Package repository: https://github.com/qvantel/jsonapi-client
This Python (3.6+) library provides easy-to-use, pythonic, ORM-like access to JSON API ( http://jsonapi.org )
- Optional asyncio implementation
- Optional model schema definition and validation (=> easy reads even without schema)
- Resource caching within session
From Pypi:
pip install jsonapi-clientOr from sources:
./setup.py installfrom jsonapi_client import Session, Filter, ResourceTuple
s = Session('http://localhost:8080/')
# To start session in async mode
s = Session('http://localhost:8080/', enable_async=True)
# You can also pass extra arguments that are passed directly to requests or aiohttp methods,
# such as authentication object
s = Session('http://localhost:8080/',
request_kwargs=dict(auth=HTTPBasicAuth('user', 'password'))
# You can also use Session as a context manager. Changes are committed in the end
# and session is closed.
with Session(...) as s:
your code
# Or with enable_async=True
async with Session(..., enable_async=True):
your code
# If you are not using context manager, you need to close session manually
s.close()
# Again, don't forget to await in the AsyncIO mode
await s.close()
# Fetching documents
documents = s.get('resource_type')
# Or if you want only 1, then
documents = s.get('resource_type', 'id_of_document')
# AsyncIO the same but remember to await:
documents = await s.get('resource_type')# You need first to specify your filter instance.
# - filtering with two criteria (and)
filter = Filter(attribute='something', attribute2='something_else')
# - filtering some-dict.some-attr == 'something'
filter = Filter(some_dict__some_attr='something'))
# Same thing goes for including.
# - including two fields
include = Inclusion('related_field', 'other_related_field')
# Custom syntax for request parameters.
# If you have different URL schema for filtering or other GET parameters,
# you can implement your own Modifier class (derive it from Modifier and
# reimplement appended_query).
modifier = Modifier('filter[post]=1&filter[author]=2')
# All above classes subclass Modifier and can be added to concatenate
# parameters
modifier_sum = filter + include + modifier
# Now fetch your document
filtered = s.get('resource_type', modifier_sum) # AsyncIO with await
# To access resources included in document:
r1 = document.resources[0] # first ResourceObject of document.
r2 = document.resource # if there is only 1 resource we can use this# Pagination links can be accessed via Document object.
next_doc = document.links.next.fetch()
# AsyncIO
next_doc = await document.links.next.fetch()
# Iteration through results (uses pagination):
for r in s.iterate('resource_type'):
print(r)
# AsyncIO:
async for r in s.iterate('resource_type'):
print(r)# - attribute access
attr1 = r1.some_attr
nested_attr = r1.some_dict.some_attr
# Attributes can always also be accessed via __getitem__:
nested_attr = r1['some-dict']['some-attr']
# If there is namespace collision, you can also access attributes via .fields proxy
# (both attributes and relationships)
attr2 = r1.fields.some_attr
# - relationship access.
# * Sync, this gives directly ResourceObject
rel = r1.some_relation
attr3 = r1.some_relation.some_attr # Relationship attribute can be accessed directly
# * AsyncIO, this gives Relationship object instead because we anyway need to
# call asynchronous fetch function.
rel = r1.some_relation
# To access ResourceObject you need to first fetch content
await r1.some_relation.fetch()
# and then you can access associated resourceobject
res = r1.some_relation.resource
attr3 = res.some_attr # Attribute access through ResourceObject
# If you need to access relatinoship object itself (with sync API), you can do it via
# .relationships proxy. For example, if you are interested in links or metadata
# provided within relationship, or intend to manipulate relationship.
rel_obj = r1.relationships.relation_name# Updating / patching existing resources
r1.some_attr = 'something else'
# Patching element in nested json
r1.some_dict.some_dict.some_attr = 'something else'
# change relationships, to-many. Accepts also iterable of ResourceObjects/
# ResourceIdentifiers/ResourceTuples
r1.comments = ['1', '2']
# or if resource type is not known or can have multiple types of resources
r1.comments_or_people = [ResourceTuple('1', 'comments'), ResourceTuple('2', 'people')]
# or if you want to add some resources you can
r1.comments_or_people += [ResourceTuple('1', 'people')]
r1.commit()
# change to-one relationships
r1.author = '3' # accepts also ResourceObjects/ResourceIdentifiers/ResourceTuple
# or resource type is not known (via schema etc.)
r1.author = ResourceTuple('3', 'people')
# Committing changes (PATCH request)
r1.commit(meta={'some_meta': 'data'}) # Resource committing supports optional meta data
# AsyncIO
await r1.commit(meta={'some_meta': 'data'})# Creating new resources. Schema must be given. Accepts dictionary of schema models
# (key is model name and value is schema as json-schema.org).
models_as_jsonschema = {
'articles': {'properties': {
'title': {'type': 'string'},
'author': {'relation': 'to-one', 'resource': ['people']},
'comments': {'relation': 'to-many', 'resource': ['comments']},
}},
'people': {'properties': {
'first-name': {'type': 'string'},
'last-name': {'type': 'string'},
'twitter': {'type': ['null', 'string']},
}},
'comments': {'properties': {
'body': {'type': 'string'},
'author': {'relation': 'to-one', 'resource': ['people']}
}}
}
# If you type schema by hand, it could be more convenient to type it as yml in a file
# instead
s = Session('http://localhost:8080/', schema=models_as_jsonschema)
a = s.create('articles') # Creates empty ResourceObject of 'articles' type
a.title = 'Test title'
# Validates and performs POST request, and finally updates resource based on server response
a.commit(meta={'some_meta': 'data'})
# Or with AsyncIO, remember to await
await a.commit(meta={'some_meta': 'data'})
# Commit metadata could be also saved in advance:
a.commit_metadata = {'some_meta': 'data'}
# You can also commit all changed resources in session by
s.commit()
# or with AsyncIO
await s.commit()
# Another example of resource creation, setting attributes and relationships & committing:
# If you have underscores in your field names, you can pass them in fields keyword argument as
# a dictionary:
cust1 = s.create_and_commit('articles',
attribute='1',
dict_object__attribute='2',
to_one_relationship='3',
to_many_relationship=['1', '2'],
fields={'some_field_with_underscore': '1'}
)
# Async:
cust1 = await s.create_and_commit('articles',
attribute='1',
dict_object__attribute='2',
to_one_relationship='3',
to_many_relationship=['1', '2'],
fields={'some_field_with_underscore': '1'}
)- Work was supported by Qvantel (http://qvantel.com).
- Author and package maintainer: Tuomas Airaksinen (https://github.com/tuomas2/).
Copyright (c) 2017, Qvantel
All rights reserved.
Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met:
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- Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution.
- Neither the name of the Qvantel nor the names of its contributors may be used to endorse or promote products derived from this software without specific prior written permission.
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