新規作成

backend/app/modules/journals/router.py

@@ -0,0 +1,111 @@
+from fastapi import APIRouter, HTTPException
+from pydantic import BaseModel, field_validator
+from typing import List
+from decimal import Decimal, InvalidOperation
+from psycopg.errors import ForeignKeyViolation, CheckViolation
+from app.core.database import get_connection
+
+router = APIRouter(prefix="/journals", tags=["仕訳"])
+
+class JournalLine(BaseModel):
+    account_id: int
+    debit: Decimal = Decimal("0")
+    credit: Decimal = Decimal("0")
+
+    @field_validator("debit", "credit", mode="before")
+    @classmethod
+    def to_decimal(cls, v):
+        # 允许传 0 / 整数 / 字符串
+        try:
+            d = Decimal(str(v))
+        except InvalidOperation:
+            raise ValueError("金額は数値で入力してください")
+        if d < 0:
+            raise ValueError("金額は0以上で入力してください")
+        return d
+
+    @field_validator("credit")
+    @classmethod
+    def exclusive_debit_credit(cls, v, info):
+        # 不能借贷同时 > 0，也不能都为 0 的校验在整体里做
+        return v
+
+class JournalCreate(BaseModel):
+    journal_date: str  # YYYY-MM-DD
+    description: str
+    lines: List[JournalLine]
+
+    @field_validator("journal_date")
+    @classmethod
+    def validate_date(cls, v: str):
+        # 简单校验格式，严格校验可用 datetime.date.fromisoformat
+        if len(v) != 10 or v[4] != "-" or v[7] != "-":
+            raise ValueError("日付はYYYY-MM-DD形式で入力してください")
+        return v
+
+    @field_validator("description")
+    @classmethod
+    def validate_desc(cls, v: str):
+        if not v.strip():
+            raise ValueError("摘要を入力してください")
+        if len(v) > 255:
+            raise ValueError("摘要が長すぎます（255文字以内）")
+        return v
+
+@router.post("/", summary="仕訳登録", status_code=201)
+def create_journal(data: JournalCreate):
+    # 1) 行必須
+    if not data.lines:
+        raise HTTPException(status_code=400, detail="仕訳明細を1行以上入力してください。")
+
+    # 2) 借貸排他 & 非ゼロ
+    for i, l in enumerate(data.lines, start=1):
+        if l.debit > 0 and l.credit > 0:
+            raise HTTPException(status_code=400, detail=f"{i}行目：借方と貸方を同時に入力しないでください。")
+        if l.debit == 0 and l.credit == 0:
+            raise HTTPException(status_code=400, detail=f"{i}行目：金額が未入力です（借方または貸方のどちらかに金額を入力）。")
+
+    # 3) 借貸一致
+    debit_total = sum(l.debit for l in data.lines)
+    credit_total = sum(l.credit for l in data.lines)
+    if debit_total != credit_total:
+        raise HTTPException(status_code=400, detail="借方合計と貸方合計が一致しません。")
+
+    # 4) 仕訳に使う科目が全て存在するか事前チェック
+    account_ids = sorted({l.account_id for l in data.lines})
+    with get_connection() as conn, conn.cursor() as cur:
+        cur.execute(
+            "SELECT account_id FROM accounts WHERE account_id = ANY(%s)",
+            (account_ids,)
+        )
+        found = {row["account_id"] for row in cur.fetchall()}
+        missing = [a for a in account_ids if a not in found]
+        if missing:
+            raise HTTPException(
+                status_code=400,
+                detail=f"存在しない科目IDが含まれています：{missing}"
+            )
+
+        try:
+            # 5) 登録（ヘッダ → 明細）
+            cur.execute(
+                "INSERT INTO journal_entries (journal_date, description) VALUES (%s, %s) RETURNING journal_id",
+                (data.journal_date, data.description),
+            )
+            jid = cur.fetchone()["journal_id"]
+
+            for l in data.lines:
+                cur.execute(
+                    """INSERT INTO journal_lines (journal_id, account_id, debit, credit)
+                       VALUES (%s, %s, %s, %s)""",
+                    (jid, l.account_id, l.debit, l.credit),
+                )
+
+            conn.commit()
+            return {"journal_id": jid}
+
+        except ForeignKeyViolation:
+            # 理论上到不了（我们前面已做存在性检查），兜底
+            raise HTTPException(status_code=400, detail="科目IDが不正です。")
+        except CheckViolation:
+            raise HTTPException(status_code=400, detail="金額の指定が不正です。")