Question

我是django和python的初学者，目前我被Django教程的Creating our home page所困。我收到“ TemplateDoesNotExist错误”错误。我也在使用Windows。我在做什么错了？

Settings.py：

import os
BASE_DIR = os.path.dirname(os.path.dirname(os.path.abspath(__file__)))
import os
SECRET_KEY = os.environ.get('DJANGO_SECRET_KEY', 'cg#p$g+j9tax!#a3cup@1$8obt2_+&k3q+pmu)5%asj6yjpkag')
DEBUG = os.environ.get('DJANGO_DEBUG', '') != 'False'
ALLOWED_HOSTS = []
INSTALLED_APPS = [
    'django.contrib.admin',
    'django.contrib.auth',
    'django.contrib.contenttypes',
    'django.contrib.sessions',
    'django.contrib.messages',
    'django.contrib.staticfiles',
    'catalog.apps.CatalogConfig', 
]
MIDDLEWARE = [
    'django.middleware.security.SecurityMiddleware',
    'django.contrib.sessions.middleware.SessionMiddleware',
    'django.middleware.common.CommonMiddleware',
    'django.middleware.csrf.CsrfViewMiddleware',
    'django.contrib.auth.middleware.AuthenticationMiddleware',
    'django.contrib.messages.middleware.MessageMiddleware',
    'django.middleware.clickjacking.XFrameOptionsMiddleware',
]
ROOT_URLCONF = 'locallibrary.urls'
TEMPLATES = [
    {
        'BACKEND': 'django.template.backends.django.DjangoTemplates',
        'DIRS': [
            os.path.join(BASE_DIR, 'templates'),
            ],
        'APP_DIRS': True,
        'OPTIONS': {
            'context_processors': [
                'django.template.context_processors.debug',
                'django.template.context_processors.request',
                'django.contrib.auth.context_processors.auth',
                'django.contrib.messages.context_processors.messages',
            ],
        },
    },
]
WSGI_APPLICATION = 'locallibrary.wsgi.application'
DATABASES = {
    'default': {
        'ENGINE': 'django.db.backends.sqlite3',
        'NAME': os.path.join(BASE_DIR, 'db.sqlite3'),
    }
}
AUTH_PASSWORD_VALIDATORS = [
    {
        'NAME': 'django.contrib.auth.password_validation.UserAttributeSimilarityValidator',
    },
    {
        'NAME': 'django.contrib.auth.password_validation.MinimumLengthValidator',
    },
    {
        'NAME': 'django.contrib.auth.password_validation.CommonPasswordValidator',
    },
    {
        'NAME': 'django.contrib.auth.password_validation.NumericPasswordValidator',
    },
]
LANGUAGE_CODE = 'en-us'
TIME_ZONE = 'America/Chicago'
USE_I18N = True
USE_L10N = True
USE_TZ = True
STATIC_URL = '/static/'

StackTrace：

TemplateDoesNotExist at /catalog/
index.html
Request Method: GET
Request URL:    http://127.0.0.1:8000/catalog/
Django Version: 2.1.5
Exception Type: TemplateDoesNotExist
Exception Value:    
index.html
Exception Location: C:\Users\AjitGoel\Envs\my_django_environment\lib\site-packages\django\template\loader.py in get_template, line 19
Python Executable:  C:\Users\AjitGoel\Envs\my_django_environment\Scripts\python.exe
Python Version: 3.7.2
Python Path:    
['C:\\Users\\AjitGoel\\django-projects\\locallibrary',
 'C:\\Users\\AjitGoel\\Envs\\my_django_environment\\Scripts\\python37.zip',
 'C:\\Users\\AjitGoel\\Envs\\my_django_environment\\DLLs',
 'C:\\Users\\AjitGoel\\Envs\\my_django_environment\\lib',
 'C:\\Users\\AjitGoel\\Envs\\my_django_environment\\Scripts',
 'c:\\users\\ajitgoel\\appdata\\local\\programs\\python\\python37\\Lib',
 'c:\\users\\ajitgoel\\appdata\\local\\programs\\python\\python37\\DLLs',
 'C:\\Users\\AjitGoel\\Envs\\my_django_environment',
 'C:\\Users\\AjitGoel\\Envs\\my_django_environment\\lib\\site-packages']
Server time:    Sun, 10 Feb 2019 23:21:43 -0600
Template-loader postmortem
Django tried loading these templates, in this order:

