Release Notes

v6.0.0

This is a major release and contains breaking changes. Please read the notes below carefully.

Breaking changes:

  • BinaryAttribute and BinarySetAttribute have undergone breaking changes:

    • The attributes’ internal encoding has changed. To prevent this change going unnoticed, a new required legacy_encoding parameter was added: see Upgrading Binary(Set)Attribute for details. If your codebase uses BinaryAttribute or BinarySetAttribute, go over the attribute declarations and mark them accordingly.

    • When using binary attributes, the return value of serialize() will no longer be JSON-serializable since it will contain bytes objects. Use to_dynamodb_dict() and to_simple_dict() for JSON-serializable mappings. for a safe JSON-serializable representation.

  • Python 3.6 is no longer supported.

  • PynamoDB no longer has a default AWS region (used to be us-east-1) (#1003). If needed, update your models’ Meta or set the AWS_DEFAULT_REGION environment variable.

  • Model’s JSON serialization helpers were changed:

  • Attribute’s default parameter must be either an immutable value (of one of the built-in immutable types) or a callable. This prevents a common class of errors caused by unintentionally mutating the default value. A simple workaround is to pass an initializer (e.g. change default={} to default=dict) or wrap in a lambda (e.g. change default={'foo': 'bar'} to default=lambda: {'foo': 'bar'}).

  • count(), query(), and scan() are now instance methods.

  • OperationSettings has been removed.

Major changes:

  • We are now compatible with opentelemetry botocore instrumentation.

  • We’ve reduced our usage of botocore private APIs (#1079). On multiple occasions, new versions of botocore broke PynamoDB, and this change lessens the likelihood of that happening in the future by reducing (albeit not eliminating) our reliance on private botocore APIs.

Minor changes:

  • save(), update(), delete_item(), and delete() now accept a add_version_condition parameter. See Conditioning on the version for more details.

  • batch_get(), has guard rails defending against items without a hash_key and range_key.

  • set(), can remove attribute by assigning an empty value in the update expression.

v5.5.1

  • Fix compatibility with botocore 1.33.2 (#1205)

v5.5.0

v5.4.1

  • Use model’s AWS credentials in threads (#1164)

    A model can specify custom AWS credentials in the Meta class (in lieu of “global” AWS credentials from the environment). Previously those model-specific credentials were not used from within new threads.

Contributors to this release:

  • @atsuoishimoto

v5.4.0

v5.3.2

  • Prevent typing_tests from being installed into site-packages (#1118)

Contributors to this release:

v5.3.1

  • Fixed issue introduced in 5.3.0: using TableConnection directly (not through a model) raised the following exception:

    pynamodb.exceptions.TableError: Meta-table for '(table-name)' not initialized

  • Fix typing on TransactGet (backport of #1057)

v5.3.0

  • No longer call DescribeTable API before first operation

    Before this change, we would call DescribeTable before the first operation on a given table in order to discover its schema. This slowed down bootstrap (particularly important for lambdas), complicated testing and could potentially cause inconsistent behavior since queries were serialized using the table’s (key) schema but deserialized using the model’s schema.

    With this change, both queries and models now use the model’s schema.

v5.2.3

  • Update for botocore 1.28 private API change (#1087) which caused the following exception:

    TypeError: Cannot mix str and non-str arguments

v5.2.2

  • Update for botocore 1.28 private API change (#1083) which caused the following exception:

    TypeError: _convert_to_request_dict() missing 1 required positional argument: 'endpoint_url'

v5.2.1

  • Fix issue from 5.2.0 with attempting to set GSI provisioned throughput on PAY_PER_REQUEST billing mode (#1018)

v5.2.0

  • The IndexMeta class has been removed. Now type(Index) == type (#998)

  • JSON serialization support (Model.to_json and Model.from_json) has been added (#857)

  • Improved type annotations for expressions and transactions (#951, #991)

