CHANGELOG.md

Unreleased Changes

• Feature - Aws::Record::Marshalers::EpochTimeMarshaler - Adds the epoch_time_attr, which behaves much like time_attr except the Amazon DynamoDB storage type is numeric, and the serialized value is epoch seconds.

2.1.0 (2018-06-25)

• Feature - Aws::Record - Add the persisted?, new_record?, and destroyed? methods to Aws::Record, which supports use cases where you'd like to see if a record has just been newly initialized, or has been deleted or was a preexisting record retrieved from DynamoDB. Note that these methods are present in ActiveModel::Model so you should require that module before Aws::Record

• Feature - Aws::Record - Add the assign_attributes, update, and update! methods to Aws::Record which supports the use case where the user might want to mass assign or update a records attributes by hash. update! also ensures that a ValidationError is thrown on an invalid update

• Upgrading - If you already include ActiveModel::Model on your models the new persisted?, new_record? and destroyed? methods will not function properly unless you include ActiveModel::Model before Aws::Record. Additionally, new methods could lead to collisions if you happened to have attributes such as :update or :assign_attributes. In such a case, you would want to version lock below 2.1.0, or use the :database_attribute_name property and change your attribute name in code.

2.0.2 (2018-06-08)

• Feature - Aws::Record::Marshalers::TimeMarshaler - Adds the time_attr method to AWS Record models, which uses Time as the underlying type.

2.0.1 (2017-10-27)

• Feature - Aws::Record::ItemCollection - Add the #page and #last_evaluated_key methods to Aws::Record::ItemCollection. This helps to support use cases where you'd like to control the result set size with the :limit parameter, or if you want to expose pagination capabilities to an outside caller, for example a list-type operation exposed in a web API.

2.0.0 (2017-08-29)

• Upgrading - Aws::Record - Support version 3 of the AWS SDK for Ruby. This is being released as major version 2 of aws-record, though the APIs remain the same. Do note, however, that we've changed our SDK dependency to only depend on aws-sdk-dynamodb. This means that if you were depending on other service clients transitively via aws-record, you will need to add dependencies on the appropriate service gems when upgrading.

1.1.1 (2017-06-16)

• Feature - Support lambdas for default attribute values.

  date_attr :date, default_value -> { Date.today }

• Issue - An attribute's default_value could be modified and carried over to new instances of the model. With this change, default values are deep copied, and are hydrated at item creation to ensure correct persistence of mutable objects.

  See related GitHub issue #69

1.1.0 (2017-04-21)

• Feature - Aws::Record::TableConfig - A declarative way to describe configuration for your Amazon DynamoDB tables, with smart migrations based on the current remote state. More details in the documentation.

• Issue - Aws::Record::TableMigration - Legacy table migrations could have issues with global secondary indexes if a table was deleted and recreated multiple times.

  See related GitHub issue #64.

1.0.3 (2016-12-19)

• Feature - Aws::Record::ItemOperations - Adds the find_with_opts class method to model instances, which allows users to pass in both the key (as in find) and parameters which are to be passed through to the underlying Aws::DynamoDB::Client#get_item call.

1.0.2 (2016-12-02)

• Issue - Aws::Record::ItemOperations - Fixes an issue where update operations which consist of only REMOVE expressions failed due to an empty :expression_attribute_values map. The fix makes the presence of that map conditional on the existance of valid values.

1.0.1 (2016-08-24)

• Issue - Aws::Record::ItemCollection - Fixes a faulty #empty? implementation, which could return false for a response which is, in fact, empty.

1.0.0 (2016-08-15)

• Issue - Aws::Record - Fixes the #table_exists? and #provisioned_throughput methods, which could fail if called before #table_name.

1.0.0.pre.10 (2016-08-03)

• Feature - Aws::Record - Refactored tracking of model attributes, key attributes, and item data to use internal classes over module composition. Dirty tracking is also handled more consistently across attributes, and turning on/off of dirty tracking is only possible at the model level (not for individual attributes).

1.0.0.pre.9 (2016-07-22)

• Feature - Aws::Record::Attribute - Added support for default values at the attribute level.

• Feature - Aws::Record::Marshalers - Removed the marshalers in the Aws::Attributes namespace, replacing them with instantiated marshaler objects. This enables more functionality in marshalers such as the Date/DateTime marshalers.

• Feature - Aws::Record::DirtyTracking - Improves dirty tracking by adding support for tracking mutations of attribute value objects. This feature is on by default for the "collection" types: :list_attr, :map_attr, :string_set_attr, and :numeric_set_attr.

