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A Command Line Client

UNDER CONSTRUCTION

See jsonapi_demo_cli.

This client demonstrates a rudimentary Python command-line tool that interacts with our demo JSONAPI project.

It: 1. performs an OAuth 2.0 login to acquire the Bearer token. If the type of OAuth 2.0 grant requires a browser login, a browser window is opened to perform the login. 2. uses the jsonapi-requests library to do a few queries.

This demo client is overly complicated (I couldn't resist;-) as it automates the web browser popup and callback handling for the Authorization Code or Implicit grants. Below is a simplified description of the key stuff you will likely actually need to do if you are writing a "headless" backend client, probably to implement some sort of "batch" activities where the client backend is trusted (rather than needing an end-user to login).

Oauth 2.0 Login

The first step is to end up with a "bearer" Access Token that gets put into the Authorization header. Using oauthlib you first initialize the library, which differs based on the type of grant. You'll want to include a list of requested scopes based on what the Resource Server (our demo DJA app) requires.

There are a number of OAuth 2.0/Openid Connect 1.0 client libraries. I've chosen just to base this example on oauthlib.

TODO: There's also integrated OAuth client support in requests-oauthlib including automated token refresh.

OAuth 2.0 Service Endpoints

You need to know the various endpoints of the OAuth2 server. You can hard code them or query the server itself via the /.well-known/openid-configuration URL.

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import requests

oauth_server = 'https://oauth-test.cc.columbia.edu'

r = requests.get(oauth_server + '/.well-known/openid-configuration')
if r.status_code == 200:
    oauth_endpoints = r.json()

Oauth 2.0 Client Basic Auth

In most all cases you need to use HTTP Basic Auth to authenticate your client to the OAuth 2.0 Authorization Server using pre-registered client credentials (client_id and client_secret). This creates an HTTP header that looks like Authorization: Basic YWRtaW46YWRtaW4xMjM=.

The standard Python requests library has an HTTPBasicAuth() function that does the right thing.

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client_id = 'demo_trusted_client'
client_secret = 's9ht0XNvHEkvXfUhVD1Ka9DtXFxRHfTm'

oauth_auth = requests.auth.HTTPBasicAuth(client_id, client_secret)

A Backend (Client Credentials) Client

A "backend" client uses a very simple OAuth 2.0 grant: Client Credentials -- which uses the OAuth 2.0 token endpoint.

Use an instance of oauthlib's BackendApplicationClient to prepare_token_request() and post it. (The oauthlib prepare_* functions fill in everything needed for the HTTP request except the authorization info, which we've already set up, above.) 

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from oauthlib.oauth2 import BackendApplicationClient

scopes = 'auth-none read'

oauth_client = BackendApplicationClient(client_id)
(token_url, headers, body) = oauth_client.prepare_token_request(oauth_endpoints['token_endpoint'], scope=scopes)
token_response = requests.post(token_url, headers=headers, data=body, auth=oauth_auth)
A successful token response will look like this:

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{
    "access_token": "jAjCraG0uJ7YGXvIDWaCgl3eRDEm",
    "expires_in": 7199,
    "token_type": "Bearer",
}

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if token_response.status_code == 200:
    access_token = token_response.json()['access_token']

JSONAPI client

There are a number of JSONAPI client libraries available for many languages. You can also just directly manipulate the JSON responses and requests as we did in the examples with Postman.

The examples use jsonapi-requests which has both an ORM and raw (non-ORM) style. Let's start with the ORM style. You'll have to define your classes but then operations are really easy, looking similar to Django's model managers.

