django admin 中用户定义的文本字段

发布于 2024-10-01 09:53:04 字数 386 浏览 4 评论 0原文

Django(和数据库)新手在这里。

我正在尝试找出一种方法来使用管理界面为表(我们称之为“书”)创建 n 个自定义文本字段。我想要一种让用户通过管理界面定义新文本字段的方法(而不是通过模型定义 CustomField1、CustomField2 等字段,然后运行 ​​manage.pysyncdb)。

最终,我想创建一个名为 CustomFields 的单独表。 django 管理员用户(不是程序员)将进入此表中的自定义文本字段(例如 pubdate、isbn、国家/地区)。然后,在为书籍进行数据输入时,他们会为所需的每个自定义字段点击“+”,将它们显示在下拉列表中,并为自定义字段添加随附文本。为每个字段输入的文本特定于父图书。

有什么建议吗?我有一种感觉,有一个简单的解决方案,但我在这里没有掌握。

Django (and database) newbie here.

I'm trying to figure out a way to enable the creation of n custom text fields for a table (let's call it Book) using the admin interface. I would like a way for the user to define new text fields through the admin interface (instead of defining fields like CustomField1, CustomField2, etc, through a model followed by running manage.py syncdb).

Ultimately, I would want to create a separate table called CustomFields. The django admin user (who is not a programmer), would go and enter the custom text fields in this table (e.g. pubdate, isbn, country). Then, when doing data entry for a Book, they would hit "+" for every custom field they wanted, have them available in a dropdown, and add accompanying text for the custom field. The text entered for each field is specific to the parent Book.

Any suggestions? I have a feeling there's a simple solution that I'm somehow not grasping here.

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夜吻♂芭芘 2024-10-08 09:53:04

您可能会遇到问题的地方是因为 Django 不会根据更改的模型声明重新创建表或列。这意味着如果不在数据库上手动运行生成的 sql,则无法在运行时将字段添加到表中。相反,您需要的是一种定义自定义字段并将它们链接到您的模型的方法。

我的建议如下:

class CustomField(models.Model):
    name = models.CharField(max_length=32)

class Book(models.Model):
    ... fields

class CustomValue(models.Model):
    field = models.ForeignKey(CustomField)
    value = models.CharField(max_length=255)
    book = models.ForeignKey(Book)

上面的验证是相当不存在的,这不允许您为每个模型定义所需的自定义字段,但如果您需要,您应该能够提出该部分稍后再说。

# taken and modified from django online tutorial
class CustomValueInline(admin.StackedInline):
    model = CustomValue
    extra = 3

class BookAdmin(admin.ModelAdmin):
    fieldsets = [
       # your fields in here
    ]
    inlines = [CustomValueInline]

admin.site.register(Book, BookAdmin)

这将允许用户直接选择最多 3 个自定义字段和值,并且可以根据需要选择添加更多字段和值。

编辑:更改了答案以反映评论中的更多信息。

Where you might run into problems is because Django will not recreate tables or columns based on changing model declarations. This means you're unable to add fields to a table at run-time without running the generated sql on your database manually. What you'll need, instead, is a way of defining custom fields, and linking them to your model.

What I'd suggest is the following:

class CustomField(models.Model):
    name = models.CharField(max_length=32)

class Book(models.Model):
    ... fields

class CustomValue(models.Model):
    field = models.ForeignKey(CustomField)
    value = models.CharField(max_length=255)
    book = models.ForeignKey(Book)

The validation on the above is fairly non-existant, and this doesn't allow you to define required custom fields for each model, but you should be able to come up with that part if you need it later on.

# taken and modified from django online tutorial
class CustomValueInline(admin.StackedInline):
    model = CustomValue
    extra = 3

class BookAdmin(admin.ModelAdmin):
    fieldsets = [
       # your fields in here
    ]
    inlines = [CustomValueInline]

admin.site.register(Book, BookAdmin)

This will allow users to select up to 3 custom fields and values directly, with the option to add more if they wish.

Edit: Changed the answer to reflect further information in comments.

月棠 2024-10-08 09:53:04

一开始,您可以为书籍创建一个模型,为文本字段创建一个模型,两者都通过 外键关系。然后您可以通过 django 的内联管理员轻松管理它,这将使您能够添加更多文本字段!

# models.py
from django.db import models

class Book(models.Model):
    title = models.CharField(max_length=100)

class TextField(models.Model):
    text = models.TextField
    book = models.ForeignKey(Book)

# admin.py
from django.contrib import admin
from models import TextField, Book

class TextAdmin(admin.TabularInline):

    model = TextField

class BookAdmin(admin.ModelAdmin):
    inlines = [TextAdmin]

admin.site.register(Book, BookAdmin)

For the beginning you can create one model for the book and one for the text field, both connected through a foreign key relation. You can easily administrate this then through django's inline admins, which will enable you to add more text fields!

# models.py
from django.db import models

class Book(models.Model):
    title = models.CharField(max_length=100)

class TextField(models.Model):
    text = models.TextField
    book = models.ForeignKey(Book)

# admin.py
from django.contrib import admin
from models import TextField, Book

class TextAdmin(admin.TabularInline):

    model = TextField

class BookAdmin(admin.ModelAdmin):
    inlines = [TextAdmin]

admin.site.register(Book, BookAdmin)
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