This is useful in the rare cases where you need multiple escaping or want to apply other filters to the escaped results. Normally, you want to use the escape filter. Given a whole number, returns the requested digit, where 1 is the right-most digit, 2 is the second-right-most digit, etc.
Returns the original value for invalid input if input or argument is not an integer, or if argument is less than 1. Otherwise, output is always an integer. If value is , the output will be 8. If value is "? This is compatible with a strict Content Security Policy that prohibits in-page script execution. It also maintains a clean separation between passive data and executable code. If value is the list ['a', 'b', 'c', 'd'] , the output will be the string "d".
If value is ['a', 'b', 'c', 'd'] or "abcd" , the output will be 4. The filter returns 0 for an undefined variable. If value is ['a', 'b', 'c', 'd'] or "abcd" , the output will be True.
If value is Django , the output will be "Django ". Returns the value turned into a list. For an integer, the argument is cast to a string before creating a list.
If value is the string "Joel" , the output would be the list ['J', 'o', 'e', 'l']. If value is , the output will be the list ['1', '2', '3']. Returns a plural suffix if the value is not 1 , '1' , or an object of length 1. By default, this suffix is 's'.
For words that require a suffix other than 's' , you can provide an alternate suffix as a parameter to the filter. Use blocktranslate to pluralize translated strings. A wrapper around pprint. If value is the list ['a', 'b', 'c', 'd'] , the output could be "b". If value is Django , the output will be " Django". Marks a string as not requiring further HTML escaping prior to output.
When autoescaping is off, this filter has no effect. If you are chaining filters, a filter applied after safe can make the contents unsafe again. For example, the following code prints the variable as is, unescaped:. Applies the safe filter to each element of a sequence. Useful in conjunction with other filters that operate on sequences, such as join.
Converts spaces to hyphens. Converts to lowercase. Also strips leading and trailing whitespace. If value is "Joel is a slug" , the output will be "joel-is-a-slug". Formats the variable according to the argument, a string formatting specifier. If value is 10 , the output will be 1. If you are looking for something more robust, you can use the bleach Python library, notably its clean method.
Note that the predefined format is locale-dependent. If value is equivalent to datetime. The time filter will only accept parameters in the format string that relate to the time of day, not the date. If you need to format a date value, use the date filter instead or along with time if you need to render a full datetime value. There is one exception the above rule: When passed a datetime value with attached timezone information a time-zone-aware datetime instance the time filter will accept the timezone-related format specifiers 'e' , 'O' , 'T' and 'Z'.
Takes an optional argument that is a variable containing the date to use as the comparison point without the argument, the comparison point is now. Similar to timesince , except that it measures the time from now until the given date or datetime. Takes an optional argument that is a variable containing the date to use as the comparison point instead of now.
Converts a string into titlecase by making words start with an uppercase character and the remaining characters lowercase. Truncates a string if it is longer than the specified number of characters. If value is "Joel is a slug" , the output will be "Joel i…".
Similar to truncatechars , except that it is aware of HTML tags. Any tags that are opened in the string and not closed before the truncation point are closed immediately after the truncation. If value is "Joel is a slug" , the output will be "Joel is …". Similar to truncatewords , except that it is aware of HTML tags.
Any tags that are opened in the string and not closed before the truncation point, are closed immediately after the truncation. This is less efficient than truncatewords , so should only be used when it is being passed HTML text. The list is assumed to be in the proper format. An empty string can be provided when all characters should be escaped. It also supports domain-only links ending in one of the original top level domains. For example, djangoproject. Links can have trailing punctuation periods, commas, close-parens and leading punctuation opening parens , and urlize will still do the right thing.
If value is "Check out www. In addition to web links, urlize also converts email addresses into mailto: links. If value is "Send questions to foo example. The urlize filter also takes an optional parameter autoescape. The default value for autoescape is True. Apply this filter only to plain text. Converts URLs and email addresses into clickable links just like urlize , but truncates URLs longer than the given character limit. As with urlize , this filter should only be applied to plain text.
If value is "Joel is a slug" , the output will be 4. Connect and share knowledge within a single location that is structured and easy to search. While setting up the django-registration module I have run into a bit of trouble.
Everything works correctly as far as rendering templates. After trying to test-register I am hit with this error. I do have Django. Any help is appreciated. So perhaps you should have "django. See Django docs on django. Stack Overflow for Teams — Collaborate and share knowledge with a private group. Create a free Team What is Teams?
CommonMiddleware', 'django. CsrfViewMiddleware', 'django. AuthenticationMiddleware', 'django. SessionAuthenticationMiddleware', 'django. MessageMiddleware', 'django. The text was updated successfully, but these errors were encountered:. Either this list is incomplete or you don't have suit properly installed -- or you have created another application called suit.
This will be used as a template context for the template fragment. This template is a fixed feature of the tag: the tag writer specifies it, not the template designer. Following our example, the template is very short:.
Following our example, if the above template is in a file called results. Alternatively it is possible to register the inclusion tag using a django. Template instance:. Sometimes, your inclusion tags might require a large number of arguments, making it a pain for template authors to pass in all the arguments and remember their order.
Note that the first parameter to the function must be called context. In that register. Then, any time you want to use that custom tag, load its library and call it without any arguments, like so:. It automatically gets access to the context. The template system works in a two-step process: compiling and rendering.
To define a custom template tag, you specify how the compilation works and how the rendering works. Each node is an instance of django. Node and has a render method. A compiled template is a list of Node objects. When you call render on a compiled template object, the template calls render on each Node in its node list, with the given context. The results are all concatenated together to form the output of the template. For each template tag the template parser encounters, it calls a Python function with the tag contents and the parser object itself.
This function is responsible for returning a Node instance based on the contents of the tag. The parser for this function should grab the parameter and create a Node object:. The second step in writing custom tags is to define a Node subclass that has a render method. Continuing the above example, we need to define CurrentTimeNode :. Ultimately, this decoupling of compilation and rendering results in an efficient template system, because a template can render multiple contexts without having to be parsed multiple times.
However, there are still a couple of things you should keep in mind when writing a template tag. When the variable is ultimately rendered, it will be affected by the auto-escape setting in effect at the time, so content that should be safe from further escaping needs to be marked as such.
If we had neglected to pass in the current context. Once a node is parsed, its render method may be called any number of times. Since Django is sometimes run in multi-threaded environments, a single node may be simultaneously rendering with different contexts in response to two separate requests. To make sure your template tags are thread safe, you should never store state information on the node itself.
A naive implementation of CycleNode might look something like this:. This is not what we want! The tag method takes two arguments:.
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