django-ui-widgets 1.6.0

Library of django ui widgets

django-ui-widgets

This is an add-on for django, consisting of improved widgets and fields with an expanded viewing interface and advanced features. Django widgets are taken as a basis.

Package contains

• DynamicMultiSelect
• DynamicSelect
• DynamicModelField
• CustomImageField
• AutoUrlInput
• JSONViewWidget
• DateWidget
• DivHyperModelForm

DynamicMultiSelect

This is a replacement for SelectMultiple. In fact, it is an analog of django-autocomplete without using jquery. Usage:

from ui.widgets import DynamicMultiSelect

class ProfileUpdateForm(ModelForm): 

    labels = ModelMultipleChoiceField(
        queryset=SkillLabel.objects.all(),
        widget=DynamicMultiSelect(reverse_lazy('tag_filter'))
    )

    class Meta:
        model = Profile

    def __init__(self, *args, **kwargs):

        super().__init__('submit', *args, **kwargs)
        if 'data' not in kwargs:
            self.fields['labels'].queryset = SkillLabel.objects.filter(profile=self.instance)
            self.fields['labels'].widget.choices = ModelChoiceIterator(self.fields['labels'])

In the example above, tag_filter is a name of view url, that consists of filter returning JsonResponse object with a list of dicts contained id and name keys:

def tag_filter(request: HttpRequest):

    pattern = request.GET.get('query', '')
    result = SkillLabel.objects\
        .filter(name__startswith=pattern)\
        .extra(select={'hint': 'name'}) \
        .values('id', 'name') if pattern else ()

    return JsonResponse(list(result), safe=False)

You can also use .annotate(value=F('name') instead of extra for receiving proper name name for view in template.

Also pay attention to the choice assignment when transmitting data. This is necessary for correct form validation when checking primary keys

DynamicSelect

Like DynamicMultiSelect DynamicSelect is replacement standart Select django widget for ForeignKey model fields with asynchronius autofillng from specified url. Works without jquery. Using like DynamicMultiSelect or through DynamicModelField (recomended):

DynamicModelField

DynamicModelField is field using DynamicSelect widget.

The simplest usage example:

form.fields['type'] = DynamicModelField(
    reverse('tag_filter'),
    SkillLabel.objects.filter(id=form.instance.type_id),
    'Field Placeholder',
)

In constructor you also can specify class_name and optional attrs for DynamicSelect widget:

form.fields['type'] = DynamicModelField(
    reverse('tag_filter'),
    SkillLabel.objects.filter(id=form.instance.type_id),
    placeholder='Placeholder',
    class_name='my_class',
    attrs={'style': 'margin-bottom:0'}
)

you can use several of these fields on the same page and in the same form

CustomImageField

A field that hides input with the file type and allows you to set the css class for the label pointing to it. This is a common (and almost default) practice of decorating 'input[type=file]' in classic frontend development, which requires a lot of actions. With this component, you can do it in one line. Recommended usage:

    image = CustomImageField(label_css_class='image_icon', back_image='photo_up.jpg')

In above sample by default inside CustomImageField is used ImageWidget. You can override this widget if you want. However, this is not recommended, since in this case you will need to manually implement the display of the image when it is updated

AutoUrlInput

Replacement for URLInput. Adds an automatic 'https://' extension at the beginning of the line if the address is invalid

Attention! for this widget to work correctly, you must explicitly specify links to media resources in the template after the form, such as: {{ form.media }}

DateWidget

Customized DateInput widget:

JSONViewWidget

JSONViewWidget - widget for displaying the content of model.JSONField (a field officially added in django 3.1). Designed specifically for use in the admin interface. Usage example:

class SkillAdmin(admin.ModelAdmin):
    formfield_overrides = {
            models.JSONField: {            
                'widget': JSONViewWidget(                
            ) 
        },
    }

JSONViewWidget inspired by SplitJSONWidget. But it has the following features that are missing in SplitJSONWidget, currently:

• adding and removing notes of the tree first level
• editing for array entries of the tree first level
• view, editing and deleting for the notes of embedded levels

forms

DivHyperModelForm

custom ModelForm with two new methods:

• as_ht() - works like as_p in template, but it already contains all the necessary content of the form tag. It means, small calling {{form.as_p}} by rendering deploys to following code:

<form method="post" {{cssclass}}>
    {% csrf_token %}
    {{form.as_p}}
    <input type="submit" value="{{submit}}">
</form>

• as_div - works like as_ht, but instaed of p tag to display each item of the form fields it takes div

Optional attributes:

• action - specify action attribute for the <form> tag
• css_class - specify class attribute for the <form> tag
• submit - specify value attribute for <submit> tag inside tag form

Usage:

class ProfileUpdateForm(DivHyperModelForm):  

    class Meta:
        model = Profile
        exclude = ('user',)

    def __init__(self, *args, **kwargs):

        super().__init__('submit', 'form_class', *args, **kwargs)
	self.action = reverse('some_next_page')

or

class ProfileUpdateForm(DivHyperModelForm):  
    action = '/'
    submit = 'ok'
    css_class = 'form_class'
    
    class Meta:
        model = Profile
        exclude = ('user',)

Create instance and pass to template:

context = {'form': ProfileUpdateForm(submit='ok', request=request)}
render('template_name.html', context, request)

in template:

<!DOCTYPE html>
<html lang="ru">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">	
</head>
<body>
	{{form.as_div}}
	{{form.media}}
</body>

in above sample usage {{form.media}} is optionally like standart form

Installation:

There are two steps:

• First step: install through pip utility from one of the following sources:

  • pypi

  pip install django-ui-widgets
  

  • github (latest version) (recomended)

  pip install git+http://github.com/Sanshain/django-ui-widgets
  

• Second step: add "ui" app to INSTALLED_APPS inside settings.py of your project:

  INSTALLED_APPS = [
   'django.contrib.admin',
   'django.contrib.auth',
   'django.contrib.contenttypes',
   'django.contrib.sessions',
   'django.contrib.messages',
   'django.contrib.staticfiles',
   
   #...
   
   'ui',
   
   #...
  ]
  

Finish