CODEWITHSUNDEEP
pythondjangogoogle-app-engine
John Ballinger
John Ballinger

Reputation: 7550

Appengine Django Template - Read template tags

UPDATE 1 ADDED UPDATED CODE

I have a django template on app engine. Currently all my data is in several templates and I would like to read the templates off disk. Very easy, but I would like to get the values out of these templates in AppEngine.

eg. file : p1.html

{%block price%}$259{%endblock%}  
{%block buy%}http://www.highbeam.co.nz/store/index.php?route=product/product&path=6&product_id=116{%endblock%}  
{%block info%}http://www.inov-8.co.nz/oroc280.html{%endblock%}

Can I load and read these template into some value and go.

template['price']

which would be

$259

I can easily inject data into the template, but I want to parse out the data between my block tags.

UPDATED 2 With the help of aaronasterling (THANKS) the final code is this. Final code to get the value out of a Django template on app engine. path = os.path.join(os.path.dirname(file), 'home/p2.html') 

    file = open(path)
    entry = file.read()
    file.close()   
    entry = entry.replace("{% extends \"product.html\" %}","")   

    t = Template(entry) 

    product = {}
    for node in t.nodelist[0].nodelist  :   
       if hasattr(node, 'name'):
          product[node.name] = node.render(Context())

Upvotes: 0

Views: 445

Answers (2)

aaronasterling
aaronasterling

Reputation: 71014

Update 1 fixed to traverse the whole node tree.

Update 2 Actually tested it so now it works.

Here's one way to do it.

from django.template import Template, Context

t = Template(template_string) # get it with open(filename).read() I guess


def get_block_contents(t, block_name, context=None):
    if context is None:
        context = Context()
    stack = t.nodelist[:]
    while stack:
        node = stack.pop()
        if hasattr(node, 'name') and node.name == block_name:
            return node.render(context)
        if hasattr(node, 'nodelist'):
            stack.extend(node.nodelist)
    return False # Or raise an error

Upvotes: 1

SingleNegationElimination
SingleNegationElimination

Reputation: 156158

Sounds like you've shot yourself in the foot. Lets just pretend we aren't to blame and fix it:

entry = """{%block price%}$259{%endblock%}  
{%block buy%}http://www.highbeam.co.nz/store/index.php?route=product/product&path=6&product_id=116{%endblock%}  
{%block info%}http://www.inov-8.co.nz/oroc280.html{%endblock%}   """

parsedentry = dict([(j[0].split(' ')[-1], j[-1]) for j in [i.partition("%}") for i in entry.split("{%endblock%}")] if j[0].split(' ')[-1]])

print parsedentry['price']

Upvotes: 3

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