Django表单字段预填充：从用户资料自动获取数据

# reviews/models.py (简化示例)
from django.db import models
from profiles.models import UserProfile # 假设UserProfile在profiles应用中

class Reviews(models.Model):
    """ 定义评论模型 """
    name = models.CharField(max_length=200, verbose_name="姓名")
    review_title = models.CharField(max_length=120, verbose_name="评论标题")
    review_text = models.TextField(null=True, max_length=500, verbose_name="评论内容")
    # ... 其他评论相关字段
    user_profile = models.ForeignKey(UserProfile, on_delete=models.SET_NULL,
                                     null=True, blank=True, related_name='review_profile',
                                     verbose_name="用户资料")

    class Meta:
        verbose_name_plural = "Reviews"

    def __str__(self):
        return self.review_title

# profiles/models.py (简化示例)
from django.db import models
from django.contrib.auth.models import User

class UserProfile(models.Model):
    """ 扩展Django内置User模型的用户资料 """
    user = models.OneToOneField(User, on_delete=models.CASCADE)
    default_full_name = models.CharField(max_length=50, null=True, blank=True, verbose_name="默认全名")
    # ... 其他用户资料字段

    def __str__(self):
        return self.user.username

# reviews/forms.py
from django import forms
from .models import Reviews
# from .widgets import CustomClearableFileInput # 如果有自定义文件输入组件

class ReviewsForm(forms.ModelForm):
    """ 创建评论表单 """
    class Meta:
        model = Reviews
        fields = ("name", "review_title", "review_rating", "review_text", "image")

    # image = forms.ImageField(
    #     label='Image', required=False, widget=CustomClearableFileInput
    # )

# reviews/views.py
from django.shortcuts import render, redirect, reverse
from django.contrib.auth.decorators import login_required
from django.contrib import messages
from .forms import ReviewsForm
from profiles.models import UserProfile # 确保导入 UserProfile 模型

@login_required
def add_review(request):
    """ 添加评论页面视图，预填充用户姓名 """

    # 尝试获取当前登录用户的个人资料
    profile = None
    if request.user.is_authenticated:
        try:
            profile = UserProfile.objects.get(user=request.user)
        except UserProfile.DoesNotExist:
            messages.warning(request, '您的个人资料尚未设置，请先完善。')
            # 可以在这里根据业务需求，选择重定向或允许用户手动填写

    if request.method == 'POST':
        # POST请求时，表单处理提交的数据。
        # 此时不应使用initial参数，因为提交的数据会覆盖它。
        form = ReviewsForm(request.POST, request.FILES)
        if form.is_valid():
            review = form.save(commit=False) # 先不保存，为了关联用户资料
            if profile:
                review.user_profile = profile # 将评论与用户资料关联
            review.save()
            messages.success(request, '评论发布成功，等待审核。')
            return redirect(reverse('reviews'))
        else:
            messages.error(request, '添加评论失败。请检查表单是否有效。')
    else:
        # GET请求时，预填充表单。
        # 只有在首次渲染表单时，initial参数才会生效。
        initial_data = {}
        if profile and profile.default_full_name:
            initial_data['name'] = profile.default_full_name # 预填充'name'字段
        form = ReviewsForm(initial=initial_data)

    template = 'reviews/add_review.html'
    context = {
        'form': form,
    }
    return render(request, template, context)