数据管理添加时间的显示和统计报表的功能[0.2.7.6][ci]

elastic/es_connect.py

@@ -307,7 +307,8 @@ def search_data(query):
                 "_id": hit.meta.id,
                 "writer_id": hit.writer_id,
                 "data": hit.data,
-                "image": hit.image
+                "image": hit.image,
+                "time": getattr(hit, "time", None),
             })
         
         return results
@@ -328,7 +329,8 @@ def search_all():
                 "_id": hit.meta.id,
                 "writer_id": hit.writer_id,
                 "data": hit.data,
-                "image": hit.image
+                "image": hit.image,
+                "time": getattr(hit, "time", None),
             })
         
         return results
@@ -435,7 +437,8 @@ def search_by_any_field(keyword):
                 "_id": hit.meta.id,
                 "writer_id": hit.writer_id,
                 "data": hit.data,
-                "image": hit.image
+                "image": hit.image,
+                "time": getattr(hit, "time", None),
             })
         
         return results

elastic/templates/elastic/manage.html

@@ -81,6 +81,8 @@
         <input type="text" id="searchQuery" class="search-input" placeholder="请输入搜索关键词...">
         <select id="keyFilter" class="search-input"></select>
         <button class="btn" onclick="clearKeyFilter()">清空Key筛查</button>
+        <select id="typeFilter" class="search-input"></select>
+        <button class="btn" onclick="clearTypeFilter()">清空类型筛查</button>
         <button class="btn btn-primary" onclick="performSearch('exact')">关键词搜索</button>
         <button class="btn btn-secondary" onclick="performSearch('fuzzy')">模糊搜索</button>
         <button class="btn" onclick="loadAllData()">显示全部</button>
@@ -93,12 +95,31 @@
       </div>
     </div>
 
+    {% if is_admin or has_manage_key %}
+    <div class="search-container" style="margin-top: 12px;">
+      <div style="font-weight: 600; margin-bottom: 8px;">统计报表</div>
+      <div class="search-controls" style="flex-wrap: wrap;">
+        <input type="datetime-local" id="reportFrom" class="search-input" placeholder="开始时间">
+        <input type="datetime-local" id="reportTo" class="search-input" placeholder="结束时间">
+        <select id="reportInterval" class="search-input">
+          <option value="day">按天</option>
+          <option value="week">按周</option>
+          <option value="month">按月</option>
+        </select>
+        <button class="btn btn-primary" onclick="generateReport()">生成报表</button>
+        <button class="btn" onclick="downloadReportCsv()">下载CSV</button>
+      </div>
+      <div id="reportBox" class="search-result" style="display: none; margin-top: 10px;"></div>
+    </div>
+    {% endif %}
+
     <!-- 数据表格 -->
     <table id="dataTable">
       <thead>
         <tr>
           <th>图片</th>
           <th>数据</th>
+          <th>时间</th>
           <th>录入人</th>
           <th>操作</th>
         </tr>
@@ -153,6 +174,11 @@ function getCookie(name) {
 // DOM元素引用
 const searchQueryInput = document.getElementById('searchQuery');
 const keyFilterSelect = document.getElementById('keyFilter');
+const typeFilterSelect = document.getElementById('typeFilter');
+const reportFromInput = document.getElementById('reportFrom');
+const reportToInput = document.getElementById('reportTo');
+const reportIntervalSelect = document.getElementById('reportInterval');
+const reportBox = document.getElementById('reportBox');
 const searchResultDiv = document.getElementById('searchResult');
 const searchStatus = document.getElementById('searchStatus');
 const searchCount = document.getElementById('searchCount');
@@ -173,6 +199,9 @@ const zoomOutBtn = document.getElementById('zoomOutBtn');
 const resetZoomBtn = document.getElementById('resetZoomBtn');
 const zoomValue = document.getElementById('zoomValue');
 
+const IS_ADMIN = {{ is_admin|yesno:"true,false" }};
+const HAS_MANAGE_KEY = {{ has_manage_key|yesno:"true,false" }};
+
 // 全局变量
 let currentId = '';
 let currentWriter = '';
@@ -182,6 +211,7 @@ let currentSearchQuery = ''; // 记录当前搜索查询
 let isFuzzySearch = false; // 记录当前是否为模糊搜索
 let isDeleting = false; // 标记是否正在删除
 let currentKeyFilter = '';
+let currentTypeFilter = '';
 
