def edit_entry(request,entry_id):
"""编辑既有条目"""
entry = Entry.objects.get(id=entry_id)
topic = entry.topic
if topic.owner != request.user:
raise Http404
if request.method != 'POST':
#初次请求，使用当前条目填充表单
form = EntryForm(instance=entry)
else:
# POST提交的数据，对数据进行处理
form = EntryForm(instance=entry,data=request.POST) #处理POST请求时，我们传递实参instance=entry和data=request.POST（见.），让Django根据既有条目对象创建一个表单实例，并根据request.POST中的相关数据对其进行修
if form.is_valid():
form.save()
return HttpResponseRedirect(reverse('learning_logs:topic',args=[topic.id]))
context = {'entry':entry,'topic':topic,'form':form}
return render(request, 'edit_entry.html',context)
def new_entry(request,topic_id):
"""在特定的主题中添加新条目"""
topic = Topic.objects.get(id=topic_id)
if request.method != 'POST':
#未提交数据，创建一个空表单
form = EntryForm()
else:
#post提交的数据，对数据进行处理
form = EntryForm(data=request.POST)
if form.is_valid():
"""调用save()时，我们传递了实参commit=False（见.），让Django创建一个新的条目对象，并将其存储到new_entry中，但不将它保存到数据库中。我们将new_entry的属性topic设置为在这个函数开头从数据库中获取的主题"""
new_entry = form.save(commit=False)
new_entry.topic = topic
new_entry.save() #且不指定任何实参。这将把条目保存到数据库，并将其与正确的主题相关联。
return HttpResponseRedirect(reverse('learning_logs:topic',args=[topic_id]))
context = {'topic':topic,'form':form}
return render(request,'new_entry.html',context)
def new_entry(request, topic_id):
"""在特定的主题中添加新条目"""
topic = Topic.objects.get(id=topic_id)
if request.method != 'POST':
# 未提交数据，创建一个空表单
form = EntryForm()
else:
# POST提交的数据，对数据进行处理
form = EntryForm(data=request.POST)
if form.is_valid():
new_entry = form.save(commit=False)
new_entry.topic = topic
new_entry.save()
return HttpResponseRedirect(
reverse('learning_logs:topic', args=[topic_id]))
context = {'topic': topic, 'form': form}
return render(request, 'learning_logs/new_entry.html', context)
def edit_entry(request, entry_id):
"""编辑既有条目"""
entry = Entry.objects.get(id=entry_id)
topic = entry.topic
if topic.owner != request.user:
raise Http404
if request.method != 'POST':
# 初次请求 ，使用当前条目填充表单
form = EntryForm(instance=entry)
else:
form = EntryForm(instance=entry, data=request.POST)
if form.is_valid():
form.save()
return HttpResponseRedirect(
reverse('learning_logs:topic', args=[topic.id]))
context = {'entry': entry, 'topic': topic, 'form': form}
return render(request, 'learning_logs/edit_entry.html', context)
def edit_entry( request, entry_id):
'''Edit an existing entry'''
entry = Entry.objects.get(id= entry_id)
topic = entry.topic
if topic.owner != request.user:
return redirect('learning_logs:topics')
if request.method != "POST":
#no data was submitted, fill the form with current data.
form = EntryForm(instance=entry)
else:
#data was submitted, update the entry
form = EntryForm(instance=entry, data=request.POST)
if form.is_valid():
#the content of the form is valid
form.save()
return redirect('learning_logs:topic', topic_id=topic.id)
context = {'entry':entry, 'form':form, 'topic':topic}
return render( request, 'learning_logs/edit_entry.html', context)
def edit_entry(request, entry_id):
"""Edit an existing entry"""
entry = Entry.objects.get(id=entry_id)
topic = entry.topic
check_topic_owner(request, topic)
if request.method != 'POST':
#Initial request, prefill form with current entry
form = EntryForm(instance=entry)
else:
#Post data submitted, process data
form = EntryForm(instance=entry, data=request.POST)
if form.is_valid():
form.save()
return HttpResponseRedirect(
reverse('learning_logs:topic', args=[topic.id]))
return render(request, 'edit_entry.txt', {
'entry': entry,
'topic': topic,
'form': form
})
def new_entry(request, topic_id):
'''Add a new entry to the topic with id == topic_id'''
#get the topic
topic = Topic.objects.get(id= topic_id)
if topic.owner != request.user:
return redirect('learning_logs:topics')
if request.method != 'POST':
#no data was submitted create empty form
form = EntryForm()
else:
form = EntryForm(request.POST)
if form.is_valid():
#dont add the entry to the database yet
new_entry = form.save(commit=False)
new_entry.topic = topic
new_entry.save()
return redirect('learning_logs:topic', topic_id=topic_id)
#display a blank or invalid form
context = {'topic':topic, 'form':form}
return render( request, 'learning_logs/new_entry.html', context)
def new_entry(request, topic_id):
topic = Topic.objects.get(id=topic_id)
if topic.owner != request.user:
return HttpResponseRedirect(reverse('learning_logs:new_topic'))
if request.method != 'POST':
form = EntryForm
else:
form = EntryForm(data=request.POST)
if form.is_valid():
new_entry = form.save(commit=False)
new_entry.topic = topic
new_entry.save()
return HttpResponseRedirect(
reverse('learning_logs:topic', args=[topic_id]))
context = {'topic': topic, 'form': form}
return render(request, 'learning_logs/new_entry.html', context)
def new_entry(request, topic_id):
"""Add new entry for a particular topic"""
topic = Topic.objects.get(id=topic_id)
check_topic_owner(request, topic)
if request.method != 'POST':
#No data submitted, create a blank form
form = EntryForm
else:
#Post data submitted, process data
form = EntryForm(request.POST)
if form.is_valid():
new_entry = form.save(commit=False)
new_entry.topic = topic
new_entry.save()
return HttpResponseRedirect(
reverse('learning_logs:topic', args=[topic_id]))
return render(request, 'new_entry.txt', {'topic': topic, 'form': form})
