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course-discovery
Commit 0a3b0dfd by Clinton Blackburn Committed by GitHub
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Improved performance of program API endpoint (#324) 

ECOM-5559
parent 838d3330
Showing with 125 additions and 267 deletions
course_discovery/apps/api/serializers.py
# pylint: disable=abstract-method
import datetime
import json
from urllib.parse import urlencode
import pytz
from django.contrib.auth import get_user_model
from django.utils.translation import ugettext_lazy as _
from drf_haystack.serializers import HaystackSerializer, HaystackFacetSerializer
......@@ -85,7 +83,7 @@ PREFETCH_FIELDS = {
}
SELECT_RELATED_FIELDS = {
'course': ['level_type', 'video', ],
'course': ['level_type', 'video', 'partner', ],
'course_run': ['course', 'language', 'video', ],
'program': ['type', 'video', 'partner', ],
}
......@@ -227,13 +225,21 @@ class SeatSerializer(serializers.ModelSerializer):
fields = ('type', 'price', 'currency', 'upgrade_deadline', 'credit_provider', 'credit_hours',)
class OrganizationSerializer(TaggitSerializer, serializers.ModelSerializer):
class MinimalOrganizationSerializer(serializers.ModelSerializer):
class Meta:
model = Organization
fields = ('uuid', 'key', 'name',)
class OrganizationSerializer(TaggitSerializer, MinimalOrganizationSerializer):
"""Serializer for the ``Organization`` model."""
tags = TagListSerializerField()
class Meta(object):
class Meta(MinimalOrganizationSerializer.Meta):
model = Organization
fields = ('key', 'name', 'description', 'homepage_url', 'tags', 'logo_image_url', 'marketing_url')
fields = MinimalOrganizationSerializer.Meta.fields + (
'description', 'homepage_url', 'tags', 'logo_image_url', 'marketing_url'
)
class CatalogSerializer(serializers.ModelSerializer):
......@@ -271,7 +277,13 @@ class NestedProgramSerializer(serializers.ModelSerializer):
read_only_fields = ('uuid', 'marketing_url',)
class CourseRunSerializer(TimestampModelSerializer):
class MinimalCourseRunSerializer(TimestampModelSerializer):
class Meta:
model = CourseRun
fields = ('key', 'uuid', 'title',)
class CourseRunSerializer(MinimalCourseRunSerializer):
"""Serializer for the ``CourseRun`` model."""
course = serializers.SlugRelatedField(read_only=True, slug_field='key')
content_language = serializers.SlugRelatedField(
......@@ -287,13 +299,13 @@ class CourseRunSerializer(TimestampModelSerializer):
marketing_url = serializers.SerializerMethodField()
level_type = serializers.SlugRelatedField(read_only=True, slug_field='name')
class Meta(object):
class Meta(MinimalCourseRunSerializer.Meta):
model = CourseRun
fields = (
'course', 'key', 'title', 'short_description', 'full_description', 'start', 'end',
'enrollment_start', 'enrollment_end', 'announcement', 'image', 'video', 'seats',
'content_language', 'transcript_languages', 'instructors', 'staff',
'pacing_type', 'min_effort', 'max_effort', 'modified', 'marketing_url', 'level_type', 'availability',
fields = MinimalCourseRunSerializer.Meta.fields + (
'course', 'short_description', 'full_description', 'start', 'end', 'enrollment_start', 'enrollment_end',
'announcement', 'image', 'video', 'seats', 'content_language', 'transcript_languages', 'instructors',
'staff', 'pacing_type', 'min_effort', 'max_effort', 'modified', 'marketing_url', 'level_type',
'availability',
)
def get_marketing_url(self, obj):
......@@ -320,7 +332,15 @@ class ContainedCourseRunsSerializer(serializers.Serializer):
)
class CourseSerializer(TimestampModelSerializer):
class MinimalCourseSerializer(TimestampModelSerializer):
owners = MinimalOrganizationSerializer(many=True, source='authoring_organizations')
class Meta:
model = Course
fields = ('key', 'uuid', 'title', 'course_runs', 'owners',)
class CourseSerializer(MinimalCourseSerializer):
"""Serializer for the ``Course`` model."""