 // 图片缩放相关变量
 let currentScale = 1;
@@ -205,6 +235,10 @@ async function performSearch(type) {
     currentKeyFilter = '';
     if (keyFilterSelect) keyFilterSelect.value = '';
   }
+  if (currentTypeFilter) {
+    currentTypeFilter = '';
+    if (typeFilterSelect) typeFilterSelect.value = '';
+  }
 
   currentSearchQuery = query;
   isFuzzySearch = type === 'fuzzy';
@@ -270,11 +304,11 @@ async function loadAllData() {
   showSearchLoading();
 
   try {
-    if (currentKeyFilter) {
+    if (currentKeyFilter || currentTypeFilter) {
-      const response = await fetch(`/elastic/filter-by-key/?key=${encodeURIComponent(currentKeyFilter)}`);
+      const response = await fetch(`/elastic/filter/?key=${encodeURIComponent(currentKeyFilter)}&type=${encodeURIComponent(currentTypeFilter)}`);
       const data = await response.json();
       if (data.status === 'success') {
-        displayAllData(data.data || [], currentKeyFilter);
+        displayAllData(data.data || [], currentKeyFilter, currentTypeFilter);
       } else {
         showSearchMessage(`加载数据失败: ${data.message || '未知错误'}`, 'error');
       }
@@ -306,7 +340,10 @@ async function loadAllData() {
 function displayAllData(data, key) {
   searchResultDiv.style.display = 'block';
   searchResultDiv.className = 'search-result';
-  searchStatus.textContent = key ? `按Key筛查：${key}` : '显示全部数据';
+  const labels = [];
+  if (key) labels.push(`Key：${key}`);
+  if (currentTypeFilter) labels.push(`类型：${currentTypeFilter}`);
+  searchStatus.textContent = labels.length ? `筛查：${labels.join('，')}` : '显示全部数据';
   searchCount.textContent = `共 ${data.length} 条记录`;
 
   renderTable(data);
@@ -318,7 +355,7 @@ function clearSearch() {
   searchResultDiv.style.display = 'none';
   currentSearchQuery = '';
 
-  if (currentKeyFilter) {
+  if (currentKeyFilter || currentTypeFilter) {
     loadAllData();
     return;
   }
@@ -359,13 +396,119 @@ function clearKeyFilter() {
   loadAllData();
 }
 
