Get all django remaining migrations
It will return list of all remaining migrations
- migration
- migrations
Snippet List
Change language in template using templatetag
It will help for change URL in available languages in template
- template
- templatetag
- translation
Custom DRF browsable API interface for InBBoxFilter of django-rest-framework-gis
[DRF browsable API interface](http://www.django-rest-framework.org/api-guide/filtering/#customizing-the-interface) for django-rest-framework-gis [InBBoxFilter](https://github.com/djangonauts/django-rest-framework-gis#inbboxfilter) Tested with Django==1.10.5 django-filter==1.0.1 djangorestframework==3.5.4 djangorestframework-gis==0.11 
- django
- django-rest-framework
- django-rest-framework-gis
Get template filename from within the template
Two simple tags to extract the template filename from within a template.
- template
- filename
query builder
""" Takes arguments & constructs Qs for filter() We make sure we don't construct empty filters that would return too many results We return an empty dict if we have no filters so we can still return an empty response from the view """
- query
- queryset
aggregate filter
Makes it possible to add a filtering condition directly after the aggregate function (or possible, `aggregate(expression) WITHIN GROUP (ordering clause)`. This is mostly useful if the annotation has two or more expressions, so it's possible to compare the result with and without the applied filter; it's more compact than using `Case`. It's suggested to add `values` to the queryset to get a proper group by. Usage example: `books = Book.objects.values('publisher__name').annotate( count=Count('*'), filtercount=Filter(expression=Count('publisher__name'), condition=Q(rating__gte=5)) ) ` Supported on Postgresql 9.4+. Possible other third-party backends.
- filter
- postgresql
- olap
- aggregate
- expression
replace
Small example of how to write your own function. This is not available in Django. The function just replaces static text strings, regular expressions are not supported. The syntax is the same in SQLite, PostgreSQL, MySQL and Oracle.
- text
- replace
CNPJ and CPF Validation for Models
The code was placed inside a helper file without using a class. The Django validator was not designed to work with validator classes, it would appear, so retrieving the value from the field proved to be a hassle. Just create a helper file, import it on your model, and use the validator in the standard way, as such: cnpj = models.CharField(unique=True, max_length=14, validators=[validate_CNPJ]) cpf = models.CharField(unique=True, max_length=14, validators=[validate_CPF])
- model
- validation
- cnpj
- cpf
Simply Gravatar Templatetags
Simply Gravatar Templatetags, for example the name of this templatetag is: `templatetags/gravatar_tags.py`, this supported for Python2 or Python3.
- django
- image
- templatetag
- gravatar
Django chunked queryset iterator
The function slices a queryset into smaller querysets containing chunk_size objects and then yield them. It is used to avoid memory error when processing huge queryset, and also database error due to that the database pulls whole table at once. Concurrent database modification wouldn't make some entries repeated or skipped in this process.
- django
- python
- database
- queryset
- iterator
- memoryerror
Django Ajax Image Uploader
Django Ajax Image Uploader, this what we do for: https://github.com/agusmakmun/dracos-markdown-editor/
- ajax
- django
- image
- uploader
Resize or Modify an image before saving
Small snippet that will resize all images before they uploaded to the server.
- image
- pil
- resize
- save
- imagefield
- modified
- pre_save
- override
CSVField for forms
FileField that checks that the file is a valid CSV and if specified in `expected_fieldnames` checks that the fields match exactly. The widget's `accept` parameter is set to accept csv, text and excel files. **TODO**: Validate the entirety of the CSV file, not just the headers. But this should be enough for most use cases, as checking the whole file could be computationally expensive for huge files. Example usage: people = CSVField(expected_fieldnames=['First Name', 'Last Name'])
- forms
- csv
- field
A streamable "export to CSV" admin action
This snippets is inspired from [#2995](https://djangosnippets.org/snippets/2995/) but add the following: * get rid of `singledispatch` so we can use it with python2 without pip installing anything * streaming capabilities * the configuration params (header, fields, exclude...) are passed to the action function so we don't pollute the ModelAdmin class * fix utf8 issue in header
- admin
- export
- csv
- action
- stream
- export-csv
Django 1.10 Internationalization Middleware
Django 1.10 Internationalization Middleware, more complete tutorial: https://python.web.id/blog/how-to-implement-django-internationalization/
- internationalization
- middleware
2955 snippets posted so far.