  • Always use Model attribute definitions in create table schema (#996)

v5.1.0

date

2021-06-29

  • Introduce DynamicMapAttribute to enable partially defining attributes on a MapAttribute (#868)

  • Quality of life improvements: Type annotations, better comment, more resilient test (#934, #936, #948)

  • Fix type annotation of is_in conditional expression (#947)

  • Null errors should include full attribute path (#915)

  • Fix for serializing and deserializing dates prior to year 1000 (#949)

v5.0.3

date

2021-02-14

This version has an unintentional breaking change:

  • Propagate Model.serialize’s null_check parameter to nested MapAttributes (#908)

    Previously null errors (persisting None into an attribute defined as null=False) were ignored for attributes in map attributes that were nested in maps or lists. After upgrade, these will resulted in an AttributeNullError being raised.

v5.0.2

date

2021-02-11

  • Do not serialize all attributes for updates and deletes (#905)

v5.0.1

date

2021-02-10

  • Fix type errors when deriving from a MapAttribute and another type (#904)

v5.0.0

date

2021-01-26

This is major release and contains breaking changes. Please read the notes below carefully.

Breaking changes:

  • Python 2 is no longer supported. Python 3.6 or greater is now required.

  • UnicodeAttribute and BinaryAttribute now support empty values (#830)

    In previous versions, assigning an empty value to would be akin to assigning None: if the attribute was defined with null=True then it would be omitted, otherwise an error would be raised.

    As of May 2020, DynamoDB supports empty values for String and Binary attributes. This release of PynamoDB starts treating empty values like any other values. If existing code unintentionally assigns empty values to StringAttribute or BinaryAttribute, this may be a breaking change: for example, the code may rely on the fact that in previous versions empty strings would be “read back” as None values when reloaded from the database.

  • UTCDateTimeAttribute now strictly requires the date string format '%Y-%m-%dT%H:%M:%S.%f%z' to ensure proper ordering. PynamoDB has always written values with this format but previously would accept reading other formats. Items written using other formats must be rewritten before upgrading.

  • Table backup functionality (Model.dump[s] and Model.load[s]) has been removed.

  • Model.query no longer converts unsupported range key conditions into filter conditions.

  • Internal attribute type constants are replaced with their “short” DynamoDB version (#827)

  • Remove ListAttribute.remove_indexes (added in v4.3.2) and document usage of remove for list elements (#838)

  • Remove pynamodb.connection.util.pythonic (#753) and (#865)

  • Remove ModelContextManager class (#861)

Features:

  • Polymorphism

    This release introduces Polymorphism support via DiscriminatorAttribute. Discriminator values are written to DynamoDB and used during deserialization to instantiate the desired class.

  • Model Serialization

    The Model class now includes public methods for serializing and deserializing its attributes. Model.serialize and Model.deserialize convert the model to/from a dictionary of DynamoDB attribute values.

Other changes in this release:

  • Typed list attributes can now support any Attribute subclass (#833)

  • Most API operation methods now accept a settings argument to customize settings of individual operations. This currently allow adding or overriding HTTP headers. (#887)

  • Add the attribute name to error messages when deserialization fails (#815)

  • Add the table name to error messages for transactional operations (#835)

Contributors to this release:

v4.4.0

  • Update for botocore 1.28 private API change (#1130) which caused the following exception:

    TypeError: _convert_to_request_dict() missing 1 required positional argument: 'endpoint_url'

v4.3.3

  • Add type stubs for indexing into a ListAttribute for forming conditional expressions (#774)

    class MyModel(Model):
  ...
  my_list = ListAttribute()

MyModel.query(..., condition=MyModel.my_list[0] == 42)

  • Fix a warning about collections.abc deprecation (#782)

v4.3.2

  • Fix discrepancy between runtime and type-checker’s perspective of Index and derived types (#769)

  • Add ListAttribute.remove_indexes action for removing specific indexes from a ListAttribute (#754)

  • Type stub fixes:

    • Add missing parameters of Model.scan (#750)

    • Change Model.get’s hash_key parameter to be typed Any (#756)

  • Prevent integration tests from being packaged (#758)

  • Various documentation fixes (#762, #765, #766)

Contributors to this release:

v4.3.1

  • Fix Index.query and Index.scan typing regressions introduced in 4.2.0, which were causing false errors in type checkers

v4.3.0

  • Implement exponential backoff for batch writes (#728)

  • Avoid passing ‘PROVISIONED’ BillingMode for compatibility with some AWS AZs (#721)

  • On Python >= 3.3, use importlib instead of deprecated imp (#723)

  • Update in-memory object correctly on REMOVE update expressions (#741)

Contributors to this release:

v4.2.0

date

2019-10-17

This is a backwards compatible, minor release.

  • Add attributes_to_get parameter to Model.scan (#431)

  • Disable botocore parameter validation for performance (#711)

Contributors to this release:

v4.1.0

date

2019-10-17

This is a backwards compatible, minor release.

  • In the Model’s Meta, you may now provide an AWS session token, which is mostly useful for assumed roles (#700):

    sts_client = boto3.client("sts")
role_object = sts_client.assume_role(RoleArn=role_arn, RoleSessionName="role_name", DurationSeconds=BOTO3_CLIENT_DURATION)
role_credentials = role_object["Credentials"]

class MyModel(Model):
  class Meta:
    table_name = "table_name"
    aws_access_key_id = role_credentials["AccessKeyId"]
    aws_secret_access_key = role_credentials["SecretAccessKey"]
    aws_session_token = role_credentials["SessionToken"]

  hash = UnicodeAttribute(hash_key=True)
  range = UnicodeAttribute(range_key=True)

  • Fix warning about inspect.getargspec (#701)

  • Fix provisioning GSIs when using pay-per-request billing (#690)

  • Suppress Python 3 exception chaining when “re-raising” botocore errors as PynamoDB model exceptions (#705)

Contributors to this release:

v4.0.0

date

2019-04-10

This is major release and contains breaking changes. Please read the notes below carefully.

Requests Removal

Given that botocore has moved to using urllib3 directly for making HTTP requests, we’ll be doing the same (via botocore). This means the following:

  • The session_cls option is no longer supported.

  • The request_timeout_seconds parameter is no longer supported. connect_timeout_seconds and read_timeout_seconds are available instead.

    • Note that the timeouts for connection and read are now 15 and 30 seconds respectively. This represents a change from the previous 60 second combined requests timeout.

  • Wrapped exceptions (i.e exc.cause) that were from requests.exceptions will now be comparable ones from botocore.exceptions instead.

Key attribute types must match table

The previous release would call DescribeTable to discover table metadata and would use the key types as defined in the DynamoDB table. This could obscure type mismatches e.g. where a table’s hash key is a number (N) in DynamoDB, but defined in PynamoDB as a UnicodeAttribute.

With this release, we’re always using the PynamoDB model’s definition of all attributes including the key attributes.

Deprecation of old APIs

Support for Legacy Conditional Parameters has been removed. See a complete list of affected Model methods below:

Method

Changes

update_item

removed in favor of update

rate_limited_scan

removed in favor of scan and ResultIterator

delete

conditional_operator and **expected_values kwargs removed. Use condition instead.

update

attributes, conditional_operator and **expected_values kwargs removed. Use actions and condition instead.

save

conditional_operator and **expected_values kwargs removed. Use condition instead.

count

**filters kwargs removed. Use range_key_condition/filter_condition instead.

query

conditional_operator and **filters kwargs removed. Use range_key_condition/filter_condition instead.

scan

  • conditional_operator and **filters kwargs removed. Use filter_condition instead.

  • allow_rate_limited_scan_without_consumed_capacity was removed

When upgrading, pay special attention to use of **filters and **expected_values, as you’ll need to check for arbitrary names that correspond to attribute names. Also keep an eye out for kwargs like user_id__eq=5 or email__null=True, which are no longer supported. A type check can help you catch cases like these.

