更正django模板的if/else语句语法
我有一个约会应用程序,我需要在每个用户匹配的个人资料下面创建一个链接。然后,该链接应将其用户id传递到模板中,以便仅根据用户id在当前用户和该特定用户之间显示消息。我在这里遇到了Django模板中if/else语句的语法问题。我该怎么做呢 **base.html/href消息链接**更正django模板的if/else语句语法,django,django-views,django-templates,Django,Django Views,Django Templates,我有一个约会应用程序,我需要在每个用户匹配的个人资料下面创建一个链接。然后,该链接应将其用户id传递到模板中,以便仅根据用户id在当前用户和该特定用户之间显示消息。我在这里遇到了Django模板中if/else语句的语法问题。我该怎么做呢 **base.html/href消息链接** <li class="nav-item"> <a class="nav-link" href="{% url 'dating_app:messages' u
<li class="nav-item">
<a class="nav-link" href="{% url 'dating_app:messages' user.id %}">Check Messages</a>
</li>
messages.html
<div id="msg-list-div" class="panel-body">
<ul id="msg-list" class="list-group">
<br><br><br>
{% for obj in messages %}
{% if obj.sender == request.user and obj.receiver == profile%}
{% if obj.sender == request.user%}
<li class="text-right list-group-item">{{obj.message}}<br>{{ obj.date }}<li>
{% elif obj.receiver == profile %}
<li class="text-left list-group-item">{{obj.message}}<br>{{ obj.date }}<li>
{%endif%}
{%endif%}
{% empty %}
<li class="text-right list-group-item">No messages yet...Keep mingling!</li>
{% endfor %}
</ul>
</div>
型号.py
class Profile(AbstractBaseUser):
class Meta:
swappable = 'AUTH_USER_MODEL'
email = models.EmailField(verbose_name="email")
username = models.CharField(max_length=30, unique=True)
date_joined = models.DateTimeField(verbose_name='date joined', auto_now_add=True)
last_login = models.DateTimeField(verbose_name='last login', auto_now=True)
is_admin = models.BooleanField(default=False)
is_active = models.BooleanField(default=True)
is_staff = models.BooleanField(default=False)
is_superuser = models.BooleanField(default=False)
#what I added
description = models.TextField()
photo = models.ImageField(upload_to='profile_photo',blank=False, height_field=None, width_field=None, max_length=100)
matches = models.ManyToManyField(settings.AUTH_USER_MODEL, related_name='+', blank=True)
USERNAME_FIELD = 'username'
REQUIRED_FIELDS = ['description','photo','email']
objects = ProfileManager()
def __str__(self):
return self.username
def has_perm(self, perm, obj=None):
return self.is_admin
def has_module_perms(self,app_label):
return True
class UserVote(models.Model):
user = models.ForeignKey(settings.AUTH_USER_MODEL, on_delete=models.CASCADE)
voter = models.ForeignKey(settings.AUTH_USER_MODEL, related_name='given_vote', on_delete=models.CASCADE)
vote = models.BooleanField(default=False)
class Meta:
unique_together = (('user', 'voter'))
class InstantMessage(models.Model):
sender = models.ForeignKey(settings.AUTH_USER_MODEL, related_name= 'sender',on_delete=models.CASCADE )
receiver = models.ForeignKey(settings.AUTH_USER_MODEL, on_delete=models.CASCADE)
message = models.TextField()
date = models.DateTimeField(auto_now_add=True)
def __unicode__(self):
return self.message
from django.db import models
from django.contrib.auth.models import AbstractBaseUser,BaseUserManager, User
from dating_project import settings
from django.contrib.auth import get_user_model
class ProfileManager(BaseUserManager):
def create_user(self, username, email,description,photo, password=None):
if not email:
raise ValueError("You must creat an email")
if not username:
raise ValueError("You must create a username!")
