按钮点击功能与postgresql连接答案

【问题标题】：Button click function Connect with postgresql按钮点击功能与postgresql连接
【发布时间】：2021-02-24 11:13:34
【问题描述】：

我是 Django 和 Python 的新手。我创建一个带有表格的网站。我想在我现有的表格中添加一个新列，点击 html 网站上的按钮。有没有人可以告诉我如何解决这个问题？谢谢在这个链接中，我上传了我项目中的所有文件。我用pycharm、python、django写的。

【问题讨论】：

请看How to Ask
在 HTML 中的表格中添加一列与 django 或 python 无关。将您的问题设为 HTML、CSS 和 jquery 标记。另外，如果您有任何问题，请在这里分享一些代码！

标签： python django database postgresql

【解决方案1】：

'''    Timeline.html:
        {% extends 'blog/base.html' %}
        {% block blogContent %}
        
            {% if request.user.is_authenticated %}
            <form action="{% url 'blog:create_post' %}" method="post">
                {{ post_form }}
                {% csrf_token %}
                <button type="submit">Add message</button>
            </form>
             {% endif %}
        
        
            {% if request.user.is_authenticated %}
            <form action="{% url 'blog:create_column' %}" method="post">
                {{ column_form }}
                {% csrf_token %}
                <button type="submit">Add column</button>
            </form>
        
            {% endif %}
        
            {% if request.user.is_authenticated %}
                <form action="{% url 'blog:new_column' %}" method="post">
                    {% csrf_token %}
                    {{ newcolumn_form }}
                    <button type="submit">New column</button>
                </form>
            {% endif %}
        
        
        
            <style>
            table, th, td {
              border: 1px solid black;
              border-collapse: collapse; }
            </style>
        
        
        
            <table>
                <tr>
                    <th>ID</th>
                    <th>Message</th>
                    <th>Erstellt am</th>
                    <th>User_ID</th>
                    <th>Spalte</th>
        
                </tr>
                {% for post in posts %}
                <tr>
                    <td> {{ post.id }} </td>
                    <td> {{ post.message }} </td>
                    <td> {{ post.created_at }} </td>
                    <td> {{ post.user_id}} </td>
                    <td> {{ post.created_attt}} </td>
        
                </tr>
                {% endfor %}
            </table>
        
        {% for post in posts %}
            {% empty %}
                {% if user == request.user %}
                <p> Du hast noch keinen Eintrag verfasst</p>
                {% else %}
                <p> {{ user.username }} hat noch keinen Eintrag verfasst</p>
                {% endif %}
        {% endfor %}
        
        {% endblock %}
'''

【讨论】：

【解决方案2】：

'''    '''URLS.py
    from django.urls import path
    from . import views
    
    app_name = 'blog'
    urlpatterns = [
        path('', views.index, name='index'),
        path('<str:username>/timeline/', views.timeline_view, name='timeline'),
        path('create-post/', views.post_view, name='create_post'),
        path('create-column/', views.column_view, name='create_column'),
        path('new-column/', views.newcolumn_view, name='new_column'),
    ]
    
    models.py:
    from django.contrib.auth.models import User
    from django.db import models
    from django.utils import timezone
    
    
    class BlogPost (models.Model):
        user = models.ForeignKey(User, on_delete=models.CASCADE)
        message = models.CharField(max_length=250)
        created_at = models.DateTimeField(default=timezone.now)
        created_attt = models.CharField(max_length=222, default='')
    
    
    views.py:
    import logging
    
    from django.contrib.auth.decorators import login_required
    from django.contrib.auth.models import User
    from django.http import HttpResponseRedirect
    from django.shortcuts import render, get_object_or_404
    from django.urls import reverse
    from django.views.decorators.http import require_POST
    from .forms import PostForm, CreateForm, NewColumnForm
    from .models import BlogPost
    
    def index(request):
        return render(request, 'blog/base.html')
    
    def timeline_view(request, username):
        post_form = PostForm()
        column_form = CreateForm()
        newcolumn_form = NewColumnForm()
        user = get_object_or_404(User, username=username)
        posts = BlogPost.objects.filter(user=user).order_by('-created_at')
        return render(request, 'blog/timeline.html', {'posts': posts, 'post_form': post_form, 'column_form': column_form, 'user': user, 'newcolumn_form': newcolumn_form})
    
    @login_required
    @require_POST
    def post_view(request):
        post_form = PostForm(request.POST)
        logging.debug(post_form)
        if post_form.is_valid():
            post = post_form.save(commit=False)
            post.user = request.user
            post.save()
        return HttpResponseRedirect(reverse('blog:timeline', kwargs={'username': request.user.username}))
    
    @login_required
    @require_POST
    def column_view(request):
        column_form = CreateForm(request.POST)
        if column_form.is_valid():
            createcolumn = column_form.save(commit=False)
            createcolumn.user = request.user
            createcolumn.save()
        return HttpResponseRedirect(reverse('blog:timeline', kwargs={'username': request.user.username}))
    
    @login_required
    @require_POST
    def newcolumn_view(request):
        newcolumn_form = CreateForm(request.POST)
        if newcolumn_form.is_valid():
            newcolumn = newcolumn_form.save(commit=False)
            newcolumn.user = request.user
            newcolumn.save()
        return HttpResponseRedirect(reverse('blog:timeline', kwargs={'username': request.user.username}))
    
    
    
    
    
    
    
    
    
    
    
    
    
'''

【讨论】：

【解决方案3】：

''' forms.py :
    from django import forms
    
    from .models import BlogPost
    
    
    class PostForm(forms.ModelForm):
        class Meta:
            model = BlogPost
            fields = ['message', ]
            labels = {
                'message': 'Nachricht',
    
            }
    
    
    class CreateForm(forms.ModelForm):
        class Meta:
            model = BlogPost
            fields = ['created_attt', ]
            labels = {
                'created_attt': 'Spalte',
            }
    
    
    class NewColumnForm(forms.ModelForm):
        class Meta:
            model = BlogPost
            exclude = []
            fields = ['created_attt', ]
            labels = {
                'created_attt': 'Neue Spalte',
            }
    
    
'''

【讨论】：