编制库存系统，具有多态项目和可管理的项目类型 [英] Coding an inventory system, with polymorphic items and manageable item types

问题描述

我们目前拥有员工的库存系统。它包含
笔记本电脑，手机，还符合人体工程学的椅子，冰箱或软件
许可证...所以非常不同的东西，管理员可以创建/阅读/
更新/删除。

完全基于管理界面完成版本后，我放弃了
，因为它没有提供足够的灵活性。所以我卷起了一个完整的
自定义版本，但是有太多的代码我的口味...这是一个
的痛苦维持。

我面临的一些问题包括：

• 允许管理员添加自己的项目类型通过
  接口，例如：笔记本电脑，电视，...基本上就像是可以通过一个接口通过一组属性创建Django模型。项目类型也是分层的，例如。电视
  和笔记本电脑是ElectronicItem的子类，它又是Item的
  子类，...




• 多态：当列表所有的项目，他们应该知道他们是什么类型的
  ，这是为了搜索/过滤列表与
  javascript，并且还生成URL到项目详细视图。




• 通过Ajax更新一些属性，例如笔记本电脑有
  许可证。在笔记本电脑的详细信息页面上，我有一个javascript经理，
  关联/分离许可证到该笔记本电脑。

所以我想知道有人有什么建议使用！ I
特别想知道，如果一个django CMSes应用程序可以帮助我，
，因为这听起来像CMS可以提供​​的功能！我甚至想到一个NOSql数据库...但是这些听起来像复杂的解决方案。

实际上我第一次面对Django的这个多态性问题，我还没有找到一个很好的解决方案。所以我有希望，他们是我完全错过的东西，有人可以向我展示光。

解决方案

好的，在撰写本文的时候，Django并没有那么好。

像mongodb这样的无架构数据库是这个问题的一个很好的解决方案，而Django根本不支持那些开箱即用。

所以我放弃了Django，并在 node.js 与mongodb数据库。

We currently have an inventory system for our employees. It contains laptops, phones, but also ergonomic chairs, fridges or software licenses ... So very different stuff that admins can create/read/ update/delete.

After doing a version completely based on admin interface, I gave up cause it didn't provide enough flexibility. So I rolled-up a complete custom version, but there is far too much code to my taste ... it's a pain to maintain.

Some of the problems I have been facing include :

• allowing the admins to add their own item types through an interface, e.g. : laptop, TV, ... so basically like if they could create Django models themselves with a set of attributes through an interface. Also item types are hierarchical, e.g. TV and Laptop are subclasses of ElectronicItem, which in turn is a subclass of Item, ...

• polymorphism : when listing all the items, they should be aware of what type they are, this in order to search/filter the list with javascript and also generate urls to the item detailed view.

• updating some attributes through Ajax, e.g. laptops have licenses. On a laptop detail page, I have a javascript "manager", to associate/detach licenses to that laptop.

So I was wondering if anybody had a suggestion on what to use ! I especially wonder if one of the django CMSes apps could help me, because that does sound like functionalities a CMS could provide ! I was even thinking of a NOSql database ... but those sound like complicated solutions.

It is actually not the first time I am facing this problem of polymorphism with Django, and I still haven't found a good solution. So I kind of hope, their is something that I have completely missed, and that somebody can show me the light !!!

解决方案

Ok ... at the time of the writing, Django is just not good with that.

Schema-free databases such as mongodb are a good solution for this problem, and Django simply doesn't support those out of the box.

So I gave up Django, and rewrote the whole thing in node.js with a mongodb database.

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