+async function initTypeFilter() {
+  if (!typeFilterSelect) return;
+  typeFilterSelect.innerHTML = '<option value="">全部类型</option>';
+  try {
+    const resp = await fetch('/elastic/types-for-filter/', { credentials: 'same-origin' });
+    const data = await resp.json();
+    if (data.status !== 'success') return;
+    const types = data.data || [];
+    types.forEach(t => {
+      const opt = document.createElement('option');
+      opt.value = String(t || '');
+      opt.textContent = String(t || '');
+      typeFilterSelect.appendChild(opt);
+    });
+  } catch (e) {
+  }
+  typeFilterSelect.addEventListener('change', () => {
+    currentTypeFilter = (typeFilterSelect.value || '').trim();
+    loadAllData();
+  });
+}
+
+function clearTypeFilter() {
+  currentTypeFilter = '';
+  if (typeFilterSelect) typeFilterSelect.value = '';
+  loadAllData();
+}
+
+function buildReportParams() {
+  const params = new URLSearchParams();
+  if (currentKeyFilter) params.set('key', currentKeyFilter);
+  if (currentTypeFilter) params.set('type', currentTypeFilter);
+  const iv = (reportIntervalSelect && reportIntervalSelect.value) ? reportIntervalSelect.value : 'day';
+  params.set('interval', iv);
+  const fromVal = reportFromInput ? (reportFromInput.value || '').trim() : '';
+  const toVal = reportToInput ? (reportToInput.value || '').trim() : '';
+  if (fromVal) params.set('from', fromVal);
+  if (toVal) params.set('to', toVal);
+  return params;
+}
+
+async function generateReport() {
+  if (!reportBox) return;
+  reportBox.style.display = 'block';
+  reportBox.className = 'search-result';
+  reportBox.innerHTML = '<div>正在生成报表...</div>';
+  try {
+    const params = buildReportParams();
+    const resp = await fetch(`/elastic/report/?${params.toString()}`, { credentials: 'same-origin' });
+    const data = await resp.json();
+    if (data.status !== 'success') {
+      reportBox.className = 'search-result error';
+      reportBox.innerHTML = `<div>生成失败：${data.message || '未知错误'}</div>`;
+      return;
+    }
+    const r = data.data || {};
+    const total = r.total || 0;
+    const byType = r.by_type || [];
+    const byTime = r.by_time || [];
+    const rng = r.range || {};
+    const flt = r.filters || {};
+    const lines = [];
+    const filterParts = [];
+    if (flt.key) filterParts.push(`Key：${flt.key}`);
+    if (flt.type) filterParts.push(`类型：${flt.type}`);
+    if (flt.interval) filterParts.push(`粒度：${flt.interval}`);
+    lines.push(`<div style="font-weight: 600;">总数：${total}</div>`);
+    if (rng.from || rng.to) {
+      lines.push(`<div class="muted" style="margin-top: 4px;">时间范围：${(rng.from || '')} ~ ${(rng.to || '')}</div>`);
+    }
+    if (filterParts.length) {
+      lines.push(`<div class="muted" style="margin-top: 4px;">筛查：${filterParts.join('，')}</div>`);
+    }
+
+    const typeRows = byType.map(it => `<tr><td style="padding:4px 8px;">${it.type || ''}</td><td style="padding:4px 8px; text-align:right;">${it.count || 0}</td></tr>`).join('');
+    const timeRows = byTime.map(it => `<tr><td style="padding:4px 8px;">${it.bucket || ''}</td><td style="padding:4px 8px; text-align:right;">${it.count || 0}</td></tr>`).join('');
+
+    lines.push(`<div style="display:flex; gap:12px; flex-wrap: wrap; margin-top: 10px;">
+      <div style="min-width: 260px; flex: 1;">
+        <div style="font-weight: 600; margin-bottom: 6px;">按成果类型</div>
+        <table style="width:100%; border-collapse: collapse;">
+          <thead><tr><th style="text-align:left; padding:4px 8px; border-bottom:1px solid #eee;">类型</th><th style="text-align:right; padding:4px 8px; border-bottom:1px solid #eee;">数量</th></tr></thead>
+          <tbody>${typeRows || '<tr><td colspan="2" class="muted" style="padding:6px 8px;">暂无</td></tr>'}</tbody>
+        </table>
+      </div>
+      <div style="min-width: 260px; flex: 1;">
+        <div style="font-weight: 600; margin-bottom: 6px;">按时间</div>
+        <table style="width:100%; border-collapse: collapse;">
+          <thead><tr><th style="text-align:left; padding:4px 8px; border-bottom:1px solid #eee;">时间</th><th style="text-align:right; padding:4px 8px; border-bottom:1px solid #eee;">数量</th></tr></thead>
+          <tbody>${timeRows || '<tr><td colspan="2" class="muted" style="padding:6px 8px;">暂无</td></tr>'}</tbody>
+        </table>
+      </div>
+    </div>`);
+
+    reportBox.innerHTML = lines.join('');
+  } catch (e) {
+    reportBox.className = 'search-result error';
+    reportBox.innerHTML = `<div>生成失败：${e.message || '未知错误'}</div>`;
+  }
+}
+
+function downloadReportCsv() {
+  const params = buildReportParams();
+  window.location.href = `/elastic/report/csv/?${params.toString()}`;
+}
+
 // 渲染表格
 function renderTable(data) {
   tableBody.innerHTML = '';
 
   if (!data || data.length === 0) {
     const row = document.createElement('tr');
-    row.innerHTML = '<td colspan="4" style="text-align: center; color: #999;">暂无数据</td>';
+    row.innerHTML = '<td colspan="5" style="text-align: center; color: #999;">暂无数据</td>';
     tableBody.appendChild(row);
     return;
   }
@@ -422,6 +565,7 @@ function renderTable(data) {
       <td>
         ${displayData}
       </td>
+      <td style="font-size: 12px; white-space: nowrap;">${formatDateTime(item.time)}</td>
       <td style="font-size: 12px;">${item.writer_name || item.writer_id || ''}</td>
       <td>
         <button class="btn btn-primary" onclick="openEdit('${item._id || item.id}')">编辑</button>
@@ -432,6 +576,18 @@ function renderTable(data) {
   });
 }
 
