53 lines
1.6 KiB
Python
53 lines
1.6 KiB
Python
from pprint import pprint
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from django.db.models import Aggregate, CharField, Value
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from django.db.models import IntegerField, F
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from news.models import NewsType
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from tag.models import TagCategory
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from transfer.models import PageTexts
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from transfer.serializers.news import NewsSerializer
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class GroupConcat(Aggregate):
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function = 'GROUP_CONCAT'
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template = '%(function)s(%(expressions)s)'
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def __init__(self, expression, **extra):
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output_field = extra.pop('output_field', CharField())
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super().__init__(expression, output_field=output_field, **extra)
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def as_postgresql(self, compiler, connection):
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self.function = 'STRING_AGG'
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return super().as_sql(compiler, connection)
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def transfer_news():
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news_type, _ = NewsType.objects.get_or_create(name='News')
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tag_cat, _ = TagCategory.objects.get_or_create(index_name='tag')
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news_type.tag_categories.add(tag_cat)
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news_type.save()
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queryset = PageTexts.objects.filter(
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page__type='News',
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).annotate(
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tag_cat_id=Value(tag_cat.id, output_field=IntegerField()),
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news_type_id=Value(news_type.id, output_field=IntegerField()),
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country_code=F('page__site__country_code_2'),
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news_title=F('page__root_title'),
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image=F('page__attachment_suffix_url'),
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template=F('page__template'),
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tags=GroupConcat('page__tags__id'),
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)
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serialized_data = NewsSerializer(data=list(queryset.values()), many=True)
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if serialized_data.is_valid():
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serialized_data.save()
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else:
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pprint(f'News serializer errors: {serialized_data.errors}')
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data_types = {
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'news': [transfer_news]
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}
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