ORM Style

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import jsonapi_requests

api_url = 'http://localhost:8000/v1'


class BearerAuth(requests.auth.AuthBase):
    def __init__(self, access_token = None):
        if access_token:
            self.access_token = access_token
    def __call__(self, r):
        r.headers['Authorization'] = 'Bearer ' + self.access_token
        return r

api = jsonapi_requests.orm.OrmApi.config({
    'API_ROOT': api_url,
    'AUTH': BearerAuth(access_token),
    'VALIDATE_SSL': False,
    'TIMEOUT': 1,
})

class Course(jsonapi_requests.orm.ApiModel):
    class Meta:
        type = 'courses'
        api = api
    # attributes:
    school_bulletin_prefix_code = jsonapi_requests.orm.AttributeField('school_bulletin_prefix_code')
    suffix_two = jsonapi_requests.orm.AttributeField('suffix_two')
    subject_area_code = jsonapi_requests.orm.AttributeField('subject_area_code')
    course_number = jsonapi_requests.orm.AttributeField('course_number')
    course_identifier = jsonapi_requests.orm.AttributeField('course_identifier')
    course_name = jsonapi_requests.orm.AttributeField('course_name')
    course_description = jsonapi_requests.orm.AttributeField('course_description')
    # relationships
    course_terms = jsonapi_requests.orm.RelationField('course_terms')

class CourseTerm(jsonapi_requests.orm.ApiModel):
    class Meta:
        type = 'course_terms'
        api = api
    # attributes:
    term_identifier = jsonapi_requests.orm.AttributeField('term_identifier')
    audit_permitted_code = jsonapi_requests.orm.AttributeField('audit_permitted_code')
    exam_credit_flag = jsonapi_requests.orm.AttributeField('exam_credit_flag')
    # relationships:
    course = jsonapi_requests.orm.RelationField('course')

courses = Course.get_list(params={'filter[search]': 'accounting'})
print("Retrieved {} courses on this page".format(len(courses)))
for c in courses:
    print("Course {}: {} {}".format(c.id, c.course_identifier, c.course_name))

Sample exeution of the above: 

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django-jsonapi-training$ python
Python 3.6.6 (default, Jul 27 2018, 14:31:43) 
[GCC 4.2.1 Compatible Apple LLVM 9.1.0 (clang-902.0.39.2)] on darwin
Type "help", "copyright", "credits" or "license" for more information.
>>> import requests
>>> 
>>> oauth_server = 'https://oauth-test.cc.columbia.edu'
>>> 
>>> r = requests.get(oauth_server + '/.well-known/openid-configuration')
>>> if r.status_code == 200:
...     oauth_endpoints = r.json()
... 
>>> client_id = 'demo_trusted_client'
>>> client_secret = 's9ht0XNvHEkvXfUhVD1Ka9DtXFxRHfTm'
>>> 
>>> oauth_auth = requests.auth.HTTPBasicAuth(client_id, client_secret)
>>> from oauthlib.oauth2 import BackendApplicationClient
>>> 
>>> scopes = 'auth-none read'
>>> oauth_client = BackendApplicationClient(client_id)
>>> (token_url, headers, body) = oauth_client.prepare_token_request(oauth_endpoints['token_endpoint'], scope=scopes)
>>> token_response = requests.post(token_url, headers=headers, data=body, auth=oauth_auth)
>>> if token_response.status_code == 200:
...     access_token = token_response.json()['access_token']
... 
>>> import jsonapi_requests
>>> api_url = 'http://localhost:8000/v1'
>>> class BearerAuth(requests.auth.AuthBase):
...     def __init__(self, access_token = None):
...         if access_token:
...             self.access_token = access_token
...     def __call__(self, r):
...         r.headers['Authorization'] = 'Bearer ' + self.access_token
...         return r
... 
>>> api = jsonapi_requests.orm.OrmApi.config({
...     'API_ROOT': api_url,
...     'AUTH': BearerAuth(access_token),
...     'VALIDATE_SSL': False,
...     'TIMEOUT': 1,
... })
>>> class Course(jsonapi_requests.orm.ApiModel):
...     class Meta:
...         type = 'courses'
...         api = api
...     # attributes:
...     school_bulletin_prefix_code = jsonapi_requests.orm.AttributeField('school_bulletin_prefix_code')
...     suffix_two = jsonapi_requests.orm.AttributeField('suffix_two')
...     subject_area_code = jsonapi_requests.orm.AttributeField('subject_area_code')
...     course_number = jsonapi_requests.orm.AttributeField('course_number')
...     course_identifier = jsonapi_requests.orm.AttributeField('course_identifier')
...     course_name = jsonapi_requests.orm.AttributeField('course_name')
...     course_description = jsonapi_requests.orm.AttributeField('course_description')
...     # relationships
...     course_terms = jsonapi_requests.orm.RelationField('course_terms')
... 
>>> class CourseTerm(jsonapi_requests.orm.ApiModel):
...     class Meta:
...         type = 'course_terms'
...         api = api
...     # attributes:
...     term_identifier = jsonapi_requests.orm.AttributeField('term_identifier')
...     audit_permitted_code = jsonapi_requests.orm.AttributeField('audit_permitted_code')
...     exam_credit_flag = jsonapi_requests.orm.AttributeField('exam_credit_flag')
...     # relationships:
...     course = jsonapi_requests.orm.RelationField('course')
... 
>>> courses = Course.get_list(params={'filter[search]': 'accounting'})
>>> print("Retrieved {} courses on this page".format(len(courses)))
Retrieved 2 courses on this page
>>> for c in courses:
...     print("Course {}: {} {}".format(c.id, c.course_identifier, c.course_name))
... 
Course 00fb17bb-e4a0-49a0-a27e-6939e3e04b62: ACCT8122B Accounting for Consultants
Course 016659e9-e29f-49b4-b85d-d25da0724dbb: ACCT7022B Accounting for Value
>>>

