### Returning HttpResponseBadRequest with ajax_request

Source: https://github.com/beproud/bpcommons/blob/master/docs/ja/source/topics/ajax.rst

This example demonstrates how to return an `HttpResponse` object directly from a view decorated with `ajax_request`. In such cases, the decorator passes the `HttpResponse` through without attempting JSON conversion, allowing for custom responses like error messages.

```python
from django.contrib.auth.models import User
from commons.views.decorators import ajax_request
from django.http import HttpResponseBadRequest

@ajax_request
def myajax_view(request):
    user = User.object.get(pk=request.GET["id"])
    if user != request.user:
        return HttpResponseBadRequest(u"不正なリクエスト")
    return {
        "username": user.username,
        "fullname": user.get_full_name(),
    }
```

--------------------------------

### ChangeLog.rst Update

Source: https://github.com/beproud/bpcommons/blob/master/checklist.rst

Instructions to update the next release version in the ChangeLog.rst file.

```rst
.. ChangeLog.rst
   next version
```

--------------------------------

### bpcommons Release History and Version Support

Source: https://github.com/beproud/bpcommons/blob/master/ChangeLog.rst

This section details the version compatibility of the bpcommons project with Python and Django across its releases. It highlights supported versions, dropped versions, and dependency changes.

```python
Release 0.42 (2023-01-24)
- Support Django-4.1
- Support Python-3.8, 3.9, 3.10, 3.11
- Drop Django-2.2
- Drop Python-3.6, 3.7
```

```python
Release 0.41 (2022-01-25)
- Support Django-3.2
- Support Python-3.7, 3.8, 3.9, 3.10
- Drop Django-1.11
```

```python
Release 0.40 (2020-04-28)
- Fix: Field.rel and Field.remote_field.to are removed in Django 2.0
```

```python
Release 0.39 (2019-09-17)
Supports:
- Python-3.6, 3.7 (+ 3.7 / - 2.7)
- Django-1.11, 2.2 (+ 2.2 / - 1.8, 1.10 that doesn't support py36)
- Drop dependency: zenhan
```

```python
Release 0.38 (2017-07-11)
- Support Python-3.6
- Support Django-1.11
- Drop Django-1.9
- Remove dependency to bputils
```

```python
Release 0.37 (2016-11-25)
- Support Django-1.10
- Drop Python-2.6
- Drop Django-1.7 or earlier.
- Deprecate some classes:
  - beproud.django.commons.http.JsonResponse
  - beproud.django.commons.utils.javascript.DjangoJSONEncoder
- Drop some classes:
  - beproud.django.commons.models.fields.JSONField
  - beproud.django.commons.models.fields.PickledObjectField
  - beproud.django.commons.forms.JSONField
  - beproud.django.commons.forms.widgets.JSONWidget
  - beproud.django.commons.forms.widgets.AdminJSONWidget
- Drop ``switch`` templatetag.
- Remove 'BigIntegerField' from __all__ of beproud.django.commons.models.fields.
  Please use django.db.models.BigIntegerField instead.

Please use https://pypi.python.org/pypi/jsonfield instead of our JSONField.
```

```python
Release 0.35 (2016-01-15)
- Support Django-1.9
```

--------------------------------

### Twine Upload Command

Source: https://github.com/beproud/bpcommons/blob/master/checklist.rst

Command to upload the distribution files to the Python Package Index (PyPI).

```python
twine upload dist/*
```

--------------------------------

### Python Release Command

Source: https://github.com/beproud/bpcommons/blob/master/checklist.rst

Command to release the bpcommons project, creating source distribution and wheel files.

```python
python setup.py release sdist bdist_wheel
```

--------------------------------

### キャッシュ削除コマンド (rmcache)

Source: https://github.com/beproud/bpcommons/blob/master/docs/ja/source/management/commands.rst

指定されたキャッシュキーを削除するコマンドです。主に、デプロイ時に古いキャッシュデータを削除する際に使用されます。

```shell
python manage.py rmcache mycachekey
```

--------------------------------

### Git Tagging Command

Source: https://github.com/beproud/bpcommons/blob/master/checklist.rst

Command to create a Git tag for the new release version.

```git
git tag v0.40
```

--------------------------------

### Python Package Version Update

Source: https://github.com/beproud/bpcommons/blob/master/checklist.rst

Instructions to update the next release version within the bpcommons Python package initialization file.

```python
bpcommons/beproud/django/commons/__init__.py
   next version
```

--------------------------------

### Twine Check Command

Source: https://github.com/beproud/bpcommons/blob/master/checklist.rst

Command to check the integrity of the distribution files before uploading to PyPI.

```python
twine check dist/*
```

--------------------------------

### FullWidthCharField - 全角文字フィールド

Source: https://github.com/beproud/bpcommons/blob/master/docs/ja/source/forms/fields.rst

FullWidthCharFieldは、フィールドの値が全角文字のみで構成されていることを検証します。現在、UTF-8エンコーディングのみをサポートしています。

```python
from django import forms
from commons.forms import FullWidthCharField

class MyForm(forms.Form):
    name = FullWidthCharField(label=u'名前')
```

--------------------------------

### Standard Django AJAX View

Source: https://github.com/beproud/bpcommons/blob/master/docs/ja/source/topics/ajax.rst

