Pragmatic tools and utilities for Django projects

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Project description

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django-pragmatic

Pragmatic tools and utilities for Django projects

Tested on Django 1.5 up to Django 1.10.2

Requirements

  • Django

Some utilities require additional libraries as:

  • django_filters

  • fpdf

  • Pillow/PIL

  • pyBarcode

Installation

  1. Install python library using pip: pip install django-pragmatic

  2. Add pragmatic to INSTALLED_APPS in your Django settings file

Usage

Templates

pragmatic/helpers/breadcrumbs.html

Template helper for django-breadcrumbs app.

pragmatic/helpers/confirm_delete.html

Form for delete confirmation.

pragmatic/helpers/messages.html

Template helper for django messages framework.

pragmatic/helpers/pagination.html

Template helper for paginating objects in ListViews.

pragmatic/helpers/pagination-listview.html

Template helper for paginating objects in ListViews.

maintenance_mode.html

Template for maintenance mode. See MaintenanceModeMiddleware below.

Template tags

{% load pragmatic_tags %}

def klass(obj)

Returns string of instance class name.

def translate(obj)

Returns translated string of input value (string or any object).

def filename(obj)

Returns name of the file without its path (basename).

def bootstrap3_field(field)

Adds form-control class to field widget classes.

def filtered_objects_counts(filtered, all)

Returns translatable percentage description of value filtered/all in this format: ‘<strong>%d (%.2f%%)</strong> filtered, from a total of %d’ % (filtered, percent, all)’

def qrcode(value, alt=None)

Outputs generated QR code using Google charts API from a given string and adds alternative description to it.

def barcode(code, args=None):

Outputs generated barcode using pyBarcode library from a given string.

def paginator(context, objects, page_ident='page', anchor=None, adjacent=2)

Pagination template tag.

def divide(value, arg)

Divides the value by argument.

def multiply(value, arg)

Multiplies the value by argument.

def add(value, arg)

Adds the arg to the value.

def subtract(value, arg)

Subtracts the arg to the value.

def capture(parser, token)

Capture contents of block into context.

Context processors

def date_formats(request)

Returns a lazy ‘date formats’ context variables DATE_FORMAT_JS, DATE_FORMAT_TAG, DATE_FORMAT_FULLMONTH_TAG, from settings file.

def installed_apps(request)

Returns a lazy ‘INSTALLED_APPS’ context variable.

Decorators

def permissions_required(app_label, login_url=None, raise_exception=False)

Decorator for views that checks whether a user has at least one app permission enabled, redirecting to the log-in page if necessary. If the raise_exception parameter is given the PermissionDenied exception is raised and app label of missing permission is stored in user instance.

def permission_required(perm, login_url=None, raise_exception=False)

Decorator for views that checks whether a user has a particular permission enabled, redirecting to the log-in page if necessary. If the raise_exception parameter is given the PermissionDenied exception is raised and missing permission is stored in user instance.

def receiver_subclasses(signal, sender, dispatch_uid_prefix, **kwargs)

A decorator for connecting receivers and all receiver’s subclasses to signals.

Fields

class RangeField(forms.Field)

Form field which expects input to be a number or number range (2 numbers divided with ‘-‘).

class MultiSelectField(models.Field)

Model field which stores multiple choices as a comma-separated list of values, using the normal CHOICES attribute.

class MultiSelectFormField(forms.MultipleChoiceField)

Form field for model field above (MultiSelectField).

class TruncatedModelChoiceField(forms.ModelChoiceField)

ModelChoiceField is a form field which truncates overflowed characters from instance label and adds ‘…’ instead of them.

Filters

class TruncatedModelChoiceFilter(forms.ModelChoiceField)

Filter field for TruncatedModelChoiceField.

class OneFieldRangeFilter(django_filters.Filter)

Filter field for RangeField.

Middleware

class MaintenanceModeMiddleware(object)

It looks for settings.MAINTENANCE_MODE attribute. If it is set to True, template maintenance_mode.html will render for each request.

Loghandlers

class AlternativeAdminEmailHandler(AdminEmailHandler)

Same as django.utils.log import AdminEmailHandler, but uses ALTERNATE_EMAIL_HOST_PASSWORD, ALTERNATE_EMAIL_HOST_USER, ALTERNATE_EMAIL_HOST, ALTERNATE_EMAIL_PORT and ALTERNATE_EMAIL_USE_TLS as connection settings.

Mixins

class ReadOnlyFormMixin(forms.BaseForm)

Adds ‘readonly and ‘disabled’ attributes to fields specified in read_only form attribute.

class DeleteObjectMixin(object)

Mixin for object delete confirmation. Implement get_parent() method or get_success_url() and get_back_url() methods instead.

class PickadateFormMixin(object)

Mixin which fixes pickadate.js inputs and adds data-value attribute to them if you use your own date formats.

class FPDFMixin(object)

Mixin helper for generating PDF outputs in Django using fpdf library.

Widgets

class GroupedCheckboxSelectMultiple(CheckboxSelectMultiple)

Advanced form field widget for grouping multiple choices into custom groups. Use it with static/js/grouped-checkboxes.js

Thirdparty

class BarcodeImageWriter(ImageWriter)

Fixed version of barcode.writer.ImageWriter.

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