New features in this release:

  • Support for transactions (TransactGet and TransactWrite) (#618)

  • Support for versioned optimistic locking (#664)

Other changes in this release:

  • Python 2.6 is no longer supported. 4.x.x will be the last major release to support Python 2.7 given the upcoming EOL.

  • Added the max_pool_connection and extra_headers settings to replace common use cases for session_cls

  • Added support for moto through implementing the botocore “before-send” hook.

  • Performance improvements to UTCDateTimeAttribute deserialization. (#610)

  • The MapAttributeMeta class has been removed. Now type(MapAttribute) == AttributeContainerMeta.

  • Removed LegacyBooleanAttribute and the read-compatibility for it in BooleanAttribute.

  • None can now be used to bootstrap condition chaining (#653)

  • Allow specifying timedeltas in expressions involving TTLAttributes (#665)

v3.4.1

date

2019-06-28

This is a backwards compatible, minor release.

Changes in this release:

  • Fix type stubs to include new methods and parameters introduced with time-to-live support

v3.4.0

date

2019-06-13

This is a backwards compatible, minor release.

Changes in this release:

  • Adds a TTLAttribute that specifies when items expire (#259)

  • Enables time-to-live on a DynamoDB table if the corresponding model has a TTLAttribute

  • Adds a default_for_new parameter for Attribute which is a default that applies to new items only

Contributors to this release:

v3.3.3

date

2019-01-15

This is a backwards compatible, minor release.

Fixes in this release:

  • Legacy boolean attribute migration fix. (#538)

  • Correctly package type stubs. (#585)

Contributors to this release:

v3.3.2

date

2019-01-03

This is a backwards compatible, minor release.

Changes in this release:

  • Built-in support for mypy type stubs, superseding those in python/typeshed. (#537)

v3.3.1

date

2018-08-30

This is a backwards compatible, minor bug fix release.

Fixes in this release:

  • Clearer error message on missing consumed capacity during rate-limited scan. (#506)

  • Python 3 compatibility in PageIterator. (#535)

  • Proxy configuration changes in botocore>=1.11.0. (#531)

Contributors to this release:

v3.3.0

date

2018-05-09

This is a backwards compatible, major bug fix release.

New features in this release:

  • Support scan operations on secondary indexes. (#141, #392)

  • Support projections in model get function. (#337, #403)

  • Handle values from keys when batch get returns unprocessed keys. (#252, #376)

  • Externalizes AWS Credentials. (#426)

  • Add migration support for LegacyBooleanAttribute. (#404, #405)

  • Rate limited Page Iterator. (#481)

Fixes in this release:

  • Thread-safe client creation in botocore. (#153, #393)

  • Use attr.get_value(value) when deserialize. (#450)

  • Skip null attributes post serialization for maps. (#455)

  • Fix deserialization bug in BinaryAttribute and BinarySetAttribute. (#459, #480)

  • Allow MapAttribute instances to be used as the RHS in expressions. (#488)

  • Return the correct last_evaluated_key for limited queries/scans. (#406, #410)

  • Fix exclusive_start_key getting lost in PageIterator. (#421)

  • Add python 3.5 for Travis ci builds. (#437)

Contributors to this release:

v3.2.1

date

2017-10-25

This is a backwards compatible, minor bug fix release.

Removed features in this release:

  • Remove experimental Throttle api. (#378)

Fixes in this release:

  • Handle attributes that cannot be retrieved by getattr. Fixes #104 (#385)

  • Model.refresh() should reset all model attribuets. Fixes #166 (#388)

  • Model.loads() should deserialize using custom attribute names. Fixes #168 (#387)

  • Deserialize hash key during table loads. Fixes #143 (#386)

  • Support pagination in high-level api query and scan methods. Fixes #50, #118, #207, and #248 (#379)

  • Don’t serialize null nested attributed. Fixes #240 and #309 (#375)

  • Legacy update item subset removal using DELETE operator. Fixes #132 (#374)

Contributors to this release:

v3.2.0

date

2017-10-13

This is a backwards compatible, minor release.

