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Python client for the G Adventures REST API

Project description

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A client for the G Adventures REST API (https://developers.gadventures.com)

Quick Start

>>> from gapipy import Client
>>> api = Client(application_key='MY_SECRET_KEY')

>>> # Get a resource by id
>>> tour = api.tours.get(24309)
>>> tour.product_line
u'AHEH'
>>> tour.departures.count()
134
>>> dossier = tour.tour_dossier
>>> dossier.name
u'Essential India'
>>> itinerary = dossier.structured_itineraries[0]
>>> {day.day: day.summary for day in itinerary.days[:3]}
{1: u'Arrive at any time. Arrival transfer included through the G Adventures-supported Women on Wheels project.',
2: u'Take a morning walk through the city with a young adult from the G Adventures-supported New Delhi Streetkids Project. Later, visit Old Delhi, explore the spice markets, and visit Jama Masjid and Connaught Place.',
3: u"Arrive in Jaipur and explore this gorgeous 'pink city'."}

>>> # Create a new resource
>>> booking = api.bookings.create({'currency': 'CAD', 'external_id': 'abc'})

>>> # Modify an existing resource
>>> booking.external_id = 'def'
>>> booking.save()

Resources

Resource objects are instantiated from python dictionaries created from JSON data. The fields are parsed and converted to python objects as specified in the resource class.

A nested resource will only be instantiated when its corresponding attribute is accessed in the parent resource. These resources may be returned as a stub, and upon access of an attribute not present, will internally call .fetch() on the resource to populate it.

A field pointing to the URL for a collection of a child resources will hold a Query object for that resource. As for nested resources, it will only be instantiated when it is first accessed.

Queries

A Query for a resource can be used to fetch resources of that type (either a single instance or an iterator over them, possibly filtered according to some conditions). Queries are roughly analogous to Django’s QuerySets.

An API client instance has a query object for each available resource (accessible by an attribute named after the resource name)

Methods on Query objects

All queries support the get and create methods. The other methods are only supported for queries whose resources are listable.

get(resource_id)

Get a single resource.

create(data)

Create an instance of the query resource using the given data.

all([limit=n])

Generator over all resources in the current query. If limit is a positive integer n, then only the first n results will be returned.

filter(field1=value1, [field2=value2, ...])

Filter resources on the provided fields and values. Calls to filter can be chained.

count()

Return the number of resources in the current query (by reading the count field on the response returned by requesting the list of resources in the current query).

Caching

gapipy can be configured to use a cache to avoid having to send HTTP requests for resources it has already seen. Cache invalidation is not automatically handled: it is recommended to listen to G API webhooks to purge resources that are outdated.

By default, gapipy will use the cached data to instantiate a resource, but a fresh copy can be fetched from the API by passing cached=False to Query.get. This has the side-effect of recaching the resource with the latest data, which makes this a convenient way to refresh cached data.

Caching can be configured through the cache_backend and cache_options settings. cached_backend should be a string of the fully qualified path to a cache backend, i.e. a subclass of gapipy.cache.BaseCache. A handful of cache backends are available out of the box:

  • gapipy.cache.SimpleCache

    A simple in-memory cache for single process environments and is not thread safe.

  • gapipy.cache.RedisCache

    A key-value cache store using Redis as a backend.

  • gapipy.cache.NullCache (Default)

    A cache that doesn’t cache.

Since the cache backend is defined by a python module path, you are free to use a cache backend that is defined outside of this project.

Connection Pooling

We use the requests library, and you can take advantage of the provided connection pooling options by passing in a 'connection_pool_options' dict to your client.

Values inside the 'connection_pool_options' dict of interest are as follows:

  • Set enable to True to enable pooling. Defaults to False.

  • Use number to set the number of connection pools to cache. Defaults to 10.

  • Use maxsize to set the max number of connections in each pool. Defaults to 10.

  • Set block to True if the connection pool should block and wait for a connection to be released when it has reached maxsize. If False and the pool is already at maxsize a new connection will be created without blocking, but it will not be saved once it is used. Defaults to False.

See also:

Dependencies

The only dependency needed to use the client is requests.

Testing

Running tests is pretty simple. We use nose as the test runner. You can install all requirements for testing with the following:

$ pip install -r requirements-testing.txt

Once installed, run unit tests with:

$ nosetests -A integration!=1

Otherwise, you’ll want to include a GAPI Application Key so the integration tests can successfully hit the API:

$ export GAPI_APPLICATION_KEY=MY_SECRET_KEY; nosetests

Thanks for helping!

History

2.2.0 (2016-05-17)

  • Added transactional_email, and emails to Agency resource.

2.1.2 (2016-05-17)

  • Added audience to Invoice resource.

