Next, we will implement the folder and task creation functions.

List of articles

Create a Todo app with Django ① Build an environment with Docker Create a Todo app with Django ② Create a folder list page Create a Todo app with Django ③ Create a task list page Create Todo app with Django ④ Implementation of folder and task creation function Create a Todo app with Django ⑤ Create a task editing function

Implementation of folder creation function

URL settings

First, set the URL based on the following definition.

URL	processing
/folders/create	Create a new folder

To get this design, add the following sentence to todo / urls.py.

`todo/urls.py`


path('create', views.create_folder, name='folders.create')

Form creation

First, create a file called forms.py under the todo directory. This file is the file you need to create the form.

Edit forms.py as follows.

`forms.py`


from django import forms
from .models import Folder

class FolderForm(forms.ModelForm):
    def __init__(self, *args, **kwargs):
        super(FolderForm, self).__init__(*args, **kwargs)
        for field in self.fields.values():
            field.widget.attrs = {
                'class': 'form-control'
            }
    class Meta:
        model = Folder
        fields = ('title',)
        labels = {'title' : 'Folder name'}

The forms and Folder models needed to create a form are imported in lines 1 and 2. In the \ _ \ _ init \ _ \ _ part, the class name of FolderForm is form-control. This is to apply bootstrap.

django has a class called django.forms.ModelForm that automatically creates a Field based on the Model class. It seems convenient to use the ModelForm class for registration and update processing.

The meanings of variables in the Meta class are as follows.

Variable name	meaning
model	Specify the Model class to be linked
fields	Specify the target field to generate the input form from Model in tuple format
labels	Change the display name of the input field. (For example, if not specified this time, the display name will be "title")

Link to folder creation page

Add the link as follows to the part of templates / index.html where the folder is added.

`index.html`


<a href="{% url 'folders.create' %}" class="btn btn-default btn-block">

template

Create create_folders.html under the templates directory. Edit create_folders.html as follows.

`templates/create_folders.html`


{% load static %}
<!DOCTYPE html>
<html lang="ja">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <meta http-equiv="X-UA-Compatible" content="ie=edge">
  <title>Todo</title>
  <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css">
  <link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/bootflat/2.0.4/css/bootflat.min.css">
  <link rel="stylesheet" href="{% static 'css/style.css' %}">
</head>
<body>
  <header>
    <nav class="my-navbar">
      <a class="my-navbar-brand" href="/">Todo</a>
    </nav>
  </header>
  <main>
    <div class="container">
        <div class="row">
          <div class="col col-md-offset-3 col-md-6">
            <nav class="panel panel-default">
              <div class="panel-heading">Add a folder</div>
              <div class="panel-body">
                <form method="POST">
                  {% csrf_token %}
                  {{ form.as_p }}
                  <div class="text-right">
                      <button type="submit" class="btn btn-primary">Send</button>
                  </div>
                </form>
              </div>
            </nav>
          </div>
        </div>
      </div>
  </main>
</body>
</html>

CSRF measures are taken in the following parts.

`templates/create_folders.html`


{% csrf_token %}

In addition, the form for creating a folder is expanded in the following part.

`create_folders.html`


{{ form.as_p }}

What is ʻas_p`?

<p>
contents of form
</p>

It means that it will be developed in the form of.

Next, I will write a view.

View Add the following create_folder method to the view.

`views.py`


from django.shortcuts import render, get_object_or_404, redirect#Added redirect function
from .forms import FolderForm


def create_folder(request):
    if request.method == "POST":
        form = FolderForm(request.POST)
        if form.is_valid():
            folder = form.save(commit=False)
            folder.created_at = timezone.now()
            folder.save()
            return redirect('tasks.index', id=folder.id)
    else:
        form = FolderForm()
    return render(request, 'create_folders.html', {'form': form})

First of all, we are importing the FolderForm and redirect functions we created.

After that, we define the create_folder function. When data is added to request.POST, the processing of the if statement is written so that the contents entered in the form are saved in the database.

Verification

The folder creation function is now implemented! Try http: // localhost: 8000 / folders / create, and if it looks like the following, it's OK! フォルダー作成機能.png

Implementation of task creation function

URL settings

First, set the URL based on the following definition.

URL	processing
<int:id>/tasks/create	Create a new task

To get this design, add the following sentence to todo / urls.py.

