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Django ORM實現(xiàn)按天獲取數(shù)據(jù)去重求和例子

更新時間：2020年05月18日 09:59:55 作者：chenlunju

這篇文章主要介紹了Django ORM實現(xiàn)按天獲取數(shù)據(jù)去重求和例子，具有很好的參考價值，希望對大家有所幫助。一起跟隨小編過來看看吧

我就廢話不多說了，大家還是直接看代碼吧！

def total_data(request):
  data = request_body(request, 'POST')
  if not data:
    return http_return(400, '參數(shù)錯誤')
  # 前端傳入毫秒為單位的時間戳
  startTimestamp = data.get('startTime', '')
  endTimestamp = data.get('endTime', '')

  if startTimestamp and endTimestamp:
    startTimestamp = int(startTimestamp/1000)
    endTimestamp = int(endTimestamp/1000)
  else:
    return http_return(400, '參數(shù)有誤')
  # 小于2019-05-30 00:00:00的時間不合法
  if endTimestamp < startTimestamp or endTimestamp <= 1559145600 or startTimestamp <= 1559145600:
    return http_return(400, '無效時間')
  if startTimestamp and endTimestamp:
    # 給定時間查詢
    startTime = datetime.fromtimestamp(startTimestamp)
    endTime = datetime.fromtimestamp(endTimestamp)
    t1 = datetime(startTime.year, startTime.month, startTime.day)
    t2 = datetime(endTime.year, endTime.month, endTime.day, 23, 59, 59, 999999)
    # 用戶總?cè)藬?shù)
    totalUsers = User.objects.exclude(status='destroy').count()
    # 音頻總數(shù)
    totalAudioStory = AudioStory.objects.filter(isDelete=False).count()
    # 專輯總數(shù)
    totalAlbums = Album.objects.filter(isDelete=False).count()
    # 新增用戶人數(shù)
    newUsers = User.objects.filter(createTime__range=(t1, t2)).exclude(status='destroy').count()
    # 活躍用戶人數(shù)
    activityUsers = LoginLog.objects.filter(createTime__range=(t1, t2), isManager=False).values('userUuid_id').\
      annotate(Count('userUuid_id')).count()
    # 新增音頻數(shù)
    newAudioStory = AudioStory.objects.filter(createTime__range=(t1, t2)).count()

    # 男性
    male = User.objects.filter(gender=1).exclude(status='destroy').count()

    # 女性
    female = User.objects.filter(gender=2).exclude(status='destroy').count()

    # 未知
    unkonwGender = User.objects.filter(gender=0).exclude(status='destroy').count()


    # 模板音頻
    aduioStoryCount = AudioStory.objects.filter(
      isDelete=False, audioStoryType=1, isUpload=1, createTime__range=(t1, t2)).count()

    # 自由錄制
    freedomStoryCount = AudioStory.objects.filter(
      isDelete=False, audioStoryType=0, isUpload=1, createTime__range=(t1, t2)).count()

    # 兒歌
    tags1 = Tag.objects.filter(code="RECORDTYPE", name='兒歌').first()
    tags1Count = tags1.tagsAudioStory.filter(isDelete=False, createTime__range=(t1, t2)).count()   # 兒歌作品數(shù)
    user1Count = tags1.tagsAudioStory.filter(isDelete=False, createTime__range=(t1, t2)).\
      values('userUuid_id').annotate(Count('userUuid_id')).count()                # 錄音類型人數(shù)，去重

    # result = Tag.objects.filter(code="RECORDTYPE").annotate(Count('tagsAudioStory'))

    # 父母學(xué)堂
    tags2 = Tag.objects.filter(code="RECORDTYPE", name='父母學(xué)堂').first()
    tags2Count = tags2.tagsAudioStory.filter(isDelete=False, createTime__range=(t1, t2)).count()
    user2Count = tags2.tagsAudioStory.filter(isDelete=False, createTime__range=(t1, t2)).\
      values('userUuid_id').annotate(Count('userUuid_id')).count()

    # 國學(xué)
    tags3 = Tag.objects.filter(code="RECORDTYPE", name='國學(xué)').first()
    tags3Count = tags3.tagsAudioStory.filter(isDelete=False, createTime__range=(t1, t2)).count()
    user3Count = tags3.tagsAudioStory.filter(isDelete=False, createTime__range=(t1, t2)).\
      values('userUuid_id').annotate(Count('userUuid_id')).count()

    # 英文
    tags4 = Tag.objects.filter(code="RECORDTYPE", name='英文').first()
    tags4Count = tags4.tagsAudioStory.filter(isDelete=False, createTime__range=(t1, t2)).count()
    user4Count = tags4.tagsAudioStory.filter(isDelete=False, createTime__range=(t1, t2)). \
      values('userUuid_id').annotate(Count('userUuid_id')).count()