if not description:
raise ValueError("You must write a description")
if not photo:
raise ValueError("You must upload a photo")
user = self.model(
email=self.normalize_email(email),
username = username,
description= description,
photo= photo,
)
user.set_password(password)
user.save(using=self._db)
return user
def create_superuser(self, username, email,description,photo, password):
user = self.create_user(
email=self.normalize_email(email),
password=password,
username=username,
description=description,
photo=photo,
)
user.is_admin=True
user.is_staff=True
user.is_superuser=True
user.save(using=self._db)
return user
class Profile(AbstractBaseUser):
class Meta:
swappable = 'AUTH_USER_MODEL'
email = models.EmailField(verbose_name="email")
username = models.CharField(max_length=30, unique=True)
date_joined = models.DateTimeField(verbose_name='date joined', auto_now_add=True)
last_login = models.DateTimeField(verbose_name='last login', auto_now=True)
is_admin = models.BooleanField(default=False)
is_active = models.BooleanField(default=True)
is_staff = models.BooleanField(default=False)
is_superuser = models.BooleanField(default=False)
#what I added
description = models.TextField()
photo = models.ImageField(upload_to='profile_photo',blank=False, height_field=None, width_field=None, max_length=100)
matches = models.ManyToManyField(settings.AUTH_USER_MODEL, related_name='+', blank=True)
USERNAME_FIELD = 'username'
REQUIRED_FIELDS = ['description','photo','email']
objects = ProfileManager()
def __str__(self):
return self.username
def has_perm(self, perm, obj=None):
return self.is_admin
def has_module_perms(self,app_label):
return True
class UserVote(models.Model):
user = models.ForeignKey(settings.AUTH_USER_MODEL, on_delete=models.CASCADE)
voter = models.ForeignKey(settings.AUTH_USER_MODEL, related_name='given_vote', on_delete=models.CASCADE)
vote = models.BooleanField(default=False)
class Meta:
unique_together = (('user', 'voter'))
class InstantMessage(models.Model):
sender = models.ForeignKey(settings.AUTH_USER_MODEL, related_name= 'senderr',on_delete=models.CASCADE )
receiver = models.ForeignKey(settings.AUTH_USER_MODEL, on_delete=models.CASCADE)
message = models.TextField()
date = models.DateTimeField(auto_now_add=True)
def __unicode__(self):
return self.message
整个型号.py
class Profile(AbstractBaseUser):
class Meta:
swappable = 'AUTH_USER_MODEL'
email = models.EmailField(verbose_name="email")
username = models.CharField(max_length=30, unique=True)
date_joined = models.DateTimeField(verbose_name='date joined', auto_now_add=True)
last_login = models.DateTimeField(verbose_name='last login', auto_now=True)
is_admin = models.BooleanField(default=False)
is_active = models.BooleanField(default=True)
is_staff = models.BooleanField(default=False)
is_superuser = models.BooleanField(default=False)
#what I added
description = models.TextField()
photo = models.ImageField(upload_to='profile_photo',blank=False, height_field=None, width_field=None, max_length=100)
matches = models.ManyToManyField(settings.AUTH_USER_MODEL, related_name='+', blank=True)
USERNAME_FIELD = 'username'
REQUIRED_FIELDS = ['description','photo','email']
objects = ProfileManager()
def __str__(self):
return self.username
def has_perm(self, perm, obj=None):
return self.is_admin
def has_module_perms(self,app_label):
return True
class UserVote(models.Model):
user = models.ForeignKey(settings.AUTH_USER_MODEL, on_delete=models.CASCADE)
voter = models.ForeignKey(settings.AUTH_USER_MODEL, related_name='given_vote', on_delete=models.CASCADE)
vote = models.BooleanField(default=False)
class Meta:
unique_together = (('user', 'voter'))
class InstantMessage(models.Model):
sender = models.ForeignKey(settings.AUTH_USER_MODEL, related_name= 'sender',on_delete=models.CASCADE )
receiver = models.ForeignKey(settings.AUTH_USER_MODEL, on_delete=models.CASCADE)
message = models.TextField()
date = models.DateTimeField(auto_now_add=True)
def __unicode__(self):
return self.message
from django.db import models
from django.contrib.auth.models import AbstractBaseUser,BaseUserManager, User
from dating_project import settings
from django.contrib.auth import get_user_model
class ProfileManager(BaseUserManager):
def create_user(self, username, email,description,photo, password=None):
if not email:
raise ValueError("You must creat an email")
if not username:
raise ValueError("You must create a username!")
