**Callmethod** - TemplateTag to call a method on an object with arguments from within a template
{% callmethod hotel.room_price_for_night night_date="2018-01-02" room_type=room_type_context_var %}
## equals ##
>>> hotel.room_price_for_night(night_date="2018-01-02", room_type="standard") #Assuming "standard" is the value of room_type_context_var
Django doesn't allow calling a method with arguments in the template to ensure good separation of
design and code logic.
However, sometimes you will be in situations where it is more maintainable to pass an argument
to a method in the template than build an iterable (with the values already resolved) in a view.
Furthermore, Django doesn't strictly follow its own ideology: the {% url "url:scheme" arg, kwarg=var %}
templatetag readily accepts variables as parameters!!
This template tag allows you to call a method on an object, with the specified arguments.
Usage:
{% callmethod object_var.method_name "arg1_is_a_string" arg2_is_a_var kwarg1="a string" kwarg2=another_contect_variable %}
e.g.
{% callmethod hotel.room_price_for_night date="2018-01-02" room_type="standard" %}
{% callmethod hotel.get_booking_tsandcs "standard" %}
NB: If for whatever reason you've ended up with a template context variable with the same name as the method you want to
call on your object, you will need to force the template tag to regard that method as a string by putting it in quotes:
{# Ensure we call hotel.room_price_for_night() even though there's a template var called {{ room_price_for_night }}! #}
{% callmethod hotel."room_price_for_night" date="2018-01-02" room_type="standard" %}
* **@author:** Dr Michael J T Brooks
* **@version:** 2018-01-05
* **@copyright:** Onley Group 2018 (Onley Technical Consulting Ltd) [http://www.onleygroup.com](http://www.onleygroup.com)
* **@license:** MIT (use as you wish, AS IS, no warranty on performance, no liability for losses, please retain the notice)
* **@write_code_GET_PAID:** Want to work from home as a Django developer? Earn £30-£50 per hour ($40-$70) depending on experience for helping Onley Group develop its clients' Django-based web apps. E-mail your CV and some sample portfolio code to: [email protected]
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- template
- tag
- templatetag
- function
- template-tag
- args
- kwargs
- methods
- argument
- template-arguments