Django不在管理中保存ModelMultipleChoiceField

Question

我想过滤skill_ids字段，并为每个SkillType创建3个“抽象”字段，但现在它没有保存在管理网站的hard_skills字段。

模型

class Task(models.Model):
    name = models.CharField(max_length=255)
    category_id = models.ForeignKey('Category', on_delete=models.RESTRICT, null=True)
    level_id = models.ForeignKey('Level', on_delete=models.RESTRICT, null=True)
    permission_ids = models.ManyToManyField('Permission', blank=True)
    skill_ids = models.ManyToManyField('Skill', blank=True)

表格

class TaskForm(ModelForm):
    hard_skills = ModelMultipleChoiceField(Skill.objects.filter(skill_type=SkillType.HARD_SKILL),
                                           widget=FilteredSelectMultiple("Hard Skills", False), required=False)

    class Meta:
        model = Task
        exclude = ['skill_ids']

管理员

@admin.register(Task)
class TaskAdmin(admin.ModelAdmin):
    list_per_page = 25
    list_display = ['name', 'category_id', 'level_id', 'get_permissions']
    list_filter = ['category_id']
    filter_horizontal = ['permission_ids', 'skill_ids']
    form = TaskForm

    def save_model(self, request, obj, form, change):
        for hard_skill in form.cleaned_data.get('hard_skills'):
            obj.skill_ids.set(hard_skill)
        super().save_model(request, obj, form, change)

Answer 1

ManyToManyField方法set需要一个列表，因此应该这样做：

obj.skill_ids.set(form.cleaned_data.get('hard_skills'))