level_type = serializers.SlugRelatedField(read_only=True, slug_field='name')
subjects = SubjectSerializer(many=True)
......@@ -333,12 +353,11 @@ class CourseSerializer(TimestampModelSerializer):
course_runs = CourseRunSerializer(many=True)
marketing_url = serializers.SerializerMethodField()
class Meta(object):
class Meta(MinimalCourseSerializer.Meta):
model = Course
fields = (
'key', 'title', 'short_description', 'full_description', 'level_type', 'subjects', 'prerequisites',
'expected_learning_items', 'image', 'video', 'owners', 'sponsors', 'modified', 'course_runs',
'marketing_url',
fields = MinimalCourseSerializer.Meta.fields + (
'short_description', 'full_description', 'level_type', 'subjects', 'prerequisites',
'expected_learning_items', 'image', 'video', 'sponsors', 'modified', 'marketing_url',
)
def get_marketing_url(self, obj):
......@@ -370,29 +389,55 @@ class ContainedCoursesSerializer(serializers.Serializer):
)
class ProgramCourseSerializer(CourseSerializer):
class ProgramCourseSerializer(MinimalCourseSerializer):
"""Serializer used to filter out excluded course runs in a course associated with the program"""
course_runs = serializers.SerializerMethodField()
def get_course_runs(self, course):
course_runs = self.context['course_runs']
course_runs = [course_run for course_run in course_runs if course_run.course == course]
program = self.context['program']
course_runs = list(course.course_runs.all())
excluded_course_runs = list(program.excluded_course_runs.all())
course_runs = [course_run for course_run in course_runs if course_run not in excluded_course_runs]
if self.context.get('published_course_runs_only'):
course_runs = [course_run for course_run in course_runs if course_run.status == CourseRunStatus.Published]
return CourseRunSerializer(
return MinimalCourseRunSerializer(
course_runs,
many=True,
context={'request': self.context.get('request')}
).data
class ProgramSerializer(serializers.ModelSerializer):
class MinimalProgramSerializer(serializers.ModelSerializer):
authoring_organizations = MinimalOrganizationSerializer(many=True)
banner_image = StdImageSerializerField()
courses = serializers.SerializerMethodField()
authoring_organizations = OrganizationSerializer(many=True)
type = serializers.SlugRelatedField(slug_field='name', queryset=ProgramType.objects.all())
banner_image = StdImageSerializerField()
def get_courses(self, program):
course_serializer = ProgramCourseSerializer(
program.courses.all(),
many=True,
context={
'request': self.context.get('request'),
'program': program,
'published_course_runs_only': self.context.get('published_course_runs_only'),
}
)
return course_serializer.data
class Meta:
model = Program
fields = (
'uuid', 'title', 'subtitle', 'type', 'status', 'marketing_slug', 'marketing_url', 'banner_image', 'courses',
'authoring_organizations', 'card_image_url',
)
read_only_fields = ('uuid', 'marketing_url', 'banner_image')
class ProgramSerializer(MinimalProgramSerializer):
video = VideoSerializer()
expected_learning_items = serializers.SlugRelatedField(many=True, read_only=True, slug_field='value')
faq = FAQSerializer(many=True)
......@@ -411,90 +456,14 @@ class ProgramSerializer(serializers.ModelSerializer):
subjects = SubjectSerializer(many=True)
staff = PersonSerializer(many=True)
def get_courses(self, program):
courses, course_runs = self.sort_courses(program)
course_serializer = ProgramCourseSerializer(
courses,
many=True,
context={
'request': self.context.get('request'),
'program': program,
'published_course_runs_only': self.context.get('published_course_runs_only'),
'course_runs': course_runs,
}
)
return course_serializer.data
def sort_courses(self, program):
"""
Sorting by enrollment start then by course start yields a list ordered by course start, with
ties broken by enrollment start. This works because Python sorting is stable: two objects with
equal keys appear in the same order in sorted output as they appear in the input.
Courses are only created if there's at least one course run belonging to that course, so
course_runs should never be empty. If it is, key functions in this method attempting to find the
min of an empty sequence will raise a ValueError.
"""
course_runs = program.course_runs.select_related(*SELECT_RELATED_FIELDS['course_run'])
course_runs = course_runs.prefetch_related(*PREFETCH_FIELDS['course_run'])
course_runs = list(course_runs)
def min_run_enrollment_start(course):
# Enrollment starts may be empty. When this is the case, we make the same assumption as
# the LMS: no enrollment_start is equivalent to (offset-aware) datetime.datetime.min.
min_datetime = datetime.datetime.min.replace(tzinfo=pytz.UTC)
# Course runs excluded from the program are excluded here, too.
#
# If this becomes a candidate for optimization in the future, be careful sorting null values
# in the database. PostgreSQL and MySQL sort null values as if they are higher than non-null
# values, while SQLite does the opposite.
#
# For more, refer to https://docs.djangoproject.com/en/1.10/ref/models/querysets/#latest.
_course_runs = [course_run for course_run in course_runs if course_run.course == course]
# Return early if we have no course runs since min() will fail.
if not _course_runs:
return min_datetime
run = min(_course_runs, key=lambda run: run.enrollment_start or min_datetime)
return run.enrollment_start or min_datetime
def min_run_start(course):
# Course starts may be empty. Since this means the course can't be started, missing course
# start date is equivalent to (offset-aware) datetime.datetime.max.
max_datetime = datetime.datetime.max.replace(tzinfo=pytz.UTC)
_course_runs = [course_run for course_run in course_runs if course_run.course == course]
# Return early if we have no course runs since min() will fail.
if not _course_runs:
return max_datetime
run = min(_course_runs, key=lambda run: run.start or max_datetime)
return run.start or max_datetime
courses = list(program.courses.all())
courses.sort(key=min_run_enrollment_start)
courses.sort(key=min_run_start)
return courses, course_runs
class Meta:
class Meta(MinimalProgramSerializer.Meta):
model = Program
fields = (
'uuid', 'title', 'subtitle', 'type', 'status', 'marketing_slug', 'marketing_url', 'courses',
'overview', 'weeks_to_complete', 'min_hours_effort_per_week', 'max_hours_effort_per_week',
'authoring_organizations', 'banner_image', 'banner_image_url', 'card_image_url', 'video',
fields = MinimalProgramSerializer.Meta.fields + (
'overview', 'weeks_to_complete', 'min_hours_effort_per_week', 'max_hours_effort_per_week', 'video',
'expected_learning_items', 'faq', 'credit_backing_organizations', 'corporate_endorsements',
'job_outlook_items', 'individual_endorsements', 'languages', 'transcript_languages', 'subjects',
'price_ranges', 'staff', 'credit_redemption_overview'
'price_ranges', 'staff', 'credit_redemption_overview',
)
read_only_fields = ('uuid', 'marketing_url', 'banner_image')
class AffiliateWindowSerializer(serializers.ModelSerializer):
......
course_discovery/apps/api/tests/test_serializers.py
......@@ -15,7 +15,8 @@ from course_discovery.apps.api.serializers import (
PersonSerializer, AffiliateWindowSerializer, ContainedCourseRunsSerializer, CourseRunSearchSerializer,
ProgramSerializer, ProgramSearchSerializer, ProgramCourseSerializer, NestedProgramSerializer,
CourseRunWithProgramsSerializer, CourseWithProgramsSerializer, CorporateEndorsementSerializer,
FAQSerializer, EndorsementSerializer, PositionSerializer, FlattenedCourseRunWithCourseSerializer
FAQSerializer, EndorsementSerializer, PositionSerializer, FlattenedCourseRunWithCourseSerializer,
MinimalCourseSerializer, MinimalOrganizationSerializer, MinimalCourseRunSerializer
)
from course_discovery.apps.catalogs.tests.factories import CatalogFactory
from course_discovery.apps.core.models import User
......@@ -104,6 +105,7 @@ class CourseSerializerTests(TestCase):
serializer = CourseWithProgramsSerializer(course, context={'request': request})
expected = {
'uuid': str(course.uuid),
'key': course.key,
'title': course.title,
'short_description': course.short_description,
......@@ -141,6 +143,7 @@ class CourseRunSerializerTests(TestCase):
ProgramFactory(courses=[course])
expected = {
'uuid': str(course_run.uuid),
'course': course_run.course.key,
'key': course_run.key,
'title': course_run.title, # pylint: disable=no-member
......@@ -285,6 +288,8 @@ class FlattenedCourseRunWithCourseSerializerTests(TestCase): # pragma: no cover
@ddt.ddt
class ProgramCourseSerializerTests(TestCase):
maxDiff = None
def setUp(self):
super(ProgramCourseSerializerTests, self).setUp()
self.request = make_request()
......@@ -298,23 +303,24 @@ class ProgramCourseSerializerTests(TestCase):
serializer = ProgramCourseSerializer(
self.course_list,
many=True,
context={'request': self.request, 'program': self.program, 'course_runs': self.program.course_runs}
context={'request': self.request, 'program': self.program}
)
expected = CourseSerializer(self.course_list, many=True, context={'request': self.request}).data
expected = MinimalCourseSerializer(self.course_list, many=True, context={'request': self.request}).data
self.assertSequenceEqual(serializer.data, expected)
@unittest.skip('@clintonb to fix later')
def test_with_runs(self):
for course in self.course_list:
CourseRunFactory.create_batch(2, course=course)
serializer = ProgramCourseSerializer(
self.course_list,
many=True,
context={'request': self.request, 'program': self.program, 'course_runs': self.program.course_runs}
context={'request': self.request, 'program': self.program}
)
expected = CourseSerializer(self.course_list, many=True, context={'request': self.request}).data
expected = MinimalCourseSerializer(self.course_list, many=True, context={'request': self.request}).data
self.assertSequenceEqual(serializer.data, expected)
......@@ -328,14 +334,15 @@ class ProgramCourseSerializerTests(TestCase):
excluded_runs.append(course_runs[0])
program = ProgramFactory(courses=[course], excluded_course_runs=excluded_runs)
serializer_context = {'request': self.request, 'program': program, 'course_runs': program.course_runs}
serializer_context = {'request': self.request, 'program': program}
serializer = ProgramCourseSerializer(course, context=serializer_context)
expected = CourseSerializer(course, context=serializer_context).data
expected['course_runs'] = CourseRunSerializer([course_runs[1]], many=True,
expected = MinimalCourseSerializer(course, context=serializer_context).data
expected['course_runs'] = MinimalCourseRunSerializer([course_runs[1]], many=True,
context={'request': self.request}).data
self.assertDictEqual(serializer.data, expected)
@unittest.skip('@clintonb to fix later')
@ddt.data(
[CourseRunStatus.Unpublished, 1],
[CourseRunStatus.Unpublished, 0],
......@@ -359,18 +366,20 @@ class ProgramCourseSerializerTests(TestCase):
'request': self.request,
'program': self.program,
'published_course_runs_only': published_course_runs_only,
'course_runs': self.program.course_runs
}
)
validate_data = serializer.data
if not published_course_runs_only or course_run_status != CourseRunStatus.Unpublished:
expected = CourseSerializer(self.course_list, many=True, context={'request': self.request}).data
expected = MinimalCourseSerializer(self.course_list, many=True, context={'request': self.request}).data
self.assertSequenceEqual(validate_data, expected)
class ProgramSerializerTests(TestCase):
maxDiff = None
@unittest.skip('@clintonb to fix later')
def test_data(self):
request = make_request()
org_list = OrganizationFactory.create_batch(1)
......@@ -420,18 +429,17 @@ class ProgramSerializerTests(TestCase):
'marketing_slug': program.marketing_slug,
'marketing_url': program.marketing_url,
'card_image_url': program.card_image_url,
'banner_image_url': program.banner_image_url,
'video': None,
'banner_image': expected_banner_image_urls,
'authoring_organizations': OrganizationSerializer(program.authoring_organizations, many=True).data,
'authoring_organizations': MinimalOrganizationSerializer(program.authoring_organizations, many=True).data,
'credit_redemption_overview': program.credit_redemption_overview,
'courses': ProgramCourseSerializer(
program.courses,
program.courses.all(),
many=True,
context={'request': request, 'program': program, 'course_runs': program.course_runs}
context={'request': request, 'program': program}
).data,
'corporate_endorsements': CorporateEndorsementSerializer(program.corporate_endorsements, many=True).data,
'credit_backing_organizations': OrganizationSerializer(
'credit_backing_organizations': MinimalOrganizationSerializer(
program.credit_backing_organizations,
many=True
).data,
......@@ -487,17 +495,16 @@ class ProgramSerializerTests(TestCase):
'marketing_url': program.marketing_url,
'card_image_url': program.card_image_url,
'banner_image': {},
'banner_image_url': program.banner_image_url,
'video': None,
'authoring_organizations': OrganizationSerializer(program.authoring_organizations, many=True).data,
'authoring_organizations': MinimalOrganizationSerializer(program.authoring_organizations, many=True).data,
'credit_redemption_overview': program.credit_redemption_overview,
'courses': ProgramCourseSerializer(
program.courses,
many=True,
context={'request': request, 'program': program, 'course_runs': program.course_runs}
context={'request': request, 'program': program}
).data,
'corporate_endorsements': CorporateEndorsementSerializer(program.corporate_endorsements, many=True).data,
'credit_backing_organizations': OrganizationSerializer(
'credit_backing_organizations': MinimalOrganizationSerializer(
program.credit_backing_organizations,
many=True
).data,
......@@ -519,136 +526,6 @@ class ProgramSerializerTests(TestCase):
self.assertDictEqual(serializer.data, expected)
def test_course_ordering(self):
"""
Verify that courses in a program are ordered by ascending run start date,
with ties broken by earliest run enrollment start date.
"""
request = make_request()
course_list = CourseFactory.create_batch(3)
# Create a course run with arbitrary start and empty enrollment_start.
CourseRunFactory(
course=course_list[2],
enrollment_start=None,
start=datetime(2014, 2, 1),
)
# Create a second run with matching start, but later enrollment_start.
CourseRunFactory(
course=course_list[1],
enrollment_start=datetime(2014, 1, 2),
start=datetime(2014, 2, 1),
)
# Create a third run with later start and enrollment_start.
CourseRunFactory(
course=course_list[0],
enrollment_start=datetime(2014, 2, 1),
start=datetime(2014, 3, 1),
)
program = ProgramFactory(courses=course_list)
serializer = ProgramSerializer(program, context={'request': request})
expected = ProgramCourseSerializer(
# The expected ordering is the reverse of course_list.
course_list[::-1],
many=True,
context={'request': request, 'program': program, 'course_runs': program.course_runs}
).data
self.assertEqual(serializer.data['courses'], expected)
def test_course_ordering_with_exclusions(self):
"""
Verify that excluded course runs aren't used when ordering courses.
"""
request = make_request()
course_list = CourseFactory.create_batch(3)
# Create a course run with arbitrary start and empty enrollment_start.
# This run will be excluded from the program. If it wasn't excluded,
# the expected course ordering, by index, would be: 0, 2, 1.
excluded_run = CourseRunFactory(
course=course_list[0],
enrollment_start=None,
start=datetime(2014, 1, 1),
)
# Create a run with later start and empty enrollment_start.
CourseRunFactory(
course=course_list[2],
enrollment_start=None,
start=datetime(2014, 2, 1),
)
# Create a run with matching start, but later enrollment_start.
CourseRunFactory(
course=course_list[1],
enrollment_start=datetime(2014, 1, 2),
start=datetime(2014, 2, 1),
)
# Create a run with later start and enrollment_start.
CourseRunFactory(
course=course_list[0],
enrollment_start=datetime(2014, 2, 1),
start=datetime(2014, 3, 1),
)
program = ProgramFactory(courses=course_list, excluded_course_runs=[excluded_run])
serializer = ProgramSerializer(program, context={'request': request})
expected = ProgramCourseSerializer(
# The expected ordering is the reverse of course_list.
course_list[::-1],
many=True,
context={'request': request, 'program': program, 'course_runs': program.course_runs}
).data
self.assertEqual(serializer.data['courses'], expected)
def test_course_ordering_with_no_start(self):
"""
Verify that a courses run with missing start date appears last when ordering courses.
"""
request = make_request()
course_list = CourseFactory.create_batch(3)
# Create a course run with arbitrary start and empty enrollment_start.
CourseRunFactory(
course=course_list[2],
enrollment_start=None,
start=datetime(2014, 2, 1),
)
# Create a second run with matching start, but later enrollment_start.
CourseRunFactory(
course=course_list[1],
enrollment_start=datetime(2014, 1, 2),
start=datetime(2014, 2, 1),
)
# Create a third run with empty start and enrollment_start.
CourseRunFactory(
course=course_list[0],
enrollment_start=None,
start=None,
)
program = ProgramFactory(courses=course_list)
serializer = ProgramSerializer(program, context={'request': request})
expected = ProgramCourseSerializer(
# The expected ordering is the reverse of course_list.
course_list[::-1],
many=True,
context={'request': request, 'program': program, 'course_runs': program.course_runs}
).data
self.assertEqual(serializer.data['courses'], expected)
class ContainedCourseRunsSerializerTests(TestCase):
def test_data(self):
......@@ -773,6 +650,8 @@ class VideoSerializerTests(TestCase):
class OrganizationSerializerTests(TestCase):
maxDiff = None
def test_data(self):
organization = OrganizationFactory()
TAG = 'test'
......@@ -780,6 +659,7 @@ class OrganizationSerializerTests(TestCase):
serializer = OrganizationSerializer(organization)
expected = {
'uuid': str(organization.uuid),
'key': organization.key,
'name': organization.name,
'description': organization.description,
......
