发布时间:2020-08-13 13:23:27编辑:admin阅读(2467)
有一个用户表,models.py内容如下:
from django.db import models # Create your models here. class User(models.Model): #用户名表 username = models.CharField(max_length=16,verbose_name="用户名") password = models.CharField(max_length=32,verbose_name="密码") create_time = models.DateTimeField(auto_now_add=True,verbose_name="创建时间") last_time = models.DateTimeField(verbose_name="登录时间") class Meta: # 多列唯一索引 unique_together = ('username','create_time')
本文用的是sqlite3数据库,插入初始数据,insert语句如下:
INSERT INTO "main"."application_user" ("id", "username", "password", "create_time", "last_time", "ROWID") VALUES (1, 'xiao1', 1234, '2020-01-01 13:14:52', '2020-01-01 13:14:52', 1); INSERT INTO "main"."application_user" ("id", "username", "password", "create_time", "last_time", "ROWID") VALUES (2, 'xiao2', 1234, '2020-02-02 13:14:52', '2020-02-02 13:14:52', 2); INSERT INTO "main"."application_user" ("id", "username", "password", "create_time", "last_time", "ROWID") VALUES (3, 'xiao3', 1234, '2020-03-03 13:14:52', '2020-03-03 13:14:52', 3); INSERT INTO "main"."application_user" ("id", "username", "password", "create_time", "last_time", "ROWID") VALUES (4, 'xiao4', 1234, '2020-04-04 13:14:52', '2020-04-04 13:14:52', 4); INSERT INTO "main"."application_user" ("id", "username", "password", "create_time", "last_time", "ROWID") VALUES (5, 'xiao5', 1234, '2020-05-05 13:14:52', '2020-05-05 13:14:52', 5); INSERT INTO "main"."application_user" ("id", "username", "password", "create_time", "last_time", "ROWID") VALUES (6, 'xiao6', 1234, '2020-06-06 13:14:52', '2020-06-06 13:14:52', 6); INSERT INTO "main"."application_user" ("id", "username", "password", "create_time", "last_time", "ROWID") VALUES (7, 'xiao7', 1234, '2020-07-07 13:14:52', '2020-07-07 13:14:52', 7); INSERT INTO "main"."application_user" ("id", "username", "password", "create_time", "last_time", "ROWID") VALUES (8, 'xiao8', 1234, '2020-07-23 13:14:52', '2020-07-22 13:14:52', 8); INSERT INTO "main"."application_user" ("id", "username", "password", "create_time", "last_time", "ROWID") VALUES (9, 'xiao9', 1234, '2020-07-24 13:14:52', '2020-07-22 13:14:52', 9);
需求如下:
1. 查询今天,昨天,一周的用户数。
2. 最近一个月,分组统计每一天的数量
3. 最近1年,分组统计每一个月的数量
新建一个项目,名字为:test_rom,应用名称为:application
django版本为:3.0.8
修改时区,内容如下:
TIME_ZONE = 'Asia/Shanghai' USE_I18N = True USE_L10N = True USE_TZ = False
from django.contrib import admin from django.urls import path from application import views urlpatterns = [ path('admin/', admin.site.urls), path('index/', views.index), path('month/', views.month), path('year/', views.year), ]
views.py
from django.shortcuts import render import datetime from application import models from django.http import JsonResponse import time from dateutil.relativedelta import relativedelta from django.db.models.functions import TruncMonth,TruncYear,ExtractYear,ExtractMonth from django.db.models import Count from django.db import connection # Create your views here. def index(request): # 今日############### today = datetime.datetime.now().date() ret = models.User.objects.filter(create_time__gte=str(today) + ' 00:00:00') today_len = len(ret) # 昨天############### yesterday = (datetime.datetime.now() + datetime.timedelta(days=-1)).date() ret = models.User.objects.filter(create_time__gte=str(yesterday) + ' 00:00:00', create_time__lte=str(today) + ' 23:59:59') yesterday_len = len(ret) # 一周前 today = datetime.datetime.now().date() weekdelta = datetime.datetime.now().date() - datetime.timedelta(weeks=1) ret = models.User.objects.filter(create_time__gte=str(weekdelta) + ' 00:00:00', create_time__lte=str(today) + ' 23:59:59') week_len = len(ret) # 总数量 ret = models.User.objects.all() total_len = len(ret) data = { "today": today_len, "yesterday": yesterday_len, "week": week_len, "total": total_len } return JsonResponse(data) def month(request): # 当前年,月 this_year = time.strftime("%Y", time.localtime(time.time())) this_month = time.strftime("%m", time.localtime(time.time())) # 按天分组 select = {'day': connection.ops.date_trunc_sql('day', 'create_time')} count_data = models.User.objects.filter(create_time__year=this_year, create_time__month=this_month).extra( select=select).values('day').annotate(number=Count('id')) x_list = [] y_list = [] for i in count_data: x_list.append(i['day']) y_list.append(i['number']) data = {"x": x_list, "y": y_list} return JsonResponse(data) def year(request): # 计算时间 time_ago = datetime.datetime.now() - relativedelta(years=1) # print("time_ago",time_ago) # 获取近一年数据 one_year_data = models.User.objects.filter(create_time__gte=time_ago) # 分组统计每个月的数据 count_res = one_year_data \ .annotate(year=ExtractYear('create_time'), month=ExtractMonth('create_time')) \ .values('year', 'month').order_by('year', 'month').annotate(count=Count('id')) # 封装数据格式 month_list = [] count_list = [] for i in count_res: month_list.append("%s-%s" % (i['year'], i['month'])) count_list.append(i["count"]) data = {"month": month_list, "count": count_list} return JsonResponse(data)
使用Pycharm直接启动即可,访问首页:
http://127.0.0.1:8001/index/
效果如下:
访问最近一个月分组数据
http://127.0.0.1:8001/month/
效果如下:
访问最近一年的分组数据
http://127.0.0.1:8001/year/
效果如下:
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