Dynamic path built for a .svg file using uuid and passing the constructed path to view not working

[Rahul]

Hi All,
       I am using uuid to create new temporary files for PYGAL chart. Although I can see the file being created and available in the file system. Even I can view the file in the browser, however when I serialize the path variable to be passed to the view, I get an error - A 404 not found error is shown inside a frame in my view. How do I serialize the path at runtime to src= in the view such that it should take the path that I have constructed using dynamicLinechartpath.. ? Below is the code
 

unique_filename = (str(uuid.uuid4()) +'.svg')
##...other code
## This creates the file in the file system
linechart.render_to_file(os.path.join(request.folder,'static/charts/' + unique_filename))

## Constructing the path to pass to the view
dynamicLinechartpath = (""" "{{=URL(r=request, c='static', f='charts/""" + unique_filename + """')}}" """)

Calling the path in view -

<figure>
       <embed type="image/svg+xml" src={{=dynamicLinechartpath}} />
 </figure>

I have tried

src="{{=dynamicLinechartpath}}

but  it does not work.  Is this proper approach ? What am I doing wrong?
Here is what 'response.flash' shows me in my view when I try to check what is being passed. which I think is looking good.

"{{=URL(r=request, c='static', f='charts/bf094fa3-a711-4118-a3aa-89f647cca4f1.svg')}}"

Please suggest,
Rahul D.

[Rahul]

Hi All - Any updates to this issue ?

Rahul.

[Nico de Groot]

Please check the rendered html in the browser. Then you can see what's going on. Maybe you need the host=True in URL() to get a full path.

Nico de Groot

[Rahul]

Thanks! Nico, But it does not work. I used urllib to decode the dynamically passed url to 'utf8' however it seems like I would have to pass a few more iterations to normalize the url.
Here is what is shown when I inspect the element. &quot;  is the problem area.
 

<figure>
                                  <embed type="image/svg+xml" src="{{=URL(r=request, c=&quot;static&quot;, f=&quot;charts_graphs/4a7c9543-26d3-4adf-bdba-a0b32a7f1b31.svg&quot;)}}" />
                                </figure>

Thanks! Rahul

[Nico de Groot]

The {{=...}} is meant to be used inside the view. You are using it also in the controller. Just use the URL() there to get back a path as a string. Send the resulting var to the view as you are already doing.
If you inspect the rendered HTML you'll understand the difference.

Nico

[Rahul]

Hi Nico,
         Thanks! for your support - Here's how I was finally achieved it.
Hardcoded the partial path  as below in the controller

dynamicLinechartpath = ("""/ApplicationName/static/charts/""" + unique_filename )Enter code here...

In the view, you dont need to use the URL parameter -
DLC is passed to the view which is nothing but dynamicLinechartpath variable.

<!--  Line chart trial-->
                                <figure>
                                  <embed type="image/svg+xml" src="{{=DLC}}" />
                                </figure>

This constructed the proper path in the view.

Thanks, Rahul

[Nico de Groot]

Hi Rahul,

You're welcome. Remarks: The triple double quotes are for multiline strings. Just use one pair of double or single quotes. And you can remove the parentheses, not needed here. Less is more.

Nico

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[Rahul]

Yes.  That was code copied from my previous code for trial and error code stubs. Agreed - Less is more.

Rahul.

Hi Rahul,

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