This release updates PynamoDB to interact with Dynamo via the current version of Dynamo’s API. Condition and update expressions can now be created from attributes and used in model operations. Legacy filter and attribute update keyword arguments have been deprecated. Using these arguments will cause a warning to be logged.

New features in this release:

  • Add support for current version of DynamoDB API

  • Improved MapAttribute item assignment and access.

Contributors to this release:

v3.2.0rc2

date

2017-10-09

This is a backwards compatible, release candidate.

This release candidate allows dereferencing raw MapAttributes in condition expressions. It also improves MapAttribute assignment and access.

Contributors to this release:

v3.2.0rc1

date

2017-09-22

This is a backwards compatible, release candidate.

This release candidate updates PynamoDB to interact with Dynamo via the current version of Dynamo’s API. It deprecates some internal methods that were used to interact with Dynamo that are no longer relevant. If your project was calling those low level methods a warning will be logged.

New features in this release:

  • Add support for current version of DynamoDB API

Contributors to this release:

v3.1.0

date

2017-07-07

This is a backwards compatible, minor release.

Note that we now require botocore>=1.2.0; this is required to support the consistent_read parameter when scanning.

Calling Model.count() without a hash_key and with filters will raise a ValueError, as it was previously returning incorrect results.

New features in this release:

  • Add support for signals via blinker (#278)

Fixes in this release:

  • Pass batch parameters down to boto/dynamo (#308)

  • Raise a ValueError if count() is invoked with no hash key AND filters (#313)

  • Add consistent_read parameter to Model.scan (#311)

Contributors to this release:

v3.0.1

date

2017-06-09

This is a major release with breaking changes.

MapAttribute now allows pythonic access when recursively defined. If you were not using the attr_name= kwarg then you should have no problems upgrading. Previously defined non subclassed MapAttributes (raw MapAttributes) that were members of a subclassed MapAttribute (typed MapAttributes) would have to be accessed like a dictionary. Now object access is possible and recommended. Access via the attr_name, also known as the DynamoDB name, will now throw an AttributeError.

UnicodeSetAttributes do not json serialize or deserialize anymore. We deprecated the functionality of json serializing as of 1.6.0 but left the deserialization functionality in there so people could migrate away from the old functionality. If you have any UnicodeSetAttributes that have not been persisted since version 1.6.0 you will need to migrate your data or manage the json encoding and decoding with a custom attribute in application.

  • Performance enhancements for the UTCDateTimeAttribute deserialize method. (#277)

  • There was a regression with attribute discovery. Fixes attribute discovery for model classes with inheritance (#280)

  • Fix to ignore null checks for batch delete (#283)

  • Fix for ListAttribute and MapAttribute serialize (#286)

  • Fix for MapAttribute pythonic access (#292) This is a breaking change.

  • Deprecated the json decode in UnicodeSetAttribute (#294) This is a breaking change.

  • Raise TableDoesNotExist error instead of letting json decoding ValueErrors raise (#296)

Contributors to this release:

v2.2.0

date

2017-10-25

This is a backwards compatible, minor release.

The purpose of this release is to prepare users to upgrade to v3.0.1+ (see issue #377 for details).

Pull request #294 removes the backwards compatible deserialization of UnicodeSetAttributes introduced in #151.

This release introduces a migration function on the Model class to help re-serialize any data that was written with v1.5.4 and below.

Temporary feature in this release:

  • Model.fix_unicode_set_attributes() migration helper

  • Model.needs_unicode_set_fix() migration helper

v2.1.6

date

2017-05-10

This is a backwards compatible, minor release.

