er.attachment.migrations
Class ERAttachmentMigration

java.lang.Object
  er.extensions.migration.ERXMigrationDatabase.Migration
      er.attachment.migrations.ERAttachmentMigration

All Implemented Interfaces:

IERXMigration

public abstract class ERAttachmentMigration
extends ERXMigrationDatabase.Migration

Provides a base class for a migration that adds an attachment to an existing table.

Author:

mschrag

Field Summary

Fields inherited from class er.extensions.migration.ERXMigrationDatabase.Migration

ALLOWS_NULL, NOT_NULL

Constructor Summary

ERAttachmentMigration(java.lang.String tableName, java.lang.String columnName, boolean allowsNull)
Construct an ERAttachmentMigration.

Method Summary

void	downgrade(com.webobjects.eocontrol.EOEditingContext editingContext, ERXMigrationDatabase database)
com.webobjects.foundation.NSArray<ERXModelVersion>	modelDependencies() Overridden to return null by default
void	upgrade(com.webobjects.eocontrol.EOEditingContext editingContext, ERXMigrationDatabase database)

Methods inherited from class er.extensions.migration.ERXMigrationDatabase.Migration

downgrade, languages, upgrade

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

ERAttachmentMigration

public ERAttachmentMigration(java.lang.String tableName,
                             java.lang.String columnName,
                             boolean allowsNull)

Construct an ERAttachmentMigration.

Parameters:

tableName - the name of the table to add an attachment to

columnName - the name of the attachment foreign key column

allowsNull - whether or not the attachment is allowed to be null

Method Detail

modelDependencies

public com.webobjects.foundation.NSArray<ERXModelVersion> modelDependencies()

Description copied from class: ERXMigrationDatabase.Migration

Overridden to return null by default

Specified by:

modelDependencies in interface IERXMigration

Overrides:

modelDependencies in class ERXMigrationDatabase.Migration

Returns:

an array of model versions that this migration depends on

downgrade

public void downgrade(com.webobjects.eocontrol.EOEditingContext editingContext,
                      ERXMigrationDatabase database)
               throws java.lang.Throwable

Specified by:

downgrade in class ERXMigrationDatabase.Migration

Parameters:

editingContext - the editing context

database - the migration database

Throws:

java.lang.Throwable - if anything goes wrong

See Also:

IERXMigration.downgrade

upgrade

public void upgrade(com.webobjects.eocontrol.EOEditingContext editingContext,
                    ERXMigrationDatabase database)
             throws java.lang.Throwable

Specified by:

upgrade in class ERXMigrationDatabase.Migration

Parameters:

editingContext - the editing context

database - the migration database

Throws:

java.lang.Throwable - if anything goes wrong

See Also:

IERXMigration.upgrade