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48 lines
2.2 KiB
Python
48 lines
2.2 KiB
Python
from django.core.exceptions import ValidationError
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from django.db import models
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from apps.common.models import BaseModel
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from apps.common.readable_ids import save_with_readable_id
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class KnowledgeSource(models.TextChoices):
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MANUAL = "Manual"
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CASE = "Case"
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class Knowledge(BaseModel):
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knowledge_id = models.CharField(max_length=32, unique=True, editable=False, db_index=True, blank=True, default="", help_text="Record ID e.g. knowledge_000001 (记录 ID e.g. knowledge_000001)")
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title = models.CharField(max_length=500, blank=True, default="", help_text="Knowledge title (知识标题)")
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body = models.TextField(blank=True, default="", help_text="Knowledge content (知识内容)")
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expires_at = models.DateTimeField(null=True, blank=True, help_text="Knowledge expiration time; empty means permanently valid (知识过期时间，空表示永久有效)")
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source = models.CharField(max_length=20, choices=KnowledgeSource, blank=True, default="", help_text="Knowledge source (知识来源)")
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tags = models.JSONField(default=list, blank=True, help_text="Knowledge tags (知识标签)")
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case = models.OneToOneField(
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"cases.Case",
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null=True,
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blank=True,
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on_delete=models.SET_NULL,
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related_name="extracted_knowledge",
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help_text="Case this Knowledge was extracted from; empty for manual Knowledge (知识提取来源 Case, 手动知识为空)",
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)
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class Meta:
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db_table = "knowledge"
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ordering = ["-created_at"]
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indexes = [
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models.Index(fields=["created_at", "source"], name="knowledge_created_src_idx"),
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]
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def save(self, *args, **kwargs):
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return save_with_readable_id(self, "knowledge_id", "knowledge", *args, **kwargs)
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def clean(self):
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super().clean()
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if self.source == KnowledgeSource.CASE and self.case_id is None:
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raise ValidationError({"case": "Case-derived knowledge requires a case."})
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if self.source == KnowledgeSource.MANUAL and self.case_id is not None:
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raise ValidationError({"case": "Manual knowledge cannot be linked to a case."})
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def __str__(self):
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return self.title or str(self.id)
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