema.define do
+        create_table :multiple_indexes do |t|
+          t.string "foo"
+          t.index ["foo"], name: "multiple_indexes_foo_1"
+          t.index ["foo"], name: "multiple_indexes_foo_2"
+        end
+      end
+
+      indexes = @connection.indexes("multiple_indexes")
+
+      assert_equal 2, indexes.length
+      assert_equal ["multiple_indexes_foo_1", "multiple_indexes_foo_2"], indexes.collect(&:name).sort
+    end
+
     def test_timestamps_without_null_set_null_to_false_on_create_table
       ActiveRecord::Schema.define do
         create_table :has_timestamps do |t|