对冲管理新增品种筛选，合约下拉去掉品种前缀

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

ft-app/app/routers/positions.py

@@ -3,7 +3,7 @@ from fastapi import APIRouter, Depends, Form, Request
 from fastapi.responses import HTMLResponse, RedirectResponse
 from sqlalchemy.orm import Session
 from app.database import get_db
-from app.models import Round, Position, Contract
+from app.models import Round, Position, Contract, Product
 
 router = APIRouter(prefix="/positions", tags=["positions"])
 
@@ -18,6 +18,16 @@ def get_active_contracts(db: Session) -> list[str]:
     return [c[0] for c in contracts]
 
 
+def get_product_contracts(db: Session) -> dict:
+    result: dict[str, list[str]] = {}
+    products = db.query(Product).order_by(Product.code).all()
+    for p in products:
+        codes = [c.code for c in p.contracts if c.is_active]
+        if codes:
+            result[p.code] = codes
+    return result
+
+
 @router.get("/", response_class=HTMLResponse)
 def positions_page(request: Request, db: Session = Depends(get_db)):
     active_rounds = (
@@ -33,6 +43,7 @@ def positions_page(request: Request, db: Session = Depends(get_db)):
             request=request,
             active_nav="positions",
             contracts=get_active_contracts(db),
+            product_contracts=get_product_contracts(db),
             active_rounds=active_rounds,
         )
     )

ft-app/app/templates/positions.html

@@ -16,15 +16,21 @@
 <div class="form-card" style="margin-bottom:28px;">
   <form method="post" action="/positions/round">
     <div style="display:flex;gap:12px;align-items:flex-end;flex-wrap:wrap;">
-      <div class="form-group" style="margin-bottom:0;flex:1;min-width:140px;">
+      <div class="form-group" style="margin-bottom:0;flex:1;min-width:100px;">
-        <label>合约</label>
+        <label>品种</label>
-        <select name="contract_code" required>
+        <select id="productSelect" required onchange="filterContracts()">
-          <option value="">-- 选择合约 --</option>
+          <option value="">--</option>
-          {% for c in contracts %}
+          {% for pcode in product_contracts %}
-          <option value="{{ c }}">{{ c }}</option>
+          <option value="{{ pcode }}">{{ pcode }}</option>
           {% endfor %}
         </select>
       </div>
+      <div class="form-group" style="margin-bottom:0;flex:1;min-width:120px;">
+        <label>合约</label>
+        <select name="contract_code" id="contractSelect" required disabled>
+          <option value="">-- 先选品种 --</option>
+        </select>
+      </div>
       <div class="form-group" style="margin-bottom:0;flex:1;min-width:100px;">
         <label>每日手数 N</label>
         <input type="number" name="daily_hands" value="1" min="1" max="10" required>
@@ -161,4 +167,19 @@
 </div>
 {% endfor %}
 
+<script>
+var productContracts = {{ product_contracts | tojson }};
+function filterContracts() {
+  var prod = document.getElementById('productSelect').value;
+  var sel = document.getElementById('contractSelect');
+  sel.innerHTML = '<option value="">-- 选择合约 --</option>';
+  sel.disabled = !prod;
+  if (prod && productContracts[prod]) {
+    productContracts[prod].forEach(function(c) {
+      var display = c.startsWith(prod) ? c.substring(prod.length) : c;
+      sel.innerHTML += '<option value="' + c + '">' + display + '</option>';
+    });
+  }
+}
+</script>
 {% endblock %}

ft-app/app/templates/trades.html

@@ -211,7 +211,8 @@ function filterContracts() {
   sel.disabled = !prod;
   if (prod && productContracts[prod]) {
     productContracts[prod].forEach(function(c) {
-      sel.innerHTML += '<option value="' + c + '">' + c + '</option>';
+      var display = c.startsWith(prod) ? c.substring(prod.length) : c;
+      sel.innerHTML += '<option value="' + c + '">' + display + '</option>';
     });
   }
 }