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這篇文章主要講解了Django ORM如何實(shí)現(xiàn)按天獲取數(shù)據(jù)去重求和，內(nèi)容清晰明了，對此有興趣的小伙伴可以學(xué)習(xí)一下，相信大家閱讀完之后會有幫助。
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
graph2 = 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 graph2:
graph2 = list(graph2)
else:
graph2 = []
# 活躍用戶
graph3 = 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 graph3:
graph3 = list(graph3)
else:
graph3 = []
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': graph2, # 新增用戶折線圖
'activityUserGraph': graph3, # 活躍用戶折線圖
})補(bǔ)充知識：Django 對符合條件的某個字段進(jìn)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(jìn)行for循環(huán),取出需要的字段,進(jìn)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.
all_price = Book.objects.annotate(num_books=Sum('price')).filter(author='Yu').values('price')
print all_youxibi[0]['num_books']
輸出結(jié)果:'nums_book'
看完上述內(nèi)容，是不是對Django ORM如何實(shí)現(xiàn)按天獲取數(shù)據(jù)去重求和有進(jìn)一步的了解，如果還想學(xué)習(xí)更多內(nèi)容，歡迎關(guān)注億速云行業(yè)資訊頻道。
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