2.1.1 (2016-04-29)

  • Removed invalid field, email from AgencyChain

2.1.0 (2016-04-25)

  • Added new resource, AgencyChain

2.0.0 (2016-03-11)

The global reference to the last instantiated Client has been removed. It is now mandatory to pass in a Client instance when instantiating a Model or Resource.

In practice, this should not introduce too much changes in codebases that are using gapipy, since resources are mostly interacted with through a Client instance (for example, api.tours.get(123), or api.customers.create({...})), instead of being instantiated independently. The one possible exception is unit testing: in that case, Client.build can be useful.

The global variable was causing issues with connection pooling when multiple client with different configurations were used at the same time.

1.1.0 (2016-03-11)

  • Added new resource, DossierFeature

1.0.0 (2016-02-29)

  • Adopted Semantic Versioning for this project.

  • Refactored how the cache key is set. This is a breaking change for any modules that implemented their own cache interface. The cache modules are no longer responsible for defining the cache value, but simply storing whatever it is given into cache. The Query object now introduces a query_key function which generates the cache key sent to the cache modules.

0.6.3 (2016-01-21)

  • Added better error handling to Client.build. An AttributeError raised when instantiating a resource won’t be shadowed by the except block anymore.

0.6.2 (2016-01-20)

  • Fixed a regression bug when initializing DepartureServiceRoom model.

0.6.1 (2016-01-20)

  • Fixed a regression bug when initializing services.

0.6.0 (2016-01-20)

  • Fixed a bug when initializing list of resources.

0.5.5 (2016-01-08)

  • Added a component of type ACCOMMODATION to Itineraries.

0.5.4 (2016-01-04)

  • Added associated_services to SingleSupplementService

0.5.3 (2015-12-31)

  • Added name to Departure.

  • Happy New Year!

0.5.2 (2015-12-15)

  • Added variation_id to BaseCache to fix a TypeError when using the NullCache

0.5.1 (2015-12-14)

  • Add associated_agency to bookings resource

0.5.0 (2015-12-10)

  • Minor adjusted in Query internals to ensure the variation_id of an Itinerary is handled properly.

  • Added ItineraryHighlights and ItineraryMedia resources. These are sub resources of the Itinerary

0.4.6 (2015-12-09)

  • Added connection pool caching to RedisCache. Instances of gapipy with the same cache settings (in the same Python process) will share a connection pool.

0.4.5 (2015-11-05)

  • Added code field to the type of an Itinerary’s listed details.

0.4.4 (2015-11-04)

  • Added the details field to the Itinerary resource – a list of textual details about an itinerary.

0.4.3 (2015-11-03)

  • Added the tour_dossier field to the Itinerary resource.

0.4.2 (2015-10-28)

  • Fixed a bug that would cause amount when looking at Promotion objects in the Departure to be removed from the data dict.

0.4.1 (2015-10-16)

  • Moved an import of requests down from the module level. Fixes issues in CI environments.

0.4.0 (2015-10-13)

  • Added connection pooling options, see docs for details on connection_pool_options.

0.3.0 (2015-09-24)

  • Modified how the Promotion object is loaded within price_bands on a Departure. It now correctly captures the amount field.

0.2.0 (2015-09-15)

  • Modified objects within cache module to handle variation_id, which is exposed within the Itinerary object. Previously, the Itinerary would not be correctly stored in cache with its variant reference.

0.1.51 (2015-08-31)

  • Added the components field to the Departure resource.

0.1.50 (2015-07-28)

  • Fixed an issue with the default gapipy.cache.NullCache when is_cached was used.

0.1.49 (2015-07-23)

  • Added new fields to Itinerary revolving around variations.

  • Added declined_reason to all service resources.

0.1.48 (2015-07-15)

  • Add DeclinedReason resource

0.1.47 (2015-07-08)

  • Fixed a bug in APIRequestor.get. Requesting a resource with with an id of 0 won’t raise an Exception anymore.

0.1.46 (2015-06-10)

  • Added associated_services and original_departure_service to various service resources and departure_services model respectively.

0.1.45 (2015-05-27)

  • Fixed products within the Promotion resource to properly retain type and sub_type fields after being parsed into a dictionary.

0.1.44 (2015-05-22)

  • Changed default cache_backend to use gapipy.cache.NullCache. Previously, SimpleCache was the default and led to confusion in production environments, specifically as to why resources were not matching the API output. Now, by default, to get any caching from gapipy you must explicitly set it.

0.1.43 (2015-04-29)

  • Fixed Place init with empty admin_divisions

0.1.42 (2015-04-29)

  • Added description to TourCategory resource.

0.1.41 (2015-04-14)

0.1.40 (2015-04-06)

  • Added deposit to DepartureService model

0.1.39 (2015-03-31)

  • Refactor APIRequestor._request. While this should not change existing functionality, it is now possible to override specific methods on APIRequestor if needed.

