在Django表单集中预填充部分初始数据

本文介绍了在Django表单集中预填充部分初始数据的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！ 问题描述

我在django表单集中实现初始数据很困难。

I’m having difficulty implementing initial data in my django formset.

对于上下文，我正在构建一个考勤应用，其中存在一个学生列表，需要

For context, I’m building an attendance app where a list of students exist and need to be assessed for attendance every day.

我要做的是让管理员点击上面列出日期的链接。然后将它们带到数据网格，其中每一行代表系统中的学生人数以及4列（学生姓名，日期，当前/缺席下拉列表，注释字段）。目的是用学生模型中的学生列表预先填充学生姓名字段，并用用户单击的链接上的日期预填充日期字段，并将出勤和备注字段作为用户输入。

What I’m trying to do is have an administrator click on a link which has a date listed on it. They will then be taken to data grid where each row represents the number of students in the system along with 4 columns (student name, date, present/absent drop down, a notes field). The goal is to have the student name field be pre-populated with the the list of students in the Student model, the date field be pre-populated with the date on the link the user clicked and the attendance and notes fields be user inputs.

任何帮助将不胜感激

谢谢！

—

Student model class Student(models.Model): first_name = models.CharField(max_length=255) last_name = models.CharField(max_length=255) GENDER_CHOICES = ( ('male', 'male'), ('female', 'female'), ) gender = models.CharField(max_length=12, choices=GENDER_CHOICES, null=False, blank=False) date_of_birth = models.DateField(auto_now=False, auto_now_add=False) @property def full_name(self): return ''.join([self.first_name, '_', self.last_name]) def __unicode__(self): return self.full_name Attendance model class Attendance(models.Model): student = models.ForeignKey('students.Student') attendance_date = models.DateField(auto_now=False, auto_now_add=False) STATUS_CHOICES = ( ('present', ‘1’), ('absent', ‘0’), ) status = models.CharField(max_length=12, choices=STATUS_CHOICES, null=False, blank=False) notes = models.CharField(max_length=300, null=True, blank=True) class Meta: unique_together = ("student", "attendance_date") def __unicode__(self): return self.student Attendance form class AttendanceForm(forms.ModelForm): class Meta: model = Attendance fields = ["student","attendance_date", "status", "notes"] View def add_attendance(request): s = Student.objects.all().values() AttendanceFormSet = formset_factory(AttendanceForm, extra=0) formset = AttendanceFormSet(request.POST or None, initial=s) if formset.is_valid(): try: instance = form.save(commit=False) instance.save() return HttpResponseRedirect('/') except: return HttpResponseRedirect('/') context = { "formset": formset, } return render(request, "group_attendance.html", context) Template <table id="formset" class="form"> {{ formset.management_form }} {% for form in formset.forms %} {% if forloop.first %} <thead><tr> {% for field in form.visible_fields %} <th>{{ field.label|capfirst }}</th> {% endfor %} </tr></thead> {% endif %} <tr> {% for field in form.visible_fields %} <td> {# Include the hidden fields in the form #} {% if forloop.first %} {% for hidden in form.hidden_fields %} {{ hidden }} {% endfor %} {% endif %} {{ field.errors.as_ul }} {{ field }} </td> {% endfor %} </tr> {% endfor %} </table>

推荐答案

如果我理解您的意思，我不确定质疑预期的方式。我认为您正在寻找一种生成动态表单的方法，该表单已预先填充了数据库中的数据。

I'm not really sure, if I understood your question the intended way. I think you're looking for a way to generate dynamic forms, which were pre-filled with data from the db.

可以找到关于此的非常有用的文章此处 jacobian/writing/dynamic-form-generation/

A really helpful article about that, can be found here jacobian/writing/dynamic-form-generation/

您没有固定数量的学生（表格中的字段为->），因此您必须生成所需数量的字段。因此，您必须遍历学生并为每个人创建一个表单字段。

You don't have a fixed numbers of students (-> fields in form), so you have to generate as many fields as needed. So you have to iterate over the students and create a form field for every single one.

您可以在上面的文章中找到它。下面是一个代码段及其解释：

You can find this in the article above. Just down below is a code snippet and an explanation of it:

class UserCreationForm(forms.Form): username = forms.CharField(max_length=30) password1 = forms.CharField(widget=forms.PasswordInput) password2 = forms.CharField(widget=forms.PasswordInput) def __init__(self, *args, **kwargs): extra = kwargs.pop('extra') super(UserCreationForm, self).__init__(*args, **kwargs) for i, question in enumerate(extra): self.fields['custom_%s' % i] = forms.CharField(label=question)