    # 其他
    tags5 = Tag.objects.filter(code="RECORDTYPE", name='其他').first()
    tags5Count = tags5.tagsAudioStory.filter(isDelete=False, createTime__range=(t1, t2)).count()
    user5Count = tags5.tagsAudioStory.filter(isDelete=False, createTime__range=(t1, t2)).\
      values('userUuid_id').annotate(Count('userUuid_id')).count()

    recordTypePercentage = [
      {'name': '兒歌', 'tagsNum': tags1Count, 'userNum': user1Count},
      {'name': '兒歌', 'tagsNum': tags2Count, 'userNum': user2Count},
      {'name': '國學(xué)', 'tagsNum': tags3Count, 'userNum': user3Count},
      {'name': '英文', 'tagsNum': tags4Count, 'userNum': user4Count},
      {'name': '其他', 'tagsNum': tags5Count, 'userNum': user5Count}
    ]

    # 活躍用戶排行
    data1_list = []
    # result = AudioStory.objects.filter(isDelete=False, createTime__range=(t1, t2)).values('userUuid_id').annotate(Count('userUuid_id'))[:1]
    res = User.objects.annotate(audioStory_count_by_user = Count("useAudioUuid")).order_by('-audioStory_count_by_user')[:5]
    for index,item in enumerate(res.values()):
      data = {
        'orderNum': index+1,
        'name': item['nickName'],
        'recordCount': item['audioStory_count_by_user']
      }
      data1_list.append(data)
    # 熱門錄制排行
    data2_list = []
    res = Story.objects.filter(status="normal", createTime__range=(t1, t2)).order_by('-recordNum')[:5]
    for index,item in enumerate(res.values()):
      data = {
        'orderNum': index + 1 or -1,
        'name': item['name'] or '',
        'recordNum': item['recordNum'] or 0
      }
      data2_list.append(data)

    # 熱門播放排行
    data3_list = []
    audioStory = AudioStory.objects.filter(isDelete=False, createTime__range=(t1, t2)).order_by('-playTimes')[:5]
    for index,item in enumerate(audioStory):
      data = {
        'orderNum': index + 1,
        'name': item.storyUuid.name if item.audioStoryType else item.name,
        'playTimes': item.playTimes
      }
      data3_list.append(data)

    # 圖表數(shù)據(jù)--新增用戶
    graph1 = User.objects.filter(createTime__range=(t1, t2)).\
      extra(select={"time": "DATE_FORMAT(createTime,'%%Y-%%m-%%e')"}).\
      order_by('time').values('time')\
      .annotate(userNum=Count('createTime')).values('time', 'userNum')
    if graph1:
      graph1 = list(graph1)
    else:
      graph1 = []

    # 活躍用戶
    graph2 = LoginLog.objects.filter(createTime__range=(t1, t2), isManager=False). \
      extra(select={"time": "DATE_FORMAT(createTime,'%%Y-%%m-%%e')"}). \
      values('time').annotate(userNum=Count('createTime', distinct=True)).values('time', 'userNum')
    if graph2:
      graph2 = list(graph2)
    else:
      graph2 = []

    return http_return(200, 'OK',
              {
                'totalUsers': totalUsers,      # 總用戶人數(shù)
                'totalAudioStory': totalAudioStory, # 音頻總數(shù)
                'totalAlbums': totalAlbums,     # 總的專輯數(shù)
                'newUsers': newUsers,        # 新增用戶人數(shù)
                'activityUsers': activityUsers,   # 活躍用戶人數(shù)
                'newAudioStory': newAudioStory,   # 新增音頻數(shù)
                'activityUsersRank': data1_list,   # 活躍用戶排行
                'male': male,             # 男性
                'female': female,           # 女性
                'unkonwGender': unkonwGender,    # 未知性別
                'aduioStoryCount': aduioStoryCount, # 模板音頻數(shù)量
                'freedomStoryCount': freedomStoryCount, # 自由錄制音頻數(shù)量
                'recordTypePercentage': recordTypePercentage,
                'hotRecordRank': data2_list,     # 熱門錄制排行
                'hotPlayAudioStoryRank': data3_list,   # 熱門播放排行
                'newUserGraph': graph1,       # 新增用戶折線圖
                'activityUserGraph': graph2,     # 活躍用戶折線圖
              })

補充知識：Django 對符合條件的某個字段進行求和,聚合函數(shù)annotate()

開發(fā)環(huán)境：Ubuntu16.04+Django 1.11.9+Python2.7

對符合條件的某個字段求和　

之前在開發(fā)的時候,有同事問Django是否存在著這樣的方法,可以直接將符合條件的某個字段直接求和.

當(dāng)時不知道這樣的方法是否存在,但是想了想自己解決這類似問題的方法,先用filter將符合條件的取出來,然后進行for循環(huán),取出需要的字段,進行求和.感覺是挺low的,于是一起B(yǎng)aidu,寫代碼測試最后找到了可以求值的方法,聚合函數(shù)annotate().

from django.db.models import Sum
from models import Book
all_price = Book.objects.values('price').annotate(num_books=Sum('price')).filter(author='Yu')
print all_price[0]['num_books']

輸出結(jié)果:650

上面的參數(shù)換個順序,不會出錯但不符合預(yù)期結(jié)果.