N.B. Each RelationField you create must have a corresponding class definition or you'll get a key error.

Raw (non-ORM) Style

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import jsonapi_requests
from pprint import pprint, pformat

api_url = 'http://localhost:8000/v1'


class BearerAuth(requests.auth.AuthBase):
    def __init__(self, access_token = None):
        if access_token:
            self.access_token = access_token
    def __call__(self, r):
        r.headers['Authorization'] = 'Bearer ' + self.access_token
        return r

api = jsonapi_requests.Api.config({
    'API_ROOT': api_url,
    'AUTH': BearerAuth(access_token),
    'VALIDATE_SSL': False,
    'TIMEOUT': 1,
})

courses = api.endpoint('courses').get(params={'filter[search]': 'research dance', 'include': 'course_terms'})
print("found {} courses that match the filter".format(len(courses.data)))
one = courses.data[0]
pprint(one.attributes, indent=2)
for r in one.relationships:
    print("relationship {}:\n{}".format(r, pformat(one.relationships[r].data, indent=2)))
    print("links:\n{}".format(pformat(one.relationships[r].links, indent=2)))
# take a look at what was included:
print(courses.payload['included'][0]['id'])
pprint(courses.payload['included'][0]['attributes'], indent=2)

See the demo app source code for more sophisticated ORM operations.

Following is a sample execution of the above code snippets. Your mileage may vary based on what data is in your resource server. 