`todo/urls.py`


path('<int:id>/tasks/create', views.create_task, name='tasks.create')

Form creation

Create a form for task creation in forms.py. Add the following TaskForm class

`todo/forms.py`


from .models import Folder, Task#Import Task model

class TaskForm(forms.ModelForm):
    def __init__(self, *args, **kwargs):
        super(TaskForm, self).__init__(*args, **kwargs)
        for field in self.fields.values():
            field.widget.attrs = {
                'class': 'form-control'
            }
    class Meta:
        STATUS_CHOICES = [(1, 'Incomplete'),(2, 'Working'),(3, 'Done')]
        model = Task
        fields = ('title', 'status','due_date')
        labels = {
            'title': 'Task name',
            'status': 'Status',
            'due_date': 'Deadline',
        }

First of all, we are importing the Task model. And we are adding the TaskForm class.

Link to folder creation page

Add the link as follows to the Add task part of templates / index.html.

`index.html`


<a href="{% url 'tasks.create' id=current_folder
_id %}" class="btn btn-default btn-block">

template

Create create_tasks.html under the templates directory. Edit create_tasks.html as follows.

`templates/create_tasks.html`


{% load static %}
<!DOCTYPE html>
<html lang="ja">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <meta http-equiv="X-UA-Compatible" content="ie=edge">
  <title>Todo</title>
  <link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/flatpickr/dist/flatpickr.min.css">
  <link rel="stylesheet" href="https://npmcdn.com/flatpickr/dist/themes/material_blue.css">
  <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css">
  <link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/bootflat/2.0.4/css/bootflat.min.css">
  <link rel="stylesheet" href="{% static 'css/style.css' %}">
</head>
<body>
<header>
  <nav class="my-navbar">
    <a class="my-navbar-brand" href="/">Todo</a>
  </nav>
</header>
<main>
    <div class="container">
        <div class="row">
          <div class="col col-md-offset-3 col-md-6">
            <nav class="panel panel-default">
              <div class="panel-heading">Add a task</div>
              <div class="panel-body">
                <form method="POST">
                  {% csrf_token %}
                  {{ form.as_p }}
                  <div class="text-right">
                    <button type="submit" class="btn btn-primary">Send</button>
                  </div>
                </form>
              </div>
            </nav>
          </div>
        </div>
      </div>
</main>

<script src="https://npmcdn.com/flatpickr/dist/flatpickr.min.js"></script>
<script src="https://npmcdn.com/flatpickr/dist/l10n/ja.js"></script>
<script>
  flatpickr(document.getElementsByName('due_date'), {
    locale: 'ja',
    minDate: new Date()
  });
</script>
</body>
</html>

Next, I will write a view.

View Add the following create_task method to the view.

`views.py`


from .forms import FolderForm, TaskForm#Import TaskForm

def create_task(request, id):
    #Get the selected folder
    current_folder = get_object_or_404(Folder, id=id)
    if request.method == "POST":
        form = TaskForm(request.POST)
        if form.is_valid():
            task = form.save(commit=False)
            task.created_at = timezone.now()
            task.folder_id = current_folder
            task.save()
            return redirect('tasks.index', id=current_folder.id)
    else:
        form = TaskForm()
    return render(request, 'create_tasks.html', {'form': form}, {'id':current_folder.id})

The following parts should be noted.

task.folder_id = current_folder

folder_id is a foreign key, but you need to pass an object when setting the foreign key (in this case the Folder object).

Template extension

Templates are useful when you want to use the same information and layout in multiple places. You don't have to repeat it in each file.

To create the original template, create a base.html file under the todo / templates directory.

templates
├── base.html
├── create_folders.html
├── create_tasks.html
└── index.html

Edit base.html as follows.

`base.html`


{% load static %}
<html lang="ja">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <meta http-equiv="X-UA-Compatible" content="ie=edge">
  <title>Todo</title>
  {% block styles %}
  {% endblock %}
  <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css">
  <link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/bootflat/2.0.4/css/bootflat.min.css">
  <link rel="stylesheet" href="{% static 'css/style.css' %}">
</head>
<body>
<header>
  <nav class="my-navbar">
    <a class="my-navbar-brand" href="{% url 'tasks.index' id=1 %}">Todo</a>
  </nav>
</header>
<main>
    {% block content %}
    {% endblock %}
</main>
{% block scripts %}
{% endblock %}
</body>
</html>

The following part, HTML will be inserted.

  {% block styles %}
  {% endblock %}

You can extend base.html by writing the following at the beginning of the file.

{% extends 'base.html' %}

Based on this, edit create_folders.html, create_tasks, and ʻindex.html` as follows.