Fixes in this release:

  • Replace Delorean with dateutil (#208)

  • Fix a bug with count – consume all pages in paginated response (#256)

  • Update mock lib (#262)

  • Use pytest instead of nose (#263)

  • Documentation changes (#269)

  • Fix null deserialization in MapAttributes (#272)

Contributors to this release:

v2.1.5

date

2017-03-16

This is a backwards compatible, minor release.

Fixes in this release:

  • Apply retry to ProvisionedThroughputExceeded (#222)

  • rate_limited_scan fix to handle consumed capacity (#235)

  • Fix for test when dict ordering differs (#237)

Contributors to this release:

v2.1.4

date

2017-02-14

This is a minor release, with some changes to MapAttribute handling. Previously, when accessing a MapAttribute via item.attr, the type of the object used during instantiation would determine the return value. Model(attr={…}) would return a dict on access. Model(attr=MapAttribute(…)) would return an instance of MapAttribute. After #223, a MapAttribute will always be returned during item access regardless of the type of the object used during instantiation. For convenience, a dict version can be accessed using .as_dict() on the MapAttribute.

New features in this release:

  • Support multiple attribute update (#194)

  • Rate-limited scan (#205)

  • Always create map attributes when setting a dict (#223)

Fixes in this release:

  • Remove AttributeDict and require explicit attr names (#220)

  • Add distinct DoesNotExist classes per model (#206)

  • Ensure defaults are respected for MapAttribute (#221)

  • Add docs for GSI throughput changes (#224)

Contributors to this release:

v2.0.3

date

2016-11-18

This is a backwards compatible, minor release.

Fixes in this release:

  • Allow longs as members of maps + lists in python 2 (#200)

  • Allow raw map attributes in subclassed map attributes (#199)

Contributors to this release:

v2.0.2

date

2016-11-10

This is a backwards compatible, minor release.

Fixes in this release:

  • add BOOL into SHORT_ATTR_TYPES (#190)

  • deserialize map attributes correctly (#192)

  • prepare request with requests session so session properties are applied (#197)

Contributors to this release:

v2.0.1

date

2016-11-04

This is a backwards compatible, minor release.

Fixes in this release:

  • make “unprocessed keys for batch operation” log at info level (#180)

  • fix RuntimeWarning during imp_load in custom settings file (#185)

  • allow unstructured map attributes (#186)

Contributors to this release:

v2.0.0

date

2016-11-01

This is a major release, which introduces support for native DynamoDB maps and lists. There are no changes which are expected to break backwards compatibility, but you should test extensively before upgrading in production due to the volume of changes.

New features in this release:

  • Add support for native map and list attributes (#175)

Contributors to this release:

v1.6.0

date

2016-10-20

This is a minor release, with some changes to BinaryAttribute handling and new options for configuration.

BooleanAttribute now uses the native API type “B”. BooleanAttribute is also compatible with the legacy BooleanAttributes on read. On save, they will be rewritten with the native type. If you wish to avoid this behavior, you can continue to use LegacyBooleanAttribute. LegacyBooleanAttribute is also forward compatible with native boolean attributes to allow for migration.

New features in this release:

  • Add support for native boolean attributes (#149)

  • Parse legacy and native bool in legacy bool (#158)

  • Allow override of settings from global configuration file (#147)

Fixes in this release:

  • Serialize UnicodeSetAttributes correctly (#151)

  • Make update_item respect attr_name differences (#160)

Contributors to this release:

v1.5.4

date

2017-10-25

This is a backwards compatible, minor bug fix release.

The purpose of this release is to prepare users to upgrade to v1.6.0+ (see issue #377 for details).

Pull request #151 introduces a backwards incompatible change to how UnicodeSetAttributes are serialized. While the commit attempts to provide compatibility by deserializing values written with v1.5.3 and below, it prevents users from upgrading because it starts writing non JSON-encoded values to dynamo.

Anyone using UnicodeSetAttribute must first deploy this version.