Using engine django:

django.template.loaders.filesystem.Loader: C:\Users\AjitGoel\django-projects\locallibrary\templates\index.html (Source does not exist)
django.template.loaders.app_directories.Loader: C:\Users\AjitGoel\Envs\my_django_environment\lib\site-packages\django\contrib\admin\templates\index.html (Source does not exist)
django.template.loaders.app_directories.Loader: C:\Users\AjitGoel\Envs\my_django_environment\lib\site-packages\django\contrib\auth\templates\index.html (Source does not exist)

base_generic.html：

<!DOCTYPE html>
<html lang="en">
<head>
  {% block title %}<title>Local Library</title>{% endblock %}
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width, initial-scale=1">
  <link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/bootstrap/4.1.3/css/bootstrap.min.css" integrity="sha384-MCw98/SFnGE8fJT3GXwEOngsV7Zt27NXFoaoApmYm81iuXoPkFOJwJ8ERdknLPMO" crossorigin="anonymous">
  <!-- Add additional CSS in static file -->
  {% load static %}
  <link rel="stylesheet" href="{% static 'css/styles.css' %}">
</head>
<body>
  <div class="container-fluid">
    <div class="row">
      <div class="col-sm-2">
      {% block sidebar %}
        <ul class="sidebar-nav">
          <li><a href="{% url 'index' %}">Home</a></li>
          <li><a href="">All books</a></li>
          <li><a href="">All authors</a></li>
        </ul>
     {% endblock %}
      </div>
      <div class="col-sm-10 ">{% block content %}{% endblock %}</div>
    </div>
  </div>
</body>
</html>

Views.py：

from django.shortcuts import render
from catalog.models import Book, Author, BookInstance, Genre

def index(request):
    # Generate counts of some of the main objects
    num_books = Book.objects.all().count()
    num_instances = BookInstance.objects.all().count()    
    # Available books (status = 'a')
    num_instances_available = BookInstance.objects.filter(status__exact='a').count()    
    # The 'all()' is implied by default.    
    num_authors = Author.objects.count()    
    context = {
        'num_books': num_books,
        'num_instances': num_instances,
        'num_instances_available': num_instances_available,
        'num_authors': num_authors,
    }
    # Render the HTML template index.html with the data in the context variable
    return render(request, 'index.html', context=context)

index.html：

{% extends "base_generic.html" %}

{% block content %}
<h1>Local Library Home</h1>
<p>Welcome to LocalLibrary, a website developed by <em>Mozilla Developer Network</em>!</p>
<h2>Dynamic content</h2>
<p>The library has the following record counts:</p>
<ul>
    <li><strong>Books:</strong> {{ num_books }}</li>
    <li><strong>Copies:</strong> {{ num_instances }}</li>
    <li><strong>Copies available:</strong> {{ num_instances_available }}</li>
    <li><strong>Authors:</strong> {{ num_authors }}</li>
</ul>
{% endblock %}

Answer 1

如果要在应用内放置模板，请遵循以下目录结构

templates/<app_name>/your_template

然后在view.py中以这种方式使用返回render（request，'/ your_template'，context = context）

如果您要将模板放置在templates根目录中，请遵循以下结构

templates/<app_name>/your_template

然后在view.py中以这种方式使用

return render(request, '<app_name>/your_template', context=context)

Answer 2

os.path.join(BASE_DIR, 'templates')

通过这行代码，您添加的模板应该位于项目的根文件夹中。在项目的根目录中创建templates文件夹。

Answer 3

templates目录，您应该像这样在settings.py的{{1}}中添加

TEMPLATES_DIRS

它会做什么，它将在此处指定的目录中查找您创建的模板，即TEMPLATE_DIRS = ( os.path.join(BASE_DIR, "/localllibrary/templates"), )。如果看到它是一个元组或可以是一个列表，则可以在此处添加多个目录。 index.html是您的django项目的根，相对而言，它不是硬编码的。

Answer 4

您的文件结构应如下所示：

import android.support.annotation.NonNull;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.util.Patterns;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.ProgressBar;
import android.widget.Toast;

import com.example.finaldemo.Model.Users;
import com.google.firebase.database.DataSnapshot;
import com.google.firebase.database.DatabaseError;
import com.google.firebase.database.DatabaseReference;
import com.google.firebase.database.FirebaseDatabase;
import com.google.firebase.database.ValueEventListener;

public class LoginActivity extends AppCompatActivity {

    private EditText Email,pswrd;
    private Button Login;
    ProgressBar progressBar;


    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_login);
        Email= (EditText)findViewById(R.id.loginemail);
        pswrd=(EditText) findViewById(R.id.loginpswrd);
        Login=(Button)findViewById(R.id.loginbtn);
        progressBar=(ProgressBar)findViewById(R.id.loginprogressbar);

        Login.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {

                LoginUser();
            }
        });
    }
    private void LoginUser(){
        String email = Email.getText().toString().trim();
        String pwd = pswrd.getText().toString().trim();

        if (email.isEmpty()) {
            Email.setError("Email Required");
            Email.requestFocus();

        }

        else if (!Patterns.EMAIL_ADDRESS.matcher(email).matches()) {
            Email.setError("Enter a valid Email Address");
            Email.requestFocus();

        }

        else if (pwd.isEmpty()) {
            pswrd.setError("Password Required");
            pswrd.requestFocus();

        }else{
            progressBar.setVisibility(View.VISIBLE);
            AllowAccess(email,pwd);
        }
    }

    private void AllowAccess(final String email, final String pwd) {
        final DatabaseReference Rootref;
        Rootref = FirebaseDatabase.getInstance().getReference();

        Rootref.addListenerForSingleValueEvent(new ValueEventListener() {
            @Override
            public void onDataChange(@NonNull DataSnapshot dataSnapshot) {
                if(dataSnapshot.child("Users").child(email).exists()){

                    Users userdata = dataSnapshot.child("Users").child(email).getValue(Users.class);
                    if(userdata.getEmail().equals(email)){
                        if(userdata.getPassword().equals(pwd)){
                            Toast.makeText(LoginActivity.this, "Logged in Successfully", Toast.LENGTH_SHORT).show();
                            progressBar.setVisibility(View.GONE);
                        }

                    }

                }else{
                    progressBar.setVisibility(View.GONE);
                    Toast.makeText(LoginActivity.this, "Account Invalid", Toast.LENGTH_SHORT).show();
                }
            }

            @Override
            public void onCancelled(@NonNull DatabaseError databaseError) {

            }
        });
    }

}

现在，如果您的模板/静态文件位于项目根目录的模板/静态文件夹中，则可以轻松地将其称为import android.content.Intent; import android.support.annotation.NonNull; import android.support.v7.app.AppCompatActivity; import android.os.Bundle; import android.util.Patterns; import android.view.View; import android.widget.EditText; import android.widget.ProgressBar; import android.widget.Toast; import com.google.android.gms.tasks.OnCompleteListener; import com.google.android.gms.tasks.Task; import com.google.firebase.auth.FirebaseAuth; import com.google.firebase.database.DataSnapshot; import com.google.firebase.database.DatabaseError; import com.google.firebase.database.DatabaseReference; import com.google.firebase.database.FirebaseDatabase; import com.google.firebase.database.ValueEventListener; import java.util.HashMap; import java.util.regex.Pattern; public class RegisterActivity extends AppCompatActivity implements View.OnClickListener { private EditText fname,email,pswrd,cpswrd,phone; private static final Pattern PASSWORD_PATTERN = Pattern.compile("^" + "(?=.*[0-9])" + "(?=.*[a-z])" + "(?=.*[A-Z])" + "(?=.*[a-zA-Z])" + "(?=.*[@#$%^&+=])" + "(?=\\S+$)" + ".{8,32}" + "$"); //private FirebaseAuth mAuth; ProgressBar progressBar; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_register); fname = (EditText) findViewById(R.id.regfname); email = (EditText) findViewById(R.id.regemail); pswrd = (EditText) findViewById(R.id.regpassword); cpswrd =(EditText) findViewById(R.id.regcpassword); phone = (EditText) findViewById(R.id.regphone); progressBar = (ProgressBar) findViewById(R.id.progressbar); findViewById(R.id.regbtn).setOnClickListener(this); // mAuth = FirebaseAuth.getInstance(); } @Override public void onClick(View v) { switch (v.getId()){ case R.id.regbtn: createAccount(); break; } } private void createAccount() { String name = fname.getText().toString().trim(); String emailid = email.getText().toString().trim(); String pwd = pswrd.getText().toString().trim(); String cpwd = cpswrd.getText().toString().trim(); String phoneno = phone.getText().toString().trim(); if (name.isEmpty()) { fname.setError("Name Required"); fname.requestFocus(); } else if (emailid.isEmpty()) { email.setError("Email Required"); email.requestFocus(); } else if (!Patterns.EMAIL_ADDRESS.matcher(emailid).matches()) { email.setError("Enter a valid Email Address"); email.requestFocus(); } else if (pwd.isEmpty()) { pswrd.setError("Password Required"); pswrd.requestFocus(); } else if (!PASSWORD_PATTERN.matcher(pwd).matches()) { pswrd.setError("Password should contain atleast 1 upper and lowercase, 1 special char,1 number and should be between 8-32 charcters"); pswrd.requestFocus(); } else if (cpwd.isEmpty()) { cpswrd.setError("Password Required"); cpswrd.requestFocus(); } else if (!pwd.equals(cpwd)) { cpswrd.setError("Password and Confirm Password did not match"); cpswrd.requestFocus(); } else if (phoneno.isEmpty()) { phone.setError("Phone Number is Required"); phone.requestFocus(); } else if (phone.length() != 10) { phone.setError("Enter Valid Phone Number"); phone.requestFocus(); } else{ progressBar.setVisibility(View.VISIBLE); validateUser(name,emailid,pwd,phoneno); } } private void validateUser(final String name, final String emailid, final String pwd, final String phoneno) { final DatabaseReference Rootref; Rootref = FirebaseDatabase.getInstance().getReference(); Rootref.addListenerForSingleValueEvent(new ValueEventListener() { @Override public void onDataChange(@NonNull DataSnapshot dataSnapshot) { if(!(dataSnapshot.child("Users").child(phoneno).exists() || dataSnapshot.child("Users").child(emailid).exists())){ HashMap<String, Object> Userdata = new HashMap<>(); Userdata.put("Name", name); Userdata.put("Email", emailid); Userdata.put("Password", pwd); Userdata.put("Phone", phoneno); Rootref.child("Users").child(phoneno).updateChildren(Userdata).addOnCompleteListener(new OnCompleteListener<Void>() { @Override public void onComplete(@NonNull Task<Void> task) { if(task.isSuccessful()){ Toast.makeText(RegisterActivity.this, "Congratulations, Your account has been created", Toast.LENGTH_SHORT).show(); progressBar.setVisibility(View.GONE); }else{ progressBar.setVisibility(View.GONE); Toast.makeText(RegisterActivity.this,"Network Error", Toast.LENGTH_SHORT).show(); } } }); }else{ Toast.makeText(RegisterActivity.this, "The entered credentials are already Registered", Toast.LENGTH_SHORT).show(); progressBar.setVisibility(View.GONE); } } @Override public void onCancelled(@NonNull DatabaseError databaseError) { Toast.makeText(RegisterActivity.this, "Something went wrong", Toast.LENGTH_SHORT).show(); } }); } }或myProject ├── myProject | ├── __init__.py | ├── settings.py | ├── urls.py | ├── wsgi.py ├── myApp | ├── static <-- Static files can go here | | ├── myApp <-- Create a folder with the same name as the app name, recommended but not required | | | ├── css | | | | ├── style.css | | | ├── js | | | | ├── some.js | ├── templates <-- Templates can be here | | ├── myApp <-- Create a folder with the same name as the app name, recommended but not required | | | ├── index.html | | | ├── other.html | ├── __init__.py | ├── models.py | ├── urls.py | ├── views.py ├── templates <-- Templates can be here too | ├── sometemplate.html ├── static <-- Static files can go here too | ├── css | | ├── somecss.css | ├── js。
如果它位于您应用程序的模板文件夹中，则如下所示：

someplace.html

然后您可以像这样使用它：css/somecss.css。但是建议您在模板文件夹中使用应用名称创建另一个文件夹，以避免混淆，例如：

myApp --> templates --> myTemplate.html

现在，您将这样称呼它：myTemplate.html，这样可以避免混淆，因为您将知道来自哪个应用程序模板，并且还可以使用具有相同名称的模板（例如{{1} }或myApp --> templates --> myApp --> myTemplate.html）。静态文件也是如此。

Django：/ catalog /中的TemplateDoesNotExist错误

4 个答案: