models

django admin显示多对多字段ManyToManyField

不问归期 提交于 2019-12-15 23:56:40
参考文档https://jingyan.baidu.com/article/4e5b3e190f55c591901e24b3.html admin.py from .models import *class BookAdmin(admin.ModelAdmin): list_display = ["title","作者"] def 作者(self, obj): return [bt.name for bt in obj.authors.all()] filter_horizontal = ('authors',) admin.site.register(Book,BookAdmin) models.py class Book(models.Model): title = models.CharField(max_length=32) authors = models.ManyToManyField("Author") def __str__(self): return self.title class Author(models.Model): name = models.CharField(max_length=32) def __str__(self): return self.name 来源: https://www.cnblogs.com/zmdComeOn/p

CenterNet 在win10+cuda10.0+pytorch1.1.0下搭建运行环境

半世苍凉 提交于 2019-12-15 06:38:24
1下载源码 https://github.com/xingyizhou/CenterNet.git 2下载DcnV2源码 https://github.com/CharlesShang/DCNv2.git 原版的版本不对 需要替换 3安装VS2015或2017 否则编译不了 4编译DCNV2 将/src/lib/models/networks/DCNv2中的文件清空 使用下载的DCNv2替换 修改/DCNv2/src/cuda/dcn_v2_cuda.cu文件,如下 //extern THCState *state; THCState *state = at::globalContext().lazyInitCUDA(); 然后 cd src\lib\models\networks\DCNv2 python setup.py build develop 最后提示Finished…………则成功。 5编译NMS 位置在 cd src\lib\external 修改setup.py 删掉一行 extra_compile_args=["-Wno-cpp", "-Wno-unused-function"] 然后运行 python setup.py build_ext --inplace 6.下载模型并运行 模型下载地址 https://github.com/xingyizhou

建议收藏:不容错过的 Node.js 项目架构

只谈情不闲聊 提交于 2019-12-14 07:18:06
Express.js 是用于开发 Node.js REST API 的优秀框架,但是它并没有为您提供有关如何组织 Node.js 项目的任何线索。 虽然听起来很傻,但这确实是个问题。 正确的组织 Node.js 项目结构将避免重复代码、提高服务的稳定性和扩展性。 这篇文章是基于我多年来在处理一些糟糕的 Node.js 项目结构、不好的设计模式以及无数个小时的代码重构经验的探索研究。 如果您需要帮助调整 Node.js 项目架构,只需给我发一封信 sam@softwareontheroad.com。 目录 目录结构 三层架构 服务层 Pub/Sub 层 ️️️️ 依赖注入 单元测试 Cron Jobs 和重复任务 配置和密钥 Loaders 目录结构 这是我要谈论的 Node.js 项目结构。 我在构建的每个 Node.js REST API 服务中都使用了下面这个结构,让我们了解下每个组件的功能。 src │ app.js # App 入口 └───api # Express route controllers for all the endpoints of the app └───config # 环境变量和配置相关 └───jobs # 对于 agenda.js 的任务调度定义 └───loaders # 将启动过程拆分为模块 └───models # 数据库模型 └──

How to get a model to specify a pre-requisite condition?

…衆ロ難τιáo~ 提交于 2019-12-13 20:23:39
问题 In my model "Post.rb", I'm trying to have it only return posts if column deleted is 0. In other words, when the user deletes posts, it doesn't remove the item from the database, but rather turns deleted to 1. So if I run Post.find(:all), I want it to automatically add the condition "deleted = '0'". How do I go about doing this from my model? Thanks! 回答1: Yes, default_scope is going to be simplest method and will allow you to continue using things like Post.find(:all) without worrying about

Packaging Rails 2.3 Models

别等时光非礼了梦想. 提交于 2019-12-13 16:24:10
问题 I've got an existing webapp running on Rails. The plan is to setup a new server which will provide an API service, and eventually update the webapp to be a client of this API. It seems like a good approach to achieving this would be packaging all the models as gems and sharing them between the two applications. Eventually the API service would be monolithic - containing all the models, but there is a period of development/migration where models will need to be shared. Both the API and the

Change model name in rails easily

好久不见. 提交于 2019-12-13 15:59:05
问题 I'm going to need to change one of my model names. Is there anything out there that will replace every instance of the original model name in the controllers views and tests or do I have to do it all manually, page by page? 回答1: Check out RubyMine from JetBrains, they have some good refactoring tools for ruby. 回答2: You have to do all manually, page by page. If you have tests, they should give you clear indications of where it is still in use. 回答3: Netbeans has this feature, where you can give

Django many-to-may : how get row id in related table

我与影子孤独终老i 提交于 2019-12-13 15:46:16
问题 I have 2 simple models for example class First(m.Model): target_field = m.CharField() class Second(m.Model): link_field = m.ManyToManyField(First) Related linking table look like this: id | second_id | first_id How can i get ID? Not second_id or first_id - exactly row ID. I cant find Django methods for it, and wrote it my self. Thanks for help. UPD. For frontend API i need cross ID for related objects. q_second = Second.objects.select_related().all() for i in q_second.link_field.all() print i

Attache zend filters and validation chains to models/doctrine entities

断了今生、忘了曾经 提交于 2019-12-13 15:35:04
问题 This episode from Voice of the ElePHPant, starts talking about Zend_Form and how Zend\Form will be in Zend Framework 2 around 22:00. Filtering and validation is attached to models rather than being bound to the form, which allow having business rules (validation and filtering) at model level. I'm developing with Zend Framework 1.11 and my models are Doctrine 2.2 entities: how can i attach filters and validation chains to my entities? I'd like validation of entities with @LifecycleCallbacks or

Storing the edit history of a django model in another custom model

烈酒焚心 提交于 2019-12-13 12:09:28
问题 I have two models lets say: class superfields(Model): fieldA = models.FloatField() fieldB = models.FloatField() class Meta: abstract = True class my_model( superfields ): def has_history( self ): return self.my_model_history_set.count() > 0 class my_model_history( superfields ): reason = models.TextField() mymodel = models.ForeignKey( my_model ) 'my_model' is populated with data (under fieldA and fieldB). Whenever someone edits 'my_model's fields and saves, I don't want to save the change in

How to daisy chain php classes [closed]

≯℡__Kan透↙ 提交于 2019-12-13 08:29:03
问题 It's difficult to tell what is being asked here. This question is ambiguous, vague, incomplete, overly broad, or rhetorical and cannot be reasonably answered in its current form. For help clarifying this question so that it can be reopened, visit the help center. Closed 7 years ago . I want to do this. $ppl->tech->ceo->apple(); How would I make that work? 回答1: For example: class ppl { public $tech; public function __construct(){ $this->tech = new tech(); } } class tech { public $ceo; public