Question

我的应用程序中有以下模型表单，其中包含从静态选择数组中填充的多选字段（很多复选框）。我希望用户能够选择多个项目，结果将作为以逗号分隔的字符串存储在数据库中，但Django验证会一直显示（例如）：

>>> bsf = BiomSearchForm({"otu_text": ["Test"], "criteria":"soil"})
>>> bsf.errors
{'otu_file': ['This field is required.']}
>>> bsf = BiomSearchForm({"otu_text": ["Test"], "criteria":["soil", "geothermal"]})
>>> bsf.errors
{'otu_file': ['This field is required.'], 'criteria': ["Select a valid choice. ['soil', 'geothermal'] is not one of the available choices."]}

这些选项存储在数据库中以供记录，它们不与任何其他表绑定。有没有办法迭代提交的多选数组并检查组成字符串是否可用？我发现如果我们传递一个字符串而不是一个数组，它将正确验证。

以下是我的模型及其形式：

class BiomSearchJob(models.Model):
    ECOSYSTEM_CHOICES = (
        ("all", "All Ecosystem"),
        ("animal", "Animal/Human"),
        ("anthropogenic", "Anthropogenic"),
        ("freshwater", "Freshwater"),
        ("marine", "Marine"),
        ("soil", "Soil"),
        ("plant", "Plant"),
        ("geothermal", "Geothermal"),
        ("biofilm", "Biofilm"),
    )

    user = models.ForeignKey(User, on_delete=models.CASCADE)
    completed = models.BooleanField(default=False)
    criteria = models.CharField(
        default="all", choices=ECOSYSTEM_CHOICES, max_length=200,
    )
    otu_text = models.TextField(default=None)
    created_at = models.DateTimeField(auto_now_add=True)
    updated_at = models.DateTimeField(auto_now=True)

    def set_completed(self, completed):
        self.completed = completed

class BiomSearchForm(forms.ModelForm):
    class Meta:
        model = BiomSearchJob
        fields = {
            "otu_text": forms.CharField,
            "otu_file": forms.FileField,
            "criteria": forms.MultipleChoiceField(
                required=True,
            ),
        }
        labels = {
            "otu_text": "Paste your BIOM table",
            "criteria": "Select the ecosystem",
        }
        widgets = {
            "otu_text": forms.Textarea(attrs={'cols': 30, 'rows': 12}),
            "criteria": forms.CheckboxSelectMultiple,
        }

    otu_file = forms.FileField(
        label="or upload your BIOM file",
    )

Answer 1

这是BiomSearchJob和EcosystemChoices之间ManyToMany关系的一个用例。这将为您实现一个中间表。

编辑：在下面添加一个示例实现：

class BiomSearchJob(models.Model):
    user = models.ForeignKey(User, on_delete=models.CASCADE)
    completed = models.BooleanField(default=False)
    criteria = models.ManyToManyField('EcosystemChoices', related_name='%(app_label)s_%(class)s_prs', blank=True)
    otu_text = models.TextField(default=None)
    created_at = models.DateTimeField(auto_now_add=True)
    updated_at = models.DateTimeField(auto_now=True)

    def set_completed(self, completed):
        self.completed = completed


class EcosystemChoices(models.Model):
    ecosystem = models.CharField(verbose_name=u'Ecosystem Type', max_length=60, help_text='Select all that apply')

使用您定义的选项预填充EcosystemChoices表。这可能有所帮助：Django ManyToMany Field

如何在预设的选择列表中验证Django ModelForm中的选择数组

1 个答案: