description .
To set up a Django project with SQLite using the command line, follow these steps:
进入虚拟环境
cd ~/Desktop/myproject
Once you're in the desired directory, create a virtual environment for your project using the following command:
python3 -m venv myvenv
This will create a new virtual environment in a directory called "myvenv" within your project directory.
Activate the virtual environment by running the following command:
bash
source myvenv/bin/activate
You should see the name of your virtual environment appear in your terminal prompt.
Install Django within the virtual environment using the following command:
pip install Django
Create a new Django project using the following command:
django-admin startproject myproject
This will create a new directory called "myproject" with the basic structure of a Django project.
Navigate to the "myproject" directory using the cd command.
Open the "settings.py" file located within the "myproject" directory using a text editor of your choice. 默认使用 SQLite
arduino
DATABASES = {
'default': {
'ENGINE': 'django.db.backends.sqlite3',
'NAME': BASE_DIR / 'db.sqlite3',
}
}Run the following command to create the initial database schema:
python manage.py migrate
Your project is now ready to use SQLite as its database backend. You can start the development server by running the following command:
python manage.py runserver
This will start the development server on your local machine, and you can access your project by navigating to http://127.0.0.1:8000/ in your web browser.
To create a new app named "HOME" in your Django project using the command line, follow these steps:
-
Open a terminal or command prompt on your computer.
-
Navigate to the root directory of your Django project using the
cdcommand. For example, if your project is located in a directory called "myproject" on your desktop, you can use the following command:bashCopy code cd ~/Desktop/myproject -
Once you're in the root directory of your project, run the following command to create a new app named "HOME":
Copy code python manage.py startapp HOMEThis will create a new directory called "HOME" within your project directory, with the basic structure of a Django app.
-
Open the "settings.py" file located within the "myproject" directory using a text editor of your choice.
-
Locate the "INSTALLED_APPS" section of the "settings.py" file and add the name of your new app to the list. In this case, you would add
'HOME',to the list of installed apps.cssCopy code INSTALLED_APPS = [ 'django.contrib.admin', 'django.contrib.auth', 'django.contrib.contenttypes', 'django.contrib.sessions', 'django.contrib.messages', 'django.contrib.staticfiles', 'HOME',] -
Save the changes to the "settings.py" file and close the text editor.
Your new "HOME" app is now ready to use. You can create views, models, templates, and other components of your app in the appropriate directories within the app directory.
Sure, here's an example HTML page written using Bootstrap 3.4.1 that could be used as the home page of your Django project:
javascriptCopy code{% extends 'base.html' %}
{% block content %}
<div class="jumbotron">
<h1>Welcome to my Django project!</h1>
<p class="lead">This is the home page of my project.</p>
<a class="btn btn-primary btn-lg" href="#" role="button">Learn more</a>
</div>
{% endblock %}
This is a Django template that extends a base template called "base.html". You'll need to create this base template and include the appropriate Bootstrap CSS and JavaScript files.
Here's an example of what the "base.html" file might look like:
phpCopy code<!doctype html>
<html lang="en">
<head>
<!-- Required meta tags -->
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no">
<!-- Bootstrap CSS -->
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.4.1/css/bootstrap.min.css">
<title>{% block title %}My Django Project{% endblock %}</title>
</head>
<body>
<div class="container">
{% block content %}
{% endblock %}
</div>
<!-- Optional JavaScript -->
<!-- jQuery first, then Popper.js, then Bootstrap JS -->
<script src="https://code.jquery.com/jquery-3.5.1.min.js"></script>
<script src="https://cdn.jsdelivr.net/npm/[email protected]/dist/umd/popper.min.js"></script>
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.4.1/js/bootstrap.min.js"></script>
</body>
</html>
This base template includes the necessary Bootstrap CSS and JavaScript files and provides a container for your content. You can then use the {% block content %} and {% endblock %} tags to define the content of each page.
Once you've created these templates, you'll need to configure your Django project to use them. You can do this by updating the "TEMPLATES" section of your project's settings file to include the directories where your templates are stored. Here's an example of what that might look like:
cssCopy codeTEMPLATES = [ { 'BACKEND': 'django.template.backends.django.DjangoTemplates', 'DIRS': ['path/to/templates/directory'],
'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',
],
},
},
]
Make sure to replace 'path/to/templates/directory' with the actual path to your templates directory. Once you've done this, your Django project should be able to find and use your templates.
i want edit a page to manage some ip addrs, there is a table. the columns are id, dynamic ip, host status, user name, latest update. can you give me the html with bootstrap 3.4.1 and using a django template? give the template code of html.