0.1.38 (2015-03-23)

  • Fixed: Due to inconsistencies in the G API with regards to nested resources, the fetch function was modified to use the raw data from the API, rather than a specific set of allowed fields.

0.1.37 (2015-03-23)

  • Fixed: Iterating over products within the promotions object now works as expected. Previously, accessing the products attribute would result in a Query object with incorrect parameters.

0.1.36 (2015-03-17)

  • Support free to amount price range formatting (e.g. Free-10CAD)

0.1.35 (2015-03-12)

  • Added duration_min & duration_max to ActivityDossier model

0.1.34 (2015-03-11)

  • Added OptionalActivity model

  • All Dossiers with details: * Now represented as list of DossierDetail models * Added convenience methods for retrieving specific details

  • ItineraryComponent and ActivityDossier use new Duration model for their duration field/property

  • Added duration_label and location_label to ItineraryComponent

  • Added duration_label, price_per_person_label, and price_per_group_label to ActivityDossier

0.1.33 (2015-03-02)

  • Added name field to the Itinerary resource.

0.1.32 (2015-02-18)

  • Changed cache key creation to account for GAPI_LANGUAGE when the environment variable is set.

0.1.31 (2015-02-18)

  • Fixed a bug when setting _resource_fields in DepartureService resource

0.1.30 (2015-02-11)

  • TourDossier.structured_itineraries now refers to a list of Itinerary resources

0.1.29 (2015-02-10)

  • Added TransportDossier and Itinerary resources.

  • The reference to the itinerary in a DepartureService is now a full-fledged Itinerary resource.

0.1.28 (2015-01-22)

  • Bug fix to correctly send Content-Type: application/json in POST, PUT, or PATCH.

0.1.27 (2015-01-19)

  • Update DepartureService object to contain a reference to its Itinerary

0.1.26 (2015-01-14)

  • Normalize API request headers, to promote caching.

0.1.25 (2015-01-09)

  • Added ActivityDossier and AccommodationDossier resources, as well as references to it from Activity and Accommodation.

0.1.24 (2015-01-07)

  • Added PlaceDossier resource, as well as reference to it from Place

0.1.22 (2014-12-12)

  • Added advertised_departures to TourDossier

0.1.21 (2014-11-26)

  • Fixed a bug with promotions on a Price object. When promotions were accessed, gapipy would query for all promotions, rather than returning the inline list.

0.1.20 (2014-11-20)

  • Departure resource is now listable via filters.

0.1.19 (2014-11-17)

  • Fixed a bug with RedisCache.is_cached where it would not use the set key_prefix when checking for existence in cache. Effectively, it would always return False

0.1.18 (2014-11-12)

  • When setting a date_field, initiate it as a datetime.date type.

0.1.17 (2014-11-07)

  • Deprecated RedisHashCache from cache backends available by default. Was not well tested or reliable.

0.1.16 (2014-10-28)

  • Fixed a bug where if a model field received null as a value, it would fail. Now,

    if the result is null, the model field will have an appropriate None value.

0.1.15 (2014-10-23)

  • Fix a bug in the DepartureRoom model. The price_bands attribute is now properly set.

0.1.14 (2014-10-22)

  • Fixed a bug where AgencyDocument was not included in the code base.

0.1.13 (2014-10-21)

  • Add latitude, longitude, and documents to the Agency resource.

0.1.12 (2014-10-20)

  • date_created on the Agency resource is correctly parsed as a local time.

0.1.11 (2014-10-15)

  • Improve the performance of Resource.fetch by handling cache get/set.

0.1.10 (2014-10-09)

  • Fix a bug in AccommodationRoom price bands. The season_dates and blackout_dates attributes are now properly set.

0.1.9 (2014-09-23)

  • Add iso_639_3 and iso_639_1 to Language

0.1.8 (2014-09-17)

  • Remove the add_ons field in Departure, and add addons.

0.1.7 (2014-08-22)

  • Fix a bug when initializing AccommodationRoom from cached data.

0.1.6 (2014-08-19)

  • Add Query.purge_cached

0.1.5 (2014-07-29)

  • Add details field to the list of incomplete_requirements in a DepartureService.

0.1.4 (2014-07-21)

  • Removed sending of header X-HTTP-Method-Override: PATCH when the update command is called. Now, when .save(partial=True) is called, the correct PATCH HTTP method will be sent with the request.

0.1.3 (2014-07-18)

  • Return None instead of raising a HTTPError 404 exception when fetching a non-existing resource by id.

  • Added ability to create resources from the Query objects on the client instance (for example, api.customers.create({'name': {'legal_first_name': 'Pat', ...}, ...}))

0.1.2 (2014-07-14)

  • Added Query.is_cached

  • Added cache options

0.1.1 (2014-06-27)

  • Use setuptools find_packages

0.1.0 (2014-06-20)

  • First release on PyPI.

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