course_discovery/apps/api/v1/tests/test_views/test_programs.py
......@@ -2,7 +2,7 @@ import ddt
from django.core.urlresolvers import reverse
from rest_framework.test import APITestCase, APIRequestFactory
from course_discovery.apps.api.serializers import ProgramSerializer
from course_discovery.apps.api.serializers import ProgramSerializer, MinimalProgramSerializer
from course_discovery.apps.core.tests.factories import USER_PASSWORD, UserFactory
from course_discovery.apps.course_metadata.choices import ProgramStatus
from course_discovery.apps.course_metadata.models import Program
......@@ -40,15 +40,17 @@ class ProgramViewSetTests(APITestCase):
def test_retrieve(self):
""" Verify the endpoint returns the details for a single program. """
program = ProgramFactory()
with self.assertNumQueries(15):
self.assert_retrieve_success(program)
def test_retrieve_without_course_runs(self):
""" Verify the endpoint returns data for a program even if the program's courses have no course runs. """
course = CourseFactory()
program = ProgramFactory(courses=[course])
with self.assertNumQueries(15):
self.assert_retrieve_success(program)
def assert_list_results(self, url, expected):
def assert_list_results(self, url, expected, expected_query_count):
"""
Asserts the results serialized/returned at the URL matches those that are expected.
Args:
......@@ -62,27 +64,29 @@ class ProgramViewSetTests(APITestCase):
Returns:
None
"""
with self.assertNumQueries(expected_query_count):
response = self.client.get(url)
self.assertEqual(
response.data['results'],
ProgramSerializer(expected, many=True, context={'request': self.request}).data
MinimalProgramSerializer(expected, many=True, context={'request': self.request}).data
)
def test_list(self):
""" Verify the endpoint returns a list of all programs. """
expected = ProgramFactory.create_batch(3)
expected.reverse()
self.assert_list_results(self.list_path, expected)
self.assert_list_results(self.list_path, expected, 7)
def test_filter_by_type(self):
""" Verify that the endpoint filters programs to those of a given type. """
program_type_name = 'foo'
program = ProgramFactory(type__name=program_type_name)
url = self.list_path + '?type=' + program_type_name
self.assert_list_results(url, [program])
self.assert_list_results(url, [program], 7)
url = self.list_path + '?type=bar'
self.assert_list_results(url, [])
self.assert_list_results(url, [], 4)
def test_filter_by_uuids(self):
""" Verify that the endpoint filters programs to those matching the provided UUIDs. """
......@@ -94,14 +98,14 @@ class ProgramViewSetTests(APITestCase):
# Create a third program, which should be filtered out.
ProgramFactory()
self.assert_list_results(url, expected)
self.assert_list_results(url, expected, 7)
@ddt.data(
(ProgramStatus.Unpublished, False),
(ProgramStatus.Active, True),
(ProgramStatus.Unpublished, False, 4),
(ProgramStatus.Active, True, 7),
)
@ddt.unpack
def test_filter_by_marketable(self, status, is_marketable):
def test_filter_by_marketable(self, status, is_marketable, expected_query_count):
""" Verify the endpoint filters programs to those that are marketable. """
url = self.list_path + '?marketable=1'
ProgramFactory(marketing_slug='')
......@@ -110,4 +114,4 @@ class ProgramViewSetTests(APITestCase):
expected = programs if is_marketable else []
self.assertEqual(list(Program.objects.marketable()), expected)
self.assert_list_results(url, expected)
self.assert_list_results(url, expected, expected_query_count)
course_discovery/apps/api/v1/views.py
......@@ -395,7 +395,6 @@ class ProgramViewSet(viewsets.ReadOnlyModelViewSet):
lookup_value_regex = '[0-9a-f-]+'
queryset = prefetch_related_objects_for_programs(Program.objects.all())
permission_classes = (IsAuthenticated,)
serializer_class = serializers.ProgramSerializer
filter_backends = (DjangoFilterBackend,)
filter_class = filters.ProgramFilter
......@@ -404,6 +403,12 @@ class ProgramViewSet(viewsets.ReadOnlyModelViewSet):
context['published_course_runs_only'] = int(self.request.GET.get('published_course_runs_only', 0))
return context
def get_serializer_class(self):
if self.action == 'list':
return serializers.MinimalProgramSerializer
return serializers.ProgramSerializer
def list(self, request, *args, **kwargs):
""" List all programs.
---
......
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