This snippet demonstrates the traditional way to handle AJAX requests in Django, requiring manual JSON serialization and mimetype specification.

```python
from django.contrib.auth.models import User
from django.utils import simplejson

def myajax_view(request):
    user = User.object.get(pk=request.GET["id"])
    return HttpResponse(simplejson.dumps({
        "username": user.username,
        "fullname": user.get_full_name(),
    }), mimetype="text/javascript")
```

--------------------------------

### JSONField - 非推奨

Source: https://github.com/beproud/bpcommons/blob/master/docs/ja/source/forms/fields.rst

JSONFieldは非推奨となり、削除されました。代わりに `jsonfield` ライブラリ（https://pypi.org/project/jsonfield/）を使用してください。

--------------------------------

### Using ajax_request Decorator for JSON Response

Source: https://github.com/beproud/bpcommons/blob/master/docs/ja/source/topics/ajax.rst

This snippet shows how to use the `ajax_request` decorator to automatically convert a Python dictionary returned by a view into a JSON response. This simplifies the process and handles serialization of various data types.

```python
from django.contrib.auth.models import User
from commons.views.decorators import ajax_request

@ajax_request
def myajax_view(request):
    user = User.object.get(pk=request.GET["id"])
    return {
        "username": user.username,
        "fullname": user.get_full_name(),
    }
```

--------------------------------

### StripRegexField - 正規表現検証付きフィールド

Source: https://github.com/beproud/bpcommons/blob/master/docs/ja/source/forms/fields.rst

StripRegexFieldは、検証前にフィールドの値から空白文字を削除し、指定された正規表現にマッチするかどうかを検証します。これは、ユーザー入力をクリーンアップし、特定のパターンに準拠させるのに役立ちます。

```python
from django import forms
from commons.forms import StripRegexField

class MyForm(forms.Form):
    name = StripRegexField('^Monty', label=u'名前', error_message=u'名前はMontyから始まらないといけません。')
```

--------------------------------

### Django Template Tag: to_anchortrunc

Source: https://github.com/beproud/bpcommons/blob/master/tests/templates/templatetags_tests/to_anchortrunc.html

Filters a string to truncate it and create an anchor link. It takes a maximum length as an argument.

```django
{% load html_tags %}
{{ my_data|to_anchortrunc:15 }}
```

--------------------------------

### NumCharField - 数字のみを許可するフィールド

Source: https://github.com/beproud/bpcommons/blob/master/docs/ja/source/forms/fields.rst

NumCharFieldは、フィールドの値が数字のみで構成されていることを検証します。伝票IDや数値コードなどの入力に便利です。

```python
from django import forms
from commons.forms import NumCharField

class MyForm(forms.Form):
    voucher_id = NumCharField(label=u'伝票ID')
```

--------------------------------

### Django Template Tag for Anchor Links

Source: https://github.com/beproud/bpcommons/blob/master/tests/templates/templatetags_tests/to_anchor.html

This snippet demonstrates the usage of the 'to_anchor' template filter from the 'html_tags' library in Django. It's used to generate anchor links from data.

```django
{% load html_tags %}
{{ my_data|to_anchor }}
```

--------------------------------

### HiraganaCharField - 全角ひらがなフィールド

Source: https://github.com/beproud/bpcommons/blob/master/docs/ja/source/forms/fields.rst

HiraganaCharFieldは、フィールドの値が全角ひらがなのみで構成されていることを検証します。現在、UTF-8エンコーディングのみをサポートしています。

```python
from django import forms
from commons.forms import HiraganaCharField

class MyForm(forms.Form):
    name = HiraganaCharField(label=u'名前')
```

--------------------------------

### EmailField - 拡張電子メール検証

Source: https://github.com/beproud/bpcommons/blob/master/docs/ja/source/forms/fields.rst

このEmailFieldは、Djangoの標準EmailFieldよりも寛容な電子メールアドレス検証を提供し、特に日本の携帯電話メールアドレスのようなフォーマットをサポートします。DjangoのEmailFieldと同様に使用できます。

```python
from django import forms
from commons.forms import EmailField 

class MyForm(forms.Form):
    email = EmailField(label=u"メールアドレス")
```

--------------------------------

### AlphaNumField - 英数字とアンダースコア/ハイフンフィールド

Source: https://github.com/beproud/bpcommons/blob/master/docs/ja/source/forms/fields.rst

AlphaNumFieldは、半角英数字、アンダースコア（_）、およびハイフン（-）のみを許可するフィールドです。ユーザー名やIDなどの入力検証に適しています。

```python
from django import forms
from commons.forms import AlphaNumField

class MyForm(forms.Form):
    username = AlphaNumField(label=u'ユーザ名')
```

--------------------------------

### Abbreviate String in Django Templates

Source: https://github.com/beproud/bpcommons/blob/master/tests/templates/templatetags_tests/string_tags.html

This snippet demonstrates how to use the 'abbrev' template filter from the 'string_tags' library to shorten strings within a Django template. It takes a string variable and an integer specifying the maximum length.

```django
{% load string_tags %}
{{ my_data|abbrev:10 }}
```

--------------------------------

### Abbreviate String Filter

Source: https://github.com/beproud/bpcommons/blob/master/tests/templates/templatetags_tests/string_tags2.html

The `abbrev` filter from `string_tags` is used to truncate a string to a specified length, appending an ellipsis if truncation occurs. It's useful for displaying long strings concisely in templates.

```django
{% load string_tags %}
{% filter abbrev:10 %}{{ my_data }}{% endfilter %}
```

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