Django ModelForm：搜索过滤器多对多字段小部件

Question

我正在使用这个模型：

class Sample(models.Model):
    id_sample = models.AutoField(primary_key=True)
    name = models.CharField(unique=True, max_length=20)
    sample_id_sex = models.ForeignKey(Sex, on_delete=models.CASCADE, db_column='id_sex', verbose_name='Sexe')
    pools = models.ManyToManyField(Pool, through='SamplePoolIndexCand', through_fields=('sample_id', 'pool_id'), blank=True, verbose_name="Pools")

pools 是此模型中的 m2m 字段：

class Pool(models.Model):
    id_pool = models.AutoField(primary_key=True)
    name = models.CharField(unique=True, max_length=50, verbose_name="Pool")
    samples = models.ManyToManyField('Sample', through='SamplePoolIndexCand', blank=True, verbose_name="Mostres")

我创建了这个ModelForm：

class FormulariMostra(ModelForm):
    class Meta:
        model = Sample
        fields = ("name", "sample_id_sex", "pools",)

它工作正常，但问题是pools 字段可以包含数千个值。在这里提出了类似的问题：Django: Search many to many field while creating object

我尝试了https://github.com/ExoticObjects/django-better-filter-widget 推荐的这个小部件，但它似乎已经过时了......

还有其他选择吗？我知道这可以在管理员中完成，但我想在 ModelForm 中完成。

Answer 1

有autocomplete_fields：https://docs.djangoproject.com/en/3.2/ref/contrib/admin/#django.contrib.admin.ModelAdmin.autocomplete_fields

所以你可以写：

class FormulariMostra(ModelForm):
    class Meta:
        model = Sample
        autocomplete_fields = ["pools"]
        fields = ("name", "sample_id_sex", "pools",)

或者还有raw_id_fields https://docs.djangoproject.com/en/3.2/ref/contrib/admin/#django.contrib.admin.ModelAdmin.raw_id_fields