Add version identifier to old migrations (required for Rails 5)

db/migrate/20140625134118_create_exercises.rb

@@ -1,4 +1,4 @@
-class CreateExercises < ActiveRecord::Migration
+class CreateExercises < ActiveRecord::Migration[4.2]
   def change
     create_table :exercises do |t|
       t.text :description

db/migrate/20140626143132_create_execution_environments.rb

@@ -1,4 +1,4 @@
-class CreateExecutionEnvironments < ActiveRecord::Migration
+class CreateExecutionEnvironments < ActiveRecord::Migration[4.2]
   def change
     create_table :execution_environments do |t|
       t.string :docker_image

db/migrate/20140626144036_create_submissions.rb

@@ -1,4 +1,4 @@
-class CreateSubmissions < ActiveRecord::Migration
+class CreateSubmissions < ActiveRecord::Migration[4.2]
   def change
     create_table :submissions do |t|
       t.text :code

db/migrate/20140630093736_add_reference_implementation_to_exercises.rb

@@ -1,4 +1,4 @@
-class AddReferenceImplementationToExercises < ActiveRecord::Migration
+class AddReferenceImplementationToExercises < ActiveRecord::Migration[4.2]
   def change
     add_column :exercises, :reference_implementation, :text
   end

db/migrate/20140630111215_add_indent_size_to_execution_environments.rb

@@ -1,4 +1,4 @@
-class AddIndentSizeToExecutionEnvironments < ActiveRecord::Migration
+class AddIndentSizeToExecutionEnvironments < ActiveRecord::Migration[4.2]
   def change
     add_column :execution_environments, :indent_size, :integer
   end

db/migrate/20140701120126_create_consumers.rb

@@ -1,4 +1,4 @@
-class CreateConsumers < ActiveRecord::Migration
+class CreateConsumers < ActiveRecord::Migration[4.2]
   def change
     create_table :consumers do |t|
       t.string :name

db/migrate/20140701122345_create_users.rb

@@ -1,4 +1,4 @@
-class CreateUsers < ActiveRecord::Migration
+class CreateUsers < ActiveRecord::Migration[4.2]
   def change
     create_table :users do |t|
       t.belongs_to :consumer

db/migrate/20140702100130_add_oauth_key_to_consumers.rb

@@ -1,4 +1,4 @@
-class AddOauthKeyToConsumers < ActiveRecord::Migration
+class AddOauthKeyToConsumers < ActiveRecord::Migration[4.2]
   def change
     add_column :consumers, :oauth_key, :string
   end

db/migrate/20140703070749_add_oauth_secret_to_consumers.rb

@@ -1,4 +1,4 @@
-class AddOauthSecretToConsumers < ActiveRecord::Migration
+class AddOauthSecretToConsumers < ActiveRecord::Migration[4.2]
   def change
     add_column :consumers, :oauth_secret, :string
   end

db/migrate/20140716153147_add_role_to_users.rb

@@ -1,4 +1,4 @@
-class AddRoleToUsers < ActiveRecord::Migration
+class AddRoleToUsers < ActiveRecord::Migration[4.2]
   def change
     add_column :users, :role, :string
   end

db/migrate/20140717074902_add_user_id_to_exercises.rb

@@ -1,4 +1,4 @@
-class AddUserIdToExercises < ActiveRecord::Migration
+class AddUserIdToExercises < ActiveRecord::Migration[4.2]
   def change
     add_reference :exercises, :user
   end

db/migrate/20140722125431_add_run_command_to_execution_environments.rb

@@ -1,4 +1,4 @@
-class AddRunCommandToExecutionEnvironments < ActiveRecord::Migration
+class AddRunCommandToExecutionEnvironments < ActiveRecord::Migration[4.2]
   def change
     add_column :execution_environments, :run_command, :string
   end

db/migrate/20140723135530_add_test_command_to_execution_environments.rb

@@ -1,4 +1,4 @@
-class AddTestCommandToExecutionEnvironments < ActiveRecord::Migration
+class AddTestCommandToExecutionEnvironments < ActiveRecord::Migration[4.2]
   def change
     add_column :execution_environments, :test_command, :string
   end

