在 Django 中为表单自动生成表单字段 [英] Auto-generate form fields for a Form in django

问题描述

我有一些模型，我想根据这些数据生成一个多选表格.因此，表单将包含每个类别的条目，而选项将是该类别中的技能.

I have some models and I want to generate a multi-selection form from this data. So the form would contain an entry for each category and the choices would be the skills in that category.

models.py

class SkillCategory(models.Model):
    name = models.CharField(max_length=50)

class Skill(models.Model):
    name = models.CharField(max_length=50)
    category = models.ForeignKey(SkillCategory)

有没有办法自动生成表单域?我知道我可以在表单中为每个 SkillCategory 手动添加一个SkillCategory"条目，但将其作为模型的原因是可以自由编辑技能和技能类别.

Is there a way to auto-generate the form fields? I know I can manually add a 'SkillCategory' entry in the form for each SkillCategory, but the reason to have it as a model is so skills and skillcategories can be edited freely.

我想做这样的事情:(我试过这个，但没有让它工作，不记得确切的错误......)

I want to do something like this: (I tried this, but didn't get it to work, don't remember the exact error...)

forms.py

class SkillSelectionForm(forms.Form):
    def __init__(*args, **kwargs):
        super(SkillSelectionForm, self).__init__(*args, **kwargs)
        for c in SkillCategory.objects.all():
            category_skills = [(pk, s.name) for s in c.skill_set.all()]
            setattr(self, c.name, forms.MultipleChoiceField(choices=category_skills, widget=forms.CheckboxSelectMultiple))

<小时>

解决方案

这将创建一个使用 SkillCategory.name 的表单字段条目，并将选项分配为 Skill 中的选项.field_name/display_name 用于避免非 ascii 类别名称的问题.

This creates a form field entry using the SkillCategory.name and assigns choices as those in Skill. field_name/display_name are used to avoid issues with non-ascii category names.

forms.py

def get_categorized_skills():
    skills = {}
    for s in Skill.objects.values('pk', 'name', 'category__name').order_by('category__name'):
        if s['category__name'] not in skills.keys():
            skills[s['category__name']] = []
        skills[s['category__name']].append((s['pk'], s['name']))
    return skills

class SkillSelectionForm(forms.Form): 
    def __init__(self, *args, **kwargs):
        super(SkillSelectionForm, self).__init__(*args, **kwargs)
        skills = get_categorized_skills()
        for idx, cat in enumerate(skills.keys()):
            field_name = u'category-{0}'.format(idx)
            display_name = cat
            self.fields[field_name] = forms.MultipleChoiceField(choices=skills[cat], widget=forms.CheckboxSelectMultiple, label=display_name)

推荐答案

看看在 Django 中创建动态表单，来自 b-list.org 和 uswaretech.com.我已经成功地使用这些示例从模型动态创建表单内容.

Take a look at creating dynamic forms in Django, from b-list.org and uswaretech.com. I've had success using these examples to dynamically create form content from models.

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