Sure, here's an example Django template that uses Bootstrap 3.4.1 to display a table of IP addresses:
javascript
{% extends 'base.html' %}
{% block content %}
<div class="container">
<h1>IP Address Management</h1>
<p>
<a class="btn btn-primary" href="#">Add IP Address</a>
</p>
<table class="table table-striped">
<thead>
<tr>
<th>ID</th>
<th>Dynamic IP</th>
<th>Host Status</th>
<th>User Name</th>
<th>Latest Update</th>
<th>Action</th>
</tr>
</thead>
<tbody>
{% for ip_address in ip_addresses %}
<tr>
<td>{{ ip_address.id }}</td>
<td>{{ ip_address.dynamic_ip }}</td>
<td>{{ ip_address.host_status }}</td>
<td>{{ ip_address.user_name }}</td>
<td>{{ ip_address.latest_update }}</td>
<td>
<a class="btn btn-primary" href="#">Edit</a>
<a class="btn btn-danger" href="#">Delete</a>
</td>
</tr>
{% endfor %}
</tbody>
</table>
</div>
{% endblock %}
In this example, we're extending the "base.html" template and adding a container with a header, a "Add IP Address" button, and a table to display the IP addresses.
We're using a Bootstrap table with striped rows to make it easier to read. The table has six columns: ID, Dynamic IP, Host Status, User Name, Latest Update, and Action.
We're then using a Django for loop to iterate through a list of IP addresses and display them in the table. For each IP address, we're displaying the ID, Dynamic IP, Host Status, User Name, Latest Update, and two buttons for editing or deleting the IP address.
You'll need to define a view and a model in your Django project to provide the list of IP addresses to the template. Once you have that set up, you can render this template using the render function in your Django view.
can you give me the operating functions to the table in django ?
Sure, here are the basic Django functions you'll need to perform CRUD operations (Create, Read, Update, Delete) on the ip_addresses table:
Create a new IP address:
To create a new IP address in Django, you'll need to define a model to represent the data in the ip_addresses table. Here's an example model:
python
from django.db import models
class IPAddress(models.Model):
dynamic_ip = models.CharField(max_length=100)
host_status = models.CharField(max_length=100)
user_name = models.CharField(max_length=100)
latest_update = models.DateTimeField(auto_now=True)
This model defines four fields to match the columns in the ip_addresses table: dynamic_ip, host_status, user_name, and latest_update. The latest_update field is a DateTimeField that will automatically update to the current time whenever the IP address is saved.
Once you have a model defined, you can create new IP addresses using the create method on the model:
python
IPAddress.objects.create(
dynamic_ip='192.168.0.1',
host_status='Active',
user_name='admin'
)
This code will create a new IPAddress object and save it to the database.
Read IP addresses:
To read IP addresses from the database in Django, you can use the objects.all() method on the model:
python
ip_addresses = IPAddress.objects.all()
This will return a queryset containing all of the IP addresses in the database. You can then pass this queryset to a template for display.
Update an IP address:
To update an existing IP address in Django, you can retrieve the object from the database using its ID and then update its fields using the dot notation:
python
ip_address = IPAddress.objects.get(id=1)
ip_address.host_status = 'Inactive'
ip_address.save()
This code will retrieve the IP address with ID 1 from the database, update its host_status field, and save the changes to the database.
Delete an IP address:
To delete an existing IP address in Django, you can retrieve the object from the database using its ID and then call the delete method:
python
ip_address = IPAddress.objects.get(id=1)
ip_address.delete()
This code will retrieve the IP address with ID 1 from the database and delete it from the database.
i want to use get method to create entries, can you give me the view.py utils code ?
Sure, here's an example views.py file that uses a Django form to create new entries in the ip_addresses table using the GET method:
python
from django.shortcuts import render
from .forms import IPAddressForm
from .models import IPAddress
def create_ip_address(request):
form = IPAddressForm(request.GET or None)
if form.is_valid():
ip_address = form.save(commit=False)
ip_address.save()
ip_addresses = IPAddress.objects.all()
return render(request, 'ip_addresses.html', {'form': form, 'ip_addresses': ip_addresses})
This view function uses a GET request to render a form (IPAddressForm) that allows the user to input values for the dynamic_ip, host_status, and user_name fields. When the form is submitted, the is_valid() method is called to validate the form data, and if the form is valid, a new IPAddress object is created and saved to the database.
Finally, the view retrieves all of the IP addresses from the database and passes them to the ip_addresses.html template for display.
Note that in this example, we're using the request.GET parameter to populate the form with any query string parameters that were included in the URL. You could also use request.POST instead to handle form submissions via POST instead of GET.
ok, i will consider this. can you give me the post method version, and the web page html code of this ? using bootstrap 3.4.1 template
Certainly! Here's an example views.py file that uses a Django form to create new entries in the ip_addresses table using the POST method:
python
from django.shortcuts import render
from .forms import IPAddressForm
from .models import IPAddress
def create_ip_address(request):
if request.method == 'POST':
form = IPAddressForm(request.POST)
if form.is_valid():
ip_address = form.save(commit=False)
ip_address.save()
else:
form = IPAddressForm()
ip_addresses = IPAddress.objects.all()
return render(request, 'ip_addresses.html', {'form': form, 'ip_addresses': ip_addresses})
In this version, we're checking for a POST request using if request.method == 'POST', and creating the IPAddressForm object using request.POST. If the form is valid, we create a new IPAddress object and save it to the database.
Here's an example ip_addresses.html template that displays the IP addresses in a table, and includes a form for creating new IP addresses:
html
{% extends "base.html" %}
{% block content %}
<h1>IP Addresses</h1>
<table class="table table-striped">
<thead>
<tr>
<th>ID</th>
<th>Dynamic IP</th>
<th>Host Status</th>
<th>User Name</th>
<th>Latest Update</th>
</tr>
</thead>
<tbody>
{% for ip_address in ip_addresses %}
<tr>
<td>{{ ip_address.id }}</td>
<td>{{ ip_address.dynamic_ip }}</td>
<td>{{ ip_address.host_status }}</td>
<td>{{ ip_address.user_name }}</td>
<td>{{ ip_address.latest_update }}</td>
</tr>
{% endfor %}
</tbody>
</table>
<h2>Create IP Address</h2>
<form method="post">
{% csrf_token %}
{{ form.as_p }}
<button type="submit" class="btn btn-primary">Save</button>
</form>
{% endblock %}
This template includes a table that displays the ID, Dynamic IP, Host Status, User Name, and Latest Update for each IP address in the database. It also includes a form for creating new IP addresses, which is generated using the {{ form.as_p }} template tag. When the form is submitted, the CSRF token is included for security purposes using {% csrf_token %}. Finally, a submit button is included using <button type="submit" class="btn btn-primary">Save</button>.
i also think there should be a function for file download. when there is a get request, the server will give the json file which contains the table data, and send it to user
Sure! Here's an updated version of the views.py file that includes a function to generate a JSON file containing the data from the ip_addresses table, and allows users to download it using a GET request:
python
import json
from django.http import HttpResponse
from django.shortcuts import render
from .forms import IPAddressForm
from .models import IPAddress
def create_ip_address(request):
if request.method == 'POST':
form = IPAddressForm(request.POST)
if form.is_valid():
ip_address = form.save(commit=False)
ip_address.save()
else:
form = IPAddressForm()
ip_addresses = IPAddress.objects.all()
return render(request, 'ip_addresses.html', {'form': form, 'ip_addresses': ip_addresses})
def download_ip_addresses(request):
ip_addresses = IPAddress.objects.all().values()
data = json.dumps(list(ip_addresses))
response = HttpResponse(data, content_type='application/json')
response['Content-Disposition'] = 'attachment; filename="ip_addresses.json"'
return response
This version includes a new function called download_ip_addresses() that retrieves all the IP addresses from the database using IPAddress.objects.all().values(), and converts them to a JSON-formatted string using the json.dumps() function. It then creates an HttpResponse object with the JSON data, sets the content type to application/json, and adds a Content-Disposition header to specify the filename of the downloaded file.
To allow users to download the file, you can add a link to the ip_addresses.html template that points to the download_ip_addresses URL:
html
{% extends "base.html" %}
{% block content %}
<h1>IP Addresses</h1>
<table class="table table-striped">
<thead>
<tr>
<th>ID</th>
<th>Dynamic IP</th>
<th>Host Status</th>
<th>User Name</th>
<th>Latest Update</th>
</tr>
</thead>
<tbody>
{% for ip_address in ip_addresses %}
<tr>
<td>{{ ip_address.id }}</td>
<td>{{ ip_address.dynamic_ip }}</td>
<td>{{ ip_address.host_status }}</td>
<td>{{ ip_address.user_name }}</td>
<td>{{ ip_address.latest_update }}</td>
</tr>
{% endfor %}
</tbody>
</table>
<h2>Create IP Address</h2>
<form method="post">
{% csrf_token %}
{{ form.as_p }}
<button type="submit" class="btn btn-primary">Save</button>
</form>
<h2>Download IP Addresses</h2>
<p><a href="{% url 'download_ip_addresses' %}" class="btn btn-primary">Download</a></p>
{% endblock %}
This template includes a new section that displays a "Download IP Addresses" heading, and a download link that points to the download_ip_addresses URL using the {% url %} template tag. When the user clicks the link, the download_ip_addresses() function will be called, and the JSON file will be downloaded to the user's computer.
do you think the script get latest_update, dynamic_ip those 2 values itself automatically is better ?
It depends on the specific requirements of your project. If you want to automatically capture the latest update time and the dynamic IP address of the client making the request, you could modify the create_ip_address function to extract these values from the request object and include them in the JSON data. Here's an example of how you could modify the function to do this:
powershell
# Function to create a new IP address entry using a POST request
function create_ip_address {
$url = "$base_url/ip_addresses/create/"
$data = @{
dynamic_ip = $env:REMOTE_ADDR
host_status = "Active"
user_name = "johndoe"
latest_update = Get-Date -Format "yyyy-MM-dd HH:mm:ss"
}
$json = $data | ConvertTo-Json
$headers = @{
"Content-Type" = "application/json"
}
$response = curl -X POST -H $headers -d $json $url
return $response
}
In this version of the create_ip_address function, the dynamic_ip value is set to the IP address of the client making the request, which is accessed using the $env:REMOTE_ADDR environment variable. The latest_update value is set to the current date and time, which is obtained using the Get-Date cmdlet and formatted as a string using the "yyyy-MM-dd HH:mm:ss" format specifier.
If you want to capture additional information about the client or the request, you could explore other environment variables that are available to PowerShell scripts, such as $env:HTTP_USER_AGENT for the user agent string or $env:HTTP_REFERER for the referring URL.
thank, i mean pc dose these before shutdown, can you wirte it into the script?
If you want to execute some code on a client's PC before it shuts down, you can create a Windows PowerShell script that listens for the Windows Event Log event indicating that the PC is about to shut down. You can then include code in the script to send a request to your web server to update the host_status field for the corresponding IP address entry.
Here's an example PowerShell script that listens for the 1074 event ID, which is generated when the system is shutting down:
powershell
$Log = 'System'
$EventID = 1074
# Start the event log watcher
$Watcher = New-Object System.Diagnostics.Eventing.Reader.EventLogWatcher("`<QueryList>`<Query Id=`"0`" Path=`"$Log`"`<Select Path=`"$Log`"`>[System[(EventID=$EventID)]]`</Select>`</Query>`</QueryList>")
$Watcher.EventRecordWrittenEvent += {
$ShutdownEvent = $_.EventRecord
# Extract the reason for the shutdown from the event data
$Reason = ($ShutdownEvent.Properties.Value | Where-Object {$_.Name -eq 'ReasonCode'}).Value
# Send a request to update the host status for the corresponding IP address entry
Invoke-WebRequest -Uri 'http://your-web-server/update-host-status/' -Method POST -Body @{
ip_address = '192.168.1.100'
host_status = 'shutdown'
reason = $Reason
}
}
# Start the event log watcher
$Watcher.Start()
This script listens for the 1074 event ID in the System event log, which is generated when the system is shutting down. When the script receives the event, it extracts the reason for the shutdown from the event data and sends a request to update the host status for the corresponding IP address entry. You'll need to modify the ip_address parameter in the Invoke-WebRequest command to match the IP address of the client that is shutting down.
so there shuld be a function in server to receive shutdown signal, right ?
Yes, that's correct. You'll need to create a server-side function that can receive the shutdown signal from the client and update the host_status field for the corresponding IP address entry in the database.
Here's an example Django view that handles the shutdown signal:
python
from django.http import JsonResponse
from django.views.decorators.http import require_POST
from myapp.models import IPAddress
@require_POST
def update_host_status(request):
ip_address = request.POST.get('ip_address')
host_status = request.POST.get('host_status')
reason = request.POST.get('reason')
try:
# Get the corresponding IP address entry from the database
ip_obj = IPAddress.objects.get(ip=ip_address)
# Update the host status and reason fields
ip_obj.host_status = host_status
ip_obj.reason = reason
ip_obj.save()
return JsonResponse({'success': True})
except IPAddress.DoesNotExist:
return JsonResponse({'success': False, 'error': 'IP address not found'})
This view expects a POST request with three parameters: ip_address, host_status, and reason. It then updates the corresponding IPAddress object in the database with the provided host_status and reason values.
You'll need to add the update_host_status view to your urls.py file, so that it can be accessed via a URL. For example:
python
from django.urls import path
from myapp.views import update_host_status
urlpatterns = [
path('update-host-status/', update_host_status, name='update_host_status'),
# ... other URL patterns ...
]
Once you have this view set up on your server, you can modify the PowerShell script to send a POST request to the update-host-status URL with the appropriate parameters when it receives the shutdown event.
您可以通过以下命令查看SQLite数据库中的所有表：
SELECT name FROM sqlite_master WHERE type='table' order by name;
这个命令将返回一个按字母顺序排列的表名列表。
如果您想查看特定表的结构，可以使用以下命令：
SELECT * FROM sqlite_master WHERE type='table' AND name='table_name';
其中，table_name是您要查看的表的名称。
添加并启动定时任务
#添加并启动定时任务
python manage.py crontab add其它命令：
#显示当前的定时任务
python manage.py crontab show
#删除所有定时任务
python manage.py crontab removesettings.py 中 INSTALLED APPS 怎么使用？