db/migrate/20140723135747_add_test_code_to_exercises.rb

@@ -1,4 +1,4 @@
-class AddTestCodeToExercises < ActiveRecord::Migration
+class AddTestCodeToExercises < ActiveRecord::Migration[4.2]
   def change
     add_column :exercises, :test_code, :text
   end

db/migrate/20140724155359_add_cause_to_submissions.rb

@@ -1,4 +1,4 @@
-class AddCauseToSubmissions < ActiveRecord::Migration
+class AddCauseToSubmissions < ActiveRecord::Migration[4.2]
   def change
     add_column :submissions, :cause, :string
   end

db/migrate/20140730114343_add_template_test_code_to_exercises.rb

@@ -1,4 +1,4 @@
-class AddTemplateTestCodeToExercises < ActiveRecord::Migration
+class AddTemplateTestCodeToExercises < ActiveRecord::Migration[4.2]
   def change
     add_column :exercises, :template_test_code, :text
   end

db/migrate/20140730115010_add_supports_user_defined_tests_to_exercises.rb

@@ -1,4 +1,4 @@
-class AddSupportsUserDefinedTestsToExercises < ActiveRecord::Migration
+class AddSupportsUserDefinedTestsToExercises < ActiveRecord::Migration[4.2]
   def change
     add_column :exercises, :supports_user_defined_tests, :boolean
   end

db/migrate/20140805161431_add_testing_framework_to_execution_environments.rb

@@ -1,4 +1,4 @@
-class AddTestingFrameworkToExecutionEnvironments < ActiveRecord::Migration
+class AddTestingFrameworkToExecutionEnvironments < ActiveRecord::Migration[4.2]
   def change
     add_column :execution_environments, :testing_framework, :string
   end

db/migrate/20140812102114_create_file_types.rb

@@ -1,4 +1,4 @@
-class CreateFileTypes < ActiveRecord::Migration
+class CreateFileTypes < ActiveRecord::Migration[4.2]
   def change
     create_table :file_types do |t|
       t.string :editor_mode

db/migrate/20140812144733_create_files.rb

@@ -1,4 +1,4 @@
-class CreateFiles < ActiveRecord::Migration
+class CreateFiles < ActiveRecord::Migration[4.2]
   def change
     create_table :files do |t|
       t.text :content

db/migrate/20140812150607_remove_file_type_related_columns_from_execution_environments.rb

@@ -1,4 +1,4 @@
-class RemoveFileTypeRelatedColumnsFromExecutionEnvironments < ActiveRecord::Migration
+class RemoveFileTypeRelatedColumnsFromExecutionEnvironments < ActiveRecord::Migration[4.2]
   def change
     remove_column :execution_environments, :editor_mode, :string
     remove_column :execution_environments, :file_extension, :string

db/migrate/20140812150925_remove_file_related_columns_from_exercises.rb

@@ -1,4 +1,4 @@
-class RemoveFileRelatedColumnsFromExercises < ActiveRecord::Migration
+class RemoveFileRelatedColumnsFromExercises < ActiveRecord::Migration[4.2]
   def change
     remove_column :exercises, :reference_implementation, :text
     remove_column :exercises, :supports_user_defined_tests, :boolean

db/migrate/20140813091722_remove_code_from_submissions.rb

@@ -1,4 +1,4 @@
-class RemoveCodeFromSubmissions < ActiveRecord::Migration
+class RemoveCodeFromSubmissions < ActiveRecord::Migration[4.2]
   def change
     remove_column :submissions, :code, :text
   end

db/migrate/20140820170039_add_instructions_to_exercises.rb

@@ -1,4 +1,4 @@
-class AddInstructionsToExercises < ActiveRecord::Migration
+class AddInstructionsToExercises < ActiveRecord::Migration[4.2]
   def change
     add_column :exercises, :instructions, :text
   end

db/migrate/20140821064318_add_published_to_exercises.rb

@@ -1,4 +1,4 @@
-class AddPublishedToExercises < ActiveRecord::Migration
+class AddPublishedToExercises < ActiveRecord::Migration[4.2]
   def change
     add_column :exercises, :published, :boolean
   end

db/migrate/20140823172643_add_executable_to_file_types.rb

@@ -1,4 +1,4 @@
-class AddExecutableToFileTypes < ActiveRecord::Migration
+class AddExecutableToFileTypes < ActiveRecord::Migration[4.2]
   def change
     add_column :file_types, :executable, :boolean
   end

db/migrate/20140823173923_add_renderable_to_file_types.rb

@@ -1,4 +1,4 @@
-class AddRenderableToFileTypes < ActiveRecord::Migration
+class AddRenderableToFileTypes < ActiveRecord::Migration[4.2]
   def change
     add_column :file_types, :renderable, :boolean
   end

db/migrate/20140825121336_create_external_users.rb

@@ -1,4 +1,4 @@
-class CreateExternalUsers < ActiveRecord::Migration
+class CreateExternalUsers < ActiveRecord::Migration[4.2]
   def change
     create_table :external_users do |t|
       t.belongs_to :consumer

db/migrate/20140825125801_create_internal_users.rb

@@ -1,4 +1,4 @@
-class CreateInternalUsers < ActiveRecord::Migration
+class CreateInternalUsers < ActiveRecord::Migration[4.2]
   def change
     create_table :internal_users do |t|
       t.belongs_to :consumer

db/migrate/20140825154202_drop_users.rb

@@ -1,4 +1,4 @@
-class DropUsers < ActiveRecord::Migration
+class DropUsers < ActiveRecord::Migration[4.2]
   def change
     drop_table :users
   end

db/migrate/20140825161350_add_user_type_to_exercises.rb

@@ -1,4 +1,4 @@
-class AddUserTypeToExercises < ActiveRecord::Migration
+class AddUserTypeToExercises < ActiveRecord::Migration[4.2]
   def change
     add_column :exercises, :user_type, :string
   end

db/migrate/20140825161358_add_user_type_to_file_types.rb

@@ -1,4 +1,4 @@
-class AddUserTypeToFileTypes < ActiveRecord::Migration
+class AddUserTypeToFileTypes < ActiveRecord::Migration[4.2]
   def change
     add_column :file_types, :user_type, :string
   end

db/migrate/20140825161406_add_user_type_to_submissions.rb

@@ -1,4 +1,4 @@
-class AddUserTypeToSubmissions < ActiveRecord::Migration
+class AddUserTypeToSubmissions < ActiveRecord::Migration[4.2]
   def change
     add_column :submissions, :user_type, :string
   end

db/migrate/20140826073318_sorcery_core.rb

@@ -1,4 +1,4 @@
-class SorceryCore < ActiveRecord::Migration
+class SorceryCore < ActiveRecord::Migration[4.2]
   def change
     InternalUser.delete_all
     add_column :internal_users, :crypted_password, :string, null: false

db/migrate/20140826073319_sorcery_brute_force_protection.rb

@@ -1,4 +1,4 @@
-class SorceryBruteForceProtection < ActiveRecord::Migration
+class SorceryBruteForceProtection < ActiveRecord::Migration[4.2]
   def change
     add_column :internal_users, :failed_logins_count, :integer, default: 0
     add_column :internal_users, :lock_expires_at, :datetime, default: nil

db/migrate/20140826073320_sorcery_remember_me.rb

@@ -1,4 +1,4 @@
-class SorceryRememberMe < ActiveRecord::Migration
+class SorceryRememberMe < ActiveRecord::Migration[4.2]
   def change
     add_column :internal_users, :remember_me_token, :string, default: nil
     add_column :internal_users, :remember_me_token_expires_at, :datetime, default: nil

db/migrate/20140826073321_sorcery_reset_password.rb

@@ -1,4 +1,4 @@
-class SorceryResetPassword < ActiveRecord::Migration
+class SorceryResetPassword < ActiveRecord::Migration[4.2]
   def change
     add_column :internal_users, :reset_password_token, :string, default: nil
     add_column :internal_users, :reset_password_token_expires_at, :datetime, default: nil

db/migrate/20140826073322_sorcery_user_activation.rb

@@ -1,4 +1,4 @@
-class SorceryUserActivation < ActiveRecord::Migration
+class SorceryUserActivation < ActiveRecord::Migration[4.2]
   def change
     add_column :internal_users, :activation_state, :string, default: nil
     add_column :internal_users, :activation_token, :string, default: nil

db/migrate/20140827065359_add_binary_to_file_types.rb

@@ -1,4 +1,4 @@
-class AddBinaryToFileTypes < ActiveRecord::Migration
+class AddBinaryToFileTypes < ActiveRecord::Migration[4.2]
   def change
     add_column :file_types, :binary, :boolean
   end

db/migrate/20140827083957_add_native_file_to_files.rb

@@ -1,4 +1,4 @@
-class AddNativeFileToFiles < ActiveRecord::Migration
+class AddNativeFileToFiles < ActiveRecord::Migration[4.2]
   def change
     add_column :files, :native_file, :string
   end

db/migrate/20140829141913_create_hints.rb

@@ -1,4 +1,4 @@
-class CreateHints < ActiveRecord::Migration
+class CreateHints < ActiveRecord::Migration[4.2]
   def change
     create_table :hints do |t|
       t.belongs_to :execution_environment

db/migrate/20140903093436_remove_not_null_constraints_from_internal_users.rb

@@ -1,4 +1,4 @@
-class RemoveNotNullConstraintsFromInternalUsers < ActiveRecord::Migration
+class RemoveNotNullConstraintsFromInternalUsers < ActiveRecord::Migration[4.2]
   def change
     change_column_null(:internal_users, :crypted_password, true)
     change_column_null(:internal_users, :salt, true)

db/migrate/20140903165113_create_errors.rb

@@ -1,4 +1,4 @@
-class CreateErrors < ActiveRecord::Migration
+class CreateErrors < ActiveRecord::Migration[4.2]
   def change
     create_table :errors do |t|
       t.belongs_to :execution_environment

db/migrate/20140904082810_add_token_to_exercises.rb

@@ -1,4 +1,4 @@
-class AddTokenToExercises < ActiveRecord::Migration
+class AddTokenToExercises < ActiveRecord::Migration[4.2]
   def change
     add_column :exercises, :token, :string
   end

db/migrate/20140909115430_add_file_id_to_exercises.rb

@@ -1,4 +1,4 @@
-class AddFileIdToExercises < ActiveRecord::Migration
+class AddFileIdToExercises < ActiveRecord::Migration[4.2]
   def change
     add_reference :exercises, :file
   end

db/migrate/20140915095420_add_role_to_files.rb

@@ -1,4 +1,4 @@
-class AddRoleToFiles < ActiveRecord::Migration
+class AddRoleToFiles < ActiveRecord::Migration[4.2]
   def change
     add_column :files, :role, :string
   end

db/migrate/20140915122846_remove_file_id_from_exercises.rb

@@ -1,4 +1,4 @@
-class RemoveFileIdFromExercises < ActiveRecord::Migration
+class RemoveFileIdFromExercises < ActiveRecord::Migration[4.2]
   def change
     remove_reference :exercises, :file
   end

db/migrate/20140918063522_add_hashed_content_to_files.rb

@@ -1,4 +1,4 @@
-class AddHashedContentToFiles < ActiveRecord::Migration
+class AddHashedContentToFiles < ActiveRecord::Migration[4.2]
   def change
     add_column :files, :hashed_content, :string
 

db/migrate/20140922161120_add_feedback_message_to_files.rb

@@ -1,4 +1,4 @@
-class AddFeedbackMessageToFiles < ActiveRecord::Migration
+class AddFeedbackMessageToFiles < ActiveRecord::Migration[4.2]
   def change
     add_column :files, :feedback_message, :string
   end

db/migrate/20140922161226_add_weight_to_files.rb

@@ -1,4 +1,4 @@
-class AddWeightToFiles < ActiveRecord::Migration
+class AddWeightToFiles < ActiveRecord::Migration[4.2]
   def change
     add_column :files, :weight, :float
   end

db/migrate/20141003072729_add_help_to_execution_environments.rb

@@ -1,4 +1,4 @@
-class AddHelpToExecutionEnvironments < ActiveRecord::Migration
+class AddHelpToExecutionEnvironments < ActiveRecord::Migration[4.2]
   def change
     add_column :execution_environments, :help, :text
   end

db/migrate/20141004114747_add_exposed_ports_to_execution_environments.rb

@@ -1,4 +1,4 @@
-class AddExposedPortsToExecutionEnvironments < ActiveRecord::Migration
+class AddExposedPortsToExecutionEnvironments < ActiveRecord::Migration[4.2]
   def change
     add_column :execution_environments, :exposed_ports, :string
   end

db/migrate/20141009110434_add_permitted_execution_time_to_execution_environments.rb

@@ -1,4 +1,4 @@
-class AddPermittedExecutionTimeToExecutionEnvironments < ActiveRecord::Migration
+class AddPermittedExecutionTimeToExecutionEnvironments < ActiveRecord::Migration[4.2]
   def change
     add_column :execution_environments, :permitted_execution_time, :integer
   end

db/migrate/20141011145303_add_user_id_and_user_type_to_execution_environments.rb

@@ -1,4 +1,4 @@
-class AddUserIdAndUserTypeToExecutionEnvironments < ActiveRecord::Migration
+class AddUserIdAndUserTypeToExecutionEnvironments < ActiveRecord::Migration[4.2]
   def change
     add_reference :execution_environments, :user
     add_column :execution_environments, :user_type, :string

db/migrate/20141017110211_rename_published_to_public.rb

@@ -1,4 +1,4 @@
-class RenamePublishedToPublic < ActiveRecord::Migration
+class RenamePublishedToPublic < ActiveRecord::Migration[4.2]
   def change
     rename_column :exercises, :published, :public
   end

db/migrate/20141031161603_add_path_to_files.rb

@@ -1,4 +1,4 @@
-class AddPathToFiles < ActiveRecord::Migration
+class AddPathToFiles < ActiveRecord::Migration[4.2]
   def change
     add_column :files, :path, :string
   end

db/migrate/20141119131607_create_comments.rb

@@ -1,4 +1,4 @@
-class CreateComments < ActiveRecord::Migration
+class CreateComments < ActiveRecord::Migration[4.2]
   def change
     create_table :comments do |t|
       t.references :user, index: true

db/migrate/20150128083123_create_teams.rb

@@ -1,4 +1,4 @@
-class CreateTeams < ActiveRecord::Migration
+class CreateTeams < ActiveRecord::Migration[4.2]
   def change
     create_table :teams do |t|
       t.string :name

db/migrate/20150128084834_create_internal_users_teams.rb

@@ -1,4 +1,4 @@
-class CreateInternalUsersTeams < ActiveRecord::Migration
+class CreateInternalUsersTeams < ActiveRecord::Migration[4.2]
   def change
     create_table :internal_users_teams do |t|
       t.belongs_to :internal_user, index: true

db/migrate/20150128093003_add_team_id_to_exercises.rb

@@ -1,4 +1,4 @@
-class AddTeamIdToExercises < ActiveRecord::Migration
+class AddTeamIdToExercises < ActiveRecord::Migration[4.2]
   def change
     add_reference :exercises, :team
   end

db/migrate/20150204080832_add_pool_size_to_execution_environments.rb

@@ -1,4 +1,4 @@
-class AddPoolSizeToExecutionEnvironments < ActiveRecord::Migration
+class AddPoolSizeToExecutionEnvironments < ActiveRecord::Migration[4.2]
   def change
     add_column :execution_environments, :pool_size, :integer
 

db/migrate/20150310150712_add_file_type_id_to_execution_environments.rb

@@ -1,4 +1,4 @@
-class AddFileTypeIdToExecutionEnvironments < ActiveRecord::Migration
+class AddFileTypeIdToExecutionEnvironments < ActiveRecord::Migration[4.2]
   def change
     add_reference :execution_environments, :file_type
   end

db/migrate/20150317083739_add_memory_limit_to_execution_environments.rb

@@ -1,4 +1,4 @@
-class AddMemoryLimitToExecutionEnvironments < ActiveRecord::Migration
+class AddMemoryLimitToExecutionEnvironments < ActiveRecord::Migration[4.2]
   def change
     add_column :execution_environments, :memory_limit, :integer
 

db/migrate/20150317115338_add_network_enabled_to_execution_environments.rb

@@ -1,4 +1,4 @@
-class AddNetworkEnabledToExecutionEnvironments < ActiveRecord::Migration
+class AddNetworkEnabledToExecutionEnvironments < ActiveRecord::Migration[4.2]
   def change
     add_column :execution_environments, :network_enabled, :boolean
 

db/migrate/20150327141740_create_request_for_comments.rb

@@ -1,4 +1,4 @@
-class CreateRequestForComments < ActiveRecord::Migration
+class CreateRequestForComments < ActiveRecord::Migration[4.2]
   def change
     create_table :request_for_comments do |t|
       t.integer :requestorid, :null => false

db/migrate/20150408155923_add_submission_to_error.rb

@@ -1,4 +1,4 @@
-class AddSubmissionToError < ActiveRecord::Migration
+class AddSubmissionToError < ActiveRecord::Migration[4.2]
   def change
     add_reference :errors, :submission, index: true
   end

db/migrate/20150421074734_add_file_index_to_files.rb

@@ -1,4 +1,4 @@
-class AddFileIndexToFiles < ActiveRecord::Migration
+class AddFileIndexToFiles < ActiveRecord::Migration[4.2]
   def change
     add_index(:files, [:context_id, :context_type])
   end

db/migrate/20150818141554_add_user_type_to_request_for_comments.rb

@@ -1,4 +1,4 @@
-class AddUserTypeToRequestForComments < ActiveRecord::Migration
+class AddUserTypeToRequestForComments < ActiveRecord::Migration[4.2]
   def change
     add_column :request_for_comments, :user_type, :string
   end

db/migrate/20150818142251_correct_column_names.rb

@@ -1,4 +1,4 @@
-class CorrectColumnNames < ActiveRecord::Migration
+class CorrectColumnNames < ActiveRecord::Migration[4.2]
   def change
 	rename_column :request_for_comments, :requestorid, :requestor_user_id
   	rename_column :request_for_comments, :exerciseid, :exercise_id

db/migrate/20150903152727_remove_requestor_from_request_for_comments.rb

@@ -1,4 +1,4 @@
-class RemoveRequestorFromRequestForComments < ActiveRecord::Migration
+class RemoveRequestorFromRequestForComments < ActiveRecord::Migration[4.2]
   def change
     rename_column :request_for_comments, :requestor_user_id, :user_id
   end

db/migrate/20150922125415_add_hide_file_tree_to_exercises.rb

@@ -1,4 +1,4 @@
-class AddHideFileTreeToExercises < ActiveRecord::Migration
+class AddHideFileTreeToExercises < ActiveRecord::Migration[4.2]
   def change
     add_column :exercises, :hide_file_tree, :boolean
   end

db/migrate/20160204094409_create_code_harbor_links.rb

@@ -1,4 +1,4 @@
-class CreateCodeHarborLinks < ActiveRecord::Migration
+class CreateCodeHarborLinks < ActiveRecord::Migration[4.2]
   def change
     create_table :code_harbor_links do |t|
       t.string :oauth2token

db/migrate/20160204111716_add_user_to_code_harbor_link.rb

@@ -1,4 +1,4 @@
-class AddUserToCodeHarborLink < ActiveRecord::Migration
+class AddUserToCodeHarborLink < ActiveRecord::Migration[4.2]
   def change
     add_reference :code_harbor_links, :user,  polymorphic: true, index: true
   end

db/migrate/20160302133540_create_testruns.rb

@@ -1,4 +1,4 @@
-class CreateTestruns < ActiveRecord::Migration
+class CreateTestruns < ActiveRecord::Migration[4.2]
   def change
     create_table :testruns do |t|
       t.boolean :passed

db/migrate/20160426114951_add_question_to_request_for_comments.rb

@@ -1,4 +1,4 @@
-class AddQuestionToRequestForComments < ActiveRecord::Migration
+class AddQuestionToRequestForComments < ActiveRecord::Migration[4.2]
   def change
     add_column :request_for_comments, :question, :text
   end

