class MinimalCourseRunSerializer(TimestampModelSerializer):
image = ImageField(read_only=True, source='card_image_url')
marketing_url = serializers.SerializerMethodField()
@classmethod
def prefetch_queryset(cls):
return CourseRun.objects.all().select_related(
'course').prefetch_related(
'course__partner',
Prefetch('seats', queryset=SeatSerializer.prefetch_queryset()),
)
class Meta:
model = CourseRun
fields = (
'key',
'uuid',
'title',
'image',
'short_description',
'marketing_url',
'start',
'end',
'enrollment_start',
'enrollment_end',
'pacing_type',
'type',
)
def get_marketing_url(self, obj):
return get_marketing_url_for_user(
self.context['request'].user,
obj.marketing_url,
exclude_utm=self.context.get('exclude_utm'))
def get_expected_data(self, request, course_run):
course = course_run.course
serializer_context = {'request': request}
expected = dict(
CourseRunSerializer(course_run, context=serializer_context).data)
expected.update({
'subjects':
self.serialize_items(course.subjects.all(), 'name'),
'seats':
self.serialize_seats(course_run),
'owners':
self.serialize_items(course.authoring_organizations.all(), 'key'),
'sponsors':
self.serialize_items(course.sponsoring_organizations.all(), 'key'),
'prerequisites':
self.serialize_items(course.prerequisites.all(), 'name'),
'level_type':
course_run.level_type.name if course_run.level_type else None,
'expected_learning_items':
self.serialize_items(course.expected_learning_items.all(),
'value'),
'course_key':
course.key,
'image':
ImageField().to_representation(course_run.card_image_url),
})
# Remove fields found in CourseRunSerializer, but not in FlattenedCourseRunWithCourseSerializer.
fields_to_remove = set(CourseRunSerializer.Meta.fields) - set(
FlattenedCourseRunWithCourseSerializer.Meta.fields)
for key in fields_to_remove:
del expected[key]
return expected
def get_expected_data(self, course_run, request): # pylint: disable=unused-argument
return {
'key':
course_run.key,
'uuid':
str(course_run.uuid),
'title':
course_run.title,
'short_description':
course_run.short_description,
'image':
ImageField().to_representation(course_run.card_image_url),
'marketing_url':
'{url}?{params}'.format(url=course_run.marketing_url,
params=urlencode({
'utm_source':
request.user.username,
'utm_medium':
request.user.referral_tracking_id,
})),
'start':
json_date_format(course_run.start),
'end':
json_date_format(course_run.end),
'enrollment_start':
json_date_format(course_run.enrollment_start),
'enrollment_end':
json_date_format(course_run.enrollment_end),
'pacing_type':
course_run.pacing_type,
'type':
course_run.type,
}
def test_imagefield_to_representation():
value = 'https://example.com/image.jpg'
expected = {
'src': value,
'description': None,
'height': None,
'width': None
}
assert ImageField().to_representation(value) == expected
def test_to_representation(self):
value = 'https://example.com/image.jpg'
expected = {
'src': value,
'description': None,
'height': None,
'width': None
}
self.assertEqual(ImageField().to_representation(value), expected)
class MinimalCourseSerializer(TimestampModelSerializer):
course_runs = MinimalCourseRunSerializer(many=True)
owners = MinimalOrganizationSerializer(many=True, source='authoring_organizations')
image = ImageField(read_only=True, source='card_image_url')
@classmethod
def prefetch_queryset(cls):
return Course.objects.all().select_related('partner').prefetch_related(
'authoring_organizations',
Prefetch('course_runs', queryset=MinimalCourseRunSerializer.prefetch_queryset()),
)
class Meta:
model = Course
fields = ('key', 'uuid', 'title', 'course_runs', 'owners', 'image',)
def get_expected_data(self, course, request):
context = {'request': request}
return {
'key':
course.key,
'uuid':
str(course.uuid),
'title':
course.title,
'course_runs':
MinimalCourseRunSerializer(course.course_runs,
many=True,
context=context).data,
'owners':
MinimalOrganizationSerializer(course.authoring_organizations,
many=True,
context=context).data,
'image':
ImageField().to_representation(course.card_image_url),
}
class FlattenedCourseRunWithCourseSerializer(CourseRunSerializer):
seats = serializers.SerializerMethodField()
owners = serializers.SerializerMethodField()
sponsors = serializers.SerializerMethodField()
subjects = serializers.SerializerMethodField()
prerequisites = serializers.SerializerMethodField()
expected_learning_items = serializers.SerializerMethodField()
course_key = serializers.SlugRelatedField(read_only=True, source='course', slug_field='key')
image = ImageField(read_only=True, source='card_image_url')
class Meta:
model = CourseRun
fields = (
'key', 'title', 'short_description', 'full_description', 'level_type', 'subjects', 'prerequisites',
'start', 'end', 'enrollment_start', 'enrollment_end', 'announcement', 'seats', 'content_language',
'transcript_languages', 'staff', 'pacing_type', 'min_effort', 'max_effort', 'course_key',
'expected_learning_items', 'image', 'video', 'owners', 'sponsors', 'modified', 'marketing_url',
)
def get_seats(self, obj):
seats = {
'audit': {
'type': ''
},
'honor': {
'type': ''
},
'verified': {
'type': '',
'currency': '',
'price': '',
'upgrade_deadline': '',
},
'professional': {
'type': '',
'currency': '',
'price': '',
'upgrade_deadline': '',
},
'credit': {
'type': [],
'currency': [],
'price': [],
'upgrade_deadline': [],
'credit_provider': [],
'credit_hours': [],
},
}
for seat in obj.seats.all():
for key in seats[seat.type].keys():
if seat.type == 'credit':
seats['credit'][key].append(SeatSerializer(seat).data[key])
else:
seats[seat.type][key] = SeatSerializer(seat).data[key]
for credit_attr in seats['credit']:
seats['credit'][credit_attr] = ','.join([str(e) for e in seats['credit'][credit_attr]])
return seats
def get_owners(self, obj):
return ','.join([owner.key for owner in obj.course.authoring_organizations.all()])
def get_sponsors(self, obj):
return ','.join([sponsor.key for sponsor in obj.course.sponsoring_organizations.all()])
def get_subjects(self, obj):
return ','.join([subject.name for subject in obj.course.subjects.all()])
def get_prerequisites(self, obj):
return ','.join([prerequisite.name for prerequisite in obj.course.prerequisites.all()])
def get_expected_learning_items(self, obj):
return ','.join(
[expected_learning_item.value for expected_learning_item in obj.course.expected_learning_items.all()]
)