if not description:
raise ValueError("You must write a description")
if not photo:
raise ValueError("You must upload a photo")
user = self.model(
email=self.normalize_email(email),
username = username,
description= description,
photo= photo,
)
user.set_password(password)
user.save(using=self._db)
return user
def create_superuser(self, username, email,description,photo, password):
user = self.create_user(
email=self.normalize_email(email),
password=password,
username=username,
description=description,
photo=photo,
)
user.is_admin=True
user.is_staff=True
user.is_superuser=True
user.save(using=self._db)
return user
class Profile(AbstractBaseUser):
class Meta:
swappable = 'AUTH_USER_MODEL'
email = models.EmailField(verbose_name="email")
username = models.CharField(max_length=30, unique=True)
date_joined = models.DateTimeField(verbose_name='date joined', auto_now_add=True)
last_login = models.DateTimeField(verbose_name='last login', auto_now=True)
is_admin = models.BooleanField(default=False)
is_active = models.BooleanField(default=True)
is_staff = models.BooleanField(default=False)
is_superuser = models.BooleanField(default=False)
#what I added
description = models.TextField()
photo = models.ImageField(upload_to='profile_photo',blank=False, height_field=None, width_field=None, max_length=100)
matches = models.ManyToManyField(settings.AUTH_USER_MODEL, related_name='+', blank=True)
USERNAME_FIELD = 'username'
REQUIRED_FIELDS = ['description','photo','email']
objects = ProfileManager()
def __str__(self):
return self.username
def has_perm(self, perm, obj=None):
return self.is_admin
def has_module_perms(self,app_label):
return True
class UserVote(models.Model):
user = models.ForeignKey(settings.AUTH_USER_MODEL, on_delete=models.CASCADE)
voter = models.ForeignKey(settings.AUTH_USER_MODEL, related_name='given_vote', on_delete=models.CASCADE)
vote = models.BooleanField(default=False)
class Meta:
unique_together = (('user', 'voter'))
class InstantMessage(models.Model):
sender = models.ForeignKey(settings.AUTH_USER_MODEL, related_name= 'senderr',on_delete=models.CASCADE )
receiver = models.ForeignKey(settings.AUTH_USER_MODEL, on_delete=models.CASCADE)
message = models.TextField()
date = models.DateTimeField(auto_now_add=True)
def __unicode__(self):
return self.message
如前所述,最好在视图中完成所有繁重的工作,而不是在模板中:
def messages(request, profile_id):
messages = InstantMessage.objects.filter(sender=request.user, receiver_id=profile_id, )
profile = get_object_or_404(Profile,id=profile_id)
...
{% for msg in messages %}
<li class="{% if msg.sender_id == request.user.id %}text-right{% else %}text-left{% endif %} list-group-item">
{{ msg.message }}<br/>{{ msg.date }}
</li>
{% empty %}
...
{% endfor %}
想象一下,如果InstantMessage
包含数十亿条记录,InstantMessage.objects.all()
的工作速度有多快?为什么呢
既然你想呈现“聊天”,我想你需要这样的东西:
from django.db.models import Q
...
messages = InstantMessage.objects.filter(Q(sender_id=request.user.id, receiver_id=profile_id,)
| Q(sender_id=profile_id, receiver_id=request.user.id,) ).\
values('sender_id', 'message', 'date', ).\
order_by('date',)
另请参见中进行复杂查询的示例
以及模板:
def messages(request, profile_id):
messages = InstantMessage.objects.filter(sender=request.user, receiver_id=profile_id, )
profile = get_object_or_404(Profile,id=profile_id)
...
