how do I replace string in django when displaying a value

Question

I need to change any ' to \' when displaying a value in my template.

so eg {{ account.company_name|escapejs }} should replace any ' with \'

how do I do that ?

thanks Thomas

** UPDATED CODE BASED ON COMMENTS BELOW **

My directory-structure is like this:

myapp/
  ....
  templatetags/
     __init__.py
     replace.py

Replace.py contains:

from django import template
register = template.Library()
from django.template import defaultfilters

@register.filter
@defaultfilters.stringfilter
def replace(value, args=","):
    try:
        old, new = args.split(',')
        return value.replace(old, new)
    except ValueError:
        return value

and in settings.py I have

INSTALLED_APPS = ( 'myapp' )

In my template I try to load the customtag like this:

{% from replace load replace %}

and it is used like this

company_name='{{ account.company_name|escapejs|replace:"',\'" }}'

I then received this error:

TemplateSyntaxError: Invalid block tag: 'from'

and then changed to

{% load replace %} instead of {% from replace load replace %}

but then I get this error:

TemplateSyntaxError: 'replace' is not a valid tag library: Template library replace not found, tried google.appengine._internal.django.templatetags.replace

Any help is appreciated

Burhan Khalid · Accepted Answer · 2014-03-20 12:10:57Z

1

Use the addslashes built-in filter:

From the documentation's example:

{{ value|addslashes }}

If value is "I'm using Django", the output will be "I\'m using Django".

answered Mar 20, 2014 at 12:10

Burhan Khalid

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Comments

Germano · Accepted Answer · 2014-03-19 13:55:02Z

0

You can write your own filter:

@register.filter
@defaultfilters.stringfilter
def replace(value, args=","):
    try:
        old, new = args.split(',')
        return value.replace(old, new)
    except ValueError:
        return value

Then in your template:

{% load replace from mycustomtags %}

{{ account.company_name|escapejs|replace:"',\'" }}

(I haven't tested)

answered Mar 19, 2014 at 13:55

Germano

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8 Comments

ThomasD Over a year ago

thanks, Where do I add the filter ? Sorry if this is a basic question

Germano Over a year ago

Documentation is your friend docs.djangoproject.com/en/1.6/howto/custom-template-tags

ThomasD Over a year ago

and added it to my template, per your instructions, but I cannot get it to work. I am getting this error "TemplateSyntaxError: 'replace' is not a valid tag library: Template library replace not found, tried google.appengine._internal.django.templatetags.replace"

Germano Over a year ago

Add from django.template import default filters. Sorry that I missed that.

ThomasD Over a year ago

I am getting this error "TemplateSyntaxError: 'replace' is not a valid tag library: Template library replace not found, tried google.appengine._internal.django.templatetags.replace" I tried both {% load replace %} and {% load replace from mycustomtags %} at the top top of my template

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