当我试图使用POST请求将一些数据插入mysql数据库时，我收到一条错误消息，通知我AttributeError'Query'对象没有属性'contains_column_references'，它给出了错误消息：
跟踪：
File "/Users/asp/Desktop/learning platform/env/lib/python3.7/site-packages/django/core/handlers/exception.py" in inner
35. response = get_response(request)
File "/Users/asp/Desktop/learning platform/env/lib/python3.7/site-packages/django/core/handlers/base.py" in _get_response
128. response = self.process_exception_by_middleware(e, request)
File "/Users/asp/Desktop/learning platform/env/lib/python3.7/site-packages/django/core/handlers/base.py" in _get_response
126. response = wrapped_callback(request, *callback_args, **callback_kwargs)
File "/Users/asp/Desktop/learning platform/env/lib/python3.7/site-packages/django/contrib/auth/decorators.py" in _wrapped_view
21. return view_func(request, *args, **kwargs)
File "/Users/asp/Desktop/learning platform/learningPlatform/contents/views.py" in create_content
31. content.save()
File "/Users/asp/Desktop/learning platform/env/lib/python3.7/site-packages/django/db/models/base.py" in save
729. force_update=force_update, update_fields=update_fields)
File "/Users/asp/Desktop/learning platform/env/lib/python3.7/site-packages/django/db/models/base.py" in save_base
759. updated = self._save_table(raw, cls, force_insert, force_update, using, update_fields)
File "/Users/asp/Desktop/learning platform/env/lib/python3.7/site-packages/django/db/models/base.py" in _save_table
842. result = self._do_insert(cls._base_manager, using, fields, update_pk, raw)
File "/Users/asp/Desktop/learning platform/env/lib/python3.7/site-packages/django/db/models/base.py" in _do_insert
880. using=using, raw=raw)
File "/Users/asp/Desktop/learning platform/env/lib/python3.7/site-packages/django/db/models/manager.py" in manager_method
82. return getattr(self.get_queryset(), name)(*args, **kwargs)
File "/Users/asp/Desktop/learning platform/env/lib/python3.7/site-packages/django/db/models/query.py" in _insert
1125. return query.get_compiler(using=using).execute_sql(return_id)
File "/Users/asp/Desktop/learning platform/env/lib/python3.7/site-packages/django/db/models/sql/compiler.py" in execute_sql
1280. for sql, params in self.as_sql():
File "/Users/asp/Desktop/learning platform/env/lib/python3.7/site-packages/django/db/models/sql/compiler.py" in as_sql
1233. for obj in self.query.objs
File "/Users/asp/Desktop/learning platform/env/lib/python3.7/site-packages/django/db/models/sql/compiler.py" in <listcomp>
1233. for obj in self.query.objs
File "/Users/asp/Desktop/learning platform/env/lib/python3.7/site-packages/django/db/models/sql/compiler.py" in <listcomp>
1232. [self.prepare_value(field, self.pre_save_val(field, obj)) for field in fields]
File "/Users/asp/Desktop/learning platform/env/lib/python3.7/site-packages/django/db/models/sql/compiler.py" in prepare_value
1162. if value.contains_column_references:
Exception Type: AttributeError at /contents/create
Exception Value: 'Query' object has no attribute 'contains_column_references'
traceback
from django.db import models
from lessons.models import Lessons
from django.utils.datastructures import MultiValueDictKeyError
class Contents(models.Model):
material_title = models.TextField()
content = models.TextField()
lesson_id = models.ForeignKey(Lessons,on_delete= models.CASCADE)
以下代码获取POST请求参数并将其插入数据库
def create_content(request):
print("=================== create_content=============================")
if request.method == 'POST':
if request.POST['lesson_id'] and request.POST['content'] and request.POST['material_title']:
if request.POST['lesson_id']!='' and request.POST['content']!='' and request.POST['material_title']!='':
ls = Lessons.objects
lessons = Lessons.objects.filter(id=request.POST['lesson_id'])
contents = Contents.objects.create(content=request.POST['content'],lesson_id_id=lessons,material_title=request.POST['material_title'])
# contents.save()
print("=======================")
topic = Courses.objects.filter(userId=request.user)
materialsbylesson = Lessons.objects
return render(request,'contents_create.html', {'error':'Lesson Has been created successfully','topics':topic,'lessons':materialsbylesson})
else:
print("not all Available else statement3")
topic = Courses.objects.filter(userId=request.user)
materialsbylesson = Lessons.objects
wikidata = Wikidata.objects
return render(request,'contents_create.html', {'error':'Lesson Has been created successfully','topics':topic,'lessons':materialsbylesson})
else:
print("not all Available else statement2")
print(request.POST['content'])
topic = Courses.objects.filter(userId=request.user)
materialsbylesson = Lessons.objects
wikidata = Wikidata.objects
return render(request,'contents_create.html', {'error1':'some inserted data is missing','topics':topic,'lessons':materialsbylesson})
else:
# user = User.objects.get(username = request.POST['username'])
try:
# MARK get topics by user
# MARK get lessons by topic
print("==================================not post request")
topic = Courses.objects.filter(userId=request.user)
lessonsByTopic = Lessons.objects
lessonsByUser = []
for topicls in topic:
lessons_hierarchy = Lessons.objects
level_lesson = 1
for lesson_hierarchy in lessons_hierarchy.all():
if lesson_hierarchy.topic_id_id == topicls.id:
lessonsByUser.append(lesson_hierarchy)
print("//////////////////////////////////////////////////////==")
print(topic)
print(lessonsByUser)
# print(lessonsByTopic)
print("//////////////////////////////////////////////////////==")
# wiki_topic_id = topic.id
# lesson = Lessons.objects
return render(request,'contents_create.html',{'topics':topic,'lessons':lessonsByTopic,'ls':lessonsByUser})
except Courses.DoesNotExist:
print("except post request")
print("does not exit")
return render(request,'contents_create.html')
答案 0 :(得分：0)
在创建新内容时，应该是这样的：
contents = Contents.objects.create(content=request.POST['content'], lesson_id_id =request.POST['lesson_id'],material_title=request.POST['material_title'])