{% for msg in messages %}
<li class="{% if msg.sender_id == request.user.id %}text-right{% else %}text-left{% endif %} list-group-item">
{{ msg.message }}<br/>{{ msg.date }}
</li>
{% empty %}
...
{% endfor %}
{%用于消息中的消息%}
{{msg.message}}
{{{msg.date}
{%empty%}
...
{%endfor%}
如前所述,最好在视图中完成所有繁重的工作,而不是在模板中:
def messages(request, profile_id):
messages = InstantMessage.objects.filter(sender=request.user, receiver_id=profile_id, )
profile = get_object_or_404(Profile,id=profile_id)
...
{% for msg in messages %}
<li class="{% if msg.sender_id == request.user.id %}text-right{% else %}text-left{% endif %} list-group-item">
{{ msg.message }}<br/>{{ msg.date }}
</li>
{% empty %}
...
{% endfor %}
想象一下,如果InstantMessage
包含数十亿条记录,InstantMessage.objects.all()
的工作速度有多快?为什么呢
既然你想呈现“聊天”,我想你需要这样的东西:
from django.db.models import Q
...
messages = InstantMessage.objects.filter(Q(sender_id=request.user.id, receiver_id=profile_id,)
| Q(sender_id=profile_id, receiver_id=request.user.id,) ).\
values('sender_id', 'message', 'date', ).\
order_by('date',)
另请参见中进行复杂查询的示例
以及模板:
def messages(request, profile_id):
messages = InstantMessage.objects.filter(sender=request.user, receiver_id=profile_id, )
profile = get_object_or_404(Profile,id=profile_id)
...
{% for msg in messages %}
<li class="{% if msg.sender_id == request.user.id %}text-right{% else %}text-left{% endif %} list-group-item">
{{ msg.message }}<br/>{{ msg.date }}
</li>
{% empty %}
...
{% endfor %}
{%用于消息中的消息%}
{{msg.message}}
{{{msg.date}
{%empty%}
...
{%endfor%}
我肯定会尝试只发送与对话匹配的消息,从视图中的模型中筛选出来。不要让模板循环遍历应用程序的每个用户发送的每条消息。此外,第一条内部if语句将始终为true,因为在外部ifobj.sender==request.user
。我肯定会尝试只发送与对话匹配的消息,并从视图中的模型中筛选。不要让模板循环遍历应用程序的每个用户发送的每条消息。此外,第一个内部if语句将始终为true,因为在外部ifobj.sender==request.user
。在调用任何“| |”符号的地方都会检查相同的条件。如果消息(request,profile|id):messages=InstantMessage.objects.filter(Q(发送方id=request.user.id,接收方id=profile\u id,)| Q(发送方id=profile\u id,接收方id=request.user.id,)。\value('sender\u id','message','date',)。\order\u by('date',)返回呈现(请求,'dating\u app/messages.html',{'messages':messages,})抱歉,它只有一个|
。修复了这个问题,但现在我得到了一个“异常值:名称'Q'未定义”将必需的导入添加到应答器我得到了一个语法错误,无论在哪里调用了“| |”符号如果消息(请求,配置文件id):messages=InstantMessage.objects.filter(Q(发送方id=request.user.id,接收方id=profile_id,)| Q(发送方id=profile_id,接收方id=request.user.id,)。\values('sender_id','message','date',)。\order_by('date',)返回呈现(请求,'dating_app/messages.html',{'messages':messages,})很抱歉,这里只有一个|
。修复了这个问题,但是现在我得到了一个“异常值:名称'Q'未定义”添加了必需的导入到答案