+function formatDateTime(t) {
+  if (!t) return '';
+  try {
+    const d = new Date(t);
+    if (String(d) === 'Invalid Date') return String(t);
+    const pad = n => String(n).padStart(2, '0');
+    return `${d.getFullYear()}-${pad(d.getMonth() + 1)}-${pad(d.getDate())} ${pad(d.getHours())}:${pad(d.getMinutes())}`;
+  } catch (e) {
+    return String(t);
+  }
+}
+
 function buildImageCell(item) {
   const urls = Array.isArray(item.image_urls) ? item.image_urls : (item.image_url ? [item.image_url] : []);
   if (!urls.length) return '无图片';
@@ -667,6 +823,18 @@ async function doDelete(id){
 // 页面加载时自动加载所有数据
 document.addEventListener('DOMContentLoaded', function() {
   initKeyFilter();
+  initTypeFilter();
+  if (reportFromInput && reportToInput && reportIntervalSelect) {
+    const now = new Date();
+    const pad = n => String(n).padStart(2, '0');
+    const toLocal = d => `${d.getFullYear()}-${pad(d.getMonth() + 1)}-${pad(d.getDate())}T${pad(d.getHours())}:${pad(d.getMinutes())}`;
+    if (!reportToInput.value) reportToInput.value = toLocal(now);
+    if (!reportFromInput.value) {
+      const from = new Date(now.getTime() - 30 * 24 * 60 * 60 * 1000);
+      reportFromInput.value = toLocal(from);
+    }
+    if (!reportIntervalSelect.value) reportIntervalSelect.value = 'day';
+  }
   loadAllData();
 });
 

elastic/urls.py

@@ -19,6 +19,10 @@ urlpatterns = [
     path('all-data/', views.get_all_data, name='get_all_data'),
     path('filter-by-key/', views.filter_by_key, name='filter_by_key'),
     path('keys-for-filter/', views.keys_for_filter_view, name='keys_for_filter'),
+    path('types-for-filter/', views.types_for_filter_view, name='types_for_filter'),
+    path('filter/', views.filter_view, name='filter'),
+    path('report/', views.report_view, name='report'),
+    path('report/csv/', views.report_csv_view, name='report_csv'),
     
     # 用户管理
     path('users/', views.get_users, name='get_users'),

elastic/views.py

@@ -6,10 +6,12 @@ import re
 import uuid
 import base64
 import json
+import csv
+import io
 import tempfile
 import concurrent.futures
 from django.conf import settings
-from django.http import JsonResponse
+from django.http import JsonResponse, HttpResponse
 from django.shortcuts import render
 from django.views.decorators.http import require_http_methods
 from django.views.decorators.csrf import ensure_csrf_cookie
@@ -953,6 +955,7 @@ def manage_page(request):
 
     me = get_user_by_id(session_user_id) or {}
     is_admin = int(request.session.get("permission", 1)) == 0
+    has_manage_key = bool(me.get("manage_key") or [])
     if is_admin:
         raw_results = search_all()
     else:
@@ -980,6 +983,7 @@ def manage_page(request):
         "elastic/manage.html",
         {
             "is_admin": is_admin,
+            "has_manage_key": has_manage_key,
             "user_id": session_user_id,
             "username": me.get("username"),
         },
@@ -1428,6 +1432,293 @@ def keys_for_filter_view(request):
             add(out, seen, v)
     return JsonResponse({"status": "success", "data": out})
 