db/migrate/20160510145341_add_allow_file_creation_to_exercises.rb

@@ -1,4 +1,4 @@
-class AddAllowFileCreationToExercises < ActiveRecord::Migration
+class AddAllowFileCreationToExercises < ActiveRecord::Migration[4.2]
   def change
     add_column :exercises, :allow_file_creation, :boolean
   end

db/migrate/20160512131539_change_comment_text_attribute_to_text_datatype.rb

@@ -1,4 +1,4 @@
-class ChangeCommentTextAttributeToTextDatatype < ActiveRecord::Migration
+class ChangeCommentTextAttributeToTextDatatype < ActiveRecord::Migration[4.2]
   def up
     change_column :comments, :text, :text
   end

db/migrate/20160609185708_create_file_templates.rb

@@ -1,4 +1,4 @@
-class CreateFileTemplates < ActiveRecord::Migration
+class CreateFileTemplates < ActiveRecord::Migration[4.2]
   def change
     create_table :file_templates do |t|
       t.string :name

db/migrate/20160610111602_add_file_template_to_file.rb

@@ -1,4 +1,4 @@
-class AddFileTemplateToFile < ActiveRecord::Migration
+class AddFileTemplateToFile < ActiveRecord::Migration[4.2]
   def change
     add_reference :files, :file_template
   end

db/migrate/20160624130951_add_solved_to_request_for_comments.rb

@@ -1,4 +1,4 @@
-class AddSolvedToRequestForComments < ActiveRecord::Migration
+class AddSolvedToRequestForComments < ActiveRecord::Migration[4.2]
   def change
     add_column :request_for_comments, :solved, :boolean
   end

db/migrate/20160630154310_add_submission_to_request_for_comments.rb

@@ -1,4 +1,4 @@
-class AddSubmissionToRequestForComments < ActiveRecord::Migration
+class AddSubmissionToRequestForComments < ActiveRecord::Migration[4.2]
   def change
     add_reference :request_for_comments, :submission
   end

db/migrate/20160701092140_remove_requested_at_from_request_for_comments.rb

@@ -1,4 +1,4 @@
-class RemoveRequestedAtFromRequestForComments < ActiveRecord::Migration
+class RemoveRequestedAtFromRequestForComments < ActiveRecord::Migration[4.2]
   def change
     remove_column :request_for_comments, :requested_at
   end

db/migrate/20160704143402_remove_teams.rb

@@ -1,4 +1,4 @@
-class RemoveTeams < ActiveRecord::Migration
+class RemoveTeams < ActiveRecord::Migration[4.2]
   def change
     remove_reference :exercises, :team
     drop_table :teams

db/migrate/20160907123009_add_allow_auto_completion_to_exercises.rb

@@ -1,4 +1,4 @@
-class AddAllowAutoCompletionToExercises < ActiveRecord::Migration
+class AddAllowAutoCompletionToExercises < ActiveRecord::Migration[4.2]
   def change
     add_column :exercises, :allow_auto_completion, :boolean, default: false
   end

db/migrate/20170112151637_create_lti_parameters.rb

@@ -1,4 +1,4 @@
-class CreateLtiParameters < ActiveRecord::Migration
+class CreateLtiParameters < ActiveRecord::Migration[4.2]
   def change
     create_table :lti_parameters do |t|
       t.belongs_to :external_users

db/migrate/20170202170437_create_remote_evaluation_mappings.rb

@@ -1,4 +1,4 @@
-class CreateRemoteEvaluationMappings < ActiveRecord::Migration
+class CreateRemoteEvaluationMappings < ActiveRecord::Migration[4.2]
   def change
     create_table :remote_evaluation_mappings do |t|
       t.integer   "user_id",          null: false

db/migrate/20170205163247_create_exercise_collections.rb

@@ -1,4 +1,4 @@
-class CreateExerciseCollections < ActiveRecord::Migration
+class CreateExerciseCollections < ActiveRecord::Migration[4.2]
   def change
     create_table :exercise_collections do |t|
       t.string :name

db/migrate/20170205165450_create_proxy_exercises.rb

@@ -1,4 +1,4 @@
-class CreateProxyExercises < ActiveRecord::Migration
+class CreateProxyExercises < ActiveRecord::Migration[4.2]
   def change
     create_table :proxy_exercises do |t|
       t.string :title

