models | 易学教程

Django class overrides fails System check

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问题 I am trying to upgrade from Django 1.7.1 to 1.8 on my dev env. I seem to be having an issue with one of my models, I think a core file got upgraded and its messing with my model. I cant seem to figure out what's causing it to die. This is the only error I get when I attempt to run a manage.py test CommandError: System check identified some issues: ERRORS: graphite_alerts.CheckResults: (models.E020) The 'CheckResults.check()' class method is currently overridden by <django.db.models.fields

Rails App with 3 different types of Users

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问题 I'm now in the design phase of application. Mostly doing stuff on the paper to get the insight of the application models, define what I will need and so on. And I found there one problem, which I don't know how to solve, or be more specific, I don't know how to implement it to keep it dry. So here is the deal: I have application where will be three different types of users/accounts: Regular account - Account has basic profile with basic rights in the application, User with regular account can

<转载>用c++去访问tensorflow模型

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原创 OpenCV调用TensorFlow预训练模型置顶 2018-06-07 12:27:31 pan_jinquan 阅读数 20053 收藏文章标签： OpenCV调用TesorFlow训练好的模型 OpenCV调用TesorFlow模型 readNetFromTensorflow opencv调用pb模型 OpenCV dnn 更多分类专栏： OpenCV TensoFlow 深度学习版权声明：本文为博主原创文章，遵循 CC 4.0 BY-SA 版权协议，转载请附上原文出处链接和本声明。本文链接： https://blog.csdn.net/guyuealian/article/details/80570120 OpenCV调用TensorFlow预训练模型【尊重原创，转载请注明出处】 https://blog.csdn.net/guyuealian/article/details/80570120 强大OpenCV从自OpenCV 3.1版以来，dnn模块一直是opencv_contrib库的一部分，在3.3版中，它被提到了主仓库中。新版OpenCV dnn模块目前支持Caffe、TensorFlow、Torch、PyTorch等深度学习框架。另外，新版本中使用预训练深度学习模型的API同时兼容C++和Python OpenCV 3

Correct Model Data Structure? (My 1st Rails App)

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问题 I'm about to build my first Ruby on Rails application (and first anything beyond xhtml and css), and I'm looking for some helpful feedback on my model structure. I've included a mockup to help visual the application. The only models I'm sure I need so far are: 1. a movie model (to serve as the main model, named movie so URL's will look like, "sitename.com/movies/1-Willy-Wonka") and 2. a user model Other than those, I don't know what to make the others; like 'filming locations', 'actors', and

Django: Filter objects by date range

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My object model is : class Event(models.Model): start = models.DateTimeField() end = models.DateTimeField() I need to filter all objects for today. I have one object with start date 2014/03/01 00:00 and end date 2014/10/01 00:00. I need to have this object when filtering objects by today date ex.: Event.objects.filter(start__gte=today, end__lte=today) How can I filter objects by today date and get all results where start > today < end ? Get the today's date from datetime.date.today() and use gt and lt : import datetime today = datetime.date.today() Event.objects.filter(start__lt=today, end__gt

Update large CakePHP model, but don't touch certain fields?

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问题 Using CakePHP 1.3 I have a fairly large model in CakePHP, and I'd like to have some hidden elements on the form page to (manually) compare/validate against before saving, but when doing a saveAll() (with validation), I don't want these fields present (essentially to avoid them being updated). What's the proper way to handle this? Remove them from $this->data before handing that to saveAll() ? 回答1: Use the 'fieldlist' option: $this->Model->saveAll($data, array('fieldlist' => array('fields',

DRF 一对多序列化与反序列化

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化序列化出库的过程，是从数据库中把数据读出并以json的形式供前端使用反序列化入库的过程，是从前端将数据传入到views.py的函数或者类中，经过后台逻辑处理，最终写到数据库中。安装 djangorestframework pip install djangorestframework 注册到 INSTALL_APPS 中 INSTALLED_APPS = [ ... 'rest_framework', ] 配置数据库 DATABASES = { 'default': { 'ENGINE': 'django.db.backends.mysql', 'NAME': 'tutorial', 'HOST': '127.0.0.1', 'PORT': 3306, 'USER': 'root', 'PASSWORD': 'ocnt-123', 'OPTIONS':{ "init_command":"SET foreign_key_checks = 0;",# 禁用外键约束 } } } 新增老师类和学生类 from django.db import models # 创建老师模型 class Teacher(models.Model): # 教师名称 name = models.CharField(max_length=32,unique=True) # 添加时间 addtime =

如果需要独立运行脚本，并且还想使用django的环境模块的话需要设置

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Django运行独立程序 # config allow this is py invoke django models # config url Base_dir = "/".join(os.path.dirname(os.path.abspath(__file__)).split('/')[:-1]) sys.path.append(Base_dir) os.environ.setdefault("DJANGO_SETTINGS_MODULE", "one_finger.settings") from openstack import models import django django.setup() 来源： https://www.cnblogs.com/john-xiong/p/11975658.html

In ASP.NET MVC3, how should one render multiple PartialViews backed by multiple Models?

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问题 In MVC3 Razor, how do you create a page with multiple forms, so that each form is a partial view rendered with its own model? We have been trying various forms of calling Html.RenderPartial(), passing in the partialview name as well as an instance of our models that we're accessing through the ViewBag, but every method we've tried seems to have serious issues, and so we must have a fundamental misunderstanding of how this is supposed to operate in an ideal world. We have found some SO

BackboneJS best way to rearrange models in a collection while maintaining 0-indexed ordinal property for each model

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问题 I have a problem I'm playing with here, I have a collection of BackboneJS models, each model has a 'ordinal' property that tracks its order in the collection. Here is my play-data var ex_group_test_data = [{ title: 'PRE EXERCISE', id: 0, ordinal: 1, group_items: [{ id: 0, ordinal: 0, title: 'item 1' },{ id: 1, ordinal: 1, title: 'item 2' }] },{ title: 'MAIN PART', id: 1, ordinal: 0, group_items: [{ id: 2, ordinal: 0, title: 'item 3', description: 'testing descrip' },{ id: 3, ordinal: 1, title