+
+def _extract_type_from_data(value):
+    s = value
+    if s is None:
+        return ""
+    if not isinstance(s, str):
+        try:
+            s = json.dumps(s, ensure_ascii=False)
+        except Exception:
+            s = str(s)
+    s = str(s)
+    try:
+        obj = json.loads(s)
+        if isinstance(obj, dict):
+            t = obj.get("数据类型")
+            if isinstance(t, str) and t.strip():
+                return t.strip()
+    except Exception:
+        pass
+    try:
+        m = re.search(r'"数据类型"\s*:\s*"([^"]+)"', s)
+        if m:
+            return str(m.group(1)).strip()
+    except Exception:
+        pass
+    return ""
+
+
+@require_http_methods(["GET"])
+def types_for_filter_view(request):
+    uid = request.session.get("user_id")
+    if uid is None:
+        return JsonResponse({"status": "error", "message": "未登录"}, status=401)
+    try:
+        types = [str(t).strip() for t in (get_type_list() or []) if str(t).strip()]
+    except Exception:
+        types = []
+    seen = set()
+    out = []
+    for t in types:
+        if t in seen:
+            continue
+        seen.add(t)
+        out.append(t)
+    return JsonResponse({"status": "success", "data": out})
+
+
+@require_http_methods(["GET"])
+def filter_view(request):
+    session_user_id = request.session.get("user_id")
+    if session_user_id is None:
+        return JsonResponse({"status": "error", "message": "未登录"}, status=401)
+
+    key = (request.GET.get("key") or "").strip()
+    typ = (request.GET.get("type") or "").strip()
+
+    results = search_all()
+    results = _filter_results_for_user(request, results)
+
+    filtered = list(results or [])
+
+    if key:
+        selected = str(key).strip()
+        try:
+            users = get_all_users() or []
+        except Exception:
+            users = []
+        writer_keys_by_id = {}
+        for u in users:
+            try:
+                u_id = str(u.get("user_id", "")).strip()
+            except Exception:
+                u_id = ""
+            if not u_id:
+                continue
+            try:
+                u_keys = {str(k).strip() for k in (u.get("key") or []) if str(k).strip()}
+            except Exception:
+                u_keys = set()
+            writer_keys_by_id[u_id] = u_keys
+
+        tmp = []
+        for r in filtered:
+            writer_id = str(r.get("writer_id", "")).strip()
+            writer_keys = writer_keys_by_id.get(writer_id)
+            if writer_keys and selected in writer_keys:
+                tmp.append(r)
+                continue
+            if selected and selected in str(r.get("data", "")):
+                tmp.append(r)
+        filtered = tmp
+
+    if typ:
+        tsel = str(typ).strip()
+        filtered = [r for r in filtered if _extract_type_from_data(r.get("data")) == tsel]
+
+    data = _attach_writer_names(_attach_image_urls(request, filtered))
+    return JsonResponse({"status": "success", "data": data})
+
+
+def _parse_dt(value):
+    if not value:
+        return None
+    if hasattr(value, "isoformat"):
+        try:
+            dt = value
+            if getattr(dt, "tzinfo", None) is None:
+                dt = dt.replace(tzinfo=timezone.utc)
+            return dt
+        except Exception:
+            pass
+    s = str(value).strip()
+    if not s:
+        return None
+    if s.endswith("Z"):
+        s = s[:-1] + "+00:00"
+    try:
+        dt = datetime.fromisoformat(s)
+        if getattr(dt, "tzinfo", None) is None:
+            dt = dt.replace(tzinfo=timezone.utc)
+        return dt
+    except Exception:
+        return None
+
+
+def _floor_dt(dt, interval: str):
+    if not dt:
+        return None
+    iv = str(interval or "day").strip().lower()
+    if iv == "month":
+        return dt.replace(day=1, hour=0, minute=0, second=0, microsecond=0)
+    if iv == "week":
+        base = dt.replace(hour=0, minute=0, second=0, microsecond=0)
+        return base - timedelta(days=base.weekday())
+    return dt.replace(hour=0, minute=0, second=0, microsecond=0)
+
+
+def _dt_label(dt, interval: str):
+    if not dt:
+        return ""
+    iv = str(interval or "day").strip().lower()
+    if iv == "month":
+        return dt.strftime("%Y-%m")
+    return dt.strftime("%Y-%m-%d")
+
+
+@require_http_methods(["GET"])
+def report_view(request):
+    session_user_id = request.session.get("user_id")
+    if session_user_id is None:
+        return JsonResponse({"status": "error", "message": "未登录"}, status=401)
+    is_admin = int(request.session.get("permission", 1)) == 0
+    me = get_user_by_id(session_user_id) or {}
+    has_manage_key = bool(me.get("manage_key") or [])
+    if (not is_admin) and (not has_manage_key):