Fixes in this release:

  • Backport UnicodeSetAttribute deserialization code from #151

v1.5.3

date

2016-08-08

This is a backwards compatible, minor release.

Fixes in this release:

  • Introduce concept of page_size, separate from num items returned limit (#139)

Contributors to this release:

v1.5.2

date

2016-06-23

This is a backwards compatible, minor release.

Fixes in this release:

  • Additional retry logic for HTTP Status Code 5xx, usually attributed to InternalServerError (#135)

Contributors to this release:

v1.5.1

date

2016-05-11

This is a backwards compatible, minor release.

Fixes in this release:

  • Fix for binary attribute handling of unprocessed items data corruption affecting users of 1.5.0 (#126 fixes #125)

Contributors to this release:

v1.5.0

date

2016-05-09

This is a backwards compatible, minor release.

Please consider the fix for limits before upgrading. Correcting for off-by-one when querying is no longer necessary.

Fixes in this release:

  • Fix off-by-one error for limits when querying (#123 fixed #95)

  • Retry on ConnectionErrors and other types of RequestExceptions (#121 fixes #98)

  • More verbose logging when receiving errors e.g. InternalServerError from the DynamoDB API (#115)

  • Prevent permanent poisoning of credential cache due to botocore bug (#113 fixes #99)

  • Fix for UnprocessedItems serialization error (#114 fixes #103)

  • Fix parsing issue with newer version of dateutil and UTCDateTimeAttributes (#110 fixes #109)

  • Correctly handle expected value generation for set types (#107 fixes #102)

  • Use HTTP proxies configured by botocore (#100 fixes #92)

New features in this release:

  • Return the cause of connection exceptions to the caller (#108 documented by #112)

  • Configurable session class for custom connection pool size, etc (#91)

  • Add attributes_to_get and consistent_read to more of the API (#79)

Contributors to this release:

v1.4.4

date

2015-11-10

This is a backward compatible, minor release.

Changes in this release:

  • Support for enabling table streams at table creation time (thanks to @brln)

  • Fixed bug where a value was always required for update_item when action was ‘delete’ (#90)

v1.4.3

date

2015-10-12

This is a backward compatible, minor release. Included are bug fixes and performance improvements.

A huge thank you to all who contributed to this release:

  • Daniel Hochman

  • Josh Owen

  • Keith Mitchell

  • Kevin Wilson

Changes in this release:

  • Fixed bug where models without a range key weren’t handled correctly

  • Botocore is now only used for preparing requests (for performance reasons)

  • Removed the dependency on OrderedDict

  • Fixed bug for zope interface compatibility (#71)

  • Fixed bug where the range key was handled incorrectly for integer values

v1.4.2

date

2015-06-26

This is a backward compatible, minor bug fix release.

Bugs fixed in this release:

  • Fixed bug where botocore exceptions were not being reraised.

v1.4.1

date

2015-06-26

This is a backward compatible, minor bug fix release.

Bugs fixed in this release:

  • Fixed bug where a local variable could be unbound (#67).

v1.4.0

date

2015-06-23

This is a minor release, with backward compatible bug fixes.

Bugs fixed in this release:

  • Added support for botocore 1.0.0 (#63)

  • Fixed bug where Model.get() could fail in certain cases (#64)

  • Fixed bug where JSON strings weren’t being encoded properly (#61)

v1.3.7

date

2015-04-06

This is a backward compatible, minor bug fix release.

Bugs fixed in this release:

  • Fixed bug where range keys were not included in update_item (#59)

  • Fixed documentation bug (#58)

v1.3.6

date

2015-04-06

This is a backward compatible, minor bug fix release.

Bugs fixed in this release:

  • Fixed bug where arguments were used incorrectly in update_item (#54)

  • Fixed bug where falsy values were used incorrectly in model constructors (#57), thanks @pior

  • Fixed bug where the limit argument for scan and query was not always honored.

New features:

  • Table counts with optional filters can now be queried using Model.count(**filters)

v1.3.5

This is a backward compatible, minor bug fix release.