`create_folders.html`


{% extends 'base.html' %}

{% block content %}
  <div class="container">
    <div class="row">
      <div class="col col-md-offset-3 col-md-6">
        <nav class="panel panel-default">
          <div class="panel-heading">Add a folder</div>
          <div class="panel-body">
            <form method="POST">
              {% csrf_token %}
              {{ form.as_p }}
              <div class="text-right">
                  <button type="submit" class="btn btn-primary">Send</button>
              </div>
            </form>
          </div>
        </nav>
      </div>
    </div>
  </div>
{% endblock %}

`create_tasks.html`


{% extends 'base.html' %}

{% block styles %}
  <link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/flatpickr/dist/flatpickr.min.css">
  <link rel="stylesheet" href="https://npmcdn.com/flatpickr/dist/themes/material_blue.css">
{% endblock %}

{% block content %}
  <div class="container">
    <div class="row">
      <div class="col col-md-offset-3 col-md-6">
        <nav class="panel panel-default">
          <div class="panel-heading">Add a task</div>
          <div class="panel-body">
            <form method="POST">
              {% csrf_token %}
              {{ form.as_p }}
              <div class="text-right">
                <button type="submit" class="btn btn-primary">Send</button>
              </div>
            </form>
          </div>
        </nav>
      </div>
    </div>
  <div>
{% endblock %}

{% block scripts %}
  <script src="https://npmcdn.com/flatpickr/dist/flatpickr.min.js"></script>
  <script src="https://npmcdn.com/flatpickr/dist/l10n/ja.js"></script>
  <script>
    flatpickr(document.getElementsByName('due_date'), {
      locale: 'ja',
      minDate: new Date()
    });
  </script>
{% endblock %}

`index.html`


{% extends 'base.html' %}

{% block content %}
  <div class="container">
    <div class="row">
      <div class="col col-md-4">
        <nav class="panel panel-default">
          <div class="panel-heading">folder</div>
          <div class="list-group">
            {% for folder in folders %}
            <a 
            href="{% url 'tasks.index' id=folder.id %}",
            class="list-group-item {% if current_folder_id == folder.id %}active{% endif %}"
          　>
              {{ folder.title }}
            </a>
            {% endfor %}
          </div>
          <div class="panel-body">
            <a href="{% url 'folders.create' %}" class="btn btn-default btn-block">
Add a folder
            </a>
          </div>
        </nav>
      </div>
      <div class="column col-md-8">
        <div class="panel panel-default">
          <div class="panel-heading">task</div>
          <table class="table">
            <thead>
            <tr>
              <th>title</th>
              <th>Status</th>
              <th>Deadline</th>
              <th></th>
            </tr>
            </thead>
            <tbody>
              {% for task in tasks %}
                <tr>
                  <td>{{ task.title }}</td>
                  <td>
                    <span 
                    class="label {% if task.status == 1 %}label-danger{% endif %}{% if task.status == 2 %}label-info{% endif %}"
                    >
                    {{ task.get_status_display }}
                    </span>
                  </td>
                  <td>{{ task.due_date }}</td>
                  <td><a href="{% url 'tasks.edit' id=current_folder_id task_id=task.id %}">Edit</a></td>
                </tr>
              {% endfor %}
            </tbody>
          </table>
          <div class="panel-body">
            <div class="text-right">
              <a href="{% url 'tasks.create' id=current_folder_id  %}" class="btn btn-default btn-block">
Add a task
              </a>
            </div>
          </div>
        </div>
      </div>
    </div>
  </div>
{% endblock %}

in conclusion

This is the end of this chapter! The code so far can be found in the repository's chapter4 branch. In the next chapter, we will implement the task editing function!

[PYTHON] Create a Todo app with Django ④ Implement folder and task creation functions

List of articles

Implementation of folder creation function

URL settings

todo/urls.py

Form creation

forms.py

Link to folder creation page

index.html

template

templates/create_folders.html

templates/create_folders.html

create_folders.html

views.py

Verification

Implementation of task creation function

URL settings

todo/urls.py

Form creation

todo/forms.py

Link to folder creation page

index.html

template

templates/create_tasks.html

views.py

Template extension

base.html

create_folders.html

create_tasks.html

index.html

in conclusion

List of articles

`todo/urls.py`

`forms.py`

`index.html`

`templates/create_folders.html`

`templates/create_folders.html`

`create_folders.html`

`views.py`

`todo/urls.py`

`todo/forms.py`

`index.html`

`templates/create_tasks.html`

`views.py`

`base.html`

`create_folders.html`

`create_tasks.html`

`index.html`