How to set the current user on the model instance using newforms admin.

TODO make it work with inline edited models

# app/models.py

from django.db import models
from django.contrib.auth.models import User

class Post(models.Model):
    user = models.ForeignKey(User)
    content = models.TextField()

class Comment(models.Model):
    post = models.ForeignKey(Post)
    user = models.ForeignKey(User)
    content = models.TextField()

# app/admin.py

from app.models import Post, Comment
from django.contrib import admin

class CommentInline(admin.TabularInline):
    model = Comment
    fields = ('content',)

class PostModelAdmin(admin.ModelAdmin):

    fields= ('content',)
    inlines = [CommentInline]

    def save_model(self, request, form, change): 

        instance = form.save(commit=False)

        instance.user = request.user
        instance.save()

        form.save_m2m()
        
        return instance

    def save_formset(self, request, formset, change): 

        instances = formset.save(commit=False)

        for instance in instances:

            instance.user = request.user
            instance.save()

        formset.save_m2m()

admin.site.register(Post, PostModelAdmin)