mirror of
https://github.com/thecyberlearn/chat-backend.git
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a0fce0b484
Features: - Django REST API backend - Multi-strategy web scraping system (Beautiful Soup, Playwright, Firecrawl) - Anti-detection features (proxy rotation, user-agent rotation) - Data export functionality (JSON, CSV, TXT) - Business and CrawledPage models - Enhanced crawling service with fallback mechanisms 🤖 Generated with [Claude Code](https://claude.ai/code) Co-Authored-By: Claude <noreply@anthropic.com>
66 lines
1.5 KiB
Python
66 lines
1.5 KiB
Python
from django.contrib.postgres.fields import ArrayField
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from django.db.models import Aggregate, BooleanField, JSONField, TextField, Value
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from .mixins import OrderableAggMixin
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__all__ = [
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"ArrayAgg",
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"BitAnd",
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"BitOr",
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"BitXor",
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"BoolAnd",
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"BoolOr",
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"JSONBAgg",
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"StringAgg",
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]
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class ArrayAgg(OrderableAggMixin, Aggregate):
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function = "ARRAY_AGG"
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template = "%(function)s(%(distinct)s%(expressions)s %(order_by)s)"
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allow_distinct = True
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@property
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def output_field(self):
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return ArrayField(self.source_expressions[0].output_field)
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class BitAnd(Aggregate):
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function = "BIT_AND"
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class BitOr(Aggregate):
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function = "BIT_OR"
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class BitXor(Aggregate):
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function = "BIT_XOR"
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class BoolAnd(Aggregate):
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function = "BOOL_AND"
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output_field = BooleanField()
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class BoolOr(Aggregate):
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function = "BOOL_OR"
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output_field = BooleanField()
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class JSONBAgg(OrderableAggMixin, Aggregate):
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function = "JSONB_AGG"
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template = "%(function)s(%(distinct)s%(expressions)s %(order_by)s)"
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allow_distinct = True
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output_field = JSONField()
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class StringAgg(OrderableAggMixin, Aggregate):
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function = "STRING_AGG"
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template = "%(function)s(%(distinct)s%(expressions)s %(order_by)s)"
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allow_distinct = True
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output_field = TextField()
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def __init__(self, expression, delimiter, **extra):
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delimiter_expr = Value(str(delimiter))
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super().__init__(expression, delimiter_expr, **extra)
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