Bugs fixed in this release.

  • Fixed bug where scan did not properly limit results (#45)

  • Fixed bug where scan filters were not being preserved (#44)

  • Fixed bug where items were mutated as an unexpected side effect (#47)

  • Fixed bug where conditional operator wasn’t used in scan

v1.3.4

date

2014-10-06

This is a backward compatible, minor bug fix release.

Bugs fixed in this release.

  • Fixed bug where attributes could not be used in multiple indexes when creating a table.

  • Fixed bug where a dependency on mock was accidentally introduced.

v1.3.3

date

2014-9-18

This is a backward compatible, minor bug fix release, fixing the following issues

  • Fixed bug with Python 2.6 compatibility (#28)

  • Fixed bug where update_item was incorrectly checking attributes for null (#34)

Other minor improvements

v1.3.2

date

2014-7-02

  • This is a minor bug fix release, fixing a bug where query filters were incorrectly parsed (#26).

v1.3.1

date

2014-05-26

  • This is a bug fix release, ensuring that KeyCondition and QueryFilter arguments are constructed correctly (#25).

  • Added an example URL shortener to the examples.

  • Minor documentation fixes.

v1.3.0

date

2014-05-20

  • This is a minor release, with new backward compatible features and bug fixes.

  • Fixed bug where NULL and NOT_NULL were not set properly in query and scan operations (#24)

  • Support for specifying the index_name as a Index.Meta attribute (#23)

  • Support for specifying read and write capacity in Model.Meta (#22)

v1.2.2

date

2014-05-14

  • This is a minor bug fix release, resolving #21 (key_schema ordering for create_table).

v1.2.1

date

2014-05-07

  • This is a minor bug fix release, resolving #20.

v1.2.0

date

2014-05-06

v1.1.0

date

2014-04-14

  • PynamoDB now requires botocore version 0.42.0 or greater

  • Improved documentation

  • Minor bug fixes

  • New API endpoint for deleting model tables

  • Support for expected value conditions in item delete, update, and save

  • Support for limit argument to queries

  • Support for aliased attribute names

Example of using aliased attribute names:

class AliasedModel(Model):
    class Meta:
        table_name = "AliasedModel"
    forum_name = UnicodeAttribute(hash_key=True, attr_name='fn')
    subject = UnicodeAttribute(range_key=True, attr_name='s')

v1.0.0

date

2014-03-28

  • Major update: New syntax for specifying models that is not backward compatible.

Important

The syntax for models has changed!

The old way:

from pynamodb.models import Model
from pynamodb.attributes import UnicodeAttribute


class Thread(Model):
    table_name = 'Thread'
    forum_name = UnicodeAttribute(hash_key=True)

The new way:

from pynamodb.models import Model
from pynamodb.attributes import UnicodeAttribute


class Thread(Model):
    class Meta:
        table_name = 'Thread'
    forum_name = UnicodeAttribute(hash_key=True)

Other, less important changes:

  • Added explicit support for specifying the server hostname in models

  • Added documentation for using DynamoDB Local and dynalite

  • Made examples runnable with DynamoDB Local and dynalite by default

  • Added documentation for the use of default and null on model attributes

  • Improved testing for index queries

v0.1.13

date

2014-03-20

  • Bug fix release. Proper handling of update_item attributes for atomic item updates, with tests. Fixes #7.

v0.1.12

date

2014-03-18

  • Added a region attribute to model classes, allowing users to specify the AWS region, per model. Fixes #6.

v0.1.11

date

2014-02-26

  • New exception behavior: Model.get and Model.refresh will now raise DoesNotExist if the item is not found in the table.

  • Correctly deserialize complex key types. Fixes #3

  • Correctly construct keys for tables that don’t have both a hash key and a range key in batch get operations. Fixes #5

  • Better PEP8 Compliance

  • More tests

  • Removed session and endpoint caching to avoid using stale IAM role credentials