Set a variable in Django template
Summary 1. Create “templatetags” folder at the same level as models.py, views.py. 2. Create “__init__.py” file in “templatetags” folder. The content will be empty. 3. Create “set_var.py” file in “templatetags” folder. And copy and paste below code
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from django import template register = template.Library() class SetVarNode(template.Node): def __init__(self, var_name, var_value): self.var_name = var_name self.var_value = var_value def render(self, context): try: value = template.Variable(self.var_value).resolve(context) except template.VariableDoesNotExist: value = "" context[self.var_name] = value return u"" def set_var(parser, token): """ {% set <var_name> = <var_value> %} """ parts = token.split_contents() if len(parts) < 4: raise template.TemplateSyntaxError("'set' tag must be of the form: {% set <var_name> = <var_value> %}") return SetVarNode(parts[1], parts[3]) register.tag('set', set_var) |
4. In template html file, add “{% load set_var %}” after {% extends ‘base.html’ %} 5. […]