  Before this feature, the #save method's default behavior of running an update call for dirty attributes only could cause problems for users of collection attributes. As many of them are commonly manipulated using mutable state, the underlying "clean" version of the objects would be modified and the updated object would not be recognized as dirty, and therefore would not be updated at all unless explicitly marked as dirty or through a force put.

  class Model
    include Aws::Record
    string_attr :uuid, hash_key: true
    list_attr :collection
  end
  
  item = Model.new(uuid: SecureRandom.uuid, collection: [1,2,3])
  item.clean! # As if loaded from the database, to demonstrate the new tracking.
  item.dirty? # => false
  item.collection << 4 # In place mutation of the "collection" array.
  item.dirty? # => true (Previous versions would not recognize this as dirty.
  item.save # Would call Aws::DynamoDB::Client#update_item for :collection only.

  Note that this feature is implemented using deep copies of collection objects in memory, so there is a potential memory/performance hit in exchange for the added accuracy. As such, mutation tracking can be explicitly turned off at the attribute level or at the full model level, if desired.

  # Note that the disabling of mutation tracking is redundant in this example,
  # for illustration purposes.
  class Model
    include Aws::Record
    disable_mutation_tracking # For turning off mutation at the model level.
    string_attr :uuid, hash_key: true
    list_attr :collection, mutation_tracking: false # Turn off at attr level.
  end

1.0.0.pre.8 (2016-05-19)

• Feature - Aws::Record - Adds the ability to set initial attribute values when calling #initialize. Additionally, can call update on a model to directly call Aws::DynamoDB::Client#update_item.

1.0.0.pre.7 (2016-04-21)

• Upgrading - Aws::Record - This release includes changes to validation and to the #save and #save! methods. With this release, the validation hooks in Aws::Record::Attribute have been removed. Additionally, #save will resume raising exceptions on client errors. However, #save and #save! will attempt to call #valid? if defined on the model, and will return false or raise as appropriate if that method is defined and returns false.

  As a part of this change, we've removed the built in #valid? and #errors methods. If you were a user of those, consider bringing your own validation library such as ActiveModel::Validations.

• Issue - Aws::Record - Removes #valid? and #errors methods, which caused a conflict with the ability to bring your own validation library such as ActiveModel::Validations. Added tests as an example and to test compatibility.

1.0.0.pre.6 (2016-04-19)

• Feature - Aws::Record::Attributes - Improves default marshaling behavior for set types. Now, if your object responds to :to_set, such as an Array, it will automatically be marshaled to a set type when persisted.

1.0.0.pre.5 (2016-04-19)

• Upgrading - Aws::Record - The conditional put/update logic added to #save and #save! is not backwards compatible in some cases. For example, the following code would work in previous versions, but not in this version:

  item = Model.new # Assume :id is the hash key, there is no range key.
  item.id = 1
  item.content = "First write."
  item.save
  
  smash = Model.new
  smash.id = 1
  smash.content = "Second write."
  smash.save # false, and populates the errors array.
  smash.save(force: true) # This will skip the conditional check and work.
  
  updatable = Model.find(id: 1)
  updatable.content = "Update write."
  updatable.save # This works and uses an update client call.

  If you want to maintain previous behavior of unconditional puts, add the force: true option to your #save calls. However, this risks overwriting unmodeled attributes, or attributes excluded from your projection. But, the option is available for you to use.

• Upgrading - Aws::Record - The split of the #save method into #save and #save! breaks when your code is expecting #save to raise exceptions. #save will return false on a failed write and populate an errors array. If you wish to raise exceptions on failed save attempts, use the #save! method.

• Feature - Aws::Record - Adds logic to determine if #save and #save! calls should use Aws::DynamoDB::Client#put_item or Aws::DynamoDB::Client#update_item, depending on which item attributes are marked as dirty. #put_item calls are also made conditional on the key not existing, so accidental overwrites can be prevented. Old behavior of unconditional #put_item calls can be done using the force: true parameter.

• Feature - Aws::Record - Separates the #save method into #save and #save!. #save! will raise any errors that occur during persistence, while #save will populate an errors array and cause #valid? calls on the item to return false.

• Issue - Aws::Record - Changed how default table names are generated. In the past, the default table name could not handle class names that included modules. Now, module namespaces are appended to the default table name. This should not affect any existing model classes, as previously any affected models would have failed to create a table in DynamoDB.

1.0.0.pre.4 (2016-02-11)

• Feature - Aws::Record::DirtyTracking - Aws::Record items will now keep track of "dirty" changes from database state. The DirtyTracking module provides a set of helper methods to handle dirty attributes.

1.0.0.pre.3 (2016-02-10)

• Feature - Aws::Record - Support for additional marshaled types, such as lists, maps, and string/numeric sets.

1.0.0.pre.2 (2016-02-04)

• Feature - Aws::Record - Provides a low-level interface for the client #query and #scan methods. Query and Scan results are surfaces as an enumerable collection of Aws::Record items.

• Feature - Aws::Record - Support for adding global secondary indexes and local secondary indexes to your model classes. Built-in support for creating these indexes at table creation time.

1.0.0.pre.1 (2015-12-23)

• Feature - Aws::Record - Initial development release of the aws-record gem. Includes basic table and item functionality for CRUD operations.