db/migrate/20170205210357_create_interventions.rb

@@ -1,4 +1,4 @@
-class CreateInterventions < ActiveRecord::Migration
+class CreateInterventions < ActiveRecord::Migration[4.2]
   def change
     create_table :user_exercise_interventions do |t|
       t.belongs_to :user, polymorphic: true

db/migrate/20170206141210_add_tags.rb

@@ -1,4 +1,4 @@
-class AddTags < ActiveRecord::Migration
+class AddTags < ActiveRecord::Migration[4.2]
 
   def change
     add_column :exercises, :expected_worktime_seconds, :integer, default: 60

db/migrate/20170206152503_add_user_feedback.rb

@@ -1,4 +1,4 @@
-class AddUserFeedback < ActiveRecord::Migration
+class AddUserFeedback < ActiveRecord::Migration[4.2]
   def change
     create_table :user_exercise_feedbacks do |t|
       t.belongs_to :exercise, null: false

db/migrate/20170228165741_add_search.rb

@@ -1,4 +1,4 @@
-class AddSearch < ActiveRecord::Migration
+class AddSearch < ActiveRecord::Migration[4.2]
   def change
     create_table :searches do |t|
       t.belongs_to :exercise, null: false

db/migrate/20170321150454_add_reason_to_user_proxy_exercise_exercise.rb

@@ -1,4 +1,4 @@
-class AddReasonToUserProxyExerciseExercise < ActiveRecord::Migration
+class AddReasonToUserProxyExerciseExercise < ActiveRecord::Migration[4.2]
   def change
     change_table :user_proxy_exercise_exercises do |t|
       t.string :reason

db/migrate/20170323130756_add_index_to_submissions.rb

@@ -1,4 +1,4 @@
-class AddIndexToSubmissions < ActiveRecord::Migration
+class AddIndexToSubmissions < ActiveRecord::Migration[4.2]
   def change
     add_index :submissions, :exercise_id
     add_index :submissions, :user_id

db/migrate/20170403162848_set_default_for_request_for_comment_solved.rb

@@ -1,4 +1,4 @@
-class SetDefaultForRequestForCommentSolved < ActiveRecord::Migration
+class SetDefaultForRequestForCommentSolved < ActiveRecord::Migration[4.2]
   def change
     change_column_default :request_for_comments, :solved, false
     RequestForComment.where(solved: nil).update_all(solved: false)

db/migrate/20170411090543_improve_user_feedback.rb

@@ -1,4 +1,4 @@
-class ImproveUserFeedback < ActiveRecord::Migration
+class ImproveUserFeedback < ActiveRecord::Migration[4.2]
   def change
     add_column :user_exercise_feedbacks, :user_estimated_worktime, :integer
   end

db/migrate/20170608141612_add_thank_you_note_to_request_for_comments.rb

@@ -1,4 +1,4 @@
-class AddThankYouNoteToRequestForComments < ActiveRecord::Migration
+class AddThankYouNoteToRequestForComments < ActiveRecord::Migration[4.2]
   def change
     add_column :request_for_comments, :thank_you_note, :text
   end

db/migrate/20170703075832_create_error_templates.rb

@@ -1,4 +1,4 @@
-class CreateErrorTemplates < ActiveRecord::Migration
+class CreateErrorTemplates < ActiveRecord::Migration[4.2]
   def change
     create_table :error_templates do |t|
       t.belongs_to :execution_environment

db/migrate/20170703075959_create_error_template_attributes.rb

@@ -1,4 +1,4 @@
-class CreateErrorTemplateAttributes < ActiveRecord::Migration
+class CreateErrorTemplateAttributes < ActiveRecord::Migration[4.2]
   def change
     create_table :error_template_attributes do |t|
       t.belongs_to :error_template

db/migrate/20170703080205_create_structured_errors.rb

@@ -1,4 +1,4 @@
-class CreateStructuredErrors < ActiveRecord::Migration
+class CreateStructuredErrors < ActiveRecord::Migration[4.2]
   def change
     create_table :structured_errors do |t|
       t.references :error_template