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django-jsonapi-training$ python
Python 3.6.6 (default, Jul 27 2018, 14:31:43) 
[GCC 4.2.1 Compatible Apple LLVM 9.1.0 (clang-902.0.39.2)] on darwin
Type "help", "copyright", "credits" or "license" for more information.
>>> import requests
>>> oauth_server = 'https://oauth-test.cc.columbia.edu'
>>> r = requests.get(oauth_server + '/.well-known/openid-configuration')
>>> if r.status_code == 200:
...     oauth_endpoints = r.json()
... 
>>> client_id = 'demo_trusted_client'
>>> client_secret = 's9ht0XNvHEkvXfUhVD1Ka9DtXFxRHfTm'
>>> oauth_auth = requests.auth.HTTPBasicAuth(client_id, client_secret)
>>> from oauthlib.oauth2 import BackendApplicationClient
>>> scopes = 'auth-none read'
>>> oauth_client = BackendApplicationClient(client_id)
>>> (token_url, headers, body) = oauth_client.prepare_token_request(oauth_endpoints['token_endpoint'], scope=scopes)
>>> token_response = requests.post(token_url, headers=headers, data=body, auth=oauth_auth)
>>> token_response
<Response [200]>
>>> if token_response.status_code == 200:
...     access_token = token_response.json()['access_token']
... 
>>> access_token
'KFmOrqrQjLBWHrLZQiAooyvtIxMW'
>>> import jsonapi_requests
>>> from pprint import pprint, pformat
>>> api_url = 'http://localhost:8000/v1'
>>> class BearerAuth(requests.auth.AuthBase):
...     def __init__(self, access_token = None):
...         if access_token:
...             self.access_token = access_token
...     def __call__(self, r):
...         r.headers['Authorization'] = 'Bearer ' + self.access_token
...         return r
... 
>>> api = jsonapi_requests.Api.config({
...     'API_ROOT': api_url,
...     'AUTH': BearerAuth(access_token),
...     'VALIDATE_SSL': False,
...     'TIMEOUT': 1,
... })
>>> courses = api.endpoint('courses').get(params={'filter[search]': 'research dance', 'include': 'course_terms'})
>>> print("found {} courses that match the filter".format(len(courses.data)))
found 1 courses that match the filter
>>> one = courses.data[0]
>>> pprint(one.attributes, indent=2)
{ 'course_description': 'SR PROJECT:RESEARCH FOR DANCE',
  'course_identifier': 'DNCE3592X',
  'course_name': 'SR PROJECT: RESEARCH FOR DANCE',
  'course_number': '03467',
  'effective_end_date': None,
  'effective_start_date': None,
  'last_mod_date': '2018-10-07',
  'last_mod_user_name': 'admin',
  'school_bulletin_prefix_code': 'XCEFG',
  'subject_area_code': 'DANB',
  'suffix_two': '00'}
>>> for r in one.relationships:
...     print("relationship {}:\n{}".format(r, pformat(one.relationships[r].data, indent=2)))
...     print("links:\n{}".format(pformat(one.relationships[r].links, indent=2)))
... 
relationship course_terms:
DynamicCollection.from_data([{'type': 'course_terms', 'id': 'd7db932c-daf2-426a-8e5b-8df1a4f9ecdb'}])
links:
{ 'related': 'http://localhost:8000/v1/courses/18839a7f-dde3-4dfb-95e8-2b0e4c58d4ce/course_terms/',
  'self': 'http://localhost:8000/v1/courses/18839a7f-dde3-4dfb-95e8-2b0e4c58d4ce/relationships/course_terms/'}
>>> print(courses.payload['included'][0]['id'])
d7db932c-daf2-426a-8e5b-8df1a4f9ecdb
>>> pprint(courses.payload['included'][0]['attributes'], indent=2)
{ 'audit_permitted_code': 0,
  'effective_end_date': None,
  'effective_start_date': None,
  'exam_credit_flag': False,
  'last_mod_date': '2018-10-07',
  'last_mod_user_name': 'admin',
  'term_identifier': '20181DNCE3592X'}
>>>

Installing and running the demo client

Make sure you have a local pypi repo that has this package installed and:

pip install demo-jsonapi-cli

Or, if you don't have the repo:

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pip install jsonapi_demo_cli/dist/jsonapi*whl
or just run as

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cd jsonapi_demo_cli; PYTHONPATH=$PWD python jsonapi_demo_cli/__main__.py

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usage: jsonapi-demo-cli [options]

optional arguments:
  -h, --help            show this help message and exit
  -o OAUTH_URL, --oauth_url OAUTH_URL
                        base URL of OAuth 2.0/OIDC server [default:
                        https://oauth.cc.columbia.edu]
  -a API_URL, --api_url API_URL
                        base URL of jsonapi resource server [default:
                        http://localhost:8000/v1]
  -i ID, --id ID        client ID
  -r REDIRECT_URL, --redirect_url REDIRECT_URL
                        redirect url
  -s SECRET, --secret SECRET
                        client secret
  -g {authorization_code,implicit,refresh_token,client_credentials}, --grant {authorization_code,implicit,refresh_token,client_credentials}
                        grant type [default: authorization_code]
  -S REQUESTED_SCOPES, --requested_scopes REQUESTED_SCOPES
                        requested scope(s) [default: auth-columbia read openid
                        profile email https://api.columbia.edu/scope/group]
  -R REFRESH_TOKEN, --refresh_token REFRESH_TOKEN
                        login with an existing refresh token

