问题：

1.您创建了ProjectForm，它与Project模型相关，但image字段位于ProjectImage模型中。因此，image字段甚至没有传递给模板，并且您也没有在ProjectFrom中的fields=['title','describtion']中传递它。
1.您还没有在项目的urls.py中进行保存媒体文件的配置。

解决方案：

1.您应该在forms.py中创建两个表单，第一个ProjectForm将获取Project模型的数据，第二个ProjectImageForm将获取图像列表，然后使用request.FILES.getlist('image')可以在循环中逐个保存与特定示例相关的图像。
1.您应该在项目的urls.py中进行媒体配置

试试下面的代码：

forms.py

from django import forms
from django.forms import ClearableFileInput
from .models import Project, ProjectImage

class ProjectForm(forms.ModelForm):

    class Meta:
        model = Project
        fields = ['title', 'describtion']

class ProjectImageForm(forms.ModelForm):
    class Meta:
        model = ProjectImage
        fields = ['image']
        widgets = {
            'image': ClearableFileInput(attrs={'multiple': True}),
        }

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views.py

from django.http import HttpResponse
from django.shortcuts import redirect, render
from .forms import ProjectImageForm, ProjectForm
from .models import Project, ProjectImage

def createProject(request):
    form = ProjectForm()
    form2 = ProjectImageForm()

    if request.method == 'POST':
        form = ProjectForm(request.POST)
        form2 = ProjectImageForm(request.POST, request.FILES)
        images = request.FILES.getlist('image')
        if form.is_valid() and form2.is_valid():
            title = form.cleaned_data['title']
            describ = form.cleaned_data['describtion']
            print(title, describ)
            project_instance = Project.objects.create(
                title=title, describtion=describ)
            print('-------------------------------------------')
            print(project_instance)
            print('-------------------------------------------')

            for i in images:
                ProjectImage.objects.create(project=project_instance, image=i)
            return redirect('thanks')

    context = {'form': form, 'form2': form2}
    return render(request, 'projects/project_form.html', context)

def thanks(request):
    return HttpResponse('<h1>Form saved.</h1>')

型
project_form.html或模板文件：

<form class="form" method="POST" enctype="multipart/form-data">
    {% csrf_token %}
    {{form.title.label_tag}}
    {{form.title}}
        <br><br>
    {{form.describtion.label_tag}}
    {{form.describtion}}
        <br><br>
    {{form2.image.label_tag}}
    {{form2.image}}
        <br><br>

    <input type="submit" name="" id="">
</form>

型
项目的urls.py

from django.conf.urls.static import static
from django.conf import settings
from django.contrib import admin
from django.urls import path, include

urlpatterns = [
    path('admin/', admin.site.urls),
    path('', include('projects.urls'))
]

if settings.DEBUG:
    urlpatterns += static(settings.MEDIA_URL,
                          document_root=settings.MEDIA_ROOT)

型
应用程序的urls.py

urlpatterns = [
    path('admin/', admin.site.urls),
    path('', include('home.urls'))
]

型
您的models.py和settings.py可以保持相同，但建议使用MEDIA_URL = 'media/'和MEDIA_ROOT = os.path.join(BASE_DIR, 'media/')，然后您应该在其中嵌套文件夹以保存图像或任何文件。
Note:在处理POST数据后，你应该总是返回HttpResponseRedirect，这个技巧并不特定于Django，它是一个很好的实践，就像tutorial4中所述的那样。
Note:基于函数的视图通常用snake_case编写，而不是camelCase，您可以将其从createProject更改为create_project。
Note:在ProjectImage模型的FileField中，将/作为upload_to='products/'添加到upload_to末尾。

ClearableFileInput不支持“multiple”，可以使用allow_multiple_selected。但仍然只允许上传一个项目。
这条路适合我
forms.py

class MultipleFileInput(forms.ClearableFileInput):
    allow_multiple_selected = True

class ProductImageForm(forms.ModelForm):
    class Meta:
        model = ProductImage
        fields = ('image',)
        widgets = {
            'image': MultipleFileInput()
       }

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