Posted in Python onSeptember 29, 2017
说明和 Model
环境:
➜ python Python 3.6.3 |Anaconda custom (x86_64)| (default, Oct 6 2017, 12:04:38) [GCC 4.2.1 Compatible Clang 4.0.1 (tags/RELEASE_401/final)] on darwin Type "help", "copyright", "credits" or "license" for more information. >>> import django >>> print(django.get_version()) 2.0.1 >>>
2018年05月23日更新:
可以通过get_changeform_initial_data 函数来传递initial参数.
# admin.py @admin.register(Score) class ScoreConfigAdmin(FilterUserAdmin): # fields = ('id','name') form = ScoreConfigAdminForm def get_changeform_initial_data(self, request): initial = super().get_changeform_initial_data(request) initial.update({'uid': request.user.id}) return initial # forms.py class ScoreConfigAdminForm(forms.ModelForm): def __init__(self, *args, **kwargs): super().__init__(*args, **kwargs) if not kwargs.get('initial'): return self.uid = kwargs.get('initial').get('uid') class Meta: model = Score fields = '__all__'
有一个支持多用户(使用 django admin)的 Blog,每一篇 Post 都需要记录是谁发表的并且属于那个 Blog。
user 与 Blog 的关系、 Blog 与 Post 有2种定义方式,一种是使用独立关系表,另外一种是直接在 Model 中定义中使用外键。
后面一种的 model 定义如下:
from django.contrib.auth.models import User from django.db import models class Blog(models.Model): ''' Blog ''' id = models.AutoField(unique=True, primary_key = True, verbose_name="序号") name = models.CharField(max_length=255, blank=True, null=True, verbose_name="名称") user = models.ForeignKey(User, on_delete=models.CASCADE) create_time = models.DateTimeField(verbose_name='添加时间', auto_now_add=True, blank=True) class Meta: verbose_name = 'Blog' verbose_name_plural = 'Blog管理' def __str__(self): return self.name class Post(models.Model): ''' Post 内容 ''' id = models.AutoField(unique=True, primary_key = True, verbose_name="序号") title = models.CharField(max_length=255, blank=True, null=True, verbose_name="标题") content = models.TextField(max_length=1024, blank=True, null=True, verbose_name="内容") blog = models.ForeignKey(Blog, on_delete=models.CASCADE, verbose_name="所属Blog") user = models.ForeignKey(User, on_delete=models.CASCADE) create_time = models.DateTimeField(verbose_name='添加时间', auto_now_add=True, blank=True) class Meta: verbose_name = '文章' verbose_name_plural = '文章管理' def __str__(self): return self.title
Admin 中实现
admin 中有2处,一处是 Blog 和 Post 列表中按 user 过滤,另外一处是新增 Post 时需要按当前 user 过滤。完整代码如下:
from django.contrib import admin from django import forms # Register your models here. from django_summernote.admin import SummernoteModelAdmin from .models import Team, Member, Activity, Score from .models import Blog, Post class FilterUserAdmin(admin.ModelAdmin): ''' 按所属用户过滤的 base, class ''' def save_model(self, request, obj, form, change): # TODO 需要考虑不同用户对同一数据进行修改。 obj.user = request.user obj.save() def get_queryset(self, request): # For Django < 1.6, override queryset instead of get_queryset qs = super(FilterUserAdmin, self).get_queryset(request) # 不能加这个,加了这个会导致 superuser 更新普通用户的数据。 # if request.user.is_superuser: # return qs return qs.filter(user=request.user) def has_change_permission(self, request, obj=None): has_class_permission = super(FilterUserAdmin, self).has_change_permission(request, obj) if not has_class_permission: return False if obj is not None and not request.user.is_superuser and request.user.id != obj.user.id: return False return True class BlogConfigAdmin(FilterUserAdmin): list_display = ('id','name', 'create_time') exclude = ['user'] list_per_page = 50 admin.site.register(Blog, BlogConfigAdmin) class PostConfigAdmin(FilterUserAdmin): list_display = ('id','title', 'create_time') exclude = ['user'] list_per_page = 50 def render_change_form(self, request, context, add=False, change=False, form_url='', obj=None): # 新增 Post 时,相关联的 Blog 需要过滤,关键就在下面这句。 context['adminform'].form.fields['blog'].queryset = Team.objects.filter(user=request.user) return super(MemberConfigAdmin, self).render_change_form(request, context, add, change, form_url, obj) admin.site.register(Post, PostConfigAdmin)
说2句
在render_change_form中下断点,直接调试下会发现更多有趣的内容。
以上这篇Django Admin 实现外键过滤的方法就是小编分享给大家的全部内容了,希望能给大家一个参考,也希望大家多多支持三水点靠木。
Django Admin 实现外键过滤的方法
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ishouyong声明:登载此文出于传递更多信息之目的,并不意味着赞同其观点或证实其描述。
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