Example

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jsonapi-demo-cli -i demo_trusted_client -s s9ht0XNvHEkvXfUhVD1Ka9DtXFxRHfTm -r http://localhost:5432/oauth2client -o https://oauth-test.cc.columbia.edu -g client_credentials -S "auth-none read"
logged in access_token: yUhXV3vn2gZS1aA5wU1AZZTCi2zJ and refresh_token: None

ORM demo

Retrieved 2 courses on this page
Course 00fb17bb-e4a0-49a0-a27e-6939e3e04b62: ACCT8122B Accounting for Consultants: terms: 2
  CourseTerm 52cc86dd-7a78-48b8-a6a5-76c1fc7fc9be: 20181ACCT8122B ACCT8122B
  CourseTerm 00d14ddb-9fb5-4cff-9954-d52fc33217e7: 20191ACCT8122B ACCT8122B
    Instructor 0a879dc6-63d4-4a79-aae6-63ee2b379b32: John Jay (also teaching {'ACCT7022B'})
    Instructor 40678ab5-07fa-4c93-a680-bceda8a34735: Samuel Johnson (also teaching {'ANTH3160V'})
    Instructor aae87c7f-8515-44cf-b1c7-79c6f81cc5c5: Gouverneur Morris
Course 016659e9-e29f-49b4-b85d-d25da0724dbb: ACCT7022B Accounting for Value: terms: 2
  CourseTerm 39ca7b38-f273-4fa3-9494-5a422780aebd: 20181ACCT7022B ACCT7022B
    Instructor 0a879dc6-63d4-4a79-aae6-63ee2b379b32: John Jay (also teaching {'ACCT8122B'})
  CourseTerm 010a7ff7-ef5a-4b36-b3ff-9c34e30b76e8: 20191ACCT7022B ACCT7022B
Expected circular reference: 00fb17bb-e4a0-49a0-a27e-6939e3e04b62 == 00fb17bb-e4a0-49a0-a27e-6939e3e04b62
refreshing the login
logged in access_token: kupU8a4hqbyqoOqJd4awbSBjjRBi and refresh_token: None

