在 Django-admin 内联部分中对 ModelChoiceField 应用过滤

Question

我被困在使用 NestedTabularInline 过滤 Django-admin 部分中的 ModelChoiceField 中。尝试使用自定义ModelForm 为ModelChoiceField 提供queryset 以使其正确。 我想在选定的 plan 活动（它是父级）上过滤 plan 方法。见下图：

尝试解决此问题的 2 个问题：

1. print(filter_id) 仅在第一个关系存储在数据库中时才生成输出，这是有道理的。当然，您也想过滤您的第一个 PlanMethod。
2. 我不知道如何正确创建查询集。 get(id=11) 有效，但我需要以某种方式插入self.instance。 filter_id 的输出如下所示：

这里需要一些建议。

模型.py：

class Activity(models.Model):
    activity = models.CharField(max_length=30, default=0)
    def __str__(self):
        return self.activity

class Method(models.Model):
    method = models.CharField(max_length=30)
    activity = models.ForeignKey(Activity, on_delete=models.CASCADE, null=True)
    def __str__(self):
        return self.method

class PlanActivity(models.Model):
    plan = models.ForeignKey(Plan, on_delete=models.CASCADE, null=True)
    activity = models.ForeignKey(Activity, on_delete=models.CASCADE, null=True)
    position  = models.PositiveIntegerField(default=0, blank=False, null=False)
    class Meta:
        ordering = ('position', )

class PlanMethod(models.Model):
    planactivity = models.ForeignKey(PlanActivity, on_delete=models.CASCADE, null=True)
    method = models.ForeignKey(Method, on_delete=models.CASCADE, null=True)
    position  = models.PositiveIntegerField(default=0, blank=False, null=False)
    class Meta:
        ordering = ('position', )

admin.py:

class PlanMethodAdminForm(ModelForm):
    def __init__(self, *args, **kwargs):
        super(PlanMethodAdminForm, self).__init__(*args, **kwargs)
        filter_id = self.instance.planactivity_id
        print(filter_id)
        self.fields['method'].queryset = Method.objects.filter(
            activity_id=PlanActivity.objects.get(id=11).activity_id
            )

class PlanMethodAdminInline(SortableHiddenMixin, NestedTabularInline):
    model = PlanMethod
    sortable_field_name = "position"
    extra = 0
    form = PlanMethodAdminForm
        
class PlanActivityAdminInline(SortableHiddenMixin, NestedTabularInline):
    model = PlanActivity
    sortable_field_name = "position"
    extra = 0
    inlines = [PlanMethodAdminInline]

Answer 1

我会试试这个:: link

from django.contrib import admin
from app.models import Method
from django import forms

class PlanMethodAdminForm(forms.ModelForm):
  def __init__(self, *args, **kwargs):
    super(PlanMethodAdminForm, self).__init__(*args, **kwargs)
    
   class Meta:
    model = Method
    fields = '__all__'

class PlanMethodAdminInline(admin.ModelAdmin):
sortable_field_name = "position"
extra = 0
form = PlanMethodAdminForm
list_filter = ['method']
search_fields = ['method']
admin.site.register(Method, PlanMethodAdminInline)

希望对你有帮助，谢谢