Django: How to get current user in admin forms?

Here is what i did recently for a Blog:

class BlogPostAdmin(admin.ModelAdmin):
    form = BlogPostForm

    def get_form(self, request, **kwargs):
         form = super(BlogPostAdmin, self).get_form(request, **kwargs)
         form.current_user = request.user
         return form

I can now access the current user in my forms.ModelForm by accessing self.current_user

EDIT: This is an old answer, and looking at it recently I realized the get_form method should be amended to be:

    def get_form(self, request, *args, **kwargs):
         form = super(BlogPostAdmin, self).get_form(request, *args, **kwargs)
         form.current_user = request.user
         return form

(Note the addition of *args)

Joshmaker's answer doesn't work for me on Django 1.7. Here is what I had to do for Django 1.7:

class BlogPostAdmin(admin.ModelAdmin):
    form = BlogPostForm

    def get_form(self, request, obj=None, **kwargs):
        form = super(BlogPostAdmin, self).get_form(request, obj, **kwargs)
        form.current_user = request.user
        return form

For more details on this method, please see this relevant Django documentation

This use case is documented at ModelAdmin.get_form

[...] if you wanted to offer additional fields to superusers, you could swap in a different base form like so:

class MyModelAdmin(admin.ModelAdmin):
    def get_form(self, request, obj=None, **kwargs):
        if request.user.is_superuser:
            kwargs['form'] = MySuperuserForm
        return super().get_form(request, obj, **kwargs)

---

If you just need to save a field, then you could just override ModelAdmin.save_model

from django.contrib import admin

class ArticleAdmin(admin.ModelAdmin):
    def save_model(self, request, obj, form, change):
        obj.user = request.user
        super().save_model(request, obj, form, change)