Appengine Django Template - Read template tags

0
votes

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())
2
pythondjangogoogle-app-engine
"all my data is in several templates" - I don't understand this. Why is data in a template? - SingleNegationElimination
It's like the best of todays MVC architecture mated with a web site from 1996. - aaronasterling
It was far easy to put all the data in templates and put these in dropbox for my project managers to edit - only 15 pages of data, put all these in a DB was overkill. - John Ballinger
You know what would have been even easier? An Excel file. Managers Like excel. Programmers also like excel because they can turn that into CSV. DBA's like CSV's cause they can import that right into the database. - SingleNegationElimination
I still think this is a good way to go. Maybe I could render my data into a different template eg [{%block price%}{%end block%}] and go from there. - John Ballinger

2 Answers

3
votes

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']
1
votes

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