raw (non-ORM) demo

Collection courses: http://localhost:8000/v1/courses/
Collection course_terms: http://localhost:8000/v1/course_terms/
Collection people: http://localhost:8000/v1/people/
Collection instructors: http://localhost:8000/v1/instructors/
======================================================================
Getting first page of courses collection:
links: { 'first': 'http://localhost:8000/v1/courses/?page%5Bnumber%5D=1&page%5Bsize%5D=5',
  'last': 'http://localhost:8000/v1/courses/?page%5Bnumber%5D=2&page%5Bsize%5D=5',
  'next': 'http://localhost:8000/v1/courses/?page%5Bnumber%5D=2&page%5Bsize%5D=5',
  'prev': None}
meta: {'pagination': {'count': 10, 'page': 1, 'pages': 2}}
there are 5 items in this page:
there are also 0 included items
----------------------------------------------------------------------
type: courses id: 01ca197f-c00c-4f24-a743-091b62f1d500:
attributes:
{ 'course_description': 'SENIOR RESEARCH ESSAY SEMINAR',
  'course_identifier': 'AMST3704X',
  'course_name': 'SENIOR RESEARCH ESSAY SEMINAR',
  'course_number': '00373',
  'effective_end_date': None,
  'effective_start_date': None,
  'last_mod_date': '2018-08-03',
  'last_mod_user_name': 'loader',
  'school_bulletin_prefix_code': 'XCEFK9',
  'subject_area_code': 'AMSB',
  'suffix_two': '00'}
links:
{ 'self': 'http://localhost:8000/v1/courses/01ca197f-c00c-4f24-a743-091b62f1d500/'}
relationships:
relationship course_terms:
DynamicCollection.from_data([{'type': 'course_terms', 'id': 'f9aa1a51-bf3b-45cf-b1cc-34ce47ca9913'}, {'type': 'course_terms', 'id': '01163a94-fc8f-47fe-bb4a-5407ad1a35fe'}])
links:
{ 'related': 'http://localhost:8000/v1/courses/01ca197f-c00c-4f24-a743-091b62f1d500/course_terms/',
  'self': 'http://localhost:8000/v1/courses/01ca197f-c00c-4f24-a743-091b62f1d500/relationships/course_terms/'}
----------------------------------------------------------------------
type: courses id: 001b55e0-9a60-4386-98c7-4c856bb840b4:
attributes:
{ 'course_description': 'THE BODY AND SOCIETY',
  'course_identifier': 'ANTH3160V',
  'course_name': 'THE BODY AND SOCIETY',
  'course_number': '04961',
  'effective_end_date': None,
  'effective_start_date': None,
  'last_mod_date': '2018-08-03',
  'last_mod_user_name': 'loader',
  'school_bulletin_prefix_code': 'XCEFK9',
  'subject_area_code': 'ANTB',
  'suffix_two': '00'}
links:
{ 'self': 'http://localhost:8000/v1/courses/001b55e0-9a60-4386-98c7-4c856bb840b4/'}
relationships:
relationship course_terms:
DynamicCollection.from_data([{'type': 'course_terms', 'id': '243e2b9c-a3c6-4d40-9b9a-2750d6c03250'}, {'type': 'course_terms', 'id': '00290ba0-ebae-44c0-9f4b-58a5f27240ed'}])
links:
{ 'related': 'http://localhost:8000/v1/courses/001b55e0-9a60-4386-98c7-4c856bb840b4/course_terms/',
  'self': 'http://localhost:8000/v1/courses/001b55e0-9a60-4386-98c7-4c856bb840b4/relationships/course_terms/'}
----------------------------------------------------------------------
type: courses id: 03e32754-3da7-4005-be6b-8de0e088816a:
attributes:
{ 'course_description': 'IND STUDIES-CIVIL ENGIN-SENIOR',
  'course_identifier': 'CIEN3304E',
  'course_name': 'IND STUDIES-CIVIL ENGIN-SENIOR',
  'course_number': '26118',
  'effective_end_date': None,
  'effective_start_date': None,
  'last_mod_date': '2018-08-03',
  'last_mod_user_name': 'loader',
  'school_bulletin_prefix_code': 'XCEF',
  'subject_area_code': 'CEEM',
  'suffix_two': '00'}
links:
{ 'self': 'http://localhost:8000/v1/courses/03e32754-3da7-4005-be6b-8de0e088816a/'}
relationships:
relationship course_terms:
DynamicCollection.from_data([{'type': 'course_terms', 'id': '964ff272-acb8-4adc-9a7e-21a241e63ff1'}, {'type': 'course_terms', 'id': '035c31c5-398d-43b7-a55b-19f6d1472797'}])
links:
{ 'related': 'http://localhost:8000/v1/courses/03e32754-3da7-4005-be6b-8de0e088816a/course_terms/',