+        return JsonResponse({"status": "error", "message": "无权限"}, status=403)
+
+    gte = (request.GET.get("from") or "").strip()
+    lte = (request.GET.get("to") or "").strip()
+    interval = (request.GET.get("interval") or "day").strip()
+    key = (request.GET.get("key") or "").strip()
+    typ = (request.GET.get("type") or "").strip()
+
+    gte_dt = _parse_dt(gte) if gte else None
+    lte_dt = _parse_dt(lte) if lte else None
+
+    results = search_all()
+    results = _filter_results_for_user(request, results)
+    filtered = list(results or [])
+
+    if key:
+        selected = str(key).strip()
+        try:
+            users = get_all_users() or []
+        except Exception:
+            users = []
+        writer_keys_by_id = {}
+        for u in users:
+            try:
+                u_id = str(u.get("user_id", "")).strip()
+            except Exception:
+                u_id = ""
+            if not u_id:
+                continue
+            try:
+                u_keys = {str(k).strip() for k in (u.get("key") or []) if str(k).strip()}
+            except Exception:
+                u_keys = set()
+            writer_keys_by_id[u_id] = u_keys
+
+        tmp = []
+        for r in filtered:
+            writer_id = str(r.get("writer_id", "")).strip()
+            writer_keys = writer_keys_by_id.get(writer_id)
+            if writer_keys and selected in writer_keys:
+                tmp.append(r)
+                continue
+            if selected and selected in str(r.get("data", "")):
+                tmp.append(r)
+        filtered = tmp
+
+    if typ:
+        tsel = str(typ).strip()
+        filtered = [r for r in filtered if _extract_type_from_data(r.get("data")) == tsel]
+
+    ranged = []
+    for r in filtered:
+        t = _parse_dt(r.get("time"))
+        if (gte_dt or lte_dt) and (t is None):
+            continue
+        if gte_dt and t and t < gte_dt:
+            continue
+        if lte_dt and t and t > lte_dt:
+            continue
+        rr = dict(r)
+        rr["_time_dt"] = t
+        ranged.append(rr)
+
+    by_type = {}
+    by_bucket = {}
+    for r in ranged:
+        tval = _extract_type_from_data(r.get("data"))
+        if tval:
+            by_type[tval] = by_type.get(tval, 0) + 1
+        bucket_dt = _floor_dt(r.get("_time_dt"), interval)
+        if bucket_dt:
+            label = _dt_label(bucket_dt, interval)
+            if label:
+                by_bucket[label] = by_bucket.get(label, 0) + 1
+
+    by_type_arr = [{"type": k, "count": int(v)} for k, v in sorted(by_type.items(), key=lambda x: (-x[1], x[0]))]
+    by_time_arr = [{"bucket": k, "count": int(v)} for k, v in sorted(by_bucket.items(), key=lambda x: x[0])]
+
+    return JsonResponse(
+        {
+            "status": "success",
+            "data": {
+                "generated_at": datetime.now(timezone.utc).isoformat(),
+                "range": {"from": gte or "", "to": lte or ""},
+                "filters": {"key": key or "", "type": typ or "", "interval": interval or "day"},
+                "total": len(ranged),
+                "by_type": by_type_arr,
+                "by_time": by_time_arr,
+            },
+        }
+    )
+
+
+@require_http_methods(["GET"])
+def report_csv_view(request):
+    resp = report_view(request)
+    if getattr(resp, "status_code", 200) != 200:
+        return resp
+    try:
+        payload = json.loads(resp.content.decode("utf-8"))
+    except Exception:
+        return JsonResponse({"status": "error", "message": "生成失败"}, status=500)
+    data = (payload or {}).get("data") or {}
+
+    buf = io.StringIO()
+    w = csv.writer(buf)
+    w.writerow(["统计报表"])
+    w.writerow(["生成时间", data.get("generated_at", "")])
+    rng = data.get("range") or {}
+    w.writerow(["时间范围", f"{rng.get('from','')} ~ {rng.get('to','')}"])
+    flt = data.get("filters") or {}
+    w.writerow(["筛查Key", flt.get("key", "")])
+    w.writerow(["筛查类型", flt.get("type", "")])
+    w.writerow(["时间粒度", flt.get("interval", "")])
+    w.writerow([])
+    w.writerow(["总数", data.get("total", 0)])
+    w.writerow([])
+    w.writerow(["按成果类型统计"])
+    w.writerow(["类型", "数量"])
+    for it in list(data.get("by_type") or []):
+        w.writerow([it.get("type", ""), it.get("count", 0)])
+    w.writerow([])
+    w.writerow(["按时间统计"])
+    w.writerow(["时间", "数量"])
+    for it in list(data.get("by_time") or []):
+        w.writerow([it.get("bucket", ""), it.get("count", 0)])
+
+    content = buf.getvalue()
+    out = HttpResponse(content, content_type="text/csv; charset=utf-8")
+    out["Content-Disposition"] = 'attachment; filename="report.csv"'
+    return out
+
 @require_http_methods(["POST"])
 @csrf_protect
 def revoke_registration_code_view(request):