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backend/app/schemas/transaction.py

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+"""Transaction schemas."""
+
+from datetime import datetime
+from decimal import Decimal
+from pydantic import BaseModel, ConfigDict
+
+
+class TransactionBase(BaseModel):
+    app_source: str
+    transaction_type: str
+    amount: Decimal
+    currency: str = "CNY"
+    counterparty_name: str | None = None
+    counterparty_account: str | None = None
+    order_number: str | None = None
+    transaction_time: datetime | None = None
+    remark: str | None = None
+    confidence: str = "medium"
+
+
+class TransactionCreate(TransactionBase):
+    case_id: int
+    screenshot_id: int
+    raw_text: str | None = None
+
+
+class TransactionResponse(TransactionBase):
+    model_config = ConfigDict(from_attributes=True)
+    id: int
+    case_id: int
+    screenshot_id: int
+    raw_text: str | None = None
+    created_at: datetime
+
+
+class TransactionListResponse(BaseModel):
+    items: list[TransactionResponse]
+
+
+class TransactionExtractItem(BaseModel):
+    """Single item as returned by LLM extraction (before DB insert)."""
+    app_source: str
+    transaction_type: str
+    amount: Decimal
+    currency: str = "CNY"
+    counterparty_name: str | None = None
+    counterparty_account: str | None = None
+    order_number: str | None = None
+    transaction_time: datetime | None = None
+    remark: str | None = None
+    confidence: str = "medium"