  'self': 'http://localhost:8000/v1/courses/03e32754-3da7-4005-be6b-8de0e088816a/relationships/course_terms/'}
----------------------------------------------------------------------
type: courses id: 046741cd-c700-4752-b57a-e37a948ebc44:
attributes:
{ 'course_description': 'FinTech: Consumer Financial Se',
  'course_identifier': 'BUEC7255B',
  'course_name': 'FinTech: Consumer Financial Se',
  'course_number': '72074',
  'effective_end_date': None,
  'effective_start_date': None,
  'last_mod_date': '2018-08-03',
  'last_mod_user_name': 'loader',
  'school_bulletin_prefix_code': 'B',
  'subject_area_code': 'BUEC',
  'suffix_two': '00'}
links:
{ 'self': 'http://localhost:8000/v1/courses/046741cd-c700-4752-b57a-e37a948ebc44/'}
relationships:
relationship course_terms:
DynamicCollection.from_data([{'type': 'course_terms', 'id': 'bca761f7-03f6-4ff5-bbb8-b58467ef3970'}, {'type': 'course_terms', 'id': '0378c6c0-b658-4cf6-b8ba-6fa19614e3aa'}])
links:
{ 'related': 'http://localhost:8000/v1/courses/046741cd-c700-4752-b57a-e37a948ebc44/course_terms/',
  'self': 'http://localhost:8000/v1/courses/046741cd-c700-4752-b57a-e37a948ebc44/relationships/course_terms/'}
----------------------------------------------------------------------
type: courses id: 00fb17bb-e4a0-49a0-a27e-6939e3e04b62:
attributes:
{ 'course_description': 'Accounting for Consultants',
  'course_identifier': 'ACCT8122B',
  'course_name': 'Accounting for Consultants',
  'course_number': '73272',
  'effective_end_date': None,
  'effective_start_date': None,
  'last_mod_date': '2018-08-03',
  'last_mod_user_name': 'loader',
  'school_bulletin_prefix_code': 'B',
  'subject_area_code': 'ACCT',
  'suffix_two': '00'}
links:
{ 'self': 'http://localhost:8000/v1/courses/00fb17bb-e4a0-49a0-a27e-6939e3e04b62/'}
relationships:
relationship course_terms:
DynamicCollection.from_data([{'type': 'course_terms', 'id': '52cc86dd-7a78-48b8-a6a5-76c1fc7fc9be'}, {'type': 'course_terms', 'id': '00d14ddb-9fb5-4cff-9954-d52fc33217e7'}])
links:
{ 'related': 'http://localhost:8000/v1/courses/00fb17bb-e4a0-49a0-a27e-6939e3e04b62/course_terms/',
  'self': 'http://localhost:8000/v1/courses/00fb17bb-e4a0-49a0-a27e-6939e3e04b62/relationships/course_terms/'}
======================================================================
Getting 2nd page of filtered courses collection:
links: { 'first': 'http://localhost:8000/v1/courses/?include=course_terms&page%5Bnumber%5D=1&page%5Bsize%5D=5',
  'last': 'http://localhost:8000/v1/courses/?include=course_terms&page%5Bnumber%5D=2&page%5Bsize%5D=5',
  'next': None,
  'prev': 'http://localhost:8000/v1/courses/?include=course_terms&page%5Bnumber%5D=1&page%5Bsize%5D=5'}
meta: {'pagination': {'count': 10, 'page': 2, 'pages': 2}}
there are 5 items in this page:
there are also 8 included items
let's just look at the 3rd item on the 2nd page:
----------------------------------------------------------------------
type: courses id: 02e2e004-326e-4be8-aecc-aa67ece50fdf:
attributes:
{ 'course_description': 'MODERN iOS APPLICATION DEVELOP',
  'course_identifier': 'COMS3102W',
  'course_name': 'DEVELOPMENT TECHNOLOGY',
  'course_number': '84695',
  'effective_end_date': None,
  'effective_start_date': None,
  'last_mod_date': '2018-08-03',
  'last_mod_user_name': 'loader',
  'school_bulletin_prefix_code': 'RXCEIGF2U',
  'subject_area_code': 'COMS',
  'suffix_two': '00'}
links:
{ 'self': 'http://localhost:8000/v1/courses/02e2e004-326e-4be8-aecc-aa67ece50fdf/'}
relationships:
relationship course_terms:
DynamicCollection.from_data([{'type': 'course_terms', 'id': '2d763c14-a566-4600-860f-329e44cbbd4a'}, {'type': 'course_terms', 'id': '02e877b2-35c4-47d4-b72c-25bab1e87065'}])
links:
{ 'related': 'http://localhost:8000/v1/courses/02e2e004-326e-4be8-aecc-aa67ece50fdf/course_terms/',
  'self': 'http://localhost:8000/v1/courses/02e2e004-326e-4be8-aecc-aa